Journal article
Cryptosporidia on dairy farms and the role these farms may have in contaminating surface water supplies in the northeastern United States
Preventive veterinary medicine, Vol.43(4), pp.253-267
2000
Handle:
https://hdl.handle.net/2376/111171
PMID: 10718494
Abstract
The prevalence and risk factors for shedding of cryptosporidia by dairy cattle and calves and the prevalence and risk factors for cryptosporidia in surface waters associated with dairy farms were determined for a well-defined watershed in the northeastern United States. Eleven dairy farms were enrolled in the study and subjected to monthly sampling over a 6-month period. Animal-, water-, and manure-management practices were determined by survey and fecal, on-farm water, and stream samples were obtained monthly and evaluated for the presence of cryptosporidia. Ninety-one percent of the dairy farms in our study had
Cryptosporidium on their premises. Fifteen percent of the sampled calves 0–3 weeks of age were shedding cryptosporidia. The risk factors for calves shedding cryptosporidia were contact between calves and frequent bedding changes. The probability of shedding cryptosporidia decreased with age. Nine percent of farm-associated stream samples were cryptosporidia-positive. The single risk factor for detecting cryptosporidia in surface water was increasing frequency of spreading of manure on fields. The probability of detecting cryptosporidia in streams decreased as 5-day cumulative precipitation increased. There were no animal-associated or barnyard-management features associated with detecting cryptosporidia in farm-impacted streams.
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Details
- Title
- Cryptosporidia on dairy farms and the role these farms may have in contaminating surface water supplies in the northeastern United States
- Creators
- W.M Sischo - Veterinary Medical Teaching and Research Center, 18830 Road 112, University of California, Tulare, CA 93274, USAE.R Atwill - Veterinary Medical Teaching and Research Center, 18830 Road 112, University of California, Tulare, CA 93274, USAL.E Lanyon - Department of Agronomy, Penn State, University Park, PA, USAJ George - Veterinary Medical Teaching and Research Center, 18830 Road 112, University of California, Tulare, CA 93274, USA
- Publication Details
- Preventive veterinary medicine, Vol.43(4), pp.253-267
- Academic Unit
- UNKNOWN
- Publisher
- Elsevier B.V
- Identifiers
- 99900547347001842
- Language
- English
- Resource Type
- Journal article