STUDY ON PATHOGENICITY OF VIBRIO ISOLATED FROM MARINE FISH TO PENAEUS MONODON AND EFFECT OF VIBRIO VACCINE

The pathogenicity of five Vibrio bacteria isolated from marine fishes, Vibrio alginolyticus, V. vulnificus, V. fluvialis Ⅰ, V. anguillarum, V. parahaemolyticus, to shrimps and the immunological prevention of Vibriovaccine are studied. The results show that these bacteria have apparently different pathogenicity to Penaeus monodon through intramuscular infection. The strongest pathogenic bacterium is screened out. The vaccine made of V. alginolyticus killed by formalin can improve the immune prevention and resistance to Vibrio bacteria of Penaeus monodon. To a certain extent, the resistance to inoculated Vibrio improves with the increasing of vaccine concentration. It shows that vaccines have the same protection to vibriosis both in fishes and in shrimps, and vaccines for fish and shrimps may be produced together.