[The characteristics of a Russian-made kit for the serological identification of streptococci groups A, B and C].

The first Soviet kits for the serological identification of streptococci, groups A, B, and C, on the basis of the coagglutination test were developed. Each kit was intended for 35-40 determinations. The optimum concentration of streptococci during their identification by means of the reagents making up the kit was about 1.

[The effect of sodium nucleinate on the population characteristics of Streptococcus groups A and C].

The influence of sodium nucleinate on the growth kinetics, streptokinase activity and virulence of streptococcal populations, groups A and C, was studied. As revealed in these studies, the kinetics of the growth of the populations of both strains in the exponential phase did not depend on the concentration of sodium nucleinate in the culture medium. Measurements made on hours 15, 20 and 24 of growth showed the presence of close, direct and statistically significant correlation between the content of biomass, as well as streptokinase activity and specific streptokinase activity, and the concentration of sodium nucleinate in the culture medium.