The purpose of this study was to investigate the spread of methicillin-resistant staphylococci (MRS) in Osaka Dental University Hospital. We examined 65 locations in the hospital wards and tested the antimicrobial susceptibility of the isolates. MRS were isolated from 55 hospital ward locations. About half the MRS strains were isolated from locations in contact with the medical staff or inpatients, and the others from non-contact locations. MRS were classified into various types according to antibiotic sensitivity. All strains tested were susceptible to vancomycin. These results suggest that nosocomial infections were occurring in the hospital wards.
