Publication: Quantitative estimation of the impact of caprine arthritis encephalitis virus infection on milk production by dairy goats
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Date
2013-02-04
Authors
Martínez-Navalón, Bernardo ; Peris, Cristòfol ; Gómez, Ernesto A. ; Peris, Bernat ; Roche, María Luz ; Caballero, Concepción ; Berriatua Fernández de Larrea, Eduardo ; Goyena Salgado, Elena
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Publisher
Elsevier
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DOI
http://doi.org/10.1016/j.tvjl.2012.12.020
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info:eu-repo/semantics/article
Description
© 2013 Elsevier Ltd. All rights reserved. This document is the Published version of a Published Work that appeared in final form in The Veterinary Journal. To access the final edited and published work see https://doi.org/10.1016/j.tvjl.2012.12.020
Abstract
This retrospective study investigated milk production losses associated with serological evidence (serostatus) of caprine arthritis encephalitis virus (CAEV) infection over one lactation in 4543 Murciano-Granadina goats from 22 herds in Spain. The seroprevalence of infection was 18%, ranging from 0% to 2% in 11 herds, 7% to 60% in 10 herds and was 100% in one herd. Seropositive does had significantly shorter lactations, produced less milk and milk fat, lactose and dry extract and had higher somatic cell counts than their seronegative counterparts, although differences in milk production between seropositive and sero negative animals were noted between herds. Mixed regression models confirmed the association between CAEV seropositivity and reduced milk
production. The adjusted, least squares mean (LSM) test-day milk yield was 10% less in seropositive com pared to seronegative does and this difference varied according to lactation number. In contrast, differ ences in the LSM of milk fat, lactose and dry extract percentages between seropositive and
seronegative goats were only between 0.1% and 0.2% and did not increase with lactation number. The
findings of this study provide strong evidence that CAEV-infection can be a major cause of reduction
in milk yield in goats and its control should be considered as part of dairy goat herd health schemes.
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Citation
The Veterinary Journal 197 (2013) 311–317
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