A study of relationships among F17 a producing enterotoxigenic and non-enterotoxigenic Escherichia coli strains isolated from diarrheic calves |
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| Institution: | 1. School of Food Science, Irrigated Agriculture Research and Experiment Center, Washington State University, Prosser, Washington 99350;;2. Department of Entomology and Plant Pathology;3. Department of Food Science;4. Department of Biosystems Engineering and Soil Science, and;5. Department of Plant Sciences, University of Tennessee, Knoxville, 37996, USA;1. Department of Microbiology, Faculty of Veterinary Medicine, Selcuk University, Konya, Turkey;2. Department of Food Technology, Sarayonu Vocational School, Selcuk University, 42430, Konya, Turkey |
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| Abstract: | We investigated the clonal relationships among 41 enterotoxigenic (ETEC) or non-enterotoxigenic (NETEC) Escherichia coli strains producing the F17 a fimbriae isolated from diarrheic calves in France or Belgium in the early 1980s. Twenty-three of the 26 ETEC strains were highly clonally related, most of them with a O101:K32:H9-serotype. The NETEC strains were also divided in clonal subgroups, most of them with O101:H-serotype. The F17 a positive ETEC strains are no longer isolated from diarrheic calves in these countries. It is postulated that the use of a vaccine including O101, K32 and H9 antigens in addition to K99 (F5) explains the strongly reduced isolation of the O101:K32:H9, K99 (F5) E. coli clone. |
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