Abstract
A tularemia epizootic occurred in aquatic mammals in Waterton Lakes National ParK, Alta., during the winter of 1952-53. Pasteurella tularense was isolated from tissues of beaver (Castor canadensis), muskrat (Ondatra zibethica), and from two water samples taken from affected streams. The course of the outbreak, including the contamination of the streams, resembled conditions described in northwestern United States by Parker, Steinhaus, Kohls, and Jellison.
Published Version
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