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Títulos de anticorpos contra o vírus da doença de Newcastle em três diferentes sistemas de criação avícola na região de Feira de Santana-Bahia

2007; UNIVERSIDADE FEDERAL DA BAHIA; Volume: 8; Issue: 4 Linguagem: Inglês

1519-9940

Tatiane Santana Sales, Elen Fabiane Guimarães Herval, André Eduardo Rocha César, Thaís de Brito Batinga, Priscila Sousa da Silva, Izabella Ramos da Luz, Paulo César Costa Maia, Lia Muniz Barretto Fernandes,

Virology and Viral Diseases

Serum samples were collected from poultry bred in integrated, independent and backyard production system, in Feira de Santana – Bahia, for evaluation of antibodies against Newcastle Disease virus. Samples were obtained from day-old chicks, slaughter poultry and backyard chickens ranging from four months to three years of age. Serum was analyzed by a commercial indirect ELISA. Results demonstrated that one day old chicks presented high antibodies titers with coefficient of variation of 33.03%, because their mothers were vaccinated. Poultry from integrated and independent producers presented higher variation coefficient, 99.07% and 97.01%, respectively, demonstrating no uniformity in titers, due to the lack of a good vaccinal response against Newcastle disease virus. The occurrence of high antibody titers was observed in backyard chickens, and coefficient of variation of 146.41%, demonstrating the lack of vaccinal response. This data suggest that the studied commercial poultry is not well immunised by vaccination. Moreover, the presence of backyard chickens with evidence of high antibodies titers, suggests that they can become a threat to industrial poultry.