Tinea nigra
Tinea nigra is a superficial fungal infection that primarily affects the skin. It is characterized by dark, pigmented patches, typically on the palms of the hands or soles of the feet.
Pronunciation
Tinea nigra is pronounced as "tin-ee-uh ny-gruh".
Etymology
The term "Tinea nigra" is derived from Latin, where "tinea" means "worm" and "nigra" means "black". This refers to the black, worm-like appearance of the fungal infection on the skin.
Symptoms
The primary symptom of Tinea nigra is the appearance of a dark, pigmented patch on the skin. This patch is typically painless and does not itch. It may slowly increase in size over time.
Causes
Tinea nigra is caused by a type of fungus known as Hortaea werneckii. This fungus is found in soil, sewage, and decomposing vegetation. It is not typically harmful, but can cause infection if it enters the skin through a cut or scrape.
Diagnosis
Diagnosis of Tinea nigra is typically made through a physical examination of the skin. A doctor may also take a skin scraping to examine under a microscope. This can help confirm the presence of the Hortaea werneckii fungus.
Treatment
Treatment for Tinea nigra typically involves the use of antifungal medications. These may be applied topically to the skin, or taken orally in severe cases.
Related Terms
- Dermatophytosis: A general term for fungal infection of the skin.
- Tinea: A group of diseases caused by a fungus, typically characterized by itchy, scaly patches on the skin.
- Hortaea werneckii: The fungus that causes Tinea nigra.
External links
- Medical encyclopedia article on Tinea nigra
- Wikipedia's article - Tinea nigra
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