Agglutinin activity in hemolymph of Chinese shrimp and induction effect of Vibrio

Experiments showed the agglutinin activity in the hemolymph of both spring wild parents and autumncultured individuals of the shrimp Penaeus chinensis Osbeck with the body length of 12 - 16 cm as all 32. Thehemolymph of the above shrimps showed agglutinant reaction to all A-, B- and O-type human erythrocytes, with thereaction titer equal to that of rabbit blood cells. However, the agglutinin activity level was enhanced after being in-duced by Vibro, which was 128 after 24 h of induction and reached the peak value 256 after 48 h of induction, thendecreased gradually.