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  • In vitro activity and emergence of resistance to mupirocin in Staphylococcus aureus = In vitro aktivnost in razvoj odpornosti proti mupirocinu pri bakteriji Staphylococcus aureus
    Rotger, Margalida ; Tomič, Viktorija ; Trampuž, Andrej
    Background. Nasal carriage of Staphylococcus aureus is an important risk factor for later infection with the same strain. Topical mupirocin is used forS. aureus nasal decolonization. However, due to ... increasing mupirocin misuseresistance may develop rapidly. We determined the in vitro activity of mupirocin and compared the emergence of resistance among30 methicillin-susceptible S. aureus (MSSA) isolates and 30 methicillin-resistantS. aureus (MRSA) isolates. Methods. Minimal inhibitory concentrations (MICs) were determined according to the National Committee for Clinical Laboratory Standards (NCCLS). Emergence of resistance studies were performed by incubating the isolates with increasing concentrations of mupirocin (0.125 to 16 micro g/ml) over 8 days in Mueller-Hinton broth (MHB). Isolates were screened for resistance using Mueller-Hinton agar plates with 4 micro g/ml of mupirocin. Results. MICs were determined for all recovered isolates. Before mupirocin exposure, MSSA and MRSA MIC90 (range) in micro g/mlwere 0.25 (0.06-4) and 0.25 (0.06-0.5). After one day of mupirocin exposure, all recovered isolates demonstrated decreased susceptibility to mupirocin (MSSA MIC90 64 micro g/ml and MRSA MIC90 32 micro g/ml). On subsequent days, no further significant changes in the mupirocin MIC90 was detected. Conclusions. The in vitro study suggests that mupirocin resistance emerges easily and early after exposure to low antimicrobial concentrations. Therefore, mupirocin should be used prudently and should always be combined with other decolonization interventions such as gargling and skin wash with chlohexidine.
    Vir: Zdravniški vestnik : glasilo Slovenskega zdravniškega društva = Slovenian medical journal = journal of Slovenian Medical Association. - ISSN 1318-0347 (Letn. 72, št. 10, okt. 2003, str. 557-559)
    Vrsta gradiva - članek, sestavni del
    Leto - 2003
    Jezik - angleški
    COBISS.SI-ID - 17018585

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    Digitalna knjižnica Slovenije - dLib.si

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