The Journal of Experimental Medicine, Vol 40, 575-581,
Copyright, 1924, by The Rockefeller Institute for Medical Research New York
PRECIPITATION AND COMPLEMENT FIXATION REACTIONS WITH RESIDUE ANTIGENS IN THE NON-HEMOLYTIC STREPTOCOCCUS GROUP
Charles H. Hitchcock M.D.1
1 From the Department of Internal Medicine of Washington University School of Medicine, St. Louis.
The applicability to the non-hemolytic streptococci of the technique used for the extraction of a soluble precipitating substance from the hemolytic streptococci is demonstrated.
With this substance as antigen, it is demonstrated by means of precipitation and complement fixation that the non-hemolytic streptococci form an antigenically distinct, but entirely heterogeneous group.
Such cross-reactions as do occur within this group are not useful in the systematic classification of these organisms.
Submitted on June 24, 1924