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Interactions of ciprofloxacin with clindamycin, metronidazole, cefoxitin, cefotaxime, and mezlocillin against gram-positive and gram-negative anaerobic bacteria. 1987

J L Whiting, and N Cheng, and A W Chow
Department of Medicine, University of British Columbia, Vancouver, Canada.

A total of 598 clinical isolates of anaerobic bacteria were tested against ciprofloxacin by the agar dilution technique with 10(5) CFU on Wilkins-Chalgren medium. Selected strains representative of the six major genera of anaerobes relatively resistant to the quinolones were tested for interactions with ciprofloxacin in combination with clindamycin, metronidazole, cefoxitin, cefotaxime, or mezlocillin by using a checkerboard agar dilution technique. Cefotaxime-ciprofloxacin and clindamycin-ciprofloxacin were the most effective combinations, with 16% of all isolates and 44% of the Bacteroides fragilis group isolates responding synergistically to the former combination and 9% of all isolates and 37% of Peptostreptococcus isolates responding synergistically to the latter. Occasional synergy was seen with all other antibiotic combinations except for metronidazole-ciprofloxacin. Likewise, synergism was seen with all groups of anaerobes except for Fusobacterium species. Antagonistic interactions were observed only with a Peptostreptococcus intermedius strain tested against clindamycin-ciprofloxacin. These data suggest that combinations of ciprofloxacin with these agents may be useful for certain resistant anaerobic infections.

UI MeSH Term Description Entries
D008795 Metronidazole A nitroimidazole used to treat AMEBIASIS; VAGINITIS; TRICHOMONAS INFECTIONS; GIARDIASIS; ANAEROBIC BACTERIA; and TREPONEMAL INFECTIONS. 2-Methyl-5-nitroimidazole-1-ethanol,Bayer 5360,Clont,Danizol,Flagyl,Gineflavir,Metric,MetroGel,Metrodzhil,Metrogyl,Metronidazole Hydrochloride,Metronidazole Monohydrochloride,Metronidazole Phosphate,Metronidazole Phosphoester,Satric,Trichazol,Trichopol,Trivazol,Vagilen,2 Methyl 5 nitroimidazole 1 ethanol
D008802 Mezlocillin Semisynthetic ampicillin-derived acylureido penicillin. It has been proposed for infections with certain anaerobes and may be useful in inner ear, bile, and CNS infections. Bay-f 1353,Baypen,Melocin,Meslocillin,Mezlin,Mezlocillin Sodium,Mezlocilline,Bay f 1353,Bayf 1353,Sodium, Mezlocillin
D002439 Cefotaxime Semisynthetic broad-spectrum cephalosporin. Benaxima,Biosint,Cefotaxim,Cefotaxime Sodium,Cefradil,Cephotaxim,Claforan,Fotexina,HR-756,Kendrick,Klaforan,Primafen,Ru-24756,Taporin,HR 756,HR756,Ru 24756,Ru24756,Sodium, Cefotaxime
D002440 Cefoxitin A semisynthetic cephamycin antibiotic resistant to beta-lactamase. Cefoxitin Sodium,MK-306,Mefoxin,Mefoxitin,Méfoxin,MK 306,MK306,Sodium, Cefoxitin
D002939 Ciprofloxacin A broad-spectrum antimicrobial carboxyfluoroquinoline. Bay-09867,Ciprinol,Cipro,Ciprofloxacin Hydrochloride,Ciprofloxacin Hydrochloride Anhydrous,Ciprofloxacin Monohydrochloride Monohydrate,Anhydrous, Ciprofloxacin Hydrochloride,Bay 09867,Bay09867,Hydrochloride Anhydrous, Ciprofloxacin,Hydrochloride, Ciprofloxacin,Monohydrate, Ciprofloxacin Monohydrochloride,Monohydrochloride Monohydrate, Ciprofloxacin
D004347 Drug Interactions The action of a drug that may affect the activity, metabolism, or toxicity of another drug. Drug Interaction,Interaction, Drug,Interactions, Drug
D004357 Drug Synergism The action of a drug in promoting or enhancing the effectiveness of another drug. Drug Potentiation,Drug Augmentation,Augmentation, Drug,Augmentations, Drug,Drug Augmentations,Drug Potentiations,Drug Synergisms,Potentiation, Drug,Potentiations, Drug,Synergism, Drug,Synergisms, Drug
D006089 Gram-Negative Anaerobic Bacteria A large group of anaerobic bacteria which show up as pink (negative) when treated by the Gram-staining method. Gram Negative Anaerobic Bacteria
D006094 Gram-Positive Bacteria Bacteria which retain the crystal violet stain when treated by Gram's method. Gram Positive Bacteria
D001421 Bacteria, Anaerobic Bacteria that can survive and grow in the complete, or nearly complete absence of oxygen. Anaerobic Bacteria

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