Skip to main content
Top

2013 | OriginalPaper | Chapter

12. Animal Models of Orthopedic Implant-Related Infection

Authors : Lorenzo Calabro, Cameron Lutton, Ahmed Fouad Seif El Din, R. Geoff Richards, T. Fintan Moriarty

Published in: Biomaterials Associated Infection

Publisher: Springer New York

Activate our intelligent search to find suitable subject content or patents.

search-config
loading …

Abstract

Musculoskeletal infection remains a great challenge in orthopedic and trauma surgery. Despite best medical and surgical practice and significant advances in research and development, bone and implant associated infections are still difficult to diagnose, impossible to prevent in all cases and require invasive and debilitating treatment. The development and safe clinical implementation of novel preventative, therapeutic or diagnostic strategies requires the use of animal models of infection, which provide crucial evidence regarding performance, cytocompatibility, biocompatibility, and safety prior to clinical implementation.
Many animal models of musculoskeletal infection have been described in the literature; however, there remains a dearth of fully standardized or universally accepted reference models hindering advancement in the field. The following chapter provides an overview of the animal models available for the study of musculoskeletal infection, the latest advances that are expected to improve them, and some of the most important scientific output achieved using these models.

Dont have a licence yet? Then find out more about our products and how to get one now:

Springer Professional "Wirtschaft+Technik"

Online-Abonnement

Mit Springer Professional "Wirtschaft+Technik" erhalten Sie Zugriff auf:

  • über 102.000 Bücher
  • über 537 Zeitschriften

aus folgenden Fachgebieten:

  • Automobil + Motoren
  • Bauwesen + Immobilien
  • Business IT + Informatik
  • Elektrotechnik + Elektronik
  • Energie + Nachhaltigkeit
  • Finance + Banking
  • Management + Führung
  • Marketing + Vertrieb
  • Maschinenbau + Werkstoffe
  • Versicherung + Risiko

Jetzt Wissensvorsprung sichern!

Springer Professional "Technik"

Online-Abonnement

Mit Springer Professional "Technik" erhalten Sie Zugriff auf:

  • über 67.000 Bücher
  • über 390 Zeitschriften

aus folgenden Fachgebieten:

  • Automobil + Motoren
  • Bauwesen + Immobilien
  • Business IT + Informatik
  • Elektrotechnik + Elektronik
  • Energie + Nachhaltigkeit
  • Maschinenbau + Werkstoffe




 

Jetzt Wissensvorsprung sichern!

