[Fast identification of Streptococcus pyogenes serotype M.12 in throat swabs by an improvised coagglutination technique].

A rapid procedure for identification of Streptococcus pyogenes serotype M. 12 directly in throat swabs, is reported and compared with standard culture method on blood agar plates and typing of group A Streptococci isolated, with double gel immuno-diffusion. This procedure consist of chlorhydric acid extraction of swabs and testing of the extract towards specific M.