Antimicrobial resistance of Escherichia coli causing edema disease in post-weaning pigs in Vinh Long province

Ly Thi Lien Khai * and Le Trinh Cam Lai

* Corresponding author (ltlkhai@ctu.edu.vn)

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Received: 01 Oct 2018
Revised: 11 Apr 2019
Accepted: 30 Aug 2019
Published: 31 Jul 2019
DOI: 10.22144/ctu.jen.2019.017
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Ly, T. L. K., & Le, T. C. L. (2019). Antimicrobial resistance of Escherichia coli causing edema disease in post-weaning pigs in Vinh Long province. CTU Journal of Innovation and Sustainable Development , 11(2), 1-8. https://doi.org/10.22144/ctu.jen.2019.017
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Vol. 11 No. 2 (2019)

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Abstract

The study was conducted to determine the antimicrobial resistance of Escherichia coli which causes edema disease in post weaning pigs in Vinh Long province. In a total of 769 piglets, the E. coli positive rate was 19.51% from 150/769 piglet diseases. There was 86/150 piglets died in high rate (57.33%). The result showed that the ratio of post weaning pigs at 1-2 weeks infection after weaned (66.95%) was higher than that at over 2 weeks (33.05%). The ratio of E. coli isolated from piglets at households (61.02%) was higher than the farms (38.98%). The most common symptoms were swollen eyelids (100%), followed by swollen head (83.90%), moved convulsions (82.20%). The lesions as fluid accumulate in abdominal capacity (97.67), mesenteries hemorrhage (96.51%) and small intestines hemorrhage (96.51%) were common. Positive rate of gene encoding virulent factor Stx2e in post weaning pigs was quite high (42.37%). E. coli strains were highly resistant to ampicillin (92%) and bactrim (77%), followed by streptomycin (68%), gentamycin (50%). The 117/118 strains were multi-resistant to 2-7 antibiotics with 66 different resistant phenotypes and diversified and complicated multi-resistant phenotype. E. coli was till sensitive to ceftazidime, cefuroxime, amikacin and amoxicillin-clavulanic acid. This is the first study of the gene encoding virulent factor Stx2e causing edema disease in post weaning pigs in Vinh Long province.
Keywords: antimicrobial resistance, Escherichia coli, edema disease, piglet, Vinh Long

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