Glossary
Implant-related Osteomyelitis
Osteomyelitis occurring associated with an ­implant, most commonly prosthetic joint replacements or fracture fixation devices.
Osteomyelitis
Osteomyelitis is an acute or chronic infection of the bone or bone marrow.
Literature
1.
go back to reference Edwards C, Counsell A, Boulton C, Moran CG. Early infection after hip fracture surgery: risk factors, costs and outcome. J Bone Joint Surg Br. 2008;90(6):770–7.CrossRef Edwards C, Counsell A, Boulton C, Moran CG. Early infection after hip fracture surgery: risk factors, costs and outcome. J Bone Joint Surg Br. 2008;90(6):770–7.CrossRef
2.
go back to reference Schlegel U, Perren SM. Surgical aspects of infection involving osteosynthesis implants: implant design and resistance to local infection. Injury. 2006;37 Suppl 2:S67–73.CrossRef Schlegel U, Perren SM. Surgical aspects of infection involving osteosynthesis implants: implant design and resistance to local infection. Injury. 2006;37 Suppl 2:S67–73.CrossRef
3.
go back to reference Elek SD, Conen PE. The virulence of Staphylococcus pyogenes for man; a study of the problems of wound infection. Br J Exp Pathol. 1957;38(6):573–86. Elek SD, Conen PE. The virulence of Staphylococcus pyogenes for man; a study of the problems of wound infection. Br J Exp Pathol. 1957;38(6):573–86.
4.
5.
go back to reference Egermann M, Goldhahn J, Schneider E. Animal models for fracture treatment in osteoporosis. Osteoporos Int. 2005;16 Suppl 2:S129–38.CrossRef Egermann M, Goldhahn J, Schneider E. Animal models for fracture treatment in osteoporosis. Osteoporos Int. 2005;16 Suppl 2:S129–38.CrossRef
6.
go back to reference Aerssens J, Boonen S, Lowet G, Dequeker J. Interspecies differences in bone composition, density, and quality: potential implications for in vivo bone research. Endocrinology. 1998; 139(2):663–70.CrossRef Aerssens J, Boonen S, Lowet G, Dequeker J. Interspecies differences in bone composition, density, and quality: potential implications for in vivo bone research. Endocrinology. 1998; 139(2):663–70.CrossRef
7.
go back to reference Auer JA, Goodship A, Arnoczky S, Pearce S, Price J, Claes L, et al. Refining animal models in fracture research: seeking consensus in optimising both animal welfare and scientific validity for appropriate biomedical use. BMC Musculoskelet Disord. 2007;8:72.CrossRef Auer JA, Goodship A, Arnoczky S, Pearce S, Price J, Claes L, et al. Refining animal models in fracture research: seeking consensus in optimising both animal welfare and scientific validity for appropriate biomedical use. BMC Musculoskelet Disord. 2007;8:72.CrossRef
8.
go back to reference Patel M, Rojavin Y, Jamali AA, Wasielewski SJ, Salgado CJ. Animal models for the study of osteomyelitis. Semin Plast Surg. 2009;23(2):148–54.CrossRef Patel M, Rojavin Y, Jamali AA, Wasielewski SJ, Salgado CJ. Animal models for the study of osteomyelitis. Semin Plast Surg. 2009;23(2):148–54.CrossRef
9.
go back to reference Wang X, Mabrey JD, Agrawal CM. An interspecies comparison of bone fracture properties. Biomed Mater Eng. 1998;8(1):1–9. Wang X, Mabrey JD, Agrawal CM. An interspecies comparison of bone fracture properties. Biomed Mater Eng. 1998;8(1):1–9.
10.
go back to reference Salgado CJ, Jamali AA, Mardini S, Buchanan K, Veit B. A model for chronic osteomyelitis using Staphylococcus aureus in goats. Clin Orthop Relat Res. 2005;436:246–50.CrossRef Salgado CJ, Jamali AA, Mardini S, Buchanan K, Veit B. A model for chronic osteomyelitis using Staphylococcus aureus in goats. Clin Orthop Relat Res. 2005;436:246–50.CrossRef
11.
go back to reference Arens S, Eijer H, Schlegel U, Printzen G, Perren SM, Hansis M. Influence of the design for fixation implants on local infection: experimental study of dynamic compression plates versus point contact fixators in rabbits. J Orthop Trauma. 1999;13(7):470–6.CrossRef Arens S, Eijer H, Schlegel U, Printzen G, Perren SM, Hansis M. Influence of the design for fixation implants on local infection: experimental study of dynamic compression plates versus point contact fixators in rabbits. J Orthop Trauma. 1999;13(7):470–6.CrossRef
12.
go back to reference Claes L, Eckert-Hubner K, Augat P. The effect of mechanical stability on local vascularization and tissue differentiation in callus healing. J Orthop Res. 2002;20:1099–105.CrossRef Claes L, Eckert-Hubner K, Augat P. The effect of mechanical stability on local vascularization and tissue differentiation in callus healing. J Orthop Res. 2002;20:1099–105.CrossRef
13.
go back to reference An YH, Friedman RJ. Animal models of orthopedic implant infection. J Invest Surg. 1998;11(2):139–46.CrossRef An YH, Friedman RJ. Animal models of orthopedic implant infection. J Invest Surg. 1998;11(2):139–46.CrossRef
14.
go back to reference An YH, Kang QK, Arciola CR. Animal models of osteomyelitis. Int J Artif Organs. 2006; 29(4):407–20. An YH, Kang QK, Arciola CR. Animal models of osteomyelitis. Int J Artif Organs. 2006; 29(4):407–20.
15.
go back to reference Norden CW. Lessons learned from animal models of osteomyelitis. Rev Infect Dis. 1988; 10(1):103–10.CrossRef Norden CW. Lessons learned from animal models of osteomyelitis. Rev Infect Dis. 1988; 10(1):103–10.CrossRef
16.
go back to reference Garcia P, Holstein J, Histing T, Burkhardt M, Culemann U, Pizanis A, et al. A new technique for internal fixation of femoral fractures in mice: impact of stability on fracture healing. J Biomech. 2008;41:1689–96.CrossRef Garcia P, Holstein J, Histing T, Burkhardt M, Culemann U, Pizanis A, et al. A new technique for internal fixation of femoral fractures in mice: impact of stability on fracture healing. J Biomech. 2008;41:1689–96.CrossRef
17.
go back to reference Matthys R, Perren S. Internal fixator for use in the mouse. Injury. 2009;40:S103–9.CrossRef Matthys R, Perren S. Internal fixator for use in the mouse. Injury. 2009;40:S103–9.CrossRef
18.
go back to reference Histing T, Garcia P, Matthys R, Leidinger M, Holstein J, Kristen A, et al. An internal locking plate to study intramembranous bone healing in a mouse femur fracture model. J Orthop Res. 2010;28(3):397–402. Histing T, Garcia P, Matthys R, Leidinger M, Holstein J, Kristen A, et al. An internal locking plate to study intramembranous bone healing in a mouse femur fracture model. J Orthop Res. 2010;28(3):397–402.
19.
go back to reference Legrand N, Ploss A, Balling R, Becker PD, Borsotti C, Brezillon N, et al. Humanized mice for modeling human infectious disease: challenges, progress, and outlook. Cell Host Microbe. 2009;6(1):5–9.CrossRef Legrand N, Ploss A, Balling R, Becker PD, Borsotti C, Brezillon N, et al. Humanized mice for modeling human infectious disease: challenges, progress, and outlook. Cell Host Microbe. 2009;6(1):5–9.CrossRef
20.
go back to reference Shultz LD, Ishikawa F, Greiner DL. Humanized mice in translational biomedical research. Nat Rev Immunol. 2007;7(2):118–30.CrossRef Shultz LD, Ishikawa F, Greiner DL. Humanized mice in translational biomedical research. Nat Rev Immunol. 2007;7(2):118–30.CrossRef
21.
go back to reference Scheman L, Janota M, Lewin P. The production of experimental osteomyelitis. JAMA. 1941;117(18):1525–9.CrossRef Scheman L, Janota M, Lewin P. The production of experimental osteomyelitis. JAMA. 1941;117(18):1525–9.CrossRef
22.
go back to reference Norden CW. Experimental osteomyelitis. I. A description of the model. J Infect Dis. 1970;122(5):410–8.CrossRef Norden CW. Experimental osteomyelitis. I. A description of the model. J Infect Dis. 1970;122(5):410–8.CrossRef
23.
go back to reference Rissing JP, Buxton TB, Weinstein RS, Shockley RK. Model of experimental chronic osteomyelitis in rats. Infect Immun. 1985;47(3):581–6. Rissing JP, Buxton TB, Weinstein RS, Shockley RK. Model of experimental chronic osteomyelitis in rats. Infect Immun. 1985;47(3):581–6.
24.
go back to reference Southwood LL, Frisbie DD, Kawcak CE, Ghivizzani SC, Evans CH, McIlwraith CW. Evaluation of Ad-BMP-2 for enhancing fracture healing in an infected defect fracture rabbit model. J Orthop Res. 2004;22(1):66–72.CrossRef Southwood LL, Frisbie DD, Kawcak CE, Ghivizzani SC, Evans CH, McIlwraith CW. Evaluation of Ad-BMP-2 for enhancing fracture healing in an infected defect fracture rabbit model. J Orthop Res. 2004;22(1):66–72.CrossRef
25.
go back to reference Volk A, Cremieux AC, Belmatoug N, Vallois JM, Pocidalo JJ, Carbon C. Evaluation of a rabbit model for osteomyelitis by high field, high resolution imaging using the chemical-shift-specific-slice-selection technique. Magn Reson Imaging. 1994;12(7):1039–46.CrossRef Volk A, Cremieux AC, Belmatoug N, Vallois JM, Pocidalo JJ, Carbon C. Evaluation of a rabbit model for osteomyelitis by high field, high resolution imaging using the chemical-shift-specific-slice-selection technique. Magn Reson Imaging. 1994;12(7):1039–46.CrossRef
26.
go back to reference Smeltzer MS, Thomas JR, Hickmon SG, Skinner RA, Nelson CL, Griffith D, et al. Characterization of a rabbit model of staphylococcal osteomyelitis. J Orthop Res. 1997; 15(3):414–21.CrossRef Smeltzer MS, Thomas JR, Hickmon SG, Skinner RA, Nelson CL, Griffith D, et al. Characterization of a rabbit model of staphylococcal osteomyelitis. J Orthop Res. 1997; 15(3):414–21.CrossRef
