Unlabelled: Tuberculosis prevention is classically based on early detection of potential contagious cases and their effective treatment. But due to new parameters such as migration flows around the world, the emergence of Mycobacterium tuberculosis resistant strains and the increase of the population at risk, screening should be more active and target those who are more vulnerable to developing the disease. Traditional screening methods such as chest X-ray and tuberculin skin test, due to their high sensitivity and low cost, remain valid especially in populations with a high prevalence of the disease. The interferon-gamma release assays (IGRAs) seem to be very useful in immunodeficient patients with prior BCG vaccination. The treatment of subjects at high risk of developing active tuberculosis with a daily isoniazid self-administrated dosage for a period of 9 months is a prevention measure not only at the individual level but also at the collective one. All prevention interventions should be part of a national program concordant with the guidelines of the WHO Stop TB program that recommend a universal access to quality diagnosis and treatment focused on the patient.
Outlook: New methods of detection based on gene amplification would better suit to detect tuberculosis in immunodeficient patients and identify treatment-resistant strains. The development of the third part of the Stop TB project would reduce the morbidity and mortality of this disease by 2025.
Conclusion: The prevention of tuberculosis has been a major epidemiological challenge around the world and is continuously improving to adapt to the evolving disease.
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