{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,1]],"date-time":"2026-09-01T22:39:42Z","timestamp":1788302382047,"version":"build-2803163510"},"reference-count":63,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2023,4,13]],"date-time":"2023-04-13T00:00:00Z","timestamp":1681344000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100008771","name":"Animal and Plant Quarantine Agency","doi-asserted-by":"publisher","award":["N-1543081-2017-24-01"],"award-info":[{"award-number":["N-1543081-2017-24-01"]}],"id":[{"id":"10.13039\/501100008771","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Antibiotics"],"abstract":"<jats:p>Overall, 836 Escherichia coli isolates (695 isolates from dogs and 141 from cats) were recovered from the diarrhea, skin\/ear, urine, and genitals of dogs and cats between 2018 and 2019. Cefovecin and enrofloxacin resistance were noted in 17.1% and 21.2% of E. coli isolates, respectively. The cefovecin and enrofloxacin resistance rates were higher in dog isolates (18.1% and 22.9%) compared with the rates in cat isolates (12.1%, 12.8%). Interestingly, resistance to both antimicrobials was noted in 10.8% (90\/836) of the isolates, predominantly in isolates from dogs. blaCTX-M-14, blaCTX-M-15, and blaCMY-2 were the most frequent extended-spectrum \u03b2-lactamase\/plasmid-mediated AmpC \u03b2-lactamase (ESBL\/AmpC)- gene types. The co-existence of blaCTX-M andblaCMY-2 was noted in six E. coli isolates from dogs. Sequencing analysis demonstrated that S83L and D87N in gyrA and S80I in parC were the most frequent point mutations in the quinolone resistance-determining regions of the cefovecin and enrofloxacin-resistant isolates. A total of 11 isolates from dogs carried the plasmid-mediated quinolone resistance genes (six aac(6\u2019)-Ib-cr, four qnrS, and one qnrB), while only two cat isolates carried the qnrS gene. Multilocus sequence typing of the cefovecin and enrofloxacin-resistant isolates revealed that sequence type (ST)131 E. coli carrying blaCTX-M-14 and blaCTX-M-15 genes and ST405 E. coli carrying blaCMY-2 gene were predominant among the isolated E. coli strains. The majority of the ESBL\/AmpC-producing isolates displayed diverse pulsed-field gel electrophoresis profiles. This study demonstrated that third-generation cephalosporin- and fluoroquinolone-resistant E. coli were widely distributed in companion animals. The detection of the pandemic ST131 clone carrying blaCTX-M-14\/15 in companion animals presented a public health threat.<\/jats:p>","DOI":"10.3390\/antibiotics12040745","type":"journal-article","created":{"date-parts":[[2023,4,13]],"date-time":"2023-04-13T04:33:26Z","timestamp":1681360406000},"page":"745","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["Prevalence and Characterization of Extended-Spectrum \u03b2-Lactamase-Producing Escherichia coli Isolated from Dogs and Cats in South Korea"],"prefix":"10.3390","volume":"12","author":[{"given":"Ji-Hyun","family":"Choi","sequence":"first","affiliation":[{"name":"Bacterial Disease Division, Animal and Plant Quarantine Agency, 177 Hyeksin 8-ro, Gimcheon-si 39660, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Md. Sekendar","family":"Ali","sequence":"additional","affiliation":[{"name":"Bacterial Disease Division, Animal and Plant Quarantine Agency, 177 Hyeksin 8-ro, Gimcheon-si 39660, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bo-Youn","family":"Moon","sequence":"additional","affiliation":[{"name":"Bacterial Disease Division, Animal and Plant Quarantine Agency, 177 Hyeksin 8-ro, Gimcheon-si 39660, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hee-Young","family":"Kang","sequence":"additional","affiliation":[{"name":"Bacterial Disease Division, Animal and Plant Quarantine Agency, 177 Hyeksin 8-ro, Gimcheon-si 39660, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Su-Jeong","family":"Kim","sequence":"additional","affiliation":[{"name":"Bacterial Disease Division, Animal and Plant Quarantine Agency, 177 Hyeksin 8-ro, Gimcheon-si 39660, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hyun-Ju","family":"Song","sequence":"additional","affiliation":[{"name":"Bacterial Disease Division, Animal and Plant Quarantine Agency, 177 Hyeksin 8-ro, Gimcheon-si 39660, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Abraham Fikru","family":"Mechesso","sequence":"additional","affiliation":[{"name":"Department of Pathology and Microbiology, College of Medicine, University of Nebraska Medical Center, Omaha, NE 68198-5900, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1244-201X","authenticated-orcid":false,"given":"Dong-Chan","family":"Moon","sequence":"additional","affiliation":[{"name":"Division of Antimicrobial Resistance Research, Center for Infectious Diseases Research, Korea Disease Control and Prevention Agency, Cheongju 28159, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Suk-Kyung","family":"Lim","sequence":"additional","affiliation":[{"name":"Bacterial Disease Division, Animal and Plant Quarantine Agency, 177 Hyeksin 8-ro, Gimcheon-si 39660, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2023,4,13]]},"reference":[{"key":"ref_1","first-page":"141","article-title":"Are Escherichia coli Pathotypes Still Relevant in the Era of Whole-Genome Sequencing?","volume":"6","author":"Holt","year":"2016","journal-title":"Front. 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