Nutritional modulation of immune function in broilers

“…According to Kidd (2004), beneficial effects were observed when Arg was supplemented at levels 25 and 50% higher than the established nutritional requirements. Levels close to those recommended did not improve humoral or cell-mediated immune response, despite raising Arg blood levels (Kidd, 2004).…”

Section: Resultsmentioning

confidence: 99%

The effect of arginine dietary supplementation in broiler breeder hens on offspring humoral and cell-mediated immune responses

Murakami

Silva

Fernandes

et al. 2014

Rev. Bras. Cienc. Avic.

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“…Também não houve nenhum tipo de estresse provocado aos frangos. Na resposta imunológica, o Se é componente essencial da enzima GSH-Px, que tem como função principal detoxificar os radicais livres como os peróxidos produzidos no metabolismo normal das células, sejam no citosol ou nas membranas, em associação com a vitamina E, e com isso tem impacto na resistência a doenças (KIDD, 2004).…”

Section: ---------------------------Se Analisado (Mg Kg -1 ) --------unclassified

Diferentes fontes e níveis de selênio sobre a imunidade humoral de frangos de corte

et al. 2011

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O presente trabalho teve o objetivo de investigar os efeitos da variação de níveis e fontes de selênio (Se) sobre a imunidade humoral de frangos de corte. Foram utilizados 1440 pintos de um dia, machos, criados até os 42 dias. O delineamento experimental foi inteiramente casualizado com seis dietas experimentais (A: 0,15mg kg-1 Se inorgânico (inorg.); B: 0,15mg kg-1 Se orgânico; C: 0,15mg kg-1 Se inorg.+orgânico; D: 0,45mg kg-1 Se inorgânico; E: 0,45mg kg-1 Se orgânico; F: 0,45mg kg-1 Se inorg.+orgânico) calculadas para fornecerem a quantidade de Se descritas, e seis repetições com 40 aves cada. Foi utilizado um arranjo fatorial 3x2 e os dados foram submetidos à análise de variância, com nível de significância a 5%. A imunidade foi avaliada por meio da resposta à vacina contra a Doença de Newcastle e resposta à sensibilização prévia com eritrócitos de carneiro (SRBC). Não foi observada diferença estatística ao nível de significância de 5%, para os títulos de anticorpos contra a vacina da Doença de Newcastle (P>0,05). Entretanto aos 14 dias o fator fonte obteve probabilidade (P=0,0580), resultado que mostra uma tendência de influência da fonte inorgânica na manutenção da imunidade materna, pois nesta idade as aves ainda não haviam sido vacinadas contra a Doença de Newcastle. Não foi observado nenhum efeito para variável de resposta a sensibilização prévia com SRBC (P>0,05). Os resultados mostram que as aves responderam imunologicamente ao estímulo, porém a variação da fonte e do nível de Se não foi capaz de induzir uma diferença significativa na resposta imunológica das aves. Os níveis e fontes de Se não têm efeito sobre a resposta imunológica aos eritrócitos de carneiro (SRBC) e, resposta imunológica a vacina contra a Doença de Newcastle.

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“…Furthermore, even if a wide range of ingredients were available, the preparation of adequate diets is difficult to achieve in commercial systems because of the limited storage available to feed compounders. Birds fed conventional diets that provide methionine at suboptimal levels have been shown to be predisposed to health-, welfare-and productionrelated problems (Friedman et al, 2003;Kidd, 2004;Klasing, 2006). Furthermore, birds cannot necessarily compensate for inadequate amino acid levels by increased food intake (Whitehead, 2002).…”

Section: Introductionmentioning

confidence: 99%

“…The poorer nutrient balance associated with methioninedeficient diets affects growth (Sklan and Noy, 2003) and the efficiency of the immune system, the latter being of particular significance for birds on organic systems that have access to range and are challenged repeatedly with pathogens (Pennycott and Steel, 2001;Kidd, 2004). Apart from the nutritional impact on birds, it has been proposed that diets deficient in the essential nutrients may lead to behaviours such as feather pecking and cannibalism, which have a detrimental affect on bird welfare (Wahlströ m et al,…”

Section: Introductionmentioning

confidence: 99%

The effect of organic diets on the performance of pullets maintained under semi-organic conditions

Acamovic

Sandilands

Kyriazakis

et al. 2008

Animal

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The effects of organic diets, with or without supplements of betaine, saponin, fructo-oligosaccharide and methionine, on the health, performance and gut flora of pullets were investigated. A comparison was also made between birds fed organic diets and those fed a non-organic diet. Day-old Lohmann Tradition pullets were reared in 24 groups of 64 chicks indoors until 11 weeks, and then in 48 groups of 24 to 27 chicks with access to range until 17 weeks of age. Groups of birds were fed one of eight diets, a conventional rearing diet with supplementary amino acids, an organic basal diet, organic basal plus methionine and organic basal supplemented with one of the test ingredients. At most stages of growth the birds fed the conventional diet and those fed the basal diet with methionine performed better than those that had no supplemental methionine. Other dietary treatments had no consistently significant effect on growth, the microbial populations within the gastro-intestinal tract of the birds or the number of parasite eggs excreted. After 5 weeks with access to range, the birds that were fed three out of five diets regarded as deficient in sulphur amino acids achieved similar weights (P . 0.05) to birds that received diets adequate in sulphur amino acids. Health and welfare of birds fed organic diets was not adversely affected; however, an investigation of birds housed in larger flocks and taken into the laying phase, when physical demands on birds are greatest, is required.

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Nutritional modulation of immune function in broilers

Cited by 216 publications

References 74 publications

The effect of arginine dietary supplementation in broiler breeder hens on offspring humoral and cell-mediated immune responses

The effect of arginine dietary supplementation in broiler breeder hens on offspring humoral and cell-mediated immune responses

Diferentes fontes e níveis de selênio sobre a imunidade humoral de frangos de corte

The effect of organic diets on the performance of pullets maintained under semi-organic conditions

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