Production, Purification And Characterization Of The Hemolysin Of Streptococcus Suis Type 2 Of Jiangsu Strain

Heinolysin detection of Streptococcus isolates of Pigs Swine Streptococcus strains isolated from Jiangsu and Shanghai in recent years were detected for the hemolysin. Eight iiangsu isolates of Streptococcus suis type 2 showed poor bemolysin on the blood agar. but very strong hemolysin in the Todd-Hewitt broth(THB), and its hemolysin belong to the family of thiol-activated hemolysin. Nine isolates of Streptoccus equi subsp. zooepidemicus showed very strong hemolysin on the blood agar and in THB adding 5% new-born calf serum, but no hemolysin in TI-lB. and the hemolysin was similar to Streptolysin S(SLS). Another two isolates being non typical group C showed very strong hemolysin on the blood ag~r and in THB adding 5% new-born calf serum, but its hemolysin was neither SLO-lik nor SLS-Iike hemolysin.