Autosomal recessive mutation: A case report of a Sudanese child and his father.

Introduction: Mendelian susceptibility to mycobacterial disease (MSMD) is a rare inherited condition characterized by selective susceptibility to weakly virulent mycobacteria, such as substrains of the bacille Calmette-Guérin (BCG) vaccine and different environmental mycobacteria.

Case Presentation: A 7-year-old Sudanese boy was referred to the immunology clinic with a suspected diagnosis of MSMD. This followed multiple presentations with disseminated tuberculosis and typhoid fever.