Epidemiologic Characteristics of Infant Botulism in the United States, 1975–1978

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Abstract
Between January 1, 1975, and July 31, 1978, 81 cases (47 type A, 34 type B) of infant botulism were reported to the Center for Disease Control (CDC), Atlanta, Georgia. Most cases occurred in the western states, with the majority in California and Utah, where active surveillance is in progress. Most of the cases reported have occurred in the fall months, but this pattern may be attributable to a reporting artifact. The median age at onset of illness was 10 weeks, with a range of three to 35 weeks. The case-fatality ratio was 3.7% (3 of 81). CDC has developed a reporting form for case investigation and has encouraged private physicians and state and territorial epidemiologists and laboratory directors to keep active surveillance of cases of infant botulism. State health departments and CDC are available for consultation regarding suspected cases of the illness.

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