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Identification of Transmission Foci of Hydatid Disease in California

John C. Sawyer, Peter M. Schantz, Calvin W. Schwabe and Milton W. Newbold
Public Health Reports (1896-1970)
Vol. 84, No. 6 (Jun., 1969), pp. 531-541
DOI: 10.2307/4593608
Stable URL: http://www.jstor.org/stable/4593608
Page Count: 11
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Identification of Transmission Foci of Hydatid Disease in California
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Abstract

Epidemiologists in the School of Veterinary Medicine, University of California, Davis, found an appreciable level of hydatid (Echinococcus granulosus) infection--4.8 percent--in 22,720 ewes examined at slaughter in northern California during 1967-68. Heavily infected lots of sheep were traced by their lot numbers to Idaho and Utah and to eight ranches in four counties of California. On one California ranch, two cases of hydatid disease in human beings, at least one of them autochthonous, were disclosed. Seven of 17 sheep dogs examined on four of these California ranches were positive for E. granulosus. Transmission foci of hydatid disease have thus been identified for the first time in California and possibly for the first time in the United States exclusive of Alaska. All the owners of the infected premises were Basques or persons of Basque descent.

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