[The comparative characteristics of Vibrio cholerae hemolysins].

Biochemical and biological properties of in vivo and in vitro hemolysins of cholera germs isolated by different authors as well as hemolysins of Vibrio parahaemolyticus and Escherichia coli have been comparatively characterized. According to the above data hemolysin of cholera germ El Tor is a thermolabile protein with molecular mass of 60-80 thou.; it is cytotoxic, enteropathogenic and lyses all the species of erythrocytes. Hemolysins of V. eltor and germs are immunologically related. Hemolysin of the cholera germ is thermostable and has molecular mass of 20-40 thou., that makes it similar to hemolysin of V. parahaemolyticus.