title: ESBL- and plasmidic class C beta-lactamase-producing E. coli strains isolated from poultry, pig and rabbit farms.
abstract: This study aims to determine the presence of extended-spectrum (ESBL) and plasmidic class C beta-lactamase-producing Enterobacteriaceae in poultry, pig and rabbit farms of Catalonia (Spain). PFGE typing showed a low clonal relationship among strains carrying these mechanisms of resistance. Ninety-three percent of them were resistant to two or more of the non-beta-lactam antimicrobials tested and harboured ESBL and plasmidic class C beta-lactamases. Greater diversity of these enzymes was found in strains from poultry farms, the CTX-M-9 family, especially CTX-M-14, with CMY-2 being the most frequent. The isolation of TEM-52 and SHV-2-producing Escherichia coli strains from these animal farms is noteworthy. In contrast, 73% of the strains from pig farms had CTX-M-1, and neither the CMY-type nor CTX-M-9 family enzyme was found. Likewise, it is the first time that CTX-M-1 and SHV-5 encoding strains have been isolated in pigs. On the other hand, in rabbit farms CTX-M-9 family was also the most frequent, being detected in three of a total of four strains. The last one showed a CMY-2, for the first time detected in these animals, too. In conclusion, commensal E. coli strains of food-producing animal farms are a reservoir of ESBL and plasmidic class C beta-lactamases.
authors.affiliation: Departament de Genètica i Microbiologia, Universitat Autònoma de Barcelona, Bellaterra, Spain.
authors.forename: Vanessa
authors.initials: V
authors.lastname: Blanc
authors.forename: Raul
authors.initials: R
authors.lastname: Mesa
authors.forename: Montserrat
authors.initials: M
authors.lastname: Saco
authors.forename: Susana
authors.initials: S
authors.lastname: Lavilla
authors.forename: Guillem
authors.initials: G
authors.lastname: Prats
authors.forename: Elisenda
authors.initials: E
authors.lastname: Miró
authors.forename: Ferran
authors.initials: F
authors.lastname: Navarro
authors.forename: Pilar
authors.initials: P
authors.lastname: Cortés
authors.forename: Montserrat
authors.initials: M
authors.lastname: Llagostera
mesh_terms: D000818:Animals; D000900:Anti-Bacterial Agents / Q000494:pharmacology; D002353:Carrier State / Q000662:veterinary; D004197:Disease Reservoirs / Q000662:veterinary; D024881:Drug Resistance, Bacterial; D016521:Electrophoresis, Gel, Pulsed-Field / Q000662:veterinary; D004756:Enterobacteriaceae Infections / Q000382:microbiology / Q000662:veterinary*; D004926:Escherichia coli / Q000187:drug effects / Q000201:enzymology; D004927:Escherichia coli Infections / Q000382:microbiology / Q000662:veterinary*; D008826:Microbial Sensitivity Tests / Q000662:veterinary; D011200:Poultry; D011817:Rabbits; D013030:Spain; D013552:Swine; D018440:beta-Lactam Resistance; D001618:beta-Lactamases / Q000302:isolation & purification / Q000378:metabolism*
chemical_list: D000900:Anti-Bacterial Agents; D001618:beta-Lactamases