In vitro drug susceptibility of Chlamydia sp. strain TWAR

The in vitro susceptibilities of eight Chlamydia sp. strain TWAR isolates were tested against tetracycline, erythromycin, penicillin, ampicillin, sulfisoxazole, and a new drug, trospectomycin. The ranges of inhibitory concentrations of these antimicrobial agents, except for sulfonamide, were similar to those for Chlamydia trachomatis. Sulfisoxazole was not inhibitory at the highest nontoxic concentration tested.