通过对3000多公顷虾池检测496份病虾及水体,均证明致使对虾发生弧菌病、气单胞菌病时的临界菌量值为10~(4.5)～10~5个/ml,当虾池中弧菌数达到10~(4.5)个/ml时,对虾就可能发病,此时就需用药物预防或换水,并证明弧菌菌量与水温、饵料、对虾密度的关系为正相关. Through the detection of 496 diseased shrimp and water in more than 3000 hectares of shrimp ponds, it was proved that the critical bacteria amount of aeromonas was 10 ~ (4.5) ~ 10 ~ 5 / ml when Shrimp ponds in the number of Vibrio reached 10 ~ (4.5) / ml, the shrimp may be the disease, then need to use drugs to prevent or change the water and prove that the amount of Vibrio bacteria and water temperature, food, shrimp density is positive Related.