Abstract

Purpose of review
Tuberculosis (TB) remains a global emergency and continues to kill 1.4 million people every year. The interaction between noncommunicable and infectious diseases like TB has important implications with regard to the attainment of the Millennium Development Goals (MDGs). Smoking, diabetes mellitus, anti-TNFα drugs and other immunosuppressive therapies are well known major risk factors associated with TB. The purpose of this review is to summarize the recent literature on these risk factors and interventions that reduce the risk.
Recent findings
Mathematical models and aggregate data from the field show that smoking, diabetes and anti-TNFα drugs independently increase the risk of developing active TB. There is consensus on the great need for screening for active TB disease in patients with these conditions and targeted preventive interventions through a combined multidisciplinary approach.
Summary
Smoking, diabetes mellitus, anti-TNFa drugs and new immunosuppressive treatments represent important common risk factors for TB. A high degree of clinical awareness of the possibility of TB should be considered in patients with these risk factors, and active screening and prevention should be undertaken. Further operational research is needed to optimize screening for latent Mycobacterium tuberculosis infection, instituting preventive intervention measures.

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