Data/hora: 06/06/2024 05:57:54

Provedor de dados: | 65
País: | Brazil
Título: | Feeding different levels of vitamin E and selenium has no effect on serum immunoglobulin Y (IgY) production by layers vaccinated against Escherichia coli and avian encephalomyelitis virus
Autores: | Kindlein,Giselle; Ribeiro,Andréa Machado Leal; Canal,Cláudio Wageck; Vieira,Maitê de Moraes.
Data: | 2007-10-01
Ano: | 2007
Palavras-chave: | Avian encephalomyelitis; Escherichia coli; Immunoglobulin; Selenium; Vitamin E.
Resumo: | The effects of vitamin E and selenium (Se) supplementation on the immunity of hens vaccinated against a mixture of six swine-pathogenic Escherichia coli (EC) and avian encephalomyelitis virus (AEV) were studied. Antibody production (AbP) was evaluated in ninety 49 to 57-week-old H&amp;N Nick Chick hens fed diets containing 14IU Vitamin E kg-1 (basal diet), 27, 59, 111, or 111IU vitamin E kg-1 + 0.56ppm Se supplementation. At 51 wks of age, half of the hens were vaccinated against EC, and all birds were vaccinated against AEV. At 53-weeks of age, the birds received a second dose of EC vaccine. Blood samples were collected weekly and serum was analyzed by ELISA for anti-EC IgY and was expressed as optical density (OD). Vaccinated hens had higher serum OD than the non-vaccinated hens (P&lt;FONT FACE=Symbol&gt;£&lt;/FONT&gt;0.05). Vaccinated hens fed 27 and 59IU of vitamin E/kg had a higher (P&lt;0.05) serum OD than hens fed 111IU + Se. Neither EC nor AEV seem to be appropriate models for the study of the influence of micronutrients on immune responsiveness of older hens.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782007000500024
Editor: | Universidade Federal de Santa Maria
Relação: | 10.1590/S0103-84782007000500024
Formato: | text/html
Fonte: | Ciência Rural  v.37 n.5 2007
Fonte: | info:eu-repo/semantics/openAccess