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Bactericidal and sterilizing activities of antituberculosis drugs during the first 14 days.

Abstract：

:Colony-forming units of Mycobacterium tuberculosis in sputum were counted at 2-day intervals in 100 patients treated with 22 regimens of isoniazid, rifampin, pyrazinamide, ethambutol, or streptomycin, given alone or in combinations. The exponential fall in colony-forming units was measured by linear regression coefficients of the log counts during the initial 2-day phase of rapid, drug-determined killing and during the subsequent 12 days of much slower sterilizing activity. The regression coefficients during the first 2 days varied significantly according to the drug; the greatest effects in multiple regression analyses were due to isoniazid (p < 0.001) and rifampin (p = 0.027). The rapid kill obtained with isoniazid was unaffected by addition of other drugs, so that a change in activity after adding an unknown drug to isoniazid would not be measurable. In multiple regression analysis of the coefficients during Days 2-14, rifampin and streptomycin had significant effects (p = 0.007 and 0.006, respectively), indicating that both drugs had important sterilizing activity, streptomycin particularly early. Isoniazid and pyrazinamide had no significant effects. In analyses of combined drug regimens only, ethambutol had an effect (p = 0.01) in reverse direction to that of rifampin, suggesting it antagonized the sterilizing activity of other drugs.

journal_name

Am J Respir Crit Care Med

journal_title

American journal of respiratory and critical care medicine

authors

Jindani A,Doré CJ,Mitchison DA

doi

10.1164/rccm.200210-1125OC

keywords:

subject

Has Abstract

pub_date

2003-05-15 00:00:00

pages

1348-54

issue

10

eissn

1073-449X

issn

1535-4970

pii

200210-1125OC

journal_volume

167

pub_type

杂志文章

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