title: Linezolid and quinupristin/dalfopristin resistance in vancomycin-resistant enterococci and methicillin-resistant Staphylococcus aureus prior to clinical use in Turkey.
abstract: The aim of this study was to determine the in vitro antimicrobial activity of recently licensed quinupristin/dalfopristin and linezolid which have not yet been in clinical use in Turkey against methicillin-resistant Staphylococcus aureus (MRSA) and vancomycin-resistant enterococci (VRE) strains isolated from various clinical specimens by using the Etest. The results showed that all MRSA strains were fully susceptible to both the new compounds. All strains were inhibited by 1 mg/l quinupristin/dalfopristin (mode MIC 0.38 mg/l) and by 3 mg/l linezolid (mode MIC 1.5 mg/l). Four strains of Enterococcus faecium showed an increase of resistance of 2-3 mg/l to quinupristin/dalfopristin (susceptible mode MIC 0.38 mg/l). With linezolid, all strains except two fell within the range 0.75-2.0 mg/l.
authors.affiliation: Department of Microbiology and Clinical Microbiology, Gulhane Military Medical Academy, 06018-Etlik, Ankara, Turkey. mbaysallar@gata.edu.tr
authors.forename: Mehmet
authors.initials: M
authors.lastname: Baysallar
authors.forename: Abdullah
authors.initials: A
authors.lastname: Kilic
authors.forename: Hakan
authors.initials: H
authors.lastname: Aydogan
authors.forename: Feriha
authors.initials: F
authors.lastname: Cilli
authors.forename: Levent
authors.initials: L
authors.lastname: Doganci
mesh_terms: D000081:Acetamides / Q000494:pharmacology* / Q000627:therapeutic use; D000900:Anti-Bacterial Agents / Q000494:pharmacology; D001769:Blood / Q000382:microbiology; D002555:Cerebrospinal Fluid / Q000382:microbiology; D024881:Drug Resistance, Bacterial; D016983:Enterococcus / Q000187:drug effects* / Q000302:isolation & purification; D006801:Humans; D000069349:Linezolid; D016106:Methicillin Resistance; D008826:Microbial Sensitivity Tests; D023303:Oxazolidinones / Q000494:pharmacology* / Q000627:therapeutic use; D012007:Rectum / Q000382:microbiology; D012137:Respiratory System / Q000382:microbiology; D013203:Staphylococcal Infections / Q000188:drug therapy / Q000382:microbiology; D013211:Staphylococcus aureus / Q000187:drug effects* / Q000302:isolation & purification; D014421:Turkey; D020713:Vancomycin Resistance; D014769:Virginiamycin / Q000494:pharmacology* / Q000627:therapeutic use; D014947:Wounds and Injuries / Q000382:microbiology
chemical_list: D000081:Acetamides; D000900:Anti-Bacterial Agents; D023303:Oxazolidinones; D014769:Virginiamycin; C062940:quinupristin-dalfopristin; D000069349:Linezolid