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Cholera Strengthened by Trip Through Gut

INFECTIOUS DISEASEMicrobiologists have discovered that the human gut seems to prime the bacteria responsible for cholera. Before Vibrio cholerae exit the body in watery stools, something about the intestinal environment causes them to rev up the activity of certain genes. These genes, in turn, seem to prepare them for ever more effective colonization of their next victims, possibly fueling epidemics, they report in the 6 June issue of Nature .