Question

Aspergillus causes all of the following except?

• A. Bronchopulmonary allergy
• B. Otomycosis
• C. Dermatophytosis
• D. Allergic sinusitis

Hint:

Ringworm of skin and nails is caused by dermatophytes, not by a mould like Aspergillus.

Answer 1

The Correct Option is C

Step 1: The stem asks which condition is not in the Aspergillus disease list, so identify the true Aspergillus syndromes first.

Step 2: Aspergillus species trigger hypersensitivity disease in the lung (ABPA) and the paranasal sinuses (allergic fungal sinusitis), and they colonise the ear canal to produce otomycosis. All three are well documented Aspergillus presentations.

Step 3: Ringworm of the skin and nails, termed dermatophytosis, is the work of keratinophilic dermatophytes such as Trichophyton and Microsporum. Aspergillus is not a dermatophyte and does not cause classic ringworm.

Step 4: Therefore the single odd one out is dermatophytosis.

\[\boxed{\text{Dermatophytosis}}\]