| erythromycin-resistant group a streptococcal isolates recovered in sofia, bulgaria, from 1995 to 2001. | the frequency of erythromycin resistance within group a streptococci in sofia, bulgaria, from 1995 to 2001 was 2.1% (26 isolates). of this, 57.7% was macrolide-lincosamide-streptogramin (mls) inducible, 7.7% was mls constitutive, and 34.6% had the m phenotype. eleven different emm sequence types were found among 25 erythromycin-resistant isolates tested. nineteen of 26 erythromycin-resistant isolates were additionally resistant to tetracycline and/or chloramphenicol. | 2002 | 12354892 |