Journal
INFECTION GENETICS AND EVOLUTION
Volume 65, Issue -, Pages 392-398Publisher
ELSEVIER
DOI: 10.1016/j.meegid.2018.08.026
Keywords
E. coli; Pathogenic; Drug resistance; Virulence genes; Resistance genes
Categories
Funding
- Earmarked Fund for Modern Agro-industry Technology Research System [CARS-40]
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Extraintestinal pathogenic Escherichia toll (ExPEC) are important human pathogens responsible for urinary tract infection and meningitis. Therefore, infection of chickens by highly pathogenic E. coli. with multi-drug resistance has become a major concern to food safety. In this study, we isolated a strain of E. coli. (HB2016) from the oviduct of a diseased chicken with colibacillosis. Inoculation of chickens with 2 x 10(6) CFU of the isolate E. coli. HB2016 by intraperitoneal injection successfully reproduced colibacillosis in chickens. We also found that E. coli. HB2016 harbored four more virulence genes (tsh, trat, cvaC and cvaA/B) than E. coli. reference strain CVCC1428. Importantly, E. coll. HB2016 was resistant to cefuroxime, tobramycin, medemycin, cefazolin, cefoperazone, streptomycin and ampicillin, and carried multiple antibiotic resistance genes such as strA, strB, bla(CMY-2), bla(CTX-M-19), b1a(TEM-1B), fosA, mph(A), floR, sul2, tet(A) and tet(B). These findings suggest that the causative E. coli. act as a potential zoonotic agent affecting human health.
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