Lack of detectable shedding of Cryptosporidium parvum oocysts by periparturient dairy cattle |
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| Authors: | Atwill E R Pereira M das G C |
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| Institution: | Veterinary Medicine Teaching and Research Center, School of Veterinary Medicine, University of California-Davis, Tulare, California 93274, USA. ratwill@vmtrc.ucdavis.edu |
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| 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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