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Department of Medicine, Section of Digestive and Liver Diseases, University of Illinois at Chicago, West Side Department of Veterans Affairs Medical Center, Chicago, Illinois 60612
Enteropathogenic Escherichia coli (EPEC) is primarily associated with infantile diarrhea in developing countries. This intriguing pathogen exerts numerous physiological effects on its host target tissue, the intestinal epithelium, all from an extracellular location. Expression of a type III secretory apparatus allows this organism to transfer bacterial effector molecules directly into host cells. As a result of EPEC attachment to and/or translocation of proteins into intestinal epithelial cells, many signaling cascades are activated. Ultimately, host functions are perturbed, including alteration of ion transport, disruption of the tight junction barrier, and activation of the inflammatory response.
enteric pathogens; ion transport; tight junctions; inflammation; intestinal epithelium
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