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Effect of ethanolic extract of cashew leaf (Anacardium occidentale L.) in the feed on the weight gain and immunity were investigated on Jawa Super Chicken. Ninety chicken were divided into 6 groups those were basal feed group and 5 different concentration of chasew leaf extract groups. Experiment was conducted for 16 days started by 2 days acclimatization after hatching. Body weight was measured every 3 days starting from 0th day. On 16th day, the chicken were sacrificed, spleen and bursa of Fabricius were collected to quantify some histological parameters such as white pulp and follicle area as well as follicle thickness of those organs. The data were analyzed by regression and one way ANOVA followed by Tuckey test. Histological analysis was performed using optilab and Image Raster software. The results showed that growth and development of immune system of chicken increased significantly as could be seen in body weight, organs weight and index, as well as histological parameters. The regression results showed that spleen and bursa of Fabricius weight influenced increasing of body weight by 64.2% and 38.4% respectively. It could be concluded that biosupplementation of cashew leaf extract in basal feed could increase growth and immunity of Jawa Super Chicken.

Biosupplementation of Ethanolic Extract of Cashew Leaf (Anacardium occidentale L.) to Improve Weight Gain and Immunity of Jawa Super Chicken