Imbalance in gut bacteria may play role in Crohn’s disease
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Strains of E. coli (one shown) have been linked to Crohn's disease. The bacterium is part of a larger family, Enterobacteriaceae, which, when more abundant than other "good" bacteria in the gut, could be a sign of the onset of the inflammatory bowel disease, research suggests.
Dr. W.A. Clark/CDC