Hemocyte lysate enhancement of fungal spore encapsulation by crayfish hemocytes

Crayfish hemocytes exhibited a stronger encapsulation reaction to fungal blastospores of Beauveria bassiana coated with hemocyte lysate, than to blastospores treated with plasma or buffer, indicating an opsonic function of hemocyte lysate proteins. Five proteins of the prophenoloxidase activating system in the hemocytes were attached to foreign surfaces (including the blastospores) after activation and it is suggested that these attaching proteins (one being phenoloxidase) are responsible for the opsonic function of the hemocyte lysate on crayfish blood cells.