EN
The aim of the study was to evaluate the influence of monovalent A.hydrophila and A. sobria vaccine on the induction of the protective immunity against the heterologous strains of Aeromonas genus in carp (C. carpio L.). Additionally, the level of immunity in carp after single and double vaccinations was compared. Separate groups of carp were immunised with 1S-95 (A.hydrophila) or 4R-96 (A.sobria) antigens by intrapesi to neal injection or by immersion. The immunisation efficiency was evaluated using challenge tests with various heterologous strains of Aeromonas genus. Carp revealed a partial immunity against the heterologous strains irrespective of the antigen kind and the route of vaccine administration. Fish immunised by immersion demonstrated a particularly high level of immunity. Antigen 1S-95 (A.hydrophila) protected more efficiently against another heterogenous strain of A.hydrophila than against A.sobria strain and vice versa. Double immunisation failed to increase the protective immunity as compared to that produced by a single immunisation.