Immunity in the invertebrates. II. Adaptive immunity in the crayfish (Parachaeraps bicarinatus).

Studies have been made on the resistance of the crayfish (Parachaeraps bicarinatus) to a bacterial pathogen following immunization. The development of immunity is dependent on the dose of vaccine given, and the temperature at which the animals are maintained. The implications of these findings in relationship to the immune response in vertebrates is discussed.