A case of disseminated nontuberculous mycobacteria(l) (NTM) infection in a patient with positive neutralizing anti-interferon-γ (IFN-γ) autoantibodies involving bone, bronchus, systemic lymph nodes, and skin is reported. The causative NTMs were two different strains: Mycobacterium gordonae, which rarely causes true disease, and Mycobacterium mantenii, which is extremely rare. Anti-mycobacterial treatment successfully ameliorated all disseminated lesions. Although the concentration of anti-IFN-γ autoantibodies increased during the pre-treatment period, it gradually decreased after anti-mycobacterial treatment was started.
Keywords: Anti-IFN-γ neutralizing autoantibodies; Disseminated nontuberculous mycobacterium infection; Mycobacterium gordonae; Mycobacterium mantenii.
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