27.
go back to reference Andriole VT, Nagel DA, Southwick WO. A paradigm for human chronic osteomyelitis. J Bone Joint Surg Am. 1973;55(7):1511–5. Andriole VT, Nagel DA, Southwick WO. A paradigm for human chronic osteomyelitis. J Bone Joint Surg Am. 1973;55(7):1511–5.
28.
go back to reference Petty W, Spanier S, Shuster JJ, Silverthorne C. The influence of skeletal implants on incidence of infection. Experiments in a canine model. J Bone Joint Surg Am. 1985;67(8):1236–44. Petty W, Spanier S, Shuster JJ, Silverthorne C. The influence of skeletal implants on incidence of infection. Experiments in a canine model. J Bone Joint Surg Am. 1985;67(8):1236–44.
29.
go back to reference Cordero J, Munuera L, Folgueira MD. Influence of metal implants on infection. An experimental study in rabbits. J Bone Joint Surg Br. 1994;76(5):717–20. Cordero J, Munuera L, Folgueira MD. Influence of metal implants on infection. An experimental study in rabbits. J Bone Joint Surg Br. 1994;76(5):717–20.
30.
go back to reference Arens S, Schlegel U, Printzen G, Ziegler WJ, Perren SM, Hansis M. Influence of materials for fixation implants on local infection. An experimental study of steel versus titanium DCP in rabbits. J Bone Joint Surg Br. 1996;78(4):647–51. Arens S, Schlegel U, Printzen G, Ziegler WJ, Perren SM, Hansis M. Influence of materials for fixation implants on local infection. An experimental study of steel versus titanium DCP in rabbits. J Bone Joint Surg Br. 1996;78(4):647–51.
31.
go back to reference Moriarty TF, Debefve L, Boure L, Campoccia D, Schlegel U, Richards RG. Influence of material and microtopography on the development of local infection in vivo: experimental investigation in rabbits. Int J Artif Organs. 2009;32(9):663–70. Moriarty TF, Debefve L, Boure L, Campoccia D, Schlegel U, Richards RG. Influence of material and microtopography on the development of local infection in vivo: experimental investigation in rabbits. Int J Artif Organs. 2009;32(9):663–70.
32.
go back to reference Moriarty TF, Schlegel U, Perren S, Richards RG. Infection in fracture fixation: can we influence infection rates through implant design? J Mater Sci Mater Med. 2010;21(3):1031–5.CrossRef Moriarty TF, Schlegel U, Perren S, Richards RG. Infection in fracture fixation: can we influence infection rates through implant design? J Mater Sci Mater Med. 2010;21(3):1031–5.CrossRef
33.
go back to reference Melcher GA, Claudi B, Schlegel U, Perren SM, Printzen G, Munzinger J. Influence of type of medullary nail on the development of local infection. An experimental study of solid and slotted nails in rabbits. J Bone Joint Surg Br. 1994;76(6):955–9. Melcher GA, Claudi B, Schlegel U, Perren SM, Printzen G, Munzinger J. Influence of type of medullary nail on the development of local infection. An experimental study of solid and slotted nails in rabbits. J Bone Joint Surg Br. 1994;76(6):955–9.
34.
go back to reference Melcher GA, Metzdorf A, Schlegel U, Ziegler WJ, Perren SM, Printzen G. Influence of reaming versus nonreaming in intramedullary nailing on local infection rate: experimental investigation in rabbits. J Trauma. 1995;39(6):1123–8.CrossRef Melcher GA, Metzdorf A, Schlegel U, Ziegler WJ, Perren SM, Printzen G. Influence of reaming versus nonreaming in intramedullary nailing on local infection rate: experimental investigation in rabbits. J Trauma. 1995;39(6):1123–8.CrossRef
35.
go back to reference Melcher GA, Hauke C, Metzdorf A, Perren SM, Printzen G, Schlegel U, et al. Infection after intramedullary nailing: an experimental investigation on rabbits. Injury. 1996;27 Suppl 3:SC23–6. Melcher GA, Hauke C, Metzdorf A, Perren SM, Printzen G, Schlegel U, et al. Infection after intramedullary nailing: an experimental investigation on rabbits. Injury. 1996;27 Suppl 3:SC23–6.
36.
go back to reference Horn J, Schlegel U, Krettek C, Ito K. Infection resistance of unreamed solid, hollow slotted and cannulated intramedullary nails: an in-vivo experimental comparison. J Orthop Res. 2005;23(4):810–5.CrossRef Horn J, Schlegel U, Krettek C, Ito K. Infection resistance of unreamed solid, hollow slotted and cannulated intramedullary nails: an in-vivo experimental comparison. J Orthop Res. 2005;23(4):810–5.CrossRef
37.
go back to reference Finkemeier CG, Schmidt AH, Kyle RF, Templeman DC, Varecka TF. A prospective, randomized study of intramedullary nails inserted with and without reaming for the treatment of open and closed fractures of the tibial shaft. J Orthop Trauma. 2000;14(3):187–93.CrossRef Finkemeier CG, Schmidt AH, Kyle RF, Templeman DC, Varecka TF. A prospective, randomized study of intramedullary nails inserted with and without reaming for the treatment of open and closed fractures of the tibial shaft. J Orthop Trauma. 2000;14(3):187–93.CrossRef
38.
go back to reference Larsen LB, Madsen JE, Hoiness PR, Ovre S. Should insertion of intramedullary nails for tibial fractures be with or without reaming? A prospective, randomized study with 3.8 years’ follow-up. J Orthop Trauma. 2004;18(3):144–9.CrossRef Larsen LB, Madsen JE, Hoiness PR, Ovre S. Should insertion of intramedullary nails for tibial fractures be with or without reaming? A prospective, randomized study with 3.8 years’ follow-up. J Orthop Trauma. 2004;18(3):144–9.CrossRef
39.
go back to reference Hendricks KJ, Burd TA, Anglen JO, Simpson AW, Christensen GD, Gainor BJ. Synergy between Staphylococcus aureus and Pseudomonas aeruginosa in a rat model of complex orthopaedic wounds. J Bone Joint Surg Am. 2001;83-A(6):855–61. Hendricks KJ, Burd TA, Anglen JO, Simpson AW, Christensen GD, Gainor BJ. Synergy between Staphylococcus aureus and Pseudomonas aeruginosa in a rat model of complex orthopaedic wounds. J Bone Joint Surg Am. 2001;83-A(6):855–61.
40.
go back to reference Deysine M, Rosario E, Isenberg HD. Acute hematogenous osteomyelitis: an experimental model. Surgery. 1976;79(1):97–9. Deysine M, Rosario E, Isenberg HD. Acute hematogenous osteomyelitis: an experimental model. Surgery. 1976;79(1):97–9.
41.
go back to reference Emslie KR, Nade S. Pathogenesis and treatment of acute hematogenous osteomyelitis: evaluation of current views with reference to an animal model. Rev Infect Dis. 1986;8(6):841–9.CrossRef Emslie KR, Nade S. Pathogenesis and treatment of acute hematogenous osteomyelitis: evaluation of current views with reference to an animal model. Rev Infect Dis. 1986;8(6):841–9.CrossRef
42.
go back to reference Poultsides LA, Papatheodorou LK, Karachalios TS, Khaldi L, Maniatis A, Petinaki E, et al. Novel model for studying hematogenous infection in an experimental setting of implant-related infection by a community-acquired methicillin-resistant S. aureus strain. J Orthop Res. 2008;26(10):1355–62.CrossRef Poultsides LA, Papatheodorou LK, Karachalios TS, Khaldi L, Maniatis A, Petinaki E, et al. Novel model for studying hematogenous infection in an experimental setting of implant-related infection by a community-acquired methicillin-resistant S. aureus strain. J Orthop Res. 2008;26(10):1355–62.CrossRef
43.
go back to reference Hienz SA, Sakamoto H, Flock JI, Morner AC, Reinholt FP, Heimdahl A, et al. Development and characterization of a new model of hematogenous osteomyelitis in the rat. J Infect Dis. 1995;171(5):1230–6.CrossRef Hienz SA, Sakamoto H, Flock JI, Morner AC, Reinholt FP, Heimdahl A, et al. Development and characterization of a new model of hematogenous osteomyelitis in the rat. J Infect Dis. 1995;171(5):1230–6.CrossRef
44.
go back to reference Whalen JL, Fitzgerald Jr RH, Morrissy RT. A histological study of acute hematogenous osteomyelitis following physeal injuries in rabbits. J Bone Joint Surg Am. 1988;70(9):1383–92. Whalen JL, Fitzgerald Jr RH, Morrissy RT. A histological study of acute hematogenous osteomyelitis following physeal injuries in rabbits. J Bone Joint Surg Am. 1988;70(9):1383–92.
45.
go back to reference Chadha HS, Fitzgerald Jr RH, Wiater P, Sud S, Nasser S, Wooley PH. Experimental acute hematogenous osteomyelitis in mice. I. Histopathological and immunological findings. J Orthop Res. 1999;17(3):376–81.CrossRef Chadha HS, Fitzgerald Jr RH, Wiater P, Sud S, Nasser S, Wooley PH. Experimental acute hematogenous osteomyelitis in mice. I. Histopathological and immunological findings. J Orthop Res. 1999;17(3):376–81.CrossRef
46.
go back to reference Patzakis MJ, Wilkins J. Factors influencing infection rate in open fracture wounds. Clin Orthop Relat Res. 1989;243:36–40. Patzakis MJ, Wilkins J. Factors influencing infection rate in open fracture wounds. Clin Orthop Relat Res. 1989;243:36–40.
47.
go back to reference Zimmerli W, Trampuz A, Ochsner PE. Prosthetic-joint infections. N Engl J Med. 2004;351 (16):1645–54.CrossRef Zimmerli W, Trampuz A, Ochsner PE. Prosthetic-joint infections. N Engl J Med. 2004;351 (16):1645–54.CrossRef
48.
go back to reference Trampuz A, Zimmerli W. Diagnosis and treatment of infections associated with fracture-fixation devices. Injury. 2006;37 Suppl 2:S59–66.CrossRef Trampuz A, Zimmerli W. Diagnosis and treatment of infections associated with fracture-fixation devices. Injury. 2006;37 Suppl 2:S59–66.CrossRef
