Assessment of beer yeast diet and organic minerals on the performance and immune reponse of broilers immunized against coccidiosis vaccine/Suplementacao dietetica de levedura de cerveja e de minerais organicos sobre o desempenho e resposta imune em frangos de corte desafiados com a vacina de coccidiose
The objective of this study was to evaluate the effects of beer yeast and organic minerals supplementations on the performance, intestinal morphometry and humoral immune response of broilers that were challenged with coccidiosis vaccine. Three-hundred-eighty-four chicks were used, randomly distribut...
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Veröffentlicht in: | Ciência rural 2013-08, Vol.43 (8), p.1496 |
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Zusammenfassung: | The objective of this study was to evaluate the effects of beer yeast and organic minerals supplementations on the performance, intestinal morphometry and humoral immune response of broilers that were challenged with coccidiosis vaccine. Three-hundred-eighty-four chicks were used, randomly distributed in an entirely random design total with four treatments (1. control, 2. organic minerals on top, 3. beer yeast, 4. association between organic minerals and beer yeast) and four treatments with 24bird repetition each. At housing, 12 birds of each repetition were identified and received the eye-drop vaccine against coccidiosis. At 7, 21, 35 and 42 days it was collected blood to analyze the total serum proteins and the eletrophoretic profile of IgA and IgG and a duodenal segment for morphometric analysis. Neither the beer yeast nor the organic minerals supplementation affected the broiler performance or the antibodies production. The immunological challenge like the coccidiosis vaccine was not efficacious enough to provide an immune response able to modify the duodenal mucosa morphometry and the antibodies production. Key words: microelements minerals, immune system, vitamin B complex, intestinal morphometry, coccidiosis. O objetivo desta pesquisa foi avaliar o efeito da suplementacao de levedura de cerveja e minerais organicos sobre o desempenho, morfometria intestinal e resposta imune humoral de frangos de corte, desafiados com a vacina de coccidiose. Foram utilizados 384 pintos de corte, distribuidos aleatoriamente em um delineamento inteiramente casualizado com quatro tratamentos (1. controle, 2. minerais organicos 3. levedo de cerveja, 4. associacao de minerais organicos e levedo de cerveja) e 4 repeticoes de 24 aves cada. No alojamento, 12 aves de cada repeticao foram identificadas com anilha e receberam a vacina contra coccidiose via ocular. Aos 7, 21, 35 e 42 dias, foi coletado sangue para analise de proteinas sericas totais e perfil eletroforetico de IgA e IgG e um segmento do duodeno para analise morfometrica. A suplementacao de levedo de cerveja ou de minerais organicos nao afetou o desempenho de frangos de corte ou a producao de anticorpos. O desafio imunologico com a vacina de coccidiose nao foi suficientemente eficaz em provocar uma resposta imune capaz de alterar a morfometria da mucosa duodenal e a producao de anticorpos. Palavras-chave: microelementos minerais, sistema imune, vitaminas do complexo B, morfometria intestinal, coccidiose. |
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ISSN: | 0103-8478 |