Sputa will be collected at enrolment. Participants will be asked to provide an additional (third) sputum. For the purpose of this study, this sputum will be added to the leftover 2 sputa provided for the routine diagnosis of tuberculosis in order to reach in total at least 5 mL sputum. DNA will be extracted from a part of the sputum for the genotypic characterization Mycobacterium tuberculosis (spoligotype analysis).