title: [In vitro activity of cefepime against ESBL-positive clinical strains of gram-negative rods].
abstract: The aim of this study was to determine an in vitro activity of cefepime against ESBL-positive clinical strains of Gram-negative rods isolated from hospitalized patients. Experiments were performed with 100 ESBL-positive strains of Gram-negative rods isolated from clinical samples in 2004. Strains were identified with the use of automatic ATB Expression system and biochemical ID 32 GN tests (bioMdrieux sa). Extended-spectrum beta-lactamases (ESBLs) were detected by means of disc diffusion methods: the double-disc synergy test (DDST) and the diagnostic disc test (DD, Oxoid Ltd, UK). Susceptibility in vitro of ESBL producers to 4th generation--cefepime was determined with gradient diffusion method Etest (AB Biodisk, Solna, Sweden). MIC value of cefepime was assessed for each strain. Among 100 ESBL-producing strains, 94--belonged to enteric rods and 6--to nonfermentative rods. The greatest number of strains belonged to the species Serratia marcescens (27% of all strains) and next--to the species Enterobacter cloacae (21%). Fourteen strains were susceptible (S) in vitro to cefepime, 12--intermediately susceptible (I) and 74--resistant (R). Application of cefepime in a therapy of infections caused by ESBL-positive strains of Gram-negative rods highly susceptible in vitro to this antibiotic, should be considered.
authors.affiliation: Katedra i Zakład Mikrobiologii Lekarskiej AM w Warszawie.
authors.forename: Alicja
authors.initials: A
authors.lastname: Rokosz
authors.forename: Anna
authors.initials: A
authors.lastname: Sawicka-Grzelak
authors.forename: Mirosław
authors.initials: M
authors.lastname: Luczak
mesh_terms: D000077723:Cefepime; D002511:Cephalosporins / Q000494:pharmacology*; D024901:Drug Resistance, Multiple, Bacterial / Q000235:genetics; D006090:Gram-Negative Bacteria / Q000187:drug effects / Q000201:enzymology*; D006801:Humans; D066298:In Vitro Techniques; D008826:Microbial Sensitivity Tests; D018440:beta-Lactam Resistance; D001618:beta-Lactamases / Q000096:biosynthesis* / Q000235:genetics
chemical_list: D002511:Cephalosporins; D000077723:Cefepime; D001618:beta-Lactamases