title: Prevalence of multidrug-resistant bacteria at a tertiary-care teaching hospital in Mexico: special focus on Acinetobacter baumannii.
abstract: Our aim was to determine the prevalence of multidrug resistance of Acinetobacter baumannii and other pathogens at a tertiary-care teaching hospital in Mexico over a 3-year period. Clinical isolates of A. baumannii (n = 550), Pseudomonas aeruginosa (n = 250), some Enterobacteriaceae species (n = 500) and Staphylococcus aureus (n = 250) collected over a 3-year period were included. Susceptibility tests were performed by the broth microdilution method. 74% of A. baumannii, 40% of Escherichia coli, 34% of P. aeruginosa, 22% of Klebsiella pneumoniae, 9% of Enterobacter cloacae, and 7% of Serratia sp. were multidrug resistant. 59% of A. baumannii clinical isolates were meropenem-resistant. A. baumannii isolates from the lower respiratory tract were the most susceptible, followed by urine clinical isolates. Species from Enterobacteriaceae showed susceptibility rates higher than 90% to meropenem and tigecycline and Serratia sp. showed the highest susceptibility to the drugs evaluated. For P. aeruginosa, the most potent drug was levofloxacin, followed by meropenem and piperacillin-tazobactam. With regard to S. aureus, 96% of the isolates were susceptible to vancomycin, followed by tigecycline and minocycline (91% of strains susceptible). The high multidrug resistance observed underscores the need for surveillance of bacterial drug resistance.
authors.affiliation: Departamento de Microbiología, Facultad de Medicina, Universidad Autónoma de Nuevo León, Monterrey, Mexico. elvira_garza_gzz@yahoo.com
authors.forename: Elvira
authors.initials: E
authors.lastname: Garza-González
authors.forename: Jorge Martín
authors.initials: JM
authors.lastname: Llaca-Díaz
authors.forename: Francisco Javier
authors.initials: FJ
authors.lastname: Bosques-Padilla
authors.forename: Gloria M
authors.initials: GM
authors.lastname: González
mesh_terms: D000151:Acinetobacter Infections / Q000453:epidemiology / Q000382:microbiology; D040981:Acinetobacter baumannii / Q000187:drug effects* / Q000302:isolation & purification*; D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D001419:Bacteria / Q000187:drug effects* / Q000302:isolation & purification; D001424:Bacterial Infections / Q000453:epidemiology / Q000382:microbiology*; D024901:Drug Resistance, Multiple, Bacterial; D004755:Enterobacteriaceae / Q000187:drug effects; D006784:Hospitals, Teaching; D006801:Humans; D007711:Klebsiella pneumoniae / Q000187:drug effects; D000077731:Meropenem; D008800:Mexico / Q000453:epidemiology; D008826:Microbial Sensitivity Tests; D008911:Minocycline / Q000031:analogs & derivatives / Q000494:pharmacology; D015995:Prevalence; D011552:Pseudomonas Infections / Q000382:microbiology; D011550:Pseudomonas aeruginosa / Q000187:drug effects / Q000302:isolation & purification; D013211:Staphylococcus aureus / Q000187:drug effects; D013845:Thienamycins / Q000494:pharmacology; D000078304:Tigecycline
chemical_list: D000900:Anti-Bacterial Agents; D013845:Thienamycins; D000078304:Tigecycline; D000077731:Meropenem; D008911:Minocycline