Concomitant disseminated histoplasmosis and disseminated tuberculosis after tumor necrosis factor inhibitor treatment: a case report

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BACKGROUND: Tumor necrosis factor antagonist inhibitors have transformed the approach to patients with severe autoimmune conditions, such as rheumatoid arthritis. Although the therapy can be highly effective, TNF-α inhibitors are associated with an increased risk of opportunistic infections. CASE PRESENTATION: Here, we report a case of concomitant disseminated histoplasmosis and tuberculosis in a 65-year-old female with rheumatoid arthritis treated with TNF-α inhibitor. Both conditions can be found in disseminated form in immunosuppressed hosts, but co-infection is rare with only a few cases having been reported, to our knowledge, all in HIV patients. CONCLUSIONS: This case posed a considerable challenge for diagnosis and treatment due to the unusual disseminated co-infection, the overlapping symptoms, and the interactions between medications.

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