Characterization of virulence genes of enteroinvasive Escherichia coli by TnphoA mutagenesis: identification of invX, a gene required for entry into HEp-2 cells.

Abstract excerpt

While enteroinvasive Escherichia coli (EIEC) and shigellae are genotypically nearly identical, a difference has been reported in the infective dose to humans: EIEC is 10,000-fold less infectious than shigellae. A possible basis for this difference lies in the inherent invasiveness of these bacteria toward epithelial cells. Thus, despite the high degree of homology between the invasion plasmids of EIEC and...

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