The acid phosphatase (ACP) in the blood cells of oncomelania hupensis was observed at the light microscope level by the burstone stained technique.

结钉螺血淋巴细胞中伸展阿巴细胞胞浆中可见呈棕色颗粒ACP反应物,而圆形阿巴细胞胞浆中未见呈棕色颗粒ACP反应物。