Observations on production of hemolysin, heat-labile enterotoxin and antimicrobial drug resistance among enterotoxigenic Escherichia coli from pigs. |
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Authors: | H. Hariharan S. Heaney J. Bryenton J. Daley |
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Affiliation: | Department of Pathology and Microbiology, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown PEI, Canada CIA 4P3 |
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Abstract: | A total of 52 isolates of Escherichia coli belonging to enterotoxigenic serotypes from piglets with diarrhea were examined for hemolysis, production of cholera-like enterotoxin (LT) and susceptibility to 10 antimicrobial drugs. A strong association between production of LT and hemolysis was seen. Ninety percent of 29 hemolylic isolates were LT+ whereas 100% of 23 nonhemolytic isolates were LT− in a commercial latex agglutination assay. Antimicrobial susceptibility tests employing disc diffusion showed that resistance to trimethoprim-sulfamethoxazole (TMS), neomycin and tetracycline was significantly less among LT+ isolates compared to LT− ones. Enrofloxacin was the only antimicrobial drug to which all the 52 isolates were susceptible. |
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Keywords: | Hemolysin enterotoxigenic heat-labile toxin (LT) drug resistance Escherichia coli pigsAuthor Keywords: Hémolysine entérotoxigénique toxine sensible à la chaleur (LT) antibioresistance Escherichia coli porcs |
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