THE INFLUENCE OF THE ?-CAROTENE CONTAINING PREPARATIONS VITATON, VITADEPS, PROVITAMIN A ON THE POULTRY IMMUNITY LEVEL The Sumy National Agrarian University Conclusions 1. It has been determined, that the feed supplements based on beta-carotene (Vitaton, Vitadeps and Provitamin A) render positive effects on the poultry immunity system, increasing the immunity level after vaccination 1.6 -1.7-fold. 2. It has been noted, that the preparations based on beta-carotene authentically increase the natural resistance of the poultry organisms, the bactericidal and complementary activity of the blood serum, and also the lysozymic-cationic test. Recommendations for use Taking into consideration the carried-out research we can conclude, that the preparations under study (Vitaton, Vitadeps and Provitamin A) render positive effects on the poultry immunity system. The beta-carotene based preparations are recommended for use for the laying stock chickens starting from a day age, to increase both the poultry productive properties and the protective mechanisms of their organisms. With the aim to decrease the stress-inducing events and to increase the immunity level it is recommended to use the preparations during the poultry vaccination against the Gumboro disease, infectious bronchitis and the Newcastle disease. The recommended doses of introduction are as follows:   — Vitaton – 0.5 - 1 kg per ton of mixed feed   — Vitadeps -1- 5 kg per ton of mixed feed   — Provitamin A - 15 kg per ton of mixed feed.