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Pathogenic Escherichia coli strains commonly harbor genes involved in formation of fimbriae, such as the sfa II fimbrial gene cluster found in uropathogenic and newborn meningitis isolates. The sfaX II gene, located at the distal end of the sfa II operon, was recently shown to play a role in controlling virulence-related gene expression in extraintestinal pathogenic E. coli...
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