• J. Antimicrob. Chemother. · Dec 2005

    Early bactericidal activity of a moxifloxacin and isoniazid combination in smear-positive pulmonary tuberculosis.

    • Stephen H Gillespie, Roly D Gosling, Leonard Uiso, Noel E Sam, Esther G Kanduma, and Timothy D McHugh.
    • Centre for Medical Microbiology, Hampstead Campus, Royal Free and University College Medical School, Rowland Hill Street, London NW3 2PF, UK. s.gillespie@medsch.ucl.ac.uk
    • J. Antimicrob. Chemother. 2005 Dec 1;56(6):1169-71.

    BackgroundIn vitro and animal studies have shown that moxifloxacin-containing combinations may improve the bactericidal efficacy of antituberculosis regimens.Patients And MethodsWe measured the decline in the sputum viable count of 13 patients who were given a combination of moxifloxacin 400 mg daily and isoniazid 300 mg daily.ResultsThe time required to reduce the viable count by 50% (vt50) was 0.38 days (95% CI -0.03-0.78 days, SEM 0.13) and the mean early bactericidal activity (EBA) was 0.60 log10 cfu/day (95% CI 0.23-0.97, SEM 0.14). This compares with the vt50 calculated for isoniazid and moxifloxacin alone in the same population of 0.48 and 0.88 days, respectively. The EBA values for isoniazid and moxifloxacin alone were 0.77 and 0.53 log10 cfu/day, respectively.ConclusionsThe combination of moxifloxacin and isoniazid is not antagonistic, but the combination does not significantly enhance bactericidal activity above that of isoniazid alone.

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