The use of phytobiotics based on essential oils to enhance the immune status of broiler chickens

Abstract

In the conditions of industrial poultry farming, the body of poultry is negatively affected by numerous stress factors, which leads to the development of immunodeficiency conditions, increases susceptibility to infectious diseases, reduces the safety and productivity of livestock. In this regard, the use of immunocorrecting drugs is very relevant for poultry farming. The aim of the study was to study the effectiveness of using a phytobiotic based on a complex of essential oils of cinnamon, cloves, rosemary, thyme and sesame seeds to enhance cellular and humoral immunity of poultry. The studies were carried out on broiler chickens of the «Smena 9» cross, of which control and experimental groups of 70 heads each were completed at the age of one day. The chickens of the experimental group received phytopreparation in a dose of 0,2 ml/l of water from the 1st to the 7th day of cultivation and 0,3 ml/l of water from the 8th to the 38th day. At the age of 9 days, poultry was vaccinated against the Newcastle disease virus. Based on the research results, it has been established that the use of a preparation based on essential oils increases the adaptive abilities of broiler chickens after vaccination, reduces the negative effects of stress factors (biological, technological) on the body, activates cellular and humoral immunity. The phytobiotic had a greater effect on cellular immunity, as evidenced by an increase in the content of lymphocytes by 1,8 times, Tlymphocytes – by 2,9 times, B-lymphocytes by – 1,7 times, cationic proteins – by 40,3- 85,6%, and the level of spontaneous and stimulated HCT activity of neutrophils by 37,3-49,0%. The use of the drug contributed to an increase in the average titer of postvaccination antibodies to the Newcastle disease virus by 0,5-0,8 log₂.