Rabbit pasteurellosis aluminium hydroxide gel adjuvanted vaccine (ALV) and aqueous formalized one (AV) were evaluated serologically and by 2-stage protection bioassay. Evaluation in mice revealed a good pro­tection level (85%) in either ALV or AV vaccinates, when subjected to homogenous challenge exposure. In rabbits, both vaccines stimulated satisfactory and significantly differed antibody levels. However, level re­corded in ALV vaccinates persisted for more prolonged period (16^th week post-boostering, PB) than in case of AV. Moreover, sera from rab­bits immunized with ALV or AV form passively protected mice at a levels of 70% and 60%, respectively. The l^et-stage bioassay conducted at rⁱ weeks PB revealed no difference in the level of protective immunity (80%) between rabbits vaccinated with either forms of vaccines. However, the 2^m-stage bioas­say conducted at 16^th week PB revealed a superior protective level (70%) in ALV vaccinates versus 50% only in AV ones. The ALV-based Pasteur°Ua vaccine proved to be safe and effec­tive alternative to the classical aqueous one for controlling P. multocida infection in rabbits.