Foodborne outbreak of gastroenteritis caused by Escherichia coli O157:H7--North Dakota, 1990.

In late July and early August 1990, an outbreak of gastroenteritis occurred among persons who had eaten a meal while attending an agricultural threshing show in North Dakota on July 28-29. At least 70 (3.5%) of the more than 2000 attendees were affected; of these, 16 persons were hospitalized, and two children, aged 2 and 8 years, were diagnosed with hemolytic uremic syndrome. An epidemiologic investigation was conducted by the North Dakota State Department of Health and Consolidated Laboratories.(ABSTRACT TRUNCATED AT 250 WORDS)