Prevalence of Cryptosporidium infection in dairy calves in western Washington |
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| Authors: | J E Ongerth H H Stibbs |
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| Institution: | Department of Environmental Health, School of Public Health and Community Medicine, University of Washington, Seattle 98195. |
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| Abstract: | The prevalence and intensity of Cryptosporidium infection were examined in 445 Holstein calves at 10 dairy farms in western Washington, near Seattle. Fifty-one percent (176) of calves in the 7- to 21-day-old age group (n = 342) were positive for oocysts in the feces by carbolfuchsin staining. Prevalence and intensity of infection were highest in calves 8 to 14 days old; prevalence was 60% in this group, and 48% of the Cryptosporidium-positive calves had oocyst shedding at a 4+ level. A seasonal pattern in prevalence was not evident. |
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