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Effect of Infectious Bursal Disease (Ibd) Vaccines on Infection of Salmonella Heidelberg in Broiler Chickens Rev. Bras. Ciênc. Avic.
Marín-Gómez,SY; Martins,NRS; Fernando,FS; Coelho,HLG; Freitas Neto,OC.
ABSTRACT Salmonella Heidelberg (SH) has represented a great concern to the Brazilian poultry industry in the last years. It is known that immunosuppression in poultry is a contributing factor to increase Salmonella faecal shedding and to disturb control programmes. Not only infectious bursal disease (IBD) virus but also some live vaccines have been reported to induce immunosuppression. In the present study we assessed the effects of two live vaccines against IBD on SH-infected broiler chicks. At 7 days of age, birds of three groups (vaccinated with recombinant HVT-IBD vector, with immune complex-IBD vaccine and unvaccinated) were orally challenged with 1 x 108 CFU of SH. A group of hatchmates remained unvaccinated/unchallenged to serve as negative...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Salmonella; Faecal colonization; HVT-VP2 vector; Immune-complex; Depletion.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2020000100321
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