In Vitro Effects of Spectinomycin and Ceftriaxone Alone or in Combination with Other Antibiotics against Chlamydia trachomatis

ABSTRACT The in vitro effects of spectinomycin and ceftriaxone, alone or in combination with erythromycin, ofloxacin, and doxycycline, against Chlamydia trachomatis were investigated by the checkerboard method and compared by Ridit (reference identical unit) analysis. A combination of spectinomycin with erythromycin or doxycycline was found to be more effective than that of ceftriaxone.

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