| Autor: |
Ivan Mato, Natividad Pesqueira, Camino Factor, Fernando Camino, María L Sanjuán, Eduardo Yus, Francisco J. Diéguez |
| Jazyk: |
angličtina |
| Rok vydání: |
2017 |
| Předmět: |
|
| Zdroj: |
Spanish Journal of Agricultural Research, Vol 15, Iss 1, Pp e0502-e0502 (2017) |
| Druh dokumentu: |
article |
| ISSN: |
2171-9292 |
| DOI: |
10.5424/sjar/2017151-10266 |
| Popis: |
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. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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