MCQ – 74157

Patients with rashes in the groin region as shown in the figure below. Which of the following cannot be the cause?

A.	Aspergillus
B.	Microsporum
C.	Epidermophyton
D.	Trichophyton

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Correct Answer � A Explanation

Ans: A. Aspergillus

• Dermatophytes are fungi that require keratin for growth.
• These fungi can cause superficial infections of the skin, hair and nails.
• These anamorphic (asexual or imperfect fungi) mold genera are Microsporum, epidermophyton and trichophyton.
• Dermatophytes are spread by direct contact from other people (anthropophagic organisms), animals (zoophilic organisms) and soil (geophilic organisms).
• Diagnosis is based on the history, physical examination and potassium hydroxide (KOH) microscopy. Wood lamp examination and fungi culture or histologic examinations are occasionally required.
• Tinea cruris: Rashes appear red, scaly and pustular, often accompanied by itch. Men > women. Exacerbated by sweet and tight clothing (hence the term jock-itch). It can extend from the groin to the peripheral skin and gluteal cleft.
• Invasive infection with aspergillus most commonly seen during acute periods of neutropenia, but shifts in conditioning regimens and other strategies to promote earlier engraftment have led to infections after 30-40 days post-transplantation.