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KMID : 1101420150470020071
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Korean Journal of Clinical Laboratory Science
2015 Volume.47 No. 2 p.71 ~ p.77
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Molecular Characterization of Escherichia coli Isolates from Humans and Chickens in the Chungcheong Area Using MLST Analysis
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Kim Se-Mi
Sung Ji-Youn
Choi Seung-Gu
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Abstract
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Antimicrobial resistant bacteria has recently emerged and been disseminated in livestock environments because of excessive use of antimicrobial agents for the therapeutic and growth promotion purposes to food animals. In particular, there is potential for multidrug-resistant bacteria that can be transmitted from animals to mankind. In this study, we investigated the genotypes of E. coli strains isolated from humans and chickens using multi-locus sequence typing (MLST) and antimicrobial resistance patterns by disk diffusion method along with integron study involving antimicrobial resistance mechanisms. From July 2013 to July 2014, E. coli strains isolated from clinical specimens (n=44) and poultry chickens (n=34). ST131 (n=20) was most common in human-derived E. coli. ST752 (n=7) was most common in chicken-derived E. coli, with four isolates each for ST117, ST189, and ST69. Of the 44 E. coli strains isolated from humans, 25 of had a class 1 integron, as opposed to only 11 of 34 strains in the E. coli isolated from chickens. There were differences in genotypes and antimicrobial resistance patterns between the chicken-derived and the human-derived E. coli.
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KEYWORD
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MLST, Integron, E. coli, Chickens
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