[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 rapid diagnosis of acute streptococcal infection in children].

The present work deals with trials of the method of rapid diagnosis of streptococcal infection, carried out in children's infectious hospital, with the use of a new diagnostic kit. The proposed diagnosticum has proved to be highly sensitive and specific in scarlet fever and tonsillitis. The sensitivity and specificity of the diagnosticum depend on the duration of the disease, prehospital treatment and the quality of the bacteriological analysis.

[The dynamics of detecting group-A streptococci in an infectious disease clinic].

The study revealed that the isolation rate of group A streptococci in scarlet fever patients at the time of hospitalization did not exceed 68%. The isolation rate of these streptococci was greatly influenced by antibacterial therapy carried out before hospitalization. Under clinical conditions with intensive penicillin therapy group A streptococci were eliminated from the larynx on days 3-4.

[The detection of streptococci, the study of their immunobiological properties and the determination of lipoproteinase antibodies and anti-immunoglobulins in patients with acute rheumatic fever].

Bacteriological confirmation of the presence of group A Streptococcus (GAS) in patients with acute rheumatic fever (ARF) by means of the express method was achieved only in 15.1% of the cases and the positive growth of the culture was observed only in 12.1%.