Mutations in a 23S rRNA Gene of Chlamydia trachomatis Associated with Resistance to Macrolides

Abstract
For six clinical isolates of Chlamydia trachomatis , in vitro susceptibility to erythromycin, azithromycin, and josamycin has been determined. Four isolates were resistant to all the antibiotics and had the mutations A2058C and T2611C ( Escherichia coli numbering) in the 23S rRNA gene. All the isolates had mixed populations of bacteria that did and did not carry 23S rRNA gene mutations.