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Newcastle disease in white Pekin ducks: response to experimental vaccination and challenge Rev. Bras. Ciênc. Avic.
Nishizawa,M; Paulillo,AC; Nakaghi,LSO; Nunes,AD; Campioni,JM; Doretto Júnior,L.
A total of 120 Pekin ducks were distributed at random into four experimental groups, vaccinated or not against Newcastle disease (ND): G1 (Ulster 2C strain), G2 (B1 strain), G3 (LaSota strain), and G4 (nonvaccinated group). At 60 days of age, all groups were challenged with a pathogenic ND virus (NDV) suspension, and a group of specific pathogen free (SPF) chicks (G5) was also inoculated. Cloacal and tracheal swabs from all birds were collected after six, 14, 20, and 30 days post-challenge for virus isolation. NDV was isolated in 100% of SPF chicks. Pekin ducks from all groups, vaccinated or not, did not show any ND clinical signs, demonstrating that these birds are not susceptible to ND clinical disease. In the control group (G4), the virus was isolated...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Anas platyrhynchos; NDV carrier; Newcastle disease; Pekin duck; Vaccination.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2007000200008
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