the mics of three new antimicrobial agents of different classes , u-70138f , roxithromycin ( ru 965 ) , and ofloxacin ( orf 18489 ) , versus chlamydia trachomatis in mccoy cell cultures were 0.25 , 0.8 , and 1.0 microgram/ml , respectively .
C1136254
antimicrobial
C0028902
ofloxacin