When the pathogenic bacteria isolated from the liver, spleen and kidney tissues of 22 moribund death or distinctly diseased fishes which were artificially infected with the strain CSS-4-2 were detected, the positive rate of slide agglutination method for isolate bacteria was 100%. 玻片凝集法对22尾人工感染CSS42菌株临死的或有明显症状的丰产鲫的肝、脾、肾组织分离菌的阳性检出率为100%;