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

• Published in: Can Tho University Journal of Science Vol. 11; no. 2
• Main Authors: Thi Lien Khai Ly, Trinh Cam Lai Le
• Format: Journal Article
• Language: English
• Published: CAN THO UNIVERSITY PUBLISHING HOUSE 01.07.2019
• Subjects: antimicrobial resistance; edema disease; Escherichia coli; piglet; Vinh Long
• ISSN: 2615-9422; 2815-5602
• DOI: 10.22144/ctu.jen.2019.017

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.