Tehran University of Medical Sciences Acta Medica Iranica 0044-6025 0 3-4 1970 12 15 63 74 R. Gharagozloo  and H. Nezam 2015 09 28 During a one year period of investigation in Teheran an average of 339 people in 93 families and from two different socio-economic levels wesre regulA significant increase in both streptococcal and non - streptococcal pharyngitis was seen during October and f"ovember. of 153 cases of phar yngitis seen, 53 (34,6%) patients were over 16 and 100 (65.2%) were under 16. 47 per cent of patients harbored beta hemolytic streptococcal, hence the infection rate per 100 persons per year for streptococcal sore throat was 2 1.2 per cent. No significant difference was seen with regard to pharyngitis among the two socio-economic groups. The overall carrier rate for beta hemolytic streptoc-occi during the year was 13.2;%. The ra te for the under 16 years was 16.0% and 9.2% for the over 16' Group I had a carrier rate of 12.2% and Group II, 14.1%. Virtually all group A strains were typable and those isolated from patients belonged to five prevalent types.arly studied and followed for streptococcal infection https://acta.tums.ac.ir/index.php/acta/article/view/4118 https://acta.tums.ac.ir/index.php/acta/article/download/4118/4093