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Fungal Human Pathogens: Mycosis Categories

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State

Cutaneous and systemic mycoses classify by depth of invasion; opportunistic instead names infections striking a weakened host.

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Athlete's foot is cutaneous; histoplasmosis, entering the lungs, is systemic; candidiasis is opportunistic and can itself turn systemic.

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Opportunistic classifies by host condition, not depth, and cuts across cutaneous and systemic — an opportunistic mycosis can itself be systemic.