PRELIMINARY STUDY ON THE SEROLOGICAL TYPES OF STREPTOCOCCUS MUTANS

<正> Dental caries is the most common bacterial disease afflicting human beings and has long been taken seriously both by the public health authorities and by professional dentists. Since the sixities, as Streptococcus mutans has been implicated as a causative agent of dental caries, the etiological role of this organism has been the subject of laborious research and considerable progress has been made on the cultivation, metabolism, an-