Mycobacterioses in Pigmented Ethnic Skin

Mycobacterial organisms have reemerged as an important cause of infectious disease worldwide. Both tuberculosis and nontuberculous mycobacterial infections remain endemic in many parts of the globe, especially in low- and middle-income countries, becoming more common in patients with iatrogenic immunosuppression and HIV infection. Mycobacteria responsible for most cutaneous diseases are M. tuberculosis, M. marinum, M. ulcerans, M. fortuitum, M. chelonae, and M. avium-intracellulare. More rare are skin infections caused by M. scrofulaceum, M. szulgai, M. kansasii, or M. haemophilum.