Production Effects of Mycobacterium avium subspecies paratuberculosis Infection Based on Diagnostic Test Results

Authors

  • J. E. Lombard USDA:APHIS:VS; Centers for Epidemiology and Animal Health, Fort Collins, CO
  • B. A Wagner USDA:APHIS:VS; Centers for Epidemiology and Animal Health, Fort Collins, CO
  • B. J. McCluskey USDA:APHIS:VS; Centers for Epidemiology and Animal Health, Fort Collins, CO
  • F. B. Garry Integrated Livestock Management, Colorado State University, Fort Collins, CO

DOI:

https://doi.org/10.21423/aabppro20054854

Keywords:

Mycobacterium avium paratuberculosis, milk production, serum-ELISA

Abstract

Several studies have evaluated the production effects of Mycobacterium avium subspecies paratuberculosis (MAP) infection with various outcomes. Some studies have reported up to an 18% reduction in milk production for fecal-culture-positive cows compared to fecal-culture-negative cows. A4% reduction in milk production was observed in serum-ELISA-positive cows compared to test-negative cows in one study, while other studies have reported no differences between test-negative and test-positive cows. Most of these studies were restricted to a small region of the US and a relatively small number of operations.

Cover image of the 38th Conference Proceedings: A cow nuzzles her newborn calf in a stall with straw bedding. Both are content. Yellow background.

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Published

2005-09-24

Issue

2005

Section

Research Summaries 3

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