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Important questions exist regarding the ability to treat extensively drug-resistant tuberculosis. In this study involving 48 patients in Peru who had extensively drug-resistant tuberculosis but were not infected with the human immunodeficiency virus, treatment with a structured, comprehensive, community-based approach and aggressive antituberculosis medications (an average of five or six medications per patient) achieved a cure in 29 patients (60%).
In 48 patients in Peru who had extensively drug-resistant tuberculosis, treatment with a structured, comprehensive, community-based approach and aggressive antituberculosis medications achieved a cure in 29 patients (60%).
Extensively drug-resistant tuberculosis has been reported in 45 countries
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since it was first described in 2006. This seminal survey found extensively drug-resistant tuberculosis — then defined as
Mycobacterium tuberculosis
strains with resistance to at least isoniazid, rifampin, and members of three of six classes of second-line drugs — in 10% of multidrug-resistant tuberculosis strains collected on six continents.
2
Isoniazid and rifampin are the anchors of standard first-line therapy.
3
Resistance to these two drugs, which defines multidrug-resistant tuberculosis, is associated with a decreased probability of cure.
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–
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Treatment regimens for multidrug-resistant tuberculosis rely on the most active second-line drug classes — . . .