Immunological Response and Nutritional Effects of spp.-fermented Garlic on Turkey Broilers.

In the era of free antibiotics used in animal production, the application of feed additives should be prioritized to improve poultry health and production.  The present study was conducted to evaluate the influences of garlic fermented by  spp. on the growth rate, intestinal microorganisms, and immune response of turkey broilers. A completely randomized design was used, involving 90 turkey broilers aged 1-56 days, with five treatments and three replicates per treatment. The birds were given feed and water  for the entire experiment period. The treatments included the supplementation of aqueous extract from fermented garlic (FG) to drinking water. The results showed that broilers supplemented with 0.8% FG exhibited the largest final body weight (1,158 g/bird), body weight gain (19.64 g/bird/day), and significantly improved feed conversion ratio (1.962) while decreasing the feed intake of turkey broilers from to 1-56 days. The immune organ indices, including the spleen, thymus, and bursa of Fabricius indices, were increased in the 0.6% FG treatment group (<0.05), while antibody titers (at 28 and 42 days of age) were improved in the 0.6% and 0.8% FG treatments (<0.05).  and  spp. were not detected in the intestines of these birds, while the amount of  was reduced (<0.05) and  spp. increased (>0.05) without a significant effect. It can be concluded that supplementation with 0.8% FG improved growth performance, and 0.6% FG may enhance the immunity of turkeys. Moreover, 0.6% and 0.8% FG could be widely used for poultry production.