title: In vitro activity of tigecycline against 3989 Gram-negative and Gram-positive clinical isolates from the United States Tigecycline Evaluation and Surveillance Trial (TEST Program; 2004).
abstract: The Tigecycline Evaluation and Surveillance Trial (TEST Program) determined the in vitro activity of tigecycline over a large population of organisms from geographically diverse sites. Tigecycline was compared to amikacin, ampicillin, amoxicillin/clavulanic acid, imipenem, cefepime, ceftazidime, ceftriaxone, levofloxacin, minocycline, piperacillin/tazobactam, linezolid, penicillin, and vancomycin against 3989 commonly encountered clinical Gram-negative and Gram-positive pathogens collected from sites in the United States during 2004. The tigecycline activity was equivalent to imipenem against Enterobacteriaceae. Tigecycline inhibited extended-spectrum beta-lactamase and AmpC phenotypes at MIC90 values (minimum inhibitory concentration) of < or =2 microg/mL. In vitro results for tigecycline were similar to other broad-spectrum antimicrobial agents against nonfermenters with MIC90 results of 2 microg/mL against Acinetobacter spp. and >16 microg/mL against Pseudomonas aeruginosa. Tigecycline demonstrated potent activity against Staphylococcus aureus (MIC90, 0.25 microg/mL) and enterococci (MIC90, 0.12 microg/mL) regardless of methicillin or vancomycin susceptibility. Tigecycline MIC values were unaffected by penicillin nonsusceptibility and beta-lactamase production among fastidious respiratory pathogens (Streptococcus pneumoniae [MIC90, 0.5 microg/mL] and Haemophilus influenzae [MIC90, 0.25 microg/mL]). Tigecycline offers excellent activity against most of the commonly encountered nosocomial and community-acquired bacterial pathogens.
authors.affiliation: International Health Management Associates, Inc., Schaumburg, IL 60173-3817, USA. sbouchillon@ihmainc.com
authors.forename: Samuel K
authors.initials: SK
authors.lastname: Bouchillon
authors.forename: Daryl J
authors.initials: DJ
authors.lastname: Hoban
authors.forename: Brian M
authors.initials: BM
authors.lastname: Johnson
authors.forename: Jack L
authors.initials: JL
authors.lastname: Johnson
authors.forename: Andre
authors.initials: A
authors.lastname: Hsiung
authors.forename: Michael J
authors.initials: MJ
authors.lastname: Dowzicky
mesh_terms: D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D017714:Community-Acquired Infections / Q000382:microbiology; D003428:Cross Infection / Q000382:microbiology; D024901:Drug Resistance, Multiple, Bacterial; D006090:Gram-Negative Bacteria / Q000187:drug effects* / Q000302:isolation & purification; D016905:Gram-Negative Bacterial Infections / Q000382:microbiology; D006094:Gram-Positive Bacteria / Q000187:drug effects* / Q000302:isolation & purification; D016908:Gram-Positive Bacterial Infections / Q000382:microbiology; D006801:Humans; D008826:Microbial Sensitivity Tests; D008911:Minocycline / Q000031:analogs & derivatives* / Q000494:pharmacology; D000078304:Tigecycline
chemical_list: D000900:Anti-Bacterial Agents; D000078304:Tigecycline; D008911:Minocycline