49.
go back to reference Bowen TR, Widmaier JC. Host classification predicts infection after open fracture. Clin Orthop Relat Res. 2005;433:205–11.CrossRef Bowen TR, Widmaier JC. Host classification predicts infection after open fracture. Clin Orthop Relat Res. 2005;433:205–11.CrossRef
50.
go back to reference Dumont C, Kauer F, Bohr S, Schmidtmann U, Knopp W, Engelhardt T, et al. Long-term effects of saw osteotomy versus random fracturing on bone healing and remodeling in a sheep tibia model. J Orthop Res. 2009;27(5):680–6.CrossRef Dumont C, Kauer F, Bohr S, Schmidtmann U, Knopp W, Engelhardt T, et al. Long-term effects of saw osteotomy versus random fracturing on bone healing and remodeling in a sheep tibia model. J Orthop Res. 2009;27(5):680–6.CrossRef
51.
go back to reference Ashhurst DE, Hogg J, Perren SM. A method for making reproducible experimental fractures of the rabbit tibia. Injury. 1982;14(3):236–42.CrossRef Ashhurst DE, Hogg J, Perren SM. A method for making reproducible experimental fractures of the rabbit tibia. Injury. 1982;14(3):236–42.CrossRef
52.
go back to reference Jackson RW, Reed CA, Israel JA, Abou-Keer FK, Garside H. Production of a standard experimental fracture. Can J Surg. 1970;13(4):415–20. Jackson RW, Reed CA, Israel JA, Abou-Keer FK, Garside H. Production of a standard experimental fracture. Can J Surg. 1970;13(4):415–20.
53.
go back to reference Bonnarens F, Einhorn TA. Production of a standard closed fracture in laboratory animal bone. J Orthop Res. 1984;2(1):97–101.CrossRef Bonnarens F, Einhorn TA. Production of a standard closed fracture in laboratory animal bone. J Orthop Res. 1984;2(1):97–101.CrossRef
54.
go back to reference Marturano JE, Cleveland BC, Byrne MA, O’Connell SL, Wixted JJ, Billiar KL. An improved murine femur fracture device for bone healing studies. J Biomech. 2008;41(6):1222–8.CrossRef Marturano JE, Cleveland BC, Byrne MA, O’Connell SL, Wixted JJ, Billiar KL. An improved murine femur fracture device for bone healing studies. J Biomech. 2008;41(6):1222–8.CrossRef
55.
go back to reference Gustilo RB, Anderson JT. Prevention of infection in the treatment of one thousand and twenty-five open fractures of long bones: retrospective and prospective analyses. J Bone Joint Surg Am. 1976;58(4):453–8. Gustilo RB, Anderson JT. Prevention of infection in the treatment of one thousand and twenty-five open fractures of long bones: retrospective and prospective analyses. J Bone Joint Surg Am. 1976;58(4):453–8.
56.
go back to reference Landry P, Marino A, Sadasivan K, Albright J. Effect of soft-tissue trauma on the early periosteal response of bone to injury. J Trauma. 2000;48(3):479.CrossRef Landry P, Marino A, Sadasivan K, Albright J. Effect of soft-tissue trauma on the early periosteal response of bone to injury. J Trauma. 2000;48(3):479.CrossRef
57.
go back to reference Li BC, Zhang JJ, Xu C, Zhang LC, Kang JY, Zhao H. Treatment of rabbit femoral defect by firearm with BMP-4 gene combined with TGF-beta1. J Trauma. 2009;66(2):450–6.CrossRef Li BC, Zhang JJ, Xu C, Zhang LC, Kang JY, Zhao H. Treatment of rabbit femoral defect by firearm with BMP-4 gene combined with TGF-beta1. J Trauma. 2009;66(2):450–6.CrossRef
58.
go back to reference Utvag S, Grundnes O, Rindal D, Reikeras O. Influence of extensive muscle injury on fracture healing in rat tibia. J Orthop Trauma. 2003;17(6):430–5.CrossRef Utvag S, Grundnes O, Rindal D, Reikeras O. Influence of extensive muscle injury on fracture healing in rat tibia. J Orthop Trauma. 2003;17(6):430–5.CrossRef
59.
go back to reference Claes L, Maurer-Klein N, Henke T, Gerngross H, Melnyk M, Augat P. Moderate soft tissue trauma delays new bone formation only in the early phase of fracture healing. J Orthop Res. 2006;24(6):1178–85.CrossRef Claes L, Maurer-Klein N, Henke T, Gerngross H, Melnyk M, Augat P. Moderate soft tissue trauma delays new bone formation only in the early phase of fracture healing. J Orthop Res. 2006;24(6):1178–85.CrossRef
60.
go back to reference Melnyk M, Henke T, Claes L, Augat P. Revascularisation during fracture healing with soft tissue injury. Arch Orthop Trauma Surg. 2008;128:1159–65.CrossRef Melnyk M, Henke T, Claes L, Augat P. Revascularisation during fracture healing with soft tissue injury. Arch Orthop Trauma Surg. 2008;128:1159–65.CrossRef
61.
go back to reference Kälicke T, Schlegel U, Printzen G, Schneider E, Muhr G, Arens S. Influence of a standardized closed soft tissue trauma on resistance to local infection. An experimental study in rats. J Orthop Res. 2003;21(2):373–8.CrossRef Kälicke T, Schlegel U, Printzen G, Schneider E, Muhr G, Arens S. Influence of a standardized closed soft tissue trauma on resistance to local infection. An experimental study in rats. J Orthop Res. 2003;21(2):373–8.CrossRef
62.
go back to reference Matsumoto T, Hardaway III RM, Dobek AS, Noyes HE. Antibiotic topical spray applied in a simulated combat wound. Arch Surg. 1967;95(2):288–94.CrossRef Matsumoto T, Hardaway III RM, Dobek AS, Noyes HE. Antibiotic topical spray applied in a simulated combat wound. Arch Surg. 1967;95(2):288–94.CrossRef
63.
go back to reference Passl R, Muller C, Zielinski CC, Eibl MM. A model of experimental post-traumatic osteomyelitis in guinea pigs. J Trauma. 1984;24(4):323–6.CrossRef Passl R, Muller C, Zielinski CC, Eibl MM. A model of experimental post-traumatic osteomyelitis in guinea pigs. J Trauma. 1984;24(4):323–6.CrossRef
64.
go back to reference Rittman WW, Perren S. Cortical bone healing after internal fixation and fracture. New York: Springer; 1974.CrossRef Rittman WW, Perren S. Cortical bone healing after internal fixation and fracture. New York: Springer; 1974.CrossRef
65.
go back to reference Worlock P, Slack R, Harvey L, Mawhinney R. An experimental model of post-traumatic osteomyelitis in rabbits. Br J Exp Pathol. 1988;69(2):235–44. Worlock P, Slack R, Harvey L, Mawhinney R. An experimental model of post-traumatic osteomyelitis in rabbits. Br J Exp Pathol. 1988;69(2):235–44.
66.
go back to reference Worlock P, Slack R, Harvey L, Mawhinney R. The prevention of infection in open fractures: an experimental study of the effect of fracture stability. Injury. 1994;25(1):31–8.CrossRef Worlock P, Slack R, Harvey L, Mawhinney R. The prevention of infection in open fractures: an experimental study of the effect of fracture stability. Injury. 1994;25(1):31–8.CrossRef
67.
go back to reference Hamel A, Caillon J, Jacqueline C, Rogez JM, Potel G. Internal device decreases antibiotic’s efficacy on experimental osteomyelitis. J Child Orthop. 2008;2(3):239–43.CrossRef Hamel A, Caillon J, Jacqueline C, Rogez JM, Potel G. Internal device decreases antibiotic’s efficacy on experimental osteomyelitis. J Child Orthop. 2008;2(3):239–43.CrossRef
68.
go back to reference Curtis MJ, Brown PR, Dick JD, Jinnah RH. Contaminated fractures of the tibia: a comparison of treatment modalities in an animal model. J Orthop Res. 1995;13(2):286–95.CrossRef Curtis MJ, Brown PR, Dick JD, Jinnah RH. Contaminated fractures of the tibia: a comparison of treatment modalities in an animal model. J Orthop Res. 1995;13(2):286–95.CrossRef
69.
go back to reference Hill PF, Clasper JC, Parker SJ, Watkins PE. Early intramedullary nailing in an animal model of a heavily contaminated fracture of the tibia. J Orthop Res. 2002;20(4):648–53.CrossRef Hill PF, Clasper JC, Parker SJ, Watkins PE. Early intramedullary nailing in an animal model of a heavily contaminated fracture of the tibia. J Orthop Res. 2002;20(4):648–53.CrossRef
70.
go back to reference Lindsey BA, Clovis NB, Smith ES, Salihu S, Hubbard DF. An animal model for open femur fracture and osteomyelitis: part I. J Orthop Res. 2010;28(1):38–42. Lindsey BA, Clovis NB, Smith ES, Salihu S, Hubbard DF. An animal model for open femur fracture and osteomyelitis: part I. J Orthop Res. 2010;28(1):38–42.
71.
go back to reference Chen X, Tsukayama DT, Kidder LS, Bourgeault CA, Schmidt AH, Lew WD. Characterization of a chronic infection in an internally-stabilized segmental defect in the rat femur. J Orthop Res. 2005;23(4):816–23.CrossRef Chen X, Tsukayama DT, Kidder LS, Bourgeault CA, Schmidt AH, Lew WD. Characterization of a chronic infection in an internally-stabilized segmental defect in the rat femur. J Orthop Res. 2005;23(4):816–23.CrossRef
72.
go back to reference Chen X, Schmidt AH, Mahjouri S, Polly Jr DW, Lew WD. Union of a chronically infected internally stabilized segmental defect in the rat femur after debridement and application of rhBMP-2 and systemic antibiotic. J Orthop Trauma. 2007;21(10):693–700.CrossRef Chen X, Schmidt AH, Mahjouri S, Polly Jr DW, Lew WD. Union of a chronically infected internally stabilized segmental defect in the rat femur after debridement and application of rhBMP-2 and systemic antibiotic. J Orthop Trauma. 2007;21(10):693–700.CrossRef
73.
