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Outbreak of Enterotoxigenic Escherichia coli Infection with an Unusually Long Duration of Illness. Clin Infect Dis 42

By Jonathan S. Yoder, Shawn Cesario, Victor Plotkin, Xinfang Ma, Kate Kelly-shannon and Mark S. Dworkin

Abstract

(See the editorial commentary by Mintz on pages 1518–20) Background. Enterotoxigenic Escherichia coli (ETEC) is an emerging cause of foodborne outbreaks of infection in the United States, yet its epidemiology is not completely understood. Methods. In September 2004, we investigated an outbreak of infection due to ETEC at an Illinois corporation following a meal served to ∼700 employees. Clinical samples were negative for enteric pathogens and were tested for ETEC using stool culture and polymerase chain reaction (PCR). An environmental investigation was conducted to determine whether food-service practices or conditions led to this outbreak. A case of illness caused by ETEC was defined as onset of diarrhea and 1 of the following symptoms during 23–30 September 2004: cramps, vomiting, nausea, headache, or weight loss. Results. The 111 ill employees interviewed had only 1 meal in common. Cucumber salad and noodle salad from that meal were associated with illness; no food was available for testing. A PCR test for ETEC in stool was positive in samples from 6 of 11 patients; 3 ETEC serotypes were detected. The environmental investigation revealed no critical violations. The median duration of diarrhea (7 days) was longer than that observed for the majority of outbreaks of ETEC infection (4 days) and was associated with consumption of carbonated beverages (odds ratio, 4.5; 95 % confidence interval, 2.0–10.3)

Year: 2006
OAI identifier: oai:CiteSeerX.psu:10.1.1.943.8506
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