On the group specificness of antibodies in antistreptococcus serum

In previous articles 11 have shown that sheep immunized with hemolytic streptococci from scarlet fever and erysipelas, respectively, produced specific opsonins and agglutinins. The results of absorption tests also indicated that the streptococci from these diseases belonged to distinct biologic groups. Protection experiments with the streptococci from scarlet fever gave additional weight to this inference in respect to the scarlatinal group. Bliss 2 and Gordon 3 reached similar conclusions concerning streptococci from scarlet fever, by means of agglutination tests with immune rabbit serum.