FURTHER STUDIES WITH TOXIC SERUM EXTRACTS OF HEMOLYTIC STREPTOCOCCI

摘要: 1. The same Streptococcus hemolyticus organisms may be subjected to extraction six times in 2 days with untreated inactivated serum no loss potency of the later extracts when are kept frozen solid during night between extractions. 2. extract toxins hemolytic streptococci can preserved without deterioration for at least 6 months if solid. 3. No stronger than those containing 10 units per cc. mice have been prepared. Reasons thinking that this is due saturation toxin point given. 4. Half (NH(4))(2)SO(4) precipitates out practically all hemotoxin a preparation. 5. Serum were made from strains other Gay strain and attempts correlate virulence production each strain. such correlation could established. 6. principal pathologic finding inoculated streptococcus marked degeneration tubular epithelium kidney.