[Role of various diseases of the upper respiratory tract in the epidemiological process of streptococcal infections].

Investigations conducted with the use of a specially elaborated method revealed a specific association of some (15--24%) of diseases diagnosed clinically as "acute respiratory affection" (ARA) with streptococcus infection. This was also confirmed by detection of an epidemiological association of ARA with scarlet fever revealed in some child collective bodies. The data obtained pointed to the definite role played by such diseases in the epidemic process in streptococcus infections.