Periódicos Brasileiros em Medicina Veterinária e Zootecnia

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Benefícios na progênie com o uso de vacina oleosa para Salmonella Enteritidis em matrizes pesadas

Cony, Artur ValerioSantos, Luciana Ruschel dosMartello, EduardaNascimento, Vladimir Pinheiro do

Background: Bacteria of the genus Salmonella spp. are recognized as being one of the most common bacterial causes of foodborne disease. Its presence in chickens and hatching eggs is an important barrier to exports, besides posing a potential risk to human health. Companies producing broiler breeders aim at having excellent quality progeny for good hatching results and for providing healthy chicks. The use of inactivated, oily vaccines is one of the strategies to control Salmonella Enteritidis, by providing protection for broiler breeders. This protection can also benefit the progeny, so giving it some protection on the early period post-hatch. Thus, this study aimed at evaluating the benefits on the progeny of the use of inactivated, oily vaccine for Salmonella Enteritidis in broiler breeders.Materials, Methods & Results: Inactivated, oily Salmonella Enteritidis vaccine was injected in eight, and 19 weeks old breeder birds. Monitoring for Salmonella was performed by the use of drag swabs, two per each house, and 10 cloacal swabs by each poultry house, where each swab represented a pool of three birds sampled. In the hatchery, monitoring for Salmonella was performed on each lot, where each sample consisted of 10 pipped eggs per lot (850 samples) and 10 stillbirth chicks (850 samples), totaling 1.700 samples altogether. From the 850 pipped eggs samples, 1.18% were positive in vaccinated batches while 33.88% were positive in non-vaccinated batches. Regarding the 850 samples of stillbirth chicks, 1.88% were positive in vaccinated batches and 24.70% were positive in non-vaccinated batches. The percentage of Salmonella positive flocks in drag swabs collected from houses with broilers descending from non-vaccinated mothers was 4.38% (502 swabs), while those originated from vaccinated mothers showed a positivity of 1.26% (475 swabs).[...](AU)

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