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Effects of methionine and arginine dietary levels on the immunity of broiler chickens submitted to immunological stimuli

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Effects of methionine and arginine dietary levels on the immunity of broiler chickens submitted to immunological stimuli

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Título Effects of methionine and arginine dietary levels on the immunity of broiler chickens submitted to immunological stimuli
Autor Rubin, Lauricio Librelotto
Canal, Cláudio Wageck
Ribeiro, Andrea Machado Leal
Kessler, Alexandre de Mello
Silva, Isabel Cristina Mello da
Trevizan, Luciano
Viola, Teresa Herr
Raber, Marcos Roberto
Gonçalves, Thomas Aguiar
Kras, Rodrigo Vieira
Abstract The present study aimed at assessing the effects of methionine and arginine on the immune response of broiler chickens submitted to immunological stimuli. Three methionine concentrations (0.31, 0.51, and 0.66% from 1 to 21 days of age; 0.29, 0.49, and 0.64% from 22 to 42 days of age) and 2 arginine concentrations (1.33 and 1.83%; 1.14 and 1.64% for the same life periods) were tested. Birds were divided into two groups for immunological stimuli (3x2x2 arrangement). Vaccines against Marek’s disease, fowl pox, infectious bronchitis, Freund’s Complete Adjuvant, Sheep red blood cells (SRBC), and avian tuberculin were administered to one group as immunological stimuli; the other group did not receive any stimulus. The experiment was carried out with 432 one-day-old male Ross broilers, distributed into 12 treatments with 6 replicates of 6 birds each. Performance data were weekly collected Anti-SRBC antibodies were collected by hemagglutination test and cell immune response (CIR) was measured by tubercularization reaction in one wattle 24 hours after administration of the second tuberculin injection at 42 days of age. The weight difference between the two wattles of each bird (one injected with tuberculin and the other not) was the measure of CIR. Arginine levels did not influence either bird performance or immune response. Methionine concentrations higher or lower than usually adopted in broiler production (0.51 and 0.49%) equally failed to influence the birds’ immune humoral response, but the best CIR was observed at the intermediate methionine level. Vaccines administered on the first day of age impaired bird performance up to the 21 st day of age.
Contido em Revista brasileira de ciência avícola= Brazilian journal of poultry science, Campinas. Vol. 9, n. 4 (out./dez. 2007), p. 241-247
Assunto Frango
Origem Nacional
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/20570
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