[A study of "T type 12" or "T type 12-related type" of group A streptococci in an outpatient clinic].
D006801:Humans; D007564:Japan; D008722:Methods; D013290:Streptococcal Infections / Q000453:epidemiology; D013297:Streptococcus pyogenes / Q000145:classification / Q000302:isolation & purification*