what are the causes of black tinea and black tinea
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Etiology of tinea nigricans
First, the cause of the disease
There are two types of pathogenic fungi, namely cladosporium werneckii, which are found in North and South America and Australia; The other type, C. mansonii, is found in Asia and Africa.
Second, the pathogenesis
Superficial fungi invade skin in palms and plantars. The initial damage is black or brown spot, which is similar to pigmentation left by silver nitrate or ink coated on the skin. The surface is not high, generally without scales, sometimes with scales or mild keratinization, obvious boundary and lack of conscious symptoms.