Diarrhea Associated With Adherent Enteropathogenic Escherichia coli in an Infant and Toddler Center, Seattle, Washington

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Abstract
During November 1983, the Seattle-King County Department of Public Health investigated an outbreak of diarrhea associated with enteropathogenic Escherichia coli, serogroup 0111:K58, in an infant and toddler day-care center. Of the 25 children in the center, ranging in age from 4 to 30 months (median age 11 months), diarrhea occurred in 14 characterized by watery, greenish stools. The median duration of diarrhea was 12 days. Two of the ill children were hospitalized because of severe dehydration. Stool cultures from the children diagnosed initially did not yield the common bacterial pathogens, parasites, or rotavirus. Stool cultures from 11 of 14 ill children and two of 11 well children (P <.005), however, yielded an E coli serogroup, 0111: K58, which was not invasive or toxigenic by standard tests. The source of the organism was not identified. Although this organism has been recognized as a cause of diarrhea in newborn nurseries, this is the first published report of a documented outbreak of enteropathogenic E coli-induced diarrhea in a day-care center in the United States.
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