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Moraes,HLS; Salle,CTP; Nascimento,VP; Salle,FO; Rocha,ACGP; Souza,GF; Furian,TQ; Artencio,JO. |
Broiler chicks belonging to two poultry companies, A and B, with different breeders' vaccination programs were challenged with a very virulent strains of infectious bursal disease virus (vvIBDV), genotyped as G11. Birds were separated in four groups, two vaccinated at the first day of life and two unvaccinated. They were then challenged at the 1st, 4th, 7th, 10th, 13th, 16th, 19th and 22nd days. At every day of challenge, before and after the procedure, the following data were collected from each group: Bursa of Fabricius (BF) relative weight, BF diameter, BF for histologie examination, serum for measuring antibodies against IBDV through the ELISA and clinical evaluation of IBD. The results obtained have shown a non-significant drop in antibody level... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Infectious bursal disease; Very very virulent IBD virus; Vaccination; Maternal immunity. |
Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2005000100009 |
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Moraes,HLS; Salle,CTP; Padilha,AP; Nascimento,VP; Souza,GF; Pereira,RA; Artencio,JO; Salle,FO. |
Infectious Bursal Disease (IBD) is a chicken disease economically important for the poultry industry in function of the immune depression that it causes. Disease control is made with different vaccines and vaccination programs. In present work, the pathogenicity of 3 intermediate vaccines (I1, I2 and I3), 2 intermediate more pathogenic (IP1 and IP2) and 3 vaccines containing strong virus (F1, F2 and F3) was evaluated. Birds vaccinated with IP1, IP2, F1, F2 and F3 showed significantly lower bursa size in relation to control animals and animals vaccinated with I1, I2 and I3. On the other hand, vaccines I1 and I3 induced antibody titers higher than the control and lower than I2, IP1, IP2, F1, F2 and F3. Histological scores showed that vaccines I1, I2 and I3... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bursa of Fabricius; Infectious bursal disease; Pathogenicity; Vaccines. |
Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2004000400009 |
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Salle,CTP; Guahyba,AS; Wald,VB; Silva,AB; Salle,FO; Fallavena,LCB. |
Uma atividade com a magnitude da avicultura, que usa equipamentos de última geração e serviços atualizados, é levada, na maioria dos casos, a tomar decisões que envolvem todos aspectos de produção, apoiada em critérios subjetivos. O presente trabalho objetiva estudar a utilização das redes neurais artificiais para serem usadas na predição dos parâmetros de desempenho das aves em recria, pertencentes a uma integração avícola sul-brasileira. Foram utilizados os registros de 11 lotes de reprodutoras pesadas para a análise por redes neurais artificiais, no período compreendido entre 09/11/97 a 10/01/99. Os dados utilizados corresponderam a 273 linhas de registros semanais. Os modelos de redes neurais artificiais foram comparados e selecionados como melhores,... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Avicultura; Gerenciamento; Recria; Reprodutoras pesadas; Redes neurais artificiais; Inteligência artificial. |
Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2001000300008 |
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