抄録
When the 0 antigen titers and 0 antibody titers were measured by the precipitin reactions between 0 sera (0-1-0-5) and 0 antigens (0-1-0-5) of the Klebsiella group, antigen titers were found to be very low, being quite different from K antigens. Only 8 type antigens and 1 type antigen reacted with 0-1 serum and 0-3 serum, respectively, and other type antigens did not react with the 0 sera tested. 0 antignes, however, reacted with type sera. When K and 0 antibody titers of type sera and K and 0 antigen titers of type antigens were measured with K and 0 sera and type and 0 antigens, K antibody titers were much higher than 0 antibody titers, and K antigen titers were constantly much higher than 0 antigen titers.
