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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
Published by: Association of Schools of Public Health
Stable URL: http://www.jstor.org/stable/4593608
Page Count: 11
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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.
Public Health Reports (1896-1970) © 1969 Association of Schools of Public Health