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Bacteriologists Ida A. Bengston (1881-1952), on the left, and Alice C. Evans (1881-1975) were the first women employed on the scientific staff of the Hygienic Laboratory. Ida Bengston was particularly noted for her studies of bacterial toxins, especially the discovery of the organism Clostridium botulinum, which caused limberneck, a paralytic disease in chickens. Alice Evans identified undulant fever as a human form of abortive fever in cattle and traced its transmission to contaminated milk. This hastened the spread of the pasteurization movement in the United States.
c. 1940
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