Cow-level prevalence of paratuberculosis in culled dairy cows in Atlantic Canada and Maine

Cow-level prevalence of paratuberculosis in culled ...

Title	Cow-level prevalence of paratuberculosis in culled dairy cows in Atlantic Canada and Maine
Author(s)	S. McKenna, G. Keefe, H. Barkema, J. McClure, J. VanLeeuwen, P. Hanna, D. Sockett
Journal	Journal of dairy science
Date	2004
Volume	87
Issue	11
Start page	3770
End page	3777
Abstract	The prevalence of Mycobacterium avium ssp. paratuberculosis (Mptb) in culled dairy cattle in Eastern Canada and Maine was determined to be 16.1% (95% confidence interval 13.8 to 18.3%) based on a systematic random sample of abattoir cattle. Mesenteric lymph nodes and ileum from 984 cows were examined by histologic and bacteriologic methods. Histological testing was far less sensitive than bacteriologic methods for detecting infected cattle. A seasonal pattern of positive cows was also detected, with the highest proportion of cows being Mptb-positive in June (42.5%). Overall, body condition score was not associated with prevalence of Mptb isolation.
ISSN	0022-0302
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