Methode rapide de groupage des streptocoques beta-hemolytiques par coagglutination extemporanee

Extemporaneous coagglutination procedure for the serological grouping of beta-hemolytic streptococci is reported. Streptococcal group antigens were extracted with nitrous acid. 250 strains of groups A, B, C, F and G streptococci were tested with this method. An agreement of 100% was found between this method and the Lancefield capillary precipitation procedure Extremporaneous coagglutination method was found to be rapid, reliable, easy and economical and could he adopted in any routine diagnostic laboratory