Abstract
S-type of Z 27, Z 29 and R-type of Z 29 designated by this author were isolated from the strains of Lactobacillus acidophilus and their immunological characters were investigated by precipitation reaction both with so-called carbohydrate-antigen of Lancefield and with ordinary agglutination reaction.
As the result of these experiments, following points were clarified :
1. In precipitation reaction, no particular difference was observed whether the serum and the antigen are in homologous relation or in heterologous one.
Howerer very slight lowering of the titre was observed in the reaction between S-type antigen and R-type serum or between R-type antigen and S-type serum.
2. In agglutination reaction, no particular difference was observed in the titre among different strains of the species and between S-type antigen and R-type serum or R-type antigen and Stype serum.
