Background: Tuberculosis is an airborne disease caused by Mycobacterium Tuberculosis (M.TB). Mycobacterium bacilli in the body will get destroyed or presented to white blood cell that could trigger immune response and ultimately establishes latent tuberculosis infection. Isoniazid preventive therapy (IPT) hinders the development of active TB in patients with latent TB infection. All HIV positive patients without contraindications are eligible for IPT.
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