Effects of Dietary Supplementation of Vitamin E on Growth Performance and Immune System of Broiler Chickens

As a potent antioxidant, Vitamin E may lessen the potentially harmful consequences of such oxidative stress to protect broilers against immune-pathological damage. Broiler chicken growth and viability are enhanced by supplementation. The present study aimed investigate effects dietary supplementation on broiler chickens’ performance health status. A total 48 one-day-old Ross chicks were randomly divided into two groups control treatment (supplementation at dose 300 mg/kg diet) with three replicates per group. included an equal number breed dosage in trials different dates (January March, 2022). In both trials, obtained results indicated no significant changes weight gain groups. there differences spleen treated groups; however, from day 1 28 second trial, bursa Fabricius was heavier group than Additionally, had mitogenic responses phytohemagglutinin (PHA) Concanavalin (Con A). Dosages 20 10 µl for PHA Con did not significantly affect rate pure lymphocyte proliferation fed mg /kg feed. Cell-mediated immunity differ between trials. percentages CD4, CD8, Bu1, MHCII molecules cecal tonsil that received feed change significantly. antibody titers infectious bronchitis bursal disease vaccines showed differences. On 42, trend toward increase titer case Newcastle vaccine. conclusion, added diet improve chicks. Keywords: chicken, Growth performance, Immune system,