Open AccessEffect of Mycobacterium avium subsp. paratuberculosis serostatus on carcass weight and conformation and fat cover scores
Author(s) -
Ivan Mato,
Natividad Pesqueira,
Camino Factor,
F. Camino,
María Luisa Sanjuán Hernán-Pérez,
Eduardo Yus Respaldiza,
Francisco Javier Diéguez Casalta
Publication year - 2017
Publication title -
spanish journal of agricultural research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.337
H-Index - 36
eISSN - 2171-9292
pISSN - 1695-971X
DOI - 10.5424/sjar/2017151-10266
Subject(s) - paratuberculosis , odds , logistic regression , mycobacterium avium subsp. paratuberculosis , odds ratio , medicine , veterinary medicine , zoology , cover (algebra) , biology , mycobacterium , pathology , tuberculosis , mechanical engineering , engineering
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