EN
Stimulatory properties of Propionibacterium avidum were estimated on the basis of humoral immunity firmation in pigs and protective value of combined vaccination with Suivac A and PA KP-40 (experiment a). In this experiment 22 piglets were treated with Suivac A and/or PA KP-40. 8 weeks after vaccination pigletswere chalenged with virulent NIA 3 strain of pseudorabies virus. The analysis of body weight gains and persistence of increased internal temperature revealed, that nonspecific immune stimulation together with specific vaccine gives better protection of animals than vaccination with Suivac A only, influence of immunostimulation with PA KP-40 preparation on piglets challenged with hog cholera (HC) virus was investigated in experiment (b). 30 piglets were inoculated with lapinized vaccine Lapest and/or PA KP-40 and then challenged with virulent HC strain. Treatment of piglets with PA KP-40 resulted in twofold prolonged period of surviral, comparing to untreated, infected controls.