Effect of Environmental Temperature on Immune Response of Broilers

• Autor(a) principal: Santin, E. [UNESP]
• Data de Publicação: 2003
• Outros Autores: Maiorka, A. [UNESP], Polveiro, W. J.C. [UNESP], Paulillo, A. C. [UNESP], Laurentiz, A. C. [UNESP], Borges, S. A. [UNESP], Fischer Da Silva, A. V. [UNESP]
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1093/japr/12.3.247; http://hdl.handle.net/11449/224379
• topic: Broiler; Humoral immunity; Temperature

Several studies demonstrate that environmental temperature can influence the immune response of poultry. The objective of this research was to determine at which stage in the life of a bird this effect is greatest. In experiment 1, broiler breeder eggs were incubated at three different temperatures (36.8 ± 0.2, 37.8 ± 0.2, and 38.8 ± 0.2°C) from the 13th day of incubation to hatching. After hatching, birds were raised in thermoneutral temperature. In experiment 2, 144 1-d-old broiler chicks were distributed into three environmental chambers with different temperatures (18 ± 2, 24 ± 2, and 32 ± 2°C). In both experiments, the humoral immune responses to Newcastle disease virus (NDV) and infectious bursal disease (IBDV) were evaluated. NDV and IBDV antibody titers were not significantly different (P > 0.05) among treatments.