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Updated: Jan 12, 2026

Isolation and Identification of Waterborne Antibiotic-Resistant Bacteria and Molecular Characterization of their Antibiotic Resistance Genes
Published on: March 3, 2023
Erythromycin-resistant group A streptococcal isolates recovered in Sofia, Bulgaria, from 1995 to 2001
Antoaneta Detcheva1, Richard R Facklam, Bernard Beall
1National Center of Infectious and Parasitic Diseases, 26 Yanko Sakazov Boulevard, Sofia 1504, Bulgaria. Detcheva@hotmail.com
Abstract:
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.

