strains of baberia have ben isolatal from the intestines and intestinal food samples ofhealthy silver carp, common cam,grass carp an Wuchang fish.Among these strains of Aeromonas hydrophila have been identifided by using dextrin一fuchsin medium, oxidase and amylase detecting.Futhermore, the distrbution of proteinase ,CMCase,FP’ase and hemolysin in A. Hydrophila strains has also been investigated in this paper.The intestinal A.hydrophila proteinase and CMCase, but do not produce FP’ase and hemolysin. This res...