RESUMEN
A vertically integrated monitoring program was set up for breeders hatched in 2013 and their offspring to detect differences in performance related to the reovirus vaccination schedule. Within the same organization in Belgium, 17 breeder flocks were vaccinated with one dose of live and one dose of inactivated reovirus vaccine, while 14 flocks received two doses of inactivated vaccine without live priming. The hatchability of the eggs produced by these birds was examined. Further, the daily growth, feed conversion, mortality, slaughterhouse condemnation, production index, and antibiotic use were monitored in 110 broiler flocks derived from the breeders. All gathered data were examined statistically. In eggs obtained from breeders vaccinated twice with inactivated reovirus vaccine, a significant 2.88% higher hatchability rate was observed. The progeny broiler flocks of these breeders showed a significant 18.2% lower mortality during the fattening period. Although not statistically significant, the slaughterhouse condemnation rate was 10.1% lower as well. The results may indicate that-under the epidemiologic conditions of this study-double administration of inactivated reovirus vaccine in broiler breeders can at least contribute to higher hatchability of breeder eggs and lower broiler mortality.
Asunto(s)
Enfermedades de las Aves de Corral/inmunología , Infecciones por Reoviridae/veterinaria , Reoviridae/inmunología , Vacunas Virales/administración & dosificación , Vacunas Virales/inmunología , Animales , Pollos , Enfermedades de las Aves de Corral/prevención & control , Enfermedades de las Aves de Corral/virología , Reoviridae/genética , Reoviridae/aislamiento & purificación , Infecciones por Reoviridae/inmunología , Infecciones por Reoviridae/prevención & control , Infecciones por Reoviridae/virología , VacunaciónRESUMEN
During a field study in 2010 the daily growth, feed conversion, first-week mortality, broiler loss due to mortality and slaughterhouse condemnation, and production index were monitored in 100 broiler flocks derived from four breeder farms vaccinated with Nobilis OR inac and four Ornithobacterium rhinotracheale-unvaccinated breeder farms of the same organization in Belgium. Other parameters related to the broiler flocks, such as flock size, season, age of the breeders, and corresponding breeder farms, were also noted. All gathered data were examined with ANOVA, linear correlation, and linear regression analyses. Results demonstrated a significant 22.3% lower broiler loss and a significant 3.9% higher production index in the broiler flocks derived from breeders vaccinated with Nobilis OR inac. These results confirm field observations obtained in 1999, thereby providing further evidence for an effect of O. rhinotracheale vaccination in breeders with regard to the improved performance of broilers.