Schematic representation of the contribution of SslE to <i>E.coli</i> pathogenesis.

Abstract

<p>Gut mucus forms two layers, an inner firm mucus layer devoid of bacteria, and an outer layer that is not sterile and is a major habitat for commensal bacteria. <i>E. coli</i> can penetrate this barrier through the SslE-mediated enzymatic degradation of the mucus, targeting epithelial cells. This interaction will eventually lead to IL-8 release and neutrophils recruitment.</p