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Flagella from F18+Escherichia Coli Play a Role in Adhesion to Pig Epithelial Cell Lines

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Journal Microb Pathog
Date 2012 Oct 11
PMID 23046699
Citations 18
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Abstract

F18 fimbriae and toxins produced by F18 fimbriae-carrying Escherichia coli (E. coli) strains are known virulence factors responsible for post-weaning diarrhea (PWD) and edema disease (ED). In this study, we showed that fliC isogenic mutants constructed in two reference wild-type F18 fimbriae (F18+) E. coli were markedly impaired in adherence in vitro cell models (p < 0.05). Flagella purified from F18+E. coli could directly bind to cultured piglet epithelial cells and block adherence of F18+E. coli to cells when pre-incubated. In addition, the F18+E. coli fliC deletion mutants up-regulated the expression of type I fimbriae produced by F18+E. coli strains. These results demonstrated that expression of flagella is essential for the adherence of F18+E. coli in vitro.

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