In vitro activities of 13 fluoroquinolones against Staphylococcus aureus isolates with characterized mutations in gyrA, gyrB, grlA, and norA and against wild-type isolates.

Autor: Muñoz Bellido JL; Departamento de Microbiología, Hospital Universitario de Salamanca, Spain., Alonso Manzanares MA, Yagüe Guirao G, Gutiérrez Zufiaurre MN, Toldos MC, Segovia Hernández M, Garcia-Rodríguez JA
Jazyk: angličtina
Zdroj: Antimicrobial agents and chemotherapy [Antimicrob Agents Chemother] 1999 Apr; Vol. 43 (4), pp. 966-8.
DOI: 10.1128/AAC.43.4.966
Abstrakt: The in vitro activities of 13 fluoroquinolones (FQs) were tested against 90 Staphylococcus aureus clinical isolates: 30 wild type for gyrA, gyrB, grlA and norA and 60 with mutations in these genes. Clinafloxacin (CI-960), sparfloxacin, and grepafloxacin were the most active FQs against wild-type isolates (MICs at which 90% of isolates were inhibited, 0.06 to 0.1 microgram/ml). Mutations in grlA did not affect the MICs of newer FQs. grlA-gyrA double mutations led to higher MICs for all the FQs tested. Efflux mechanisms affected the newer FQs to a much lesser extent than the less recently developed FQs.
Databáze: MEDLINE