Mechanisms of resistance to cephalosporin and emergence of O25b‐ST131 clone harboring CTX‐M‐27 β‐lactamase in extraintestinal pathogenic Escherichia coli from dogs and cats in Japan

Abstract excerpt

Thirty-three cefazolin-resistant extraintestinal pathogenic Escherichia coli strains from companion animals were screened for bla(CMY-1) , bla(CMY-2) , bla(SHV) , bla(TEM) , and bla(CTX-M) genes. Extended-spectrum β-lactamase-producing strains were further characterized by O serotyping and multilocus sequence typing. It was found that 20 and 17 isolates harbored TEM-1 and CMY-2 β-lactamases, respectively, and 13...

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