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Interventions for Tuberculosis Control and Elimination 2002

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twice rather than once per day, reduce the frequency of adverse drug events.<br />

Stevens-Johnson syndrome has been reported in an HIV-infected patient. 1025<br />

Cycloserine appears to interact with alcohol, increasing the toxic effects<br />

of alcohol. 1026<br />

Determination of resistance to cycloserine is difficult, <strong>and</strong> the correspondence<br />

of laboratory results with clinical data is poor (figure 90). 466<br />

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Figure 90. Proportion of strains of M. tuberculosis from resected lungs, in vitro<br />

resistant to anti-tuberculosis drugs, as a function of duration of treatment, the strain<br />

containing no susceptible organisms. Reproduced from 466 by the permission of the<br />

publisher American Thoracic Society at the American Lung Association.<br />

Para-aminosalicylic acid<br />

In 1940, Bernheim demonstrated that salicylic acid <strong>and</strong> benzoic acid<br />

increased the oxygen consumption <strong>and</strong> carbon dioxide production of<br />

M. tuberculosis. 1027 Based on these observations, Lehmann investigated<br />

more than 50 derivatives of benzoic acid with the purpose of finding a substance<br />

possessing activities against M. tuberculosis. The most active compound<br />

he identified in the experiments was para-aminosalicylic acid, first<br />

published as preliminary results in the Lancet in 1946. 1028 Soon thereafter<br />

the first reports appeared, demonstrating its considerable anti-tuberculosis

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