passages.id: split_6_test_1841_passage
passages.type: progene_text
passages.text: E-4767 and E-5065 were 356 - and 32 - fold more potent than ciprofloxacin against Bacteroides spp. , and their MIC(90)s for Clostridium spp. were 0.25 and 0.5 microg / ml , respectively .