A human eyelash (hair surface) with an unknown fungus infection, coloured scanning electron micrograph (SEM). This infection is a type of superficial mycoses that is limited to the outermost layers of the hair or skin. The fungus alone has only a minimal capacity to damage skin directly. Superficial mycoses affect approximately 9 million Americans and account for 5% of skin diseases. These fungi invade only the dead or keratinized layers of the skin, hair and nails. However, an impaired immune system can encourage the infecting fungus to proliferate. Magnification: x240 when shortest axis printed at 25 millimetres.
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