Risk of Drinking-water Outbreaks of Cryptosporidiosis in Humans Caused by Cattle in Watersheds

There are at least two genotypes of Cryptosporidium paruum in nature-one that has only been isolated from humans (the H genotype) and one that has been isolated from a large range of mammals, including cattle and humans (the C genotype). By virtue of their presence in watersheds and the potential fo...

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Published inAmerican Association of Bovine Practitioners. Conference. Proceedings of the ... Annual Conference p. 177
Main Authors Nydam, Daryl V., Lindergard, Gabbi, Wade, Susan E., Schaaf, Stephanie L., Mohammed, Hussni O.
Format Journal Article Trade Publication Article
LanguageEnglish
Published Stillwater American Phytopathological Society 26.09.2002
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Summary:There are at least two genotypes of Cryptosporidium paruum in nature-one that has only been isolated from humans (the H genotype) and one that has been isolated from a large range of mammals, including cattle and humans (the C genotype). By virtue of their presence in watersheds and the potential for water contamination with manure, cattle have often been implicated as a source of oocysts for human outbreaks of cryptosporidiosis. A recent review of drinking-water outbreaks in North America indicated that none in the United States and only one in British Columbia, Canada were associated with the C genotype. Thus, the objective of this study was to determine prevalence of C. paruum genotypes Hand C in dairy herds in the New York City Watershed (NYCW) and illustrate the risk posed by cattle to water-drinkers in this area.
ISSN:1079-9737
DOI:10.21423/aabppro20025037