EPIDEMIOLOGY OF COAGULASE NEGATIVE STAPHYLOCOCCI IN PERIPROSTHETIC JOINT INFECTIONS

The objective was to compare susceptibility testing of all coagulase negative species (CNS) found in periprosthetic joint infections (PJI).We conducted a multicentre retrospective study in a same area from 2011 to 2014, including 215 CNS strains.Diagnosis of PJI was based on clinical, radiological and biological criteria. Microbiological criterion was at least 2 per-operative deep positive cultures with the same species of CNS. Identification and susceptibility testing were performed on automated Vitek2 (Biomerieux, France).PJI localizations were 54% knees, 39% hips, 7% other sites.CNS found in our study were by dicreasing order:S. epidermidis (SE) 60%, S. capitis 11%, S. lugdunensis (SL) 10%, S. caprae 5%, S. warneri (SW) 4%, S. hominis (SHo) 3%, S. haemolyticus (SHa) 3%. Fifty two percent of CNS strains were meticillin (oxacillin) resistant and 31%, 33%, 41%, 20% were also resistant to clindamycin (CLI), trimethoprim-sulfamethoxazole (SXT), ofloxacin (OFX), rifampicin (RMP) respectively. Regarding CNS s...