The influence of phytobiotics on the livability and morphohistological state of the chicken spleen

The intensity of industrial poultry farming, its conditions of keeping and feeding, vaccination and veterinary treatments, sorting and transportation are stressful technological moments that can inhibit growth and development of birds, accompanied with a decrease in production economic indicators. In the practice of the poultry industry in recent years, phytobiotic additives have been widely used as antibacterial drugs. Phytobiotics, due to the effect of certain biologically active compounds contained in them, proved to be effective in maintaining the most stable and optimal state of the gastrointestinal tract, regulating metabolic processes in the body of poultry, and strengthening their immune status. The article presents the results of studying the effect of phytobiotics Activo (contains a mixture of essential oils from plant extracts of thyme, rosemary, oregano, chili pepper extract as active ingredients) and Activo Liquid (liquid emulsified feed additive containing cinnamon oil, oregano oil as active ingredients, citric acid) on the livability of the livestock and the morphological and histological state of the spleen of chickens. According to the results of the studies in young animals and chickens of the egg direction, it was found that the inclusion of the studied phytobiotic feed additives in the feed contributed to an increase in the livability of the livestock for the period from the 14th to the 42nd week by 1.27%. Based on morphological and histological studies of spleen sections, it can be stated that birds in the control group were characterized by suppression of humoral immunity and, as a possible consequence, an increased risk of reinfection. While in the hens of the experimental group, less pronounced pathological and involutive changes were recorded in the organ under study, indicating an increase and preservation of their functional activity. Based on the totality of the studies, a beneficial effect of the studied feed additives on the body of laying hens in a given period of the technological cycle was noted, which contributes to an increase in adaptive responses, including the maintenance of antioxidant systems of the body.