combinations of edta-tromethamine and 7 antimicrobial agents [ chloramphenicol , nalidixic acid , oxytetracycline , penicillin , polymyxin b , streptomycin , and triple sulfa ( sulfamethazine , sulfapyridine , and sulfathiazole ] ) were tested for synergistic activities against escherichia coli .
C1136254
antimicrobial agents
C0030092
oxytetracycline