Efeitos da fumonisina B1 em codornas poedeiras (Coturnix coturnix japonica) / Fumonisin B1 effects on laying japanese quail (Coturnix coturnix japonica)

AUTOR(ES)
DATA DE PUBLICAÇÃO

2003

RESUMO

A 28-d experiment was conducted to evaluate the effect of fumonisin B1 (FB1) on egg production and egg quality of young laying Japanese quail fed contaminated rations. To this end, 128 7-wk-old birds were randomly distributed into four experimental groups (32 birds per group) and given rations containing 0 (controls), 10, 50 and 250 mg FB1/ kg feed. Each treatment consisted of four replicates of eight quail. Egg production and egg weights were checked daily. Feed consumption and feed use were determinated weekly. Eggs laid in the last day of each 7-d period were collected and subjected to individual analysis for specific gravity, Haugh units and percentage eggshells. On day 28, 12 quail from each treatment (4 replicates of 3 birds each) were bled by cardiac puncture and samples used for serum chemistry analyses (total protein, albumin, AST, GGT, and uric acid). Sixteen quail from each treatment were sacrificed by cervical dislocation, and liver, kidney, and heart were removed, weighed and collected for histopathological examination. Compared with controls, quail fed >= 50 mg FB1/ kg had reduced (p <0.05) feed intake and lower (p <0.05) body weight gain. However, feed use was only reduced (p <0.05) for birds fed 250 mg FB1/ kg. Average egg production was significantly lower (p <0.05) for group exposed to 250 mg FB1/ kg. Egg weight was significantly decreased (p <0.05) for birds fed 250 mg FB1/ kg. Average specific gravity and Haugh units were not affected (p >0.05) by FB1. Eggshell weight was reduced (p <0.05) for birds fed >= 50 mg FB1/ kg. However, percentage eggshell was not affected by FB1. Compared with controls, quail fed >= 50 mg FB1/ kg had increased (p <0.05) relative liver weight. Relative kidney weight and relative heart weight were not affected (p >0.05) by FB1. Compared with controls, birds fed 250 mg FB1/ kg diet had reduced (p <0.05) hematocrits. FB1 had no effet on hematological values evaluated (p >0.05) but on hematocrits. Despite the icreased (p <0.05) on total white blood cell count for quail fed 10 mg FB1/ kg diet, FB1 had no effect on heterophil, lymphocyte and monocyte counts (p >0.05). Compared with controls, AST concentrations were higher (p <0.05) in quail fed 250 mg FB1/ kg diet. It was not observed any histopathological change in liver, kidney and heart samples from any treatment group, compared with controls. These results suggest that quail are sensitive to the toxic effects of FB1 at levels that have been reported to occur in feedstuff under field conditions. Data indicated that exposure to FB1 at levels >= 50 mg/ kg could adversely affect quail performance, emphasizing the importance of controlling fumonisin contamination in quail rations.

ASSUNTO(S)

toxicidade em animal toxicity quail ovos (qualidade) quality fumonisin b1 fumonisina eggs codornas

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