According to the World Health Organization, enterotoxigenic Escherichia coli (ETEC) bacteria cause the largest number of recorded community-acquired cases of childhood diarrhea in the developing world and is the most common culprit in traveler's diarrhea. While in healthy adults this is merely an unpleasant inconvenience, in infants and young children this can lead to chronic malnutrition, stunted growth and impaired cognitive function.
