الفهرس 
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Abstract
The aim of this study was to assess the biochemical effect of guava (Psidium guava L.) mango (Mangifera indica L.) and lemongrass (cymbopogon citratus) leaves supplementation comparing with vaccine in broilers. Ninety five (95) broiler chicks cobb 500 one day old were divided randomly into nineteen groups. Groups from one to ten were vaccinated, while groups from 11 – 19 were non vaccinated. All groups, except the first (control) were supplemented with leaves at ratios 5%, 10% and 15% from guava, mango and lemongrass. Biochemical parameters were determined (total protein, triglycerides, total cholesterol, GOT (AST), GPT (ALT), urea, creatinine, uric acid, calcium and phosphorus). Body weight gain was increased by mango leaves supplementation at 5%. Protein content was increased with guava and lemongrass supplementation at 5%. Triglycerides and cholesterol contents were decreased at 5% supplementation of mango leaves. GOT (AST) activity was decreased by guava leaves supplementation at 5% while urea content was decreased at 10%. Creatinine content was decreased at 10% supplementation of both guava and lemongrass. Uric acid content was generally decreased at all supplemented leaves especially with vaccination. Calcium and phosphorus were affected with leaves supplementation.