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Infectious Bursal Disease: Pathogenicity and Immunogenicity of Vaccines Rev. Bras. Ciênc. Avic.
Camilotti,E; Moraes,LB; Furian,TQ; Borges,KA; Moraes,HLS; Salle,CTP.
ABSTRACT The Infectious Bursal Disease (IBD) is a contagious viral disease that affects young chickens and may cause high morbidity and mortality. As the virus is very resistant to the environment, vaccination is required in case of high infection pressure. Due to variations in the virulence degree of the vaccines available to control IBD, this study aimed at evaluating the pathogenicity and immunogenicity of three types of vaccines. In total, 220 one-day-old specific pathogen free (SPF) chickens were immunized with recombinant, immune-complex and intermediate vaccines, or not vaccinated (55 birds per group) and challenged with IBD G11 strain on day 25. On days 25, 30, and 35, the Bursa of Fabricius (BF) were submitted to gross and histological...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Infectious Bursal Disease; Chickens; Vaccine; Immunity.
Ano: 2016 URL:
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