Which type of fungus commonly affects toenails?

• A. Tinea corporis
• B. Tinea unguium
• C. Candida albicans
• D. Aspergillus

Answer: (B)

The type of fungus commonly affecting toenails is Tinea unguium, also known as onychomycosis. This specific infection targets the nails, leading to changes in their appearance, such as discoloration, thickening, and brittleness. Tinea unguium is predominantly caused by dermatophyte fungi, which thrive in warm, moist environments, making toenails particularly susceptible, especially when proper hygiene and care are not followed.

Tinea corporis, on the other hand, refers to ringworm of the body and primarily affects the skin, not the nails. Candida albicans primarily causes infections in moist, mucosal areas of the body, such as the mouth or genital region, rather than the nails. Aspergillus is a genus of mold that can affect the respiratory system and can cause other health issues, but it is not typically associated with toenail infections. Understanding these distinctions highlights why Tinea unguium is specifically related to toenail infections.