go back to reference Chen X, Kidder LS, Lew WD. Osteogenic protein-1 induced bone formation in an infected segmental defect in the rat femur. J Orthop Res. 2002;20(1):142–50.CrossRef Chen X, Kidder LS, Lew WD. Osteogenic protein-1 induced bone formation in an infected segmental defect in the rat femur. J Orthop Res. 2002;20(1):142–50.CrossRef
74.
go back to reference Stewart RL, Cox JT, Volgas D, Stannard J, Duffy L, Waites KB, et al. The use of a biodegradable, load-bearing scaffold as a carrier for antibiotics in an infected open fracture model. J Orthop Trauma. 2010;24(9):587–91.CrossRef Stewart RL, Cox JT, Volgas D, Stannard J, Duffy L, Waites KB, et al. The use of a biodegradable, load-bearing scaffold as a carrier for antibiotics in an infected open fracture model. J Orthop Trauma. 2010;24(9):587–91.CrossRef
75.
go back to reference Holstein J, Garcia P, Histing T, Kristen A, Scheuer C, Menger M, et al. Advances in the establishment of defined mouse models for the study of fracture healing and bone regeneration. J Orthop Trauma. 2009;23:S31.CrossRef Holstein J, Garcia P, Histing T, Kristen A, Scheuer C, Menger M, et al. Advances in the establishment of defined mouse models for the study of fracture healing and bone regeneration. J Orthop Trauma. 2009;23:S31.CrossRef
76.
go back to reference Frommelt L. Principles of systemic antimicrobial therapy in foreign material associated infection in bone tissue, with special focus on periprosthetic infection. Injury. 2006;37 Suppl 2:S87–94.CrossRef Frommelt L. Principles of systemic antimicrobial therapy in foreign material associated infection in bone tissue, with special focus on periprosthetic infection. Injury. 2006;37 Suppl 2:S87–94.CrossRef
77.
go back to reference Norden CW. Experimental osteomyelitis. IV. Therapeutic trials with rifampin alone and in combination with gentamicin, sisomicin, and cephalothin. J Infect Dis. 1975;132(5):493–9.CrossRef Norden CW. Experimental osteomyelitis. IV. Therapeutic trials with rifampin alone and in combination with gentamicin, sisomicin, and cephalothin. J Infect Dis. 1975;132(5):493–9.CrossRef
78.
go back to reference Espehaug B, Engesaeter LB, Vollset SE, Havelin LI, Langeland N. Antibiotic prophylaxis in total hip arthroplasty. Review of 10,905 primary cemented total hip replacements reported to the Norwegian arthroplasty register, 1987 to 1995. J Bone Joint Surg Br. 1997;79(4):590–5.CrossRef Espehaug B, Engesaeter LB, Vollset SE, Havelin LI, Langeland N. Antibiotic prophylaxis in total hip arthroplasty. Review of 10,905 primary cemented total hip replacements reported to the Norwegian arthroplasty register, 1987 to 1995. J Bone Joint Surg Br. 1997;79(4):590–5.CrossRef
79.
go back to reference Rodeheaver GT, Rukstalis D, Bono M, Bellamy W. A new model of bone infection used to evaluate the efficacy of antibiotic-impregnated polymethylmethacrylate cement. Clin Orthop Relat Res. 1983;178:303–11. Rodeheaver GT, Rukstalis D, Bono M, Bellamy W. A new model of bone infection used to evaluate the efficacy of antibiotic-impregnated polymethylmethacrylate cement. Clin Orthop Relat Res. 1983;178:303–11.
80.
go back to reference Evans RP, Nelson CL. Gentamicin-impregnated polymethylmethacrylate beads compared with systemic antibiotic therapy in the treatment of chronic osteomyelitis. Clin Orthop Relat Res. 1993;295:37–42. Evans RP, Nelson CL. Gentamicin-impregnated polymethylmethacrylate beads compared with systemic antibiotic therapy in the treatment of chronic osteomyelitis. Clin Orthop Relat Res. 1993;295:37–42.
81.
go back to reference Riegels-Nielsen P, Espersen F, Holmich LR, Frimodt-Moller N. Collagen with gentamicin for prophylaxis of postoperative infection. Staphylococcus aureus osteomyelitis studied in rabbits. Acta Orthop Scand. 1995;66(1):69–72.CrossRef Riegels-Nielsen P, Espersen F, Holmich LR, Frimodt-Moller N. Collagen with gentamicin for prophylaxis of postoperative infection. Staphylococcus aureus osteomyelitis studied in rabbits. Acta Orthop Scand. 1995;66(1):69–72.CrossRef
82.
go back to reference Beardmore AA, Brooks DE, Wenke JC, Thomas DB. Effectiveness of local antibiotic delivery with an osteoinductive and osteoconductive bone-graft substitute. J Bone Joint Surg Am. 2005;87(1):107–12.CrossRef Beardmore AA, Brooks DE, Wenke JC, Thomas DB. Effectiveness of local antibiotic delivery with an osteoinductive and osteoconductive bone-graft substitute. J Bone Joint Surg Am. 2005;87(1):107–12.CrossRef
83.
go back to reference Aimin C, Chunlin H, Juliang B, Tinyin Z, Zhichao D. Antibiotic loaded chitosan bar. An in vitro, in vivo study of a possible treatment for osteomyelitis. Clin Orthop Relat Res. 1999;366:239–47.CrossRef Aimin C, Chunlin H, Juliang B, Tinyin Z, Zhichao D. Antibiotic loaded chitosan bar. An in vitro, in vivo study of a possible treatment for osteomyelitis. Clin Orthop Relat Res. 1999;366:239–47.CrossRef
84.
go back to reference Huneault LM, Lussier B, Dubreuil P, Chouinard L, Desevaux C. Prevention and treatment of experimental osteomyelitis in dogs with ciprofloxacin-loaded crosslinked high amylose starch implants. J Orthop Res. 2004;22(6):1351–7.CrossRef Huneault LM, Lussier B, Dubreuil P, Chouinard L, Desevaux C. Prevention and treatment of experimental osteomyelitis in dogs with ciprofloxacin-loaded crosslinked high amylose starch implants. J Orthop Res. 2004;22(6):1351–7.CrossRef
85.
go back to reference Diefenbeck M, Mückley T, Hofmann GO. Prophylaxis and treatment of implant-related infections by local application of antibiotics. Injury. 2006;37 Suppl 2:S95–104.CrossRef Diefenbeck M, Mückley T, Hofmann GO. Prophylaxis and treatment of implant-related infections by local application of antibiotics. Injury. 2006;37 Suppl 2:S95–104.CrossRef
86.
go back to reference Ueng SW, Yuan LJ, Lee N, Lin SS, Chan EC, Weng JH. In vivo study of biodegradable alginate antibiotic beads in rabbits. J Orthop Res. 2004;22(3):592–9.CrossRef Ueng SW, Yuan LJ, Lee N, Lin SS, Chan EC, Weng JH. In vivo study of biodegradable alginate antibiotic beads in rabbits. J Orthop Res. 2004;22(3):592–9.CrossRef
87.
go back to reference Ambrose CG, Clyburn TA, Louden K, Joseph J, Wright J, Gulati P, et al. Effective treatment of osteomyelitis with biodegradable microspheres in a rabbit model. Clin Orthop Relat Res. 2004;421:293–9.CrossRef Ambrose CG, Clyburn TA, Louden K, Joseph J, Wright J, Gulati P, et al. Effective treatment of osteomyelitis with biodegradable microspheres in a rabbit model. Clin Orthop Relat Res. 2004;421:293–9.CrossRef
88.
go back to reference Li D, Gromov K, Soballe K, Puzas JE, O’Keefe RJ, Awad H, et al. Quantitative mouse model of implant-associated osteomyelitis and the kinetics of microbial growth, osteolysis, and humoral immunity. J Orthop Res. 2008;26(1):96–105.CrossRef Li D, Gromov K, Soballe K, Puzas JE, O’Keefe RJ, Awad H, et al. Quantitative mouse model of implant-associated osteomyelitis and the kinetics of microbial growth, osteolysis, and humoral immunity. J Orthop Res. 2008;26(1):96–105.CrossRef
89.
go back to reference Antoci Jr V, Adams CS, Hickok NJ, Shapiro IM, Parvizi J. Vancomycin bound to Ti rods reduces periprosthetic infection: preliminary study. Clin Orthop Relat Res. 2007;461:88–95. Antoci Jr V, Adams CS, Hickok NJ, Shapiro IM, Parvizi J. Vancomycin bound to Ti rods reduces periprosthetic infection: preliminary study. Clin Orthop Relat Res. 2007;461:88–95.
90.
go back to reference Lucke M, Schmidmaier G, Sadoni S, Wildemann B, Schiller R, Haas NP, et al. Gentamicin coating of metallic implants reduces implant-related osteomyelitis in rats. Bone. 2003; 32(5):521–31.CrossRef Lucke M, Schmidmaier G, Sadoni S, Wildemann B, Schiller R, Haas NP, et al. Gentamicin coating of metallic implants reduces implant-related osteomyelitis in rats. Bone. 2003; 32(5):521–31.CrossRef
91.
go back to reference Strobel C, Schmidmaier G, Wildemann B. Changing the release kinetics of gentamicin from poly(d, l-lactide) implant coatings using only one polymer. Int J Artif Organs. 2011; 34(3):304–16.CrossRef Strobel C, Schmidmaier G, Wildemann B. Changing the release kinetics of gentamicin from poly(d, l-lactide) implant coatings using only one polymer. Int J Artif Organs. 2011; 34(3):304–16.CrossRef
92.
go back to reference Schmidmaier G, Lucke M, Wildemann B, Haas N, Raschke M. Prophylaxis and treatment of implant-related infections by antibiotic-coated implants: a review. Injury. 2006;37(2):S105–12.CrossRef Schmidmaier G, Lucke M, Wildemann B, Haas N, Raschke M. Prophylaxis and treatment of implant-related infections by antibiotic-coated implants: a review. Injury. 2006;37(2):S105–12.CrossRef
93.
go back to reference Fuchs T, Stange R, Schmidmaier G, Raschke MJ. The use of gentamicin-coated nails in the tibia: preliminary results of a prospective study. Arch Orthop Trauma Surg. 2011;131(10):1419–25.CrossRef Fuchs T, Stange R, Schmidmaier G, Raschke MJ. The use of gentamicin-coated nails in the tibia: preliminary results of a prospective study. Arch Orthop Trauma Surg. 2011;131(10):1419–25.CrossRef
94.
go back to reference Darouiche RO, Farmer J, Chaput C, Mansouri M, Saleh G, Landon GC. Anti-infective efficacy of antiseptic-coated intramedullary nails. J Bone Joint Surg Am. 1998;80(9):1336–40. Darouiche RO, Farmer J, Chaput C, Mansouri M, Saleh G, Landon GC. Anti-infective efficacy of antiseptic-coated intramedullary nails. J Bone Joint Surg Am. 1998;80(9):1336–40.
