WHO treatment guidelines for isoniazid-resistant tuberculosis: Supplement to the WHO treatment guidelines for drug-resistant tuberculosis

The emergence of drug-resistant TB (tuberculosis) is a major global health concern, which threatens the ambitious goals and progress set under the End TB Strategy. Isoniazid-resistant TB, which is present in 8% of TB cases worldwide, reduces treatment success in patients treated with the standard 6-month first-line regimen. The new WHO recommendations for the treatment of isoniazid-resistant, rifampicin-susceptible TB are based upon a review of evidence from patients treated with such regimens by a Guideline Development Group in conformity with WHO requirements for evidence-based policies.