Effect of Mycobacterium avium subsp. paratuberculosis serostatus on carcass weight and conformation and fat cover scores

  1. Ivan Mato 1
  2. Natividad Pesqueira 1
  3. Camino Factor 1
  4. Fernando Camino 2
  5. María L. Sanjuán 2
  6. Eduardo Yus 2
  7. Francisco J. Diéguez 2
  1. 1 ADSG Xundeva, Pontevedra, España
  2. 2 Universidade de Santiago de Compostela, España
Journal:
Spanish journal of agricultural research

ISSN: 1695-971X,  2171-9292

Year of publication: 2017

Volume: 15

Issue: 1

Type: Article

DOI: 10.5424/SJAR/2017151-10266 DIALNET GOOGLE SCHOLAR lock_openDialnet editor

More publications in: Spanish journal of agricultural research

Sustainable development goals

Abstract

The paper was designed to assess the influence of Mycobacterium avium subsp. paratuberculosis (MAP) infection status of cows at culling (antibody positive vs negative) on carcass traits: weight and conformation and fat cover scores. A generalized least squares linear model was used to assess the influence of MAP on weight. Subsequently, a random effects logistic regression was completed in order to model the relation between MAP and conformation score (fair vs poor carcasses). A random effects ordered logistic model was used to estimate the influence on fat cover. The results indicated that seropositives had carcass weights 58.45 (34.65-83.35) kg lower than seronegatives. Regarding conformation score, the odds of having poor conformation instead of fair was 3.85 (1.35-11.85) times higher in seropositives. The odds of seropositives achieving a higher fat cover was approximately 5 (1.41-9.09) times lower than the odds for seronegatives. The estimated effects could be useful when assessing the economic benefits of a paratuberculosis control program.

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