95.
go back to reference Greiner SH, Wildemann B, Back DA, Alidoust M, Schwabe P, Haas NP, et al. Local application of zoledronic acid incorporated in a poly(d, l-lactide)-coated implant accelerates fracture healing in rats. Acta Orthop. 2008;79(5):717–25.CrossRef Greiner SH, Wildemann B, Back DA, Alidoust M, Schwabe P, Haas NP, et al. Local application of zoledronic acid incorporated in a poly(d, l-lactide)-coated implant accelerates fracture healing in rats. Acta Orthop. 2008;79(5):717–25.CrossRef
96.
go back to reference Pauly S, Luttosch F, Morawski M, Haas NP, Schmidmaier G, Wildemann B. Simvastatin locally applied from a biodegradable coating of osteosynthetic implants improves fracture healing comparable to BMP-2 application. Bone. 2009;45(3):505–11.CrossRef Pauly S, Luttosch F, Morawski M, Haas NP, Schmidmaier G, Wildemann B. Simvastatin locally applied from a biodegradable coating of osteosynthetic implants improves fracture healing comparable to BMP-2 application. Bone. 2009;45(3):505–11.CrossRef
97.
go back to reference Moskowitz JS, Blaisse MR, Samuel RE, Hsu HP, Harris MB, Martin SD, et al. The effectiveness of the controlled release of gentamicin from polyelectrolyte multilayers in the treatment of Staphylococcus aureus infection in a rabbit bone model. Biomaterials. 2010;31(23):6019–30.CrossRef Moskowitz JS, Blaisse MR, Samuel RE, Hsu HP, Harris MB, Martin SD, et al. The effectiveness of the controlled release of gentamicin from polyelectrolyte multilayers in the treatment of Staphylococcus aureus infection in a rabbit bone model. Biomaterials. 2010;31(23):6019–30.CrossRef
98.
go back to reference Antoci Jr V, Adams CS, Parvizi J, Davidson HM, Composto RJ, Freeman TA, et al. The inhibition of Staphylococcus epidermidis biofilm formation by vancomycin-modified titanium alloy and implications for the treatment of periprosthetic infection. Biomaterials. 2008;29(35):4684–90.CrossRef Antoci Jr V, Adams CS, Parvizi J, Davidson HM, Composto RJ, Freeman TA, et al. The inhibition of Staphylococcus epidermidis biofilm formation by vancomycin-modified titanium alloy and implications for the treatment of periprosthetic infection. Biomaterials. 2008;29(35):4684–90.CrossRef
99.
go back to reference Baveja JK, Willcox MD, Hume EB, Kumar N, Odell R, Poole-Warren LA. Furanones as potential anti-bacterial coatings on biomaterials. Biomaterials. 2004;25(20):5003–12.CrossRef Baveja JK, Willcox MD, Hume EB, Kumar N, Odell R, Poole-Warren LA. Furanones as potential anti-bacterial coatings on biomaterials. Biomaterials. 2004;25(20):5003–12.CrossRef
100.
go back to reference Lonn-Stensrud J, Landin MA, Benneche T, Petersen FC, Scheie AA. Furanones, potential agents for preventing Staphylococcus epidermidis biofilm infections? J Antimicrob Chemother. 2009;63(2):309–16.CrossRef Lonn-Stensrud J, Landin MA, Benneche T, Petersen FC, Scheie AA. Furanones, potential agents for preventing Staphylococcus epidermidis biofilm infections? J Antimicrob Chemother. 2009;63(2):309–16.CrossRef
101.
go back to reference Cornell CN, Tyndall D, Waller S, Lane JM, Brause BD. Treatment of experimental osteomyelitis with antibiotic-impregnated bone graft substitute. J Orthop Res. 1993;11(5):619–26.CrossRef Cornell CN, Tyndall D, Waller S, Lane JM, Brause BD. Treatment of experimental osteomyelitis with antibiotic-impregnated bone graft substitute. J Orthop Res. 1993;11(5):619–26.CrossRef
102.
go back to reference Giavaresi G, Borsari V, Fini M, Giardino R, Sambri V, Gaibani P, et al. Preliminary investigations on a new gentamicin and vancomycin-coated PMMA nail for the treatment of bone and intramedullary infections: an experimental study in the rabbit. J Orthop Res. 2008;26(6):785–92.CrossRef Giavaresi G, Borsari V, Fini M, Giardino R, Sambri V, Gaibani P, et al. Preliminary investigations on a new gentamicin and vancomycin-coated PMMA nail for the treatment of bone and intramedullary infections: an experimental study in the rabbit. J Orthop Res. 2008;26(6):785–92.CrossRef
103.
go back to reference Shirtliff ME, Calhoun JH, Mader JT. Experimental osteomyelitis treatment with antibiotic-impregnated hydroxyapatite. Clin Orthop Relat Res. 2002;401:239–47.CrossRef Shirtliff ME, Calhoun JH, Mader JT. Experimental osteomyelitis treatment with antibiotic-impregnated hydroxyapatite. Clin Orthop Relat Res. 2002;401:239–47.CrossRef
104.
go back to reference Fitzgerald Jr RH. Experimental osteomyelitis: description of a canine model and the role of depot administration of antibiotics in the prevention and treatment of sepsis. J Bone Joint Surg Am. 1983;65(3):371–80. Fitzgerald Jr RH. Experimental osteomyelitis: description of a canine model and the role of depot administration of antibiotics in the prevention and treatment of sepsis. J Bone Joint Surg Am. 1983;65(3):371–80.
105.
go back to reference Garvin KL, Miyano JA, Robinson D, Giger D, Novak J, Radio S. Polylactide/polyglycolide antibiotic implants in the treatment of osteomyelitis. A canine model. J Bone Joint Surg Am. 1994;76(10):1500–6. Garvin KL, Miyano JA, Robinson D, Giger D, Novak J, Radio S. Polylactide/polyglycolide antibiotic implants in the treatment of osteomyelitis. A canine model. J Bone Joint Surg Am. 1994;76(10):1500–6.
106.
go back to reference Orhan Z, Cevher E, Mulazimoglu L, Gurcan D, Alper M, Araman A, et al. The preparation of ciprofloxacin hydrochloride-loaded chitosan and pectin microspheres: their evaluation in an animal osteomyelitis model. J Bone Joint Surg Br. 2006;88(2):270–5.CrossRef Orhan Z, Cevher E, Mulazimoglu L, Gurcan D, Alper M, Araman A, et al. The preparation of ciprofloxacin hydrochloride-loaded chitosan and pectin microspheres: their evaluation in an animal osteomyelitis model. J Bone Joint Surg Br. 2006;88(2):270–5.CrossRef
107.
go back to reference Del Pozo JL, Rouse MS, Euba G, Kang CI, Mandrekar JN, Steckelberg JM, et al. The electricidal effect is active in an experimental model of Staphylococcus epidermidis chronic foreign body osteomyelitis. Antimicrob Agents Chemother. 2009;53(10):4064–8.CrossRef Del Pozo JL, Rouse MS, Euba G, Kang CI, Mandrekar JN, Steckelberg JM, et al. The electricidal effect is active in an experimental model of Staphylococcus epidermidis chronic foreign body osteomyelitis. Antimicrob Agents Chemother. 2009;53(10):4064–8.CrossRef
108.
go back to reference Isiklar ZU, Darouiche RO, Landon GC, Beck T. Efficacy of antibiotics alone for orthopaedic device related infections. Clin Orthop Relat Res. 1996;332:184–9.CrossRef Isiklar ZU, Darouiche RO, Landon GC, Beck T. Efficacy of antibiotics alone for orthopaedic device related infections. Clin Orthop Relat Res. 1996;332:184–9.CrossRef
109.
go back to reference Monzon M, Garcia-Alvarez F, Lacleriga A, Amorena B. Evaluation of four experimental osteomyelitis infection models by using precolonized implants and bacterial suspensions. Acta Orthop Scand. 2002;73(1):11–9.CrossRef Monzon M, Garcia-Alvarez F, Lacleriga A, Amorena B. Evaluation of four experimental osteomyelitis infection models by using precolonized implants and bacterial suspensions. Acta Orthop Scand. 2002;73(1):11–9.CrossRef
110.
go back to reference Goodhart GL. Mycobacterium fortuitum osteomyelitis following trauma. J Orthop Trauma. 1993;7(2):142–5.CrossRef Goodhart GL. Mycobacterium fortuitum osteomyelitis following trauma. J Orthop Trauma. 1993;7(2):142–5.CrossRef
111.
go back to reference Caricato A, Montini L, Bello G, Michetti V, Maviglia R, Bocci MG, et al. Risk factors and outcome of Acinetobacter baumanii infection in severe trauma patients. Intensive Care Med. 2009;35(11):1964–9.CrossRef Caricato A, Montini L, Bello G, Michetti V, Maviglia R, Bocci MG, et al. Risk factors and outcome of Acinetobacter baumanii infection in severe trauma patients. Intensive Care Med. 2009;35(11):1964–9.CrossRef
112.
go back to reference Glueck DA, Charoglu CP, Lawton JN. Factors associated with infection following open distal radius fractures. Hand (N Y). 2009;4(3):330–4.CrossRef Glueck DA, Charoglu CP, Lawton JN. Factors associated with infection following open distal radius fractures. Hand (N Y). 2009;4(3):330–4.CrossRef
113.
go back to reference Mader JT, Cripps MW, Calhoun JH. Adult posttraumatic osteomyelitis of the tibia. Clin Orthop Relat Res. 1999;360:14–21.CrossRef Mader JT, Cripps MW, Calhoun JH. Adult posttraumatic osteomyelitis of the tibia. Clin Orthop Relat Res. 1999;360:14–21.CrossRef
114.
go back to reference Costerton JW, Post JC, Ehrlich GD, Hu FZ, Kreft R, Nistico L, et al. New methods for the detection of orthopedic and other biofilm infections. FEMS Immunol Med Microbiol. 2011;61(2):133–40.CrossRef Costerton JW, Post JC, Ehrlich GD, Hu FZ, Kreft R, Nistico L, et al. New methods for the detection of orthopedic and other biofilm infections. FEMS Immunol Med Microbiol. 2011;61(2):133–40.CrossRef
115.
