Hematology and serum biochemistry of broilers at the initial and growth stages submitted to different levels of digestible sulfur amino acids/Hematologia e bioquimica serica de frangos de corte submetidos a diferentes niveis de aminoacidos sulfurados digestiveis

The objective of this study was to evaluate the effect of digestible methionine and cystine (Met + Cys) levels on the hematological and serum biochemical parameters of broiler chickens during the initial and growth stages. For this, 1,800 male chicks of the Coob 500 strain were used, with 900 chicks...

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Published in:Ciência rural Vol. 50; no. 5
Main Authors: de Carvalho, Genilson Bezerra, Ma, Rezende, Pedro Moraes, Santos, Januaria Silva, de Oliveira, Evelyn, de Campos Trentin, Thays, Stringhini, Jose Henrique, Cafe, Marcos Barcellos
Format: Journal Article
Language:English
Published: Universidade Federal de Santa Maria 01-05-2020
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Summary:The objective of this study was to evaluate the effect of digestible methionine and cystine (Met + Cys) levels on the hematological and serum biochemical parameters of broiler chickens during the initial and growth stages. For this, 1,800 male chicks of the Coob 500 strain were used, with 900 chicks in the initial phase (1 to 21 days old) and 900 chicks in the growth phase (22 to 42 days old), distributed in a completely randomized design of five treatments with six replicates of 30 birds. The treatments consisted of 0.545, 0.616, 0.711, 0.782, and 0.853%; and 0.514, 0.571, 0.647, 0.704, and 0.761% digestible Met + Cys for "1 to 21" and "22 to 42" days of breeding, respectively. Results showed that digestible Met + Cys levels in broiler feed altered some hematological parameters (erythrocyte, hematocrit hemoglobin, total leukocytes, heterophile: lymphocyte) and serum biochemistry (uric acid, PST, total LDL, and TG). The digestible Met + Cys levels in the diet of broilers affected the hematological parameters and serum biochemistry, especially at higher levels. From the inclusion level 0.761 of Met + Cist in the broiler diet, red blood cells, hemoglobin and hematocrit changes begin to appear. Key words: amino acid metabolism, cysteine, methionine, immune system, poultry. Teve-se como objetivos neste estudo avaliar o efeito dos niveis de metionina + cistina (Met+Cis) digestivel na dieta sobre os parametros hematologicos e bioquimicos sericos de frangos de corte na fase inicial e de crescimento. Para isso, utilizou-se 1.800 pintos, machos, da linhagem Coob 500, sendo 900 pintos para a fase inicial (1 a 21 dias de idade) e mais 900 pintos para a fase de crescimento (22 a 42 dias de idade), distribuidos em delineamento inteiramente casualizado composto de cinco tratamentos, com seis repeticoes de 30 aves. Os tratamentos consistiram em 0,545; 0,616; 0,711; 0,782 e 0,853% e 0,514; 0,571; 0,647; 0,704 e 0,761% de Met+Cis digestiveis para a fase inicial e de crescimento, respectivamente. Os resultados demonstraram que niveis de Met+Cis digestivel na alimentacao de frango de corte, acarretam alteracoes em parametros hematologicos como: hemacia, hematocrito, hemoglobina, leucocitos totais, relacao heterofilo: linfocito; e bioquimico serico como: acido urico, albumina, colesterol total, proteinas sericas totais (PST), lipoproteina de baixa densidade (LDL) e triglicerideos (TG). Os niveis digestiveis de Met + Cys na dieta de frangos de corte afetam os parametros hematologicos e a bioquimica serica, principalmente em niveis mais elevados. A partir do nivel de inclusao 0.761 de Met + Cist na dieta de frangos de corte, comecam a aparecer alteracoes nos globulos vermelhos, hemoglobina e hematocrito. Palavras-chave: aves, cistina, metionina, metabolismo aminoacidico, sistema imune.
ISSN:0103-8478
DOI:10.1590/0103-8478cr20180881