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Background The objective of this study is to examine the toxic effects of zinc on the liver of broiler chicks. For this purpose, twenty broiler chicks were taken for the experiment and their weight ranging from 35-45 g. They were divided into four groups: one control and three treated groups. All treated groups were supplemented with 300 mg/kgb.w (low dose, LD), 600 mg/kgb.w (intermediate dose, ID) and 900 mg/kgb.w. (high dose, HD) of Zinc and the control group was fed basal commercial starter diet for 21 days. Results Necrosis, liver cell hypertrophy, fuzzy liver cells and lymphocytic inflammation were found in birds exposed to the low and intermediate dose as compared to the controlled group. Broiler chicks exposed to high dose showed pronounced changes in the liver such as congestion of blood vessels, connective tissue hyperplasia, bile duct proliferation, dilation of sinusoids, damaged intercellular contacts between hepatocytes, liver cell hypertrophy and accumulation of inflammatory cells Conclusion After the careful analysis of the study, the results have been reported that if one can take zinc in higher amount as supplements or in their foods than it affects the normal structure of the liver and it will alter the functioning of the liver in both human and animals.

Toxicological effect of zinc on liver of broiler chicks