During the last years the appearance of the infections of "new" generation as though has moved "classic" venereal infections to the background. This paper defines the character of the morbidity of the urogenital ureaplasmic infection as compared with the data throughout Russia as a whole and concerning other regions depending on the territorial, demographic, and social features. Some decrease in the level of the sickness rate of urogenital infections especially as to "new" generation infections, which is officially recorded, is determined by their low active detectability, bad differential diagnostics, frequent absence of examination or underexamination, vast opportunities for anonymous treatment, increase in number of illegal treatment and self-treatment, accessibility of etiotropic drugs.