Occurrence of CTX-M-producing Escherichia coli from in broilers with colibacillosis
(주)코리아스칼라
- 최초 등록일
- 2023.04.03
- 최종 저작일
- 2022.09
- 4페이지/ 어도비 PDF
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서지정보
ㆍ발행기관 : 한국예방수의학회(구 한국수의공중보건학회)
ㆍ수록지정보 : 예방수의학회지 / 46권 / 3호
ㆍ저자명 : Young Ju Lee
목차
Abstract
ACKNOWLEDGMENTS
REFERENCES
영어 초록
Avian colibacillosis is severe respiratory and systemic disease caused by avian pathogenic E. coli (APEC). The disease results in economic loss because of early mortality and reduced productivity in chickens. Several antimicrobials have been used extensively for reducing the losses due to colibacillosis. β-lactams, including penicillin derivatives, cephalosporins, and carbapenems, are one of the most commonly used, clinically important antibiotics. In this study, the phenotypic and genotypic characteristics of 14 CTX-M-producing APEC were investigated. Two types of CTX-M genes were detected, namely, CTX-M-1 gene (8 isolates) and CTX-M-15 gene (6 isolates), and all CTX-M-producing APEC were multidrug resistant. Moreover, 10 of the 14 CTX-M-producing E. coli isolates carried the TEM-1 gene, and 8 of the 14 isolates contained class 1 integrons. The following three different gene cassette arrangements were identified in six isolates: aadA1 (n=2), dfrA1 (n=2), and aadA1+dfrA1 (n=2). All CTX-M-producing APEC isolates harbored IncF plasmids, including F, FII, FIA, and FIB. CTX-M-1 gene was located on I1, F, and FIB, and CTX-M-15 gene on FII, FIA, and FIB. The findings from this study indicate that E. coli carrying CTX-M gene are circulating in the broiler poultry industry. Comprehensive surveillance and persistent monitoring of the integrated broiler operations are warranted to prevent the dissemination of resistant isolates.
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