go back to reference Cremieux AC, Dumitrescu O, Lina G, Vallee C, Cote JF, Muffat-Joly M, et al. Panton-valentine leukocidin enhances the severity of community-associated methicillin-resistant Staphylococcus aureus rabbit osteomyelitis. PLoS One. 2009;4(9):e7204.CrossRef Cremieux AC, Dumitrescu O, Lina G, Vallee C, Cote JF, Muffat-Joly M, et al. Panton-valentine leukocidin enhances the severity of community-associated methicillin-resistant Staphylococcus aureus rabbit osteomyelitis. PLoS One. 2009;4(9):e7204.CrossRef
116.
go back to reference Daurel C, Prunier AL, Chau F, Garry L, Leclercq R, Fantin B. Role of hypermutability on bacterial fitness and emergence of resistance in experimental osteomyelitis due to Staphylococcus aureus. FEMS Immunol Med Microbiol. 2007;51(2):344–9.CrossRef Daurel C, Prunier AL, Chau F, Garry L, Leclercq R, Fantin B. Role of hypermutability on bacterial fitness and emergence of resistance in experimental osteomyelitis due to Staphylococcus aureus. FEMS Immunol Med Microbiol. 2007;51(2):344–9.CrossRef
117.
go back to reference Elasri MO, Thomas JR, Skinner RA, Blevins JS, Beenken KE, Nelson CL, et al. Staphylococcus aureus collagen adhesin contributes to the pathogenesis of osteomyelitis. Bone. 2002; 30(1):275–80.CrossRef Elasri MO, Thomas JR, Skinner RA, Blevins JS, Beenken KE, Nelson CL, et al. Staphylococcus aureus collagen adhesin contributes to the pathogenesis of osteomyelitis. Bone. 2002; 30(1):275–80.CrossRef
118.
go back to reference Luong TT, Lei MG, Lee CY. Staphylococcus aureus Rbf activates biofilm formation in vitro and promotes virulence in a murine foreign body infection model. Infect Immun. 2009; 77(1):335–40.CrossRef Luong TT, Lei MG, Lee CY. Staphylococcus aureus Rbf activates biofilm formation in vitro and promotes virulence in a murine foreign body infection model. Infect Immun. 2009; 77(1):335–40.CrossRef
119.
go back to reference Patti JM, Bremell T, Krajewska-Pietrasik D, Abdelnour A, Tarkowski A, Ryden C, et al. The Staphylococcus aureus collagen adhesin is a virulence determinant in experimental septic arthritis. Infect Immun. 1994;62(1):152–61. Patti JM, Bremell T, Krajewska-Pietrasik D, Abdelnour A, Tarkowski A, Ryden C, et al. The Staphylococcus aureus collagen adhesin is a virulence determinant in experimental septic arthritis. Infect Immun. 1994;62(1):152–61.
120.
go back to reference Weiss EC, Spencer HJ, Daily SJ, Weiss BD, Smeltzer MS. Impact of sarA on antibiotic susceptibility of Staphylococcus aureus in a catheter-associated in vitro model of biofilm formation. Antimicrob Agents Chemother. 2009;53(6):2475–82.CrossRef Weiss EC, Spencer HJ, Daily SJ, Weiss BD, Smeltzer MS. Impact of sarA on antibiotic susceptibility of Staphylococcus aureus in a catheter-associated in vitro model of biofilm formation. Antimicrob Agents Chemother. 2009;53(6):2475–82.CrossRef
121.
go back to reference Ferguson KP, Lambe Jr DW, Keplinger JL, Kalbfleisch JH. Comparison of the pathogenicity of three species of coagulase-negative Staphylococcus in a mouse model with and without a foreign body. Can J Microbiol. 1991;37(9):722–4.CrossRef Ferguson KP, Lambe Jr DW, Keplinger JL, Kalbfleisch JH. Comparison of the pathogenicity of three species of coagulase-negative Staphylococcus in a mouse model with and without a foreign body. Can J Microbiol. 1991;37(9):722–4.CrossRef
122.
go back to reference Fluckiger U, Ulrich M, Steinhuber A, Doring G, Mack D, Landmann R, et al. Biofilm formation, icaADBC transcription, and polysaccharide intercellular adhesin synthesis by staphylococci in a device-related infection model. Infect Immun. 2005;73(3):1811–9.CrossRef Fluckiger U, Ulrich M, Steinhuber A, Doring G, Mack D, Landmann R, et al. Biofilm formation, icaADBC transcription, and polysaccharide intercellular adhesin synthesis by staphylococci in a device-related infection model. Infect Immun. 2005;73(3):1811–9.CrossRef
123.
go back to reference Francois P, Tu Quoc PH, Bisognano C, Kelley WL, Lew DP, Schrenzel J, et al. Lack of biofilm contribution to bacterial colonisation in an experimental model of foreign body infection by Staphylococcus aureus and Staphylococcus epidermidis. FEMS Immunol Med Microbiol. 2003;35(2):135–40.CrossRef Francois P, Tu Quoc PH, Bisognano C, Kelley WL, Lew DP, Schrenzel J, et al. Lack of biofilm contribution to bacterial colonisation in an experimental model of foreign body infection by Staphylococcus aureus and Staphylococcus epidermidis. FEMS Immunol Med Microbiol. 2003;35(2):135–40.CrossRef
124.
go back to reference Lambe Jr DW, Ferguson KP, Keplinger JL, Gemmell CG, Kalbfleisch JH. Pathogenicity of Staphylococcus lugdunensis, Staphylococcus schleiferi, and three other coagulase-negative staphylococci in a mouse model and possible virulence factors. Can J Microbiol. 1990;36(7):455–63.CrossRef Lambe Jr DW, Ferguson KP, Keplinger JL, Gemmell CG, Kalbfleisch JH. Pathogenicity of Staphylococcus lugdunensis, Staphylococcus schleiferi, and three other coagulase-negative staphylococci in a mouse model and possible virulence factors. Can J Microbiol. 1990;36(7):455–63.CrossRef
125.
go back to reference Lambe Jr DW, Ferguson KP, Mayberry-Carson KJ, Tober-Meyer B, Costerton JW. Foreign-body-associated experimental osteomyelitis induced with Bacteroides fragilis and Staphylococcus epidermidis in rabbits. Clin Orthop Relat Res. 1991;266:285–94. Lambe Jr DW, Ferguson KP, Mayberry-Carson KJ, Tober-Meyer B, Costerton JW. Foreign-body-associated experimental osteomyelitis induced with Bacteroides fragilis and Staphylococcus epidermidis in rabbits. Clin Orthop Relat Res. 1991;266:285–94.
126.
go back to reference Mayberry-Carson KJ, Tober-Meyer B, Gill LR, Lambe Jr DW, Hossler FE. Effect of ciprofloxacin on experimental osteomyelitis in the rabbit tibia, induced with a mixed infection of Staphylococcus epidermidis and Bacteroides thetaiotaomicron. Microbios. 1990;64(258):49–66. Mayberry-Carson KJ, Tober-Meyer B, Gill LR, Lambe Jr DW, Hossler FE. Effect of ciprofloxacin on experimental osteomyelitis in the rabbit tibia, induced with a mixed infection of Staphylococcus epidermidis and Bacteroides thetaiotaomicron. Microbios. 1990;64(258):49–66.
127.
go back to reference Campoccia D, Montanaro L, Moriarty TF, Richards RG, Ravaioli S, Arciola CR. The selection of appropriate bacterial strains in preclinical evaluation of infection-resistant biomaterials. Int J Artif Organs. 2008;31(9):841–7. Campoccia D, Montanaro L, Moriarty TF, Richards RG, Ravaioli S, Arciola CR. The selection of appropriate bacterial strains in preclinical evaluation of infection-resistant biomaterials. Int J Artif Organs. 2008;31(9):841–7.
128.
go back to reference Beenken KE, Dunman PM, McAleese F, Macapagal D, Murphy E, Projan SJ, et al. Global gene expression in Staphylococcus aureus biofilms. J Bacteriol. 2004;186(14):4665–84.CrossRef Beenken KE, Dunman PM, McAleese F, Macapagal D, Murphy E, Projan SJ, et al. Global gene expression in Staphylococcus aureus biofilms. J Bacteriol. 2004;186(14):4665–84.CrossRef
129.
go back to reference Cassat J, Dunman PM, Murphy E, Projan SJ, Beenken KE, Palm KJ, et al. Transcriptional profiling of a Staphylococcus aureus clinical isolate and its isogenic agr and sarA mutants reveals global differences in comparison to the laboratory strain RN6390. Microbiology. 2006;152(Pt 10):3075–90.CrossRef Cassat J, Dunman PM, Murphy E, Projan SJ, Beenken KE, Palm KJ, et al. Transcriptional profiling of a Staphylococcus aureus clinical isolate and its isogenic agr and sarA mutants reveals global differences in comparison to the laboratory strain RN6390. Microbiology. 2006;152(Pt 10):3075–90.CrossRef
130.
go back to reference Herbert S, Ziebandt AK, Ohlsen K, Schafer T, Hecker M, Albrecht D, et al. Repair of global regulators in Staphylococcus aureus 8325 and comparative analysis with other clinical isolates. Infect Immun. 2010;78(6):2877–89.CrossRef Herbert S, Ziebandt AK, Ohlsen K, Schafer T, Hecker M, Albrecht D, et al. Repair of global regulators in Staphylococcus aureus 8325 and comparative analysis with other clinical isolates. Infect Immun. 2010;78(6):2877–89.CrossRef
131.
go back to reference Sivadon V, Rottman M, Chaverot S, Quincampoix JC, de Avettand V, Mazancourt P, et al. Use of genotypic identification by sodA sequencing in a prospective study to examine the distribution of coagulase-negative Staphylococcus species among strains recovered during septic orthopedic surgery and evaluate their significance. J Clin Microbiol. 2005;43(6):2952–4.CrossRef Sivadon V, Rottman M, Chaverot S, Quincampoix JC, de Avettand V, Mazancourt P, et al. Use of genotypic identification by sodA sequencing in a prospective study to examine the distribution of coagulase-negative Staphylococcus species among strains recovered during septic orthopedic surgery and evaluate their significance. J Clin Microbiol. 2005;43(6):2952–4.CrossRef
132.
go back to reference Mayberry-Carson KJ, Tober-Meyer B, Lambe Jr DW, Costerton JW. Osteomyelitis experimentally induced with Bacteroides thetaiotaomicron and Staphylococcus epidermidis. Influence of a foreign-body implant. Clin Orthop Relat Res. 1992;280:289–99. Mayberry-Carson KJ, Tober-Meyer B, Lambe Jr DW, Costerton JW. Osteomyelitis experimentally induced with Bacteroides thetaiotaomicron and Staphylococcus epidermidis. Influence of a foreign-body implant. Clin Orthop Relat Res. 1992;280:289–99.
