从患病罗非鱼的血液、肝脏、脾脏中分离到细菌,经理化鉴定,该菌为气单胞菌,动物回归试验阳性,认定该罗非鱼的肠炎病由气单胞菌引起。 Bacteria were isolated from the blood, liver and spleen of diseased tilapia, and were identified by the physicochemical method. The bacterium is Aeromonas and the animal regression test is positive. The enteritis disease of the tilapia is believed to be caused by Aeromonas spp.