Characterization of intestinal cnf1+ Escherichia coli from weaned pigs
作者： István Tóth , Eric Oswald , Jacques G. Mainil , Mohamed Awad-Masalmeh , Béla Nagy
DOI: 10.1016/S1438-4221(00)80019-3
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摘要: Escherichia coli isolated from 204 cases of porcine postweaning diarrhoea were tested by PCR for the genes cytotoxic necrotic factors (CNF) and cytolethal dystending toxin (CDT). Selected strains also examined presence papC-, sfa-, f17-, f18-, afa-specific sequences encoding P, S, F17, F18 fimbriae afimbrial adhesins. A 5.9% (12/204) had cnf1 gene, two them cdt gene as well. Further six cdt+ detected which cnf-negative. Most cnf1+ belonged to serogroups O2, O6, O8, O54 characteristic necrotoxic E. (NTEC) humans. All possessed P or S both, but negative F4, Results suggest that these enteric isolates may have entero- and/or uropathogenic significance in weaned pigs, zoonotic potential
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