title: [Prevalence of metallo-beta-lactamase in carbapenem resistant Pseudomonas aeruginosa at a university hospital of Buenos Aires City].
abstract: The present study was conducted to estimate the prevalence of metallo-beta-lactamases in 91 consecutive carbapenem resistant Pseudomonas aeruginosa isolates, recovered from inpatients at Hospital de Clínicas in Buenos Aires. Both, phenotypic and genotypic methods detected the presence of carbapenemases in 10 (11%) isolates, corresponding to VIM-11 in 7/10 and VIM-2 in the others. Codifying genes were all included in class 1 integrons, upstream genes coding for aminoglycoside modifying enzymes. One hundred percent sensitivity and specificity was achieved by the metallo-beta-lactamases phenotypic screening method using EDTA (1 micromol) disks in the Pseudomonas aeruginosa isolates included in this study. Sensitivity to aztreonam in carbapenem resistant isolates was suspicious of the presence of these enzymes.
authors.affiliation: Carrera de Especialización en Bioquímica Clínica, área Bacteriología Clínica, Escuela de graduados.
authors.forename: G
authors.initials: G
authors.lastname: Pagniez
authors.forename: M
authors.initials: M
authors.lastname: Radice
authors.forename: A
authors.initials: A
authors.lastname: Cuirolo
authors.forename: O
authors.initials: O
authors.lastname: Rodríguez
authors.forename: H
authors.initials: H
authors.lastname: Rodríguez
authors.forename: C
authors.initials: C
authors.lastname: Vay
authors.forename: A
authors.initials: A
authors.lastname: Famiglietti
authors.forename: G
authors.initials: G
authors.lastname: Gutkind
mesh_terms: D001118:Argentina / Q000453:epidemiology; D015780:Carbapenems / Q000494:pharmacology*; D024901:Drug Resistance, Multiple, Bacterial; D005838:Genotype; D006785:Hospitals, University / Q000706:statistics & numerical data; D006801:Humans; D015378:Imipenem / Q000494:pharmacology; D000077731:Meropenem; D010641:Phenotype; D011552:Pseudomonas Infections / Q000453:epidemiology / Q000382:microbiology*; D011550:Pseudomonas aeruginosa / Q000187:drug effects / Q000201:enzymology* / Q000235:genetics; D013845:Thienamycins / Q000494:pharmacology; D014505:Urban Population; D018440:beta-Lactam Resistance / Q000235:genetics*; D001618:beta-Lactamases / Q000032:analysis* / Q000235:genetics
chemical_list: D015780:Carbapenems; D013845:Thienamycins; D015378:Imipenem; C425108:beta-lactamase bla(vim-2); D001618:beta-Lactamases; D000077731:Meropenem