Prevalence, group pattern, T pattern and seasonal variation of beta haemolytic streptococci in and around Shimla

One hundred and seventy two strains of beta haemolytic streptococci were isolated from various clinical specimens over a period of one year. Group A was isolated in 69.70% and group C in 16.80 percent. Majority of the strains were isolated during winter season and only 21.00 percent in summer 93.30 percent strains were bacitracin sensitive and all were sensitive to penicillin. The most common T pattern among group A was found to be 5/11/12/27/44 followed by 3/13/B 3264.