Immunity in the Invertebrates. Correlation of the Phagocytic Activity of Haemocytes With Resistance to Infection in the Crayfish (Parachaeraps Bicarinatus)

Summary Data presented indicate that the most important change in the adaptive immune response of the crayfish (Parachaeraps bicarinatus) to infection following immunisation resides in a change in the activity of phagocytic cells. However, the activity of the cells as measured by the phagocytosis of erythrocytes can lie demonstrated only if the erythrocytes are first treated with haemolymph.