Isolation and antimicrobial susceptibility of methicillin-resistant staphylococci (MRS) in Osaka Dental University Hospital Prevalence of MRS colonization in the Hospital environment (part 2)

Abstract

We investigated the prevalence of methicillin-resistant staphylococci(MRS) in Osaka Dental University Hospital by examining 339 locations in operating rooms, hospital wards and 7 outpatient clinics in 1994, and by testing antimicrobial susceptibility of the isolates. MRS were isolated from 25 of 110 operating room locations, 97 of l17 hospital ward locations, and 49 of 112 outpatient clinic locations. Twenty-six of the MRS strains tested had mannitol fermentation, while none had coagulase production. MRS strains were classified into various types according to antibiotic sesnitivity. All MRS strains tested were susceptible to vancomycin. These results suggest that the hospital environment in Osaka Dental University Hospital was extensively contaminated with methicillin-resistant, coagulase-negative staphylococci.