The activities and location of acid phosphatase(ACP) and alkaline phosphatase(AKP) in the liver(L),muscle(M),heart(H) and eye(E) of Litopenaeus vannamei were studied with enzyme cytochemical technique of electronic microscope,compared it with the infected shrimp.The results showed that ACP positive reactions were mainly deposited in lysosome,nucellar cell,cellular endomembrane,mitochondrium,and endoplasmic reticulum in four tissues of the healthy shrimp.Furthermore,ACP activity was located in microvilli and...