title: Oxazolidinone susceptibility patterns for 2005: International Report from the Zyvox Annual Appraisal of Potency and Spectrum Study.
abstract: The international (non-USA) ZAAPS Program has accumulated 4 years of linezolid resistance surveillance results tracking infections caused by organisms with evolving resistance profiles. The major organism groups monitored were: Staphylococcus aureus and coagulase-negative staphylococci (including methicillin [oxacillin]-resistant strains), enterococci (including vancomycin-resistant [VRE] strains), Streptococcus pneumoniae (including multidrug-resistant [MDR] strains), viridans group streptococci and beta-haemolytic streptococci (4209 isolates overall). No linezolid-resistant strains were detected from the 16 monitored nations participating in 2005, consistent with previously reported 2002-2004 results. Linezolid remains highly active against Gram-positive strains including MRSA (MIC(90), 2mg/L). With MDR in Gram-positive organisms increasing in prevalence, continued surveillance of linezolid appears to be prudent practice as linezolid becomes more widely prescribed for these difficult-to-treat infections.
authors.affiliation: JMI Laboratories, 345 Beaver Kreek Centre, Suite A, North Liberty, IA 52317, USA. jim-ross@jmilabs.com
authors.forename: James E
authors.initials: JE
authors.lastname: Ross
authors.forename: Thomas R
authors.initials: TR
authors.lastname: Fritsche
authors.forename: Helio S
authors.initials: HS
authors.lastname: Sader
authors.forename: Ronald N
authors.initials: RN
authors.lastname: Jones
mesh_terms: D000081:Acetamides / Q000494:pharmacology*; D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D024901:Drug Resistance, Multiple, Bacterial; D016983:Enterococcus / Q000187:drug effects / Q000302:isolation & purification; D006094:Gram-Positive Bacteria / Q000187:drug effects* / Q000302:isolation & purification; D016908:Gram-Positive Bacterial Infections / Q000188:drug therapy / Q000382:microbiology; D006801:Humans; D066298:In Vitro Techniques; D000069349:Linezolid; D008826:Microbial Sensitivity Tests; D023303:Oxazolidinones / Q000494:pharmacology*; D013211:Staphylococcus aureus / Q000187:drug effects / Q000302:isolation & purification; D013291:Streptococcus / Q000145:classification / Q000187:drug effects / Q000302:isolation & purification; D013296:Streptococcus pneumoniae / Q000187:drug effects / Q000302:isolation & purification
chemical_list: D000081:Acetamides; D000900:Anti-Bacterial Agents; D023303:Oxazolidinones; D000069349:Linezolid