title: Genetic characteristics of CTX-M-type extended-spectrum-β-lactamase (ESBL)-producing enterobacteriaceae involved in mastitis cases on Japanese dairy farms, 2007 to 2011.
abstract: Sixty-five CTX-M-2/15/14 extended-spectrum-β-lactamase-producing Enterobacteriaceae were isolated from 258,888 mastitic milk samples from Japanese dairy farms between 2007 and 2011. CTX-M-2-producing Klebsiella pneumoniae and CTX-M-15-producing Escherichia coli were the predominant strains isolated. There was no predominant clonal type, and clonal diversity was found even in strains isolated from a single farm.
authors.affiliation: Veterinary Clinical Laboratory, Nemuro District Agricultural Mutual Aid Association, Nakashibetsu, Hokkaido, Japan.
authors.forename: Mamoru
authors.initials: M
authors.lastname: Ohnishi
authors.forename: Alexandre T
authors.initials: AT
authors.lastname: Okatani
authors.forename: Kazuki
authors.initials: K
authors.lastname: Harada
authors.forename: Takuo
authors.initials: T
authors.lastname: Sawada
authors.forename: Kenji
authors.initials: K
authors.lastname: Marumo
authors.forename: Masaru
authors.initials: M
authors.lastname: Murakami
authors.forename: Reiichiro
authors.initials: R
authors.lastname: Sato
authors.forename: Hidetake
authors.initials: H
authors.lastname: Esaki
authors.forename: Keiko
authors.initials: K
authors.lastname: Shimura
authors.forename: Hajime
authors.initials: H
authors.lastname: Kato
authors.forename: Naoki
authors.initials: N
authors.lastname: Uchida
authors.forename: Toshio
authors.initials: T
authors.lastname: Takahashi
mesh_terms: D000818:Animals; D002417:Cattle; D016000:Cluster Analysis; D004755:Enterobacteriaceae / Q000201:enzymology* / Q000235:genetics / Q000302:isolation & purification; D004756:Enterobacteriaceae Infections / Q000453:epidemiology / Q000382:microbiology / Q000662:veterinary*; D005260:Female; D014644:Genetic Variation; D007564:Japan; D008414:Mastitis, Bovine / Q000453:epidemiology / Q000382:microbiology*; D008892:Milk / Q000382:microbiology*; D017720:Molecular Epidemiology; D058889:Molecular Typing; D015995:Prevalence; D001618:beta-Lactamases / Q000235:genetics*
chemical_list: D001618:beta-Lactamases