EUROPEAN JOURNAL OF PEDIATRICS, cilt.155, sa.9, ss.780-782, 1996 (SCI-Expanded, Scopus)
The frequency of resistance to erythromycin of group A beta-haemolytic streptococci in the last 7 years was determined in three medical centres in Ankara, While all group A beta-haemolytic streptococci strains were susceptible to penicillin, a gradual increase in resistance to erythromycin until 1992 was observed. However, a substantial increase in erythromycin resistance occurred in 1993 when newer macrolides became available and were widely used in the latter part of 1992.