This study reports a case of Staphylococcus warneri dissemination in the hair of ICU/ER doctors. Eleven of 23 doctors in the first survey and 11 of 24 doctors in the second survey, which were conducted after 6 months, carried S. warneri, while hair contamination of other coagulase-negative staphylococci was only sporadic. Chromosomal DNA analysis with PFGE revealed that 7 S. warneri strains isolated in the first survey and 7 strains isolated in the second survey showed similar PFGE patterns, suggesting that a cross-infection with a S. warneri strain continued over 6 months among the ICU doctors.

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