Immunological aspects of immunodeficiency diseases part 74

Immune 3

 

Individuals with impaired  T-cell-mediated immunity (eg SCID or HIV infection) are highly susceptible to mycobacterial infections, including infections caused by poorly pathogenic mycobacterial species (nontuberculous mycobacteria and BCG). However, disseminated life-threatening infections by these organisms may also occur in the absence  of a recognized primary or secondary immunodeficiency. Genetic analysis of affected kindred to date have identified mutations in seven different genes  that participate in the production or response to IFN-γ. These patients are classified  under the heading Mendelian susceptibility to mycobacterial disease (MSMD). The genetic lesion s responsible for MSMD affect the  integrity of IL-12/23-dependent IFN-γ pathway.

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