Phaeohyphomycosis

Phaeohyphomycosis is a term used to describe infections caused by darkly pigmented fungi (dematiaceous fungi). These infections can affect humans and other animals, and can occur in almost any part of the body. The term "phaeohyphomycosis" is derived from the Greek words "phaeo" (dark), "hypho" (weaving), and "mycosis" (fungal infection).

Causes

Phaeohyphomycosis is caused by a variety of dematiaceous fungi, which are found in the environment, particularly in soil and decaying plant material. These fungi are characterized by their dark pigmentation, which is due to the presence of melanin in their cell walls. Some of the most common fungi that cause phaeohyphomycosis include Exophiala, Wangiella, Curvularia, and Alternaria.

Symptoms

The symptoms of phaeohyphomycosis can vary widely, depending on the part of the body that is affected. Infections can occur in the skin, subcutaneous tissue, sinuses, eyes, central nervous system, and other organs. Symptoms may include skin lesions, nodules, ulcers, sinusitis, eye inflammation, and neurological symptoms in cases where the central nervous system is affected.

Diagnosis

Diagnosis of phaeohyphomycosis is based on the identification of the characteristic darkly pigmented fungi in tissue samples. This can be done through direct microscopic examination of the sample, culture of the fungus, or molecular methods such as polymerase chain reaction (PCR).

Treatment

Treatment of phaeohyphomycosis can be challenging, as these fungi are often resistant to many antifungal drugs. The choice of treatment depends on the severity and location of the infection, but may include surgical removal of the infected tissue and/or antifungal therapy with drugs such as itraconazole, voriconazole, or amphotericin B.

See also

• Mycosis
• Dermatophyte
• Fungal infection

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