期刊
PREVENTIVE VETERINARY MEDICINE
卷 132, 期 -, 页码 98-106出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.prevetmed.2016.08.010
关键词
Ostertagia spp.; Rumen fluke; F. hepatica; Co-infection; Beef production impact; Multilevel modelling
资金
- AHDB Beef and Lamb
- AHDB Dairy
This study aims at investigating the occurrence, risk factors and production impacts on beef carcass parameters of three of the most important cattle helminth infections in England and Wales. Abomasa, reticulorumens and livers from healthy cattle were collected and examined post-mortem quarterly over a one year period in an abattoir in South-West England. Specific viscera from 974 cattle were collected, examined and scored for Ostertagia spp., adult rumen fluke and liver fluke lesions/presence. A total of 89%, 25% and 29% of the carcasses had lesions/presence of Ostertagia spp., rumen fluke and liver fluke, respectively, and 39% had presence of helminth co-infection. Animal demographic and carcass parameters associated with helminth infections were investigated using multilevel multinomial and multilevel linear mixed models respectively. After adjusting for other factors, significant differences in the distribution of helminth infections were observed among cattle by type of breed, animal category (cow, heifer, steer and young bull), age, season and concurrent helminth infections. Compared to carcasses free of helminths, carcasses presenting solely Ostertagia Spp. lesions or adult rumen fluke had significantly lower cold carcass weight (coef.: 30.58 [-50.92;-10.24] and 50.34 [-88.50;-12.18]) and fat coverage (coef.: 3.28 [-5.56;-1.00] and 5.49 [-10.28;-0.69]) and carcasses presenting solely liver fluke lesions had significantly lower conformation grade (coef.: 3.65 [-6.98;-0.32]). Presence of helminth poly-infections was negatively associated with cold carcass weight. (C) 2016 Elsevier B.V. All rights reserved.
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