title: Extensive multidrug resistance of coagulase-negative staphylococci in medical students.
abstract: Staphylococcus aureus and coagulase-negative staphylococci (CNS) isolated from the nasal mucosa of medical students were examined for susceptibility to 16 antimicrobial agents. No methicillin-resistant S. aureus (MRSA) was isolated, while MRCNS was present in 23.5% of the medical students. CNS exhibited significantly more resistance to antimicrobial agents such as gentamicin, in addition to oxacillin, compared to S. aureus, and 13.1% of the CNS strains (mostly MRCNS) were multidrug-resistant (to five or more drugs). In contrast, ampicillin resistance was higher in S. aureus. The rate of hospitalization or of taking an antimicrobial agent within the past 1 year was lower in CNS+ students than in S. aureus+ students. The data suggest that CNS could serve as a reservoir of drug resistance by persistent colonization in the nasal mucosa. In this study, MRCNS with multidrug resistance was found in medical students. More attention should be given to nasal MRCNS in medical students as a possible spreader in hospitals.
authors.affiliation: Division of Bacteriology, Department of Infectious Disease Control and International Medicine, Niigata University Graduate School of Medical and Dental Sciences, 757 Ichibanchou, Asahimachidori, Niigata 951-8510, Japan.
authors.forename: Wataru
authors.initials: W
authors.lastname: Higuchi
authors.forename: Hirokazu
authors.initials: H
authors.lastname: Isobe
authors.forename: Yasuhisa
authors.initials: Y
authors.lastname: Iwao
authors.forename: Soshi
authors.initials: S
authors.lastname: Dohmae
authors.forename: Kohei
authors.initials: K
authors.lastname: Saito
authors.forename: Tomomi
authors.initials: T
authors.lastname: Takano
authors.forename: Taketo
authors.initials: T
authors.lastname: Otsuka
authors.forename: Tatiana
authors.initials: T
authors.lastname: Baranovich
authors.forename: Chiho
authors.initials: C
authors.lastname: Endo
authors.forename: Nobuaki
authors.initials: N
authors.lastname: Suzuki
authors.forename: Yasuyuki
authors.initials: Y
authors.lastname: Tomiyama
authors.forename: Tatsuo
authors.initials: T
authors.lastname: Yamamoto
mesh_terms: D002353:Carrier State / Q000382:microbiology; D003030:Coagulase / Q000032:analysis; D024901:Drug Resistance, Multiple, Bacterial / Q000187:drug effects*; D006801:Humans; D008826:Microbial Sensitivity Tests; D009297:Nasal Mucosa / Q000382:microbiology; D013210:Staphylococcus / Q000187:drug effects* / Q000201:enzymology / Q000302:isolation & purification*; D013211:Staphylococcus aureus / Q000201:enzymology / Q000302:isolation & purification*; D013337:Students, Medical
chemical_list: D003030:Coagulase