Image Based Question – 74157

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

A. Aspergillus

B. Microsporum

C. Epidermophyton

D. Trichophyton

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.
• Tenia crusis: Rashes appear red, scaly and pustular, often accompanied by itch. Men > women. Exacerbated by sweet and tight clothing (hence the term jock -itch). 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.