PMID: 15239481Jul 9, 2004Paper

Seroprevalence of Mycobacterium avium subsp paratuberculosis infection among dairy cows in Colorado and herd-level risk factors for seropositivity

Journal of the American Veterinary Medical Association
Heather L HirstGregory M Goodell

Abstract

To estimate seroprevalence of Mycobacterium avium subsp paratuberculosis (MAP) infection among adult dairy cows in Colorado and determine herd-level factors associated with the risk that individual cows would be seropositive. Cross-sectional observational study. 10,280 adult (> or = 2 years old) dairy cows in 15 herds in Colorado. Serum samples were tested with a commercial ELISA. A herd was considered to be infected with MAP if results of mycobacterial culture of > or = 1 individual cow fecal sample were positive or if > or = 1 culled cow had histologic evidence of MAP infection. 424 of the 10,280 (4.12%) cows were seropositive. Within-herd prevalence of seropositive cows ranged from 0% to 7.82% (mean, 2.6%). Infection was confirmed in 11 dairies. Cows in herds that had imported > or = 8% of their current herd size annually during the preceding 5 years were 3.28 times as likely to be seropositive as were cows in herds that imported < 8%. Cows in herds with > or = 600 lactating cows were 3.12 times as likely to be seropositive as were cows in herds with < 600 lactating cows. Cows in herds with a history of clinical signs of MAP infection were 2.27 times as likely to be seropositive as were cows in herds without clinical signs. ...Continue Reading

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Citations

Aug 5, 2008·Applied and Environmental Microbiology·Stella Y Y WongChen Situ
Jan 1, 2006·Irish Veterinary Journal·Maarten F Weber
May 26, 2009·Preventive Veterinary Medicine·R B PillarsJ B Kaneene
Jun 22, 2006·Preventive Veterinary Medicine·Steven H HendrickDavid F Kelton
Jun 3, 2009·Journal of Applied Microbiology·M M EltholthF J Guitian
Sep 9, 2017·Tropical Animal Health and Production·I F EspeschitM A S Moreira
Jun 16, 2015·Journal of Dairy Science·A B Garcia, L Shalloo
Mar 8, 2011·Journal of Food Protection·C O GillW J Meadus
Aug 31, 2020·Comparative Immunology, Microbiology and Infectious Diseases·Abdelfattah SelimAmir Abdelrahman

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