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748 Mendelian susceptibility to mycobacterial diseases

definition

Mendelian susceptibility to mycobacterial diseases (MSMD) is a rare immunodeficiency syndrome, characterized by a narrow vulnerability to poorly virulent mycobacteria, such as bacillus Calmette-Guérin (BCG) vaccines and environmental mycobacteria (EM), and defined by severe, recurrent infections, either disseminated or localized.

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