Lack of Detectable Shedding of Cryptosporidium parvum Oocysts by Periparturient Dairy Cattle

E. R. Atwill; Mdas G C. Pereira

doi:10.1645/GE-3192RN

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E. R. Atwill,¹ Mdas G C. Pereira¹

¹Veterinary Medicine Teaching and Research Center, School of Veterinary Medicine, University of California–Davis, Tulare, California 93274. ratwill@vmtrc.ucdavis.edu

Abstract

We examined whether periparturient dairy cattle shed Cryptosporidium parvum oocysts within 12 hr of calving on 3 commercial dairy farms endemic for calfhood cryptosporidiosis. Using a diagnostic method that can detect as few as 1 oocyst per gram of feces, we found no evidence of C. parvum oocysts in 86 fecal samples collected within 12 hr of calving from 43 dairy cows.

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E. R. Atwill and Mdas G C. Pereira "Lack of Detectable Shedding of Cryptosporidium parvum Oocysts by Periparturient Dairy Cattle," Journal of Parasitology 89(6), 1234-1236, (1 December 2003). https://doi.org/10.1645/GE-3192RN

Published: 1 December 2003

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