133.
go back to reference Marberry KM, Kazmier P, Simpson WA, Christensen GD, Phaup JG, Hendricks KJ, et al. Surfactant wound irrigation for the treatment of staphylococcal clinical isolates. Clin Orthop Relat Res. 2002;403:73–9.CrossRef Marberry KM, Kazmier P, Simpson WA, Christensen GD, Phaup JG, Hendricks KJ, et al. Surfactant wound irrigation for the treatment of staphylococcal clinical isolates. Clin Orthop Relat Res. 2002;403:73–9.CrossRef
134.
go back to reference Hidaka S. An experimental study on pyogenic osteomyelitis with special reference to polymicrobial infections. Nippon Seikeigeka Gakkai Zasshi. 1985;59(4):429–41. Hidaka S. An experimental study on pyogenic osteomyelitis with special reference to polymicrobial infections. Nippon Seikeigeka Gakkai Zasshi. 1985;59(4):429–41.
135.
go back to reference Johansson A, Svensson O, Blomgren G, Eliasson G, Nord CE. Anaerobic osteomyelitis. A new experimental rabbit model. Clin Orthop Relat Res. 1991;265:297–301. Johansson A, Svensson O, Blomgren G, Eliasson G, Nord CE. Anaerobic osteomyelitis. A new experimental rabbit model. Clin Orthop Relat Res. 1991;265:297–301.
136.
go back to reference Blomgren G, Lundquist H, Nord CE, Lindgren U. Late anaerobic haematogenous infection of experimental total joint replacement. A study in the rabbit using Propionibacterium acnes. J Bone Joint Surg Br. 1981;63B(4):614–8. Blomgren G, Lundquist H, Nord CE, Lindgren U. Late anaerobic haematogenous infection of experimental total joint replacement. A study in the rabbit using Propionibacterium acnes. J Bone Joint Surg Br. 1981;63B(4):614–8.
137.
go back to reference Blomgren G. Hematogenous infection of total joint replacement. An experimental study in the rabbit. Acta Orthop Scand Suppl. 1981;187:1–64. Blomgren G. Hematogenous infection of total joint replacement. An experimental study in the rabbit. Acta Orthop Scand Suppl. 1981;187:1–64.
138.
go back to reference Costerton JW. Biofilm theory can guide the treatment of device-related orthopaedic infections. Clin Orthop Relat Res. 2005;437:7–11.CrossRef Costerton JW. Biofilm theory can guide the treatment of device-related orthopaedic infections. Clin Orthop Relat Res. 2005;437:7–11.CrossRef
139.
go back to reference Stoodley P, Nistico L, Johnson S, Lasko LA, Baratz M, Gahlot V, et al. Direct demonstration of viable Staphylococcus aureus biofilms in an infected total joint arthroplasty. A case report. J Bone Joint Surg Am. 2008;90(8):1751–8.CrossRef Stoodley P, Nistico L, Johnson S, Lasko LA, Baratz M, Gahlot V, et al. Direct demonstration of viable Staphylococcus aureus biofilms in an infected total joint arthroplasty. A case report. J Bone Joint Surg Am. 2008;90(8):1751–8.CrossRef
140.
go back to reference Gristina AG, Costerton JW. Bacterial adherence and the glycocalyx and their role in musculoskeletal infection. Orthop Clin North Am. 1984;15(3):517–35. Gristina AG, Costerton JW. Bacterial adherence and the glycocalyx and their role in musculoskeletal infection. Orthop Clin North Am. 1984;15(3):517–35.
141.
go back to reference Smith K, Perez A, Ramage G, Lappin D, Gemmell CG, Lang S. Biofilm formation by Scottish clinical isolates of Staphylococcus aureus. J Med Microbiol. 2008;57(Pt 8):1018–23.CrossRef Smith K, Perez A, Ramage G, Lappin D, Gemmell CG, Lang S. Biofilm formation by Scottish clinical isolates of Staphylococcus aureus. J Med Microbiol. 2008;57(Pt 8):1018–23.CrossRef
142.
go back to reference Fitzpatrick F, Humphreys H, O’Gara JP. Evidence for icaADBC-independent biofilm development mechanism in methicillin-resistant Staphylococcus aureus clinical isolates. J Clin Microbiol. 2005;43(4):1973–6.CrossRef Fitzpatrick F, Humphreys H, O’Gara JP. Evidence for icaADBC-independent biofilm development mechanism in methicillin-resistant Staphylococcus aureus clinical isolates. J Clin Microbiol. 2005;43(4):1973–6.CrossRef
143.
go back to reference O’Neill E, Pozzi C, Houston P, Humphreys H, Robinson DA, Loughman A, et al. A novel Staphylococcus aureus biofilm phenotype mediated by the fibronectin-binding proteins, FnBPA and FnBPB. J Bacteriol. 2008;190(11):3835–50.CrossRef O’Neill E, Pozzi C, Houston P, Humphreys H, Robinson DA, Loughman A, et al. A novel Staphylococcus aureus biofilm phenotype mediated by the fibronectin-binding proteins, FnBPA and FnBPB. J Bacteriol. 2008;190(11):3835–50.CrossRef
144.
go back to reference Campoccia D, Speziale P, Ravaioli S, Cangini I, Rindi S, Pirini V, et al. The presence of both bone sialoprotein-binding protein gene and collagen adhesin gene as a typical virulence trait of the major epidemic cluster in isolates from orthopedic implant infections. Biomaterials. 2009;30(34):6621–8.CrossRef Campoccia D, Speziale P, Ravaioli S, Cangini I, Rindi S, Pirini V, et al. The presence of both bone sialoprotein-binding protein gene and collagen adhesin gene as a typical virulence trait of the major epidemic cluster in isolates from orthopedic implant infections. Biomaterials. 2009;30(34):6621–8.CrossRef
145.
go back to reference Patti JM, Allen BL, McGavin MJ, Hook M. MSCRAMM-mediated adherence of microorganisms to host tissues. Annu Rev Microbiol. 1994;48:585–617.CrossRef Patti JM, Allen BL, McGavin MJ, Hook M. MSCRAMM-mediated adherence of microorganisms to host tissues. Annu Rev Microbiol. 1994;48:585–617.CrossRef
146.
go back to reference Patti JM, Hook M. Microbial adhesins recognizing extracellular matrix macromolecules. Curr Opin Cell Biol. 1994;6(5):752–8.CrossRef Patti JM, Hook M. Microbial adhesins recognizing extracellular matrix macromolecules. Curr Opin Cell Biol. 1994;6(5):752–8.CrossRef
147.
go back to reference Vazquez V, Liang X, Horndahl JK, Ganesh VK, Smeds E, Foster TJ, et al. Fibrinogen is a ligand for the S. aureus MSCRAMM Bbp (bone sialoprotein-binding protein). J Biol Chem. 2011;286(34):29797–805.CrossRef Vazquez V, Liang X, Horndahl JK, Ganesh VK, Smeds E, Foster TJ, et al. Fibrinogen is a ligand for the S. aureus MSCRAMM Bbp (bone sialoprotein-binding protein). J Biol Chem. 2011;286(34):29797–805.CrossRef
148.
go back to reference Johansson A, Flock JI, Svensson O. Collagen and fibronectin binding in experimental staphylococcal osteomyelitis. Clin Orthop Relat Res. 2001;382:241–6.CrossRef Johansson A, Flock JI, Svensson O. Collagen and fibronectin binding in experimental staphylococcal osteomyelitis. Clin Orthop Relat Res. 2001;382:241–6.CrossRef
149.
go back to reference Darouiche RO, Landon GC, Patti JM, Nguyen LL, Fernau RC, McDevitt D, et al. Role of Staphylococcus aureus surface adhesins in orthopaedic device infections: are results model-dependent? J Med Microbiol. 1997;46(1):75–9.CrossRef Darouiche RO, Landon GC, Patti JM, Nguyen LL, Fernau RC, McDevitt D, et al. Role of Staphylococcus aureus surface adhesins in orthopaedic device infections: are results model-dependent? J Med Microbiol. 1997;46(1):75–9.CrossRef
150.
go back to reference Dohin B, Gillet Y, Kohler R, Lina G, Vandenesch F, Vanhems P, et al. Pediatric bone and joint infections caused by Panton-Valentine leukocidin-positive Staphylococcus aureus. Pediatr Infect Dis J. 2007;26(11):1042–8.CrossRef Dohin B, Gillet Y, Kohler R, Lina G, Vandenesch F, Vanhems P, et al. Pediatric bone and joint infections caused by Panton-Valentine leukocidin-positive Staphylococcus aureus. Pediatr Infect Dis J. 2007;26(11):1042–8.CrossRef
151.
go back to reference Tristan A, Bes M, Meugnier H, Lina G, Bozdogan B, Courvalin P, et al. Global distribution of Panton-Valentine leukocidin—positive methicillin-resistant Staphylococcus aureus, 2006. Emerg Infect Dis. 2007;13(4):594–600.CrossRef Tristan A, Bes M, Meugnier H, Lina G, Bozdogan B, Courvalin P, et al. Global distribution of Panton-Valentine leukocidin—positive methicillin-resistant Staphylococcus aureus, 2006. Emerg Infect Dis. 2007;13(4):594–600.CrossRef
152.
go back to reference Patel AH, Nowlan P, Weavers ED, Foster T. Virulence of protein A-deficient and alpha-toxin-deficient mutants of Staphylococcus aureus isolated by allele replacement. Infect Immun. 1987;55(12):3103–10. Patel AH, Nowlan P, Weavers ED, Foster T. Virulence of protein A-deficient and alpha-toxin-deficient mutants of Staphylococcus aureus isolated by allele replacement. Infect Immun. 1987;55(12):3103–10.
153.
go back to reference An YH, Bradley J, Powers DL, Friedman RJ. The prevention of prosthetic infection using a cross-linked albumin coating in a rabbit model. J Bone Joint Surg Br. 1997;79(5):816–9.CrossRef An YH, Bradley J, Powers DL, Friedman RJ. The prevention of prosthetic infection using a cross-linked albumin coating in a rabbit model. J Bone Joint Surg Br. 1997;79(5):816–9.CrossRef
Metadata
Title
Animal Models of Orthopedic Implant-Related Infection
Authors
Lorenzo Calabro
Cameron Lutton
Ahmed Fouad Seif El Din
R. Geoff Richards
T. Fintan Moriarty
Copyright Year
2013
Publisher
Springer New York
DOI
https://doi.org/10.1007/978-1-4614-1031-7_12

Premium Partners