| antigenicity of group b streptococcus strain "m9" and its prevalence in japan. | serological typing of group b streptococci is important for the epidemiological study of group b streptococcal infections. these days, non typable (nt) strains by conventional serotypes were on an increase. in 1984, strain "m9" was isolated from a pregnant woman in meijo hospital, nagoya city; herein the antigenicity and prevalence of strains typed as "m9" were investigated and discussed. the results obtained were as follows: 1) it was confirmed that strain "m9" had a new polysaccharide antigen, ... | 1990 | 2193068 |