Tinea cruris is a fungal infection of groin and adjacent skin.

• A. Viral infection of groin
• B. Bacterial infection of groin
• C. Fungal infection of groin and adjacent skin
• D. Parasitic infection of groin

Answer: (C)

Tinea cruris is a fungal infection of keratinized skin in the groin and the surrounding areas. The term tinea refers to dermatophyte fungi that invade the outer skin, hair, and nails. In the groin, it typically shows up as itchy, well-defined patches with scaling and sometimes central clearing—the classic “jock itch” pattern. Because the condition is caused by fungi and involves the groin plus adjacent skin, describing it as a fungal infection of that area is the accurate characterization. It’s not a viral process (as seen with some groin rashes like herpes), nor a bacterial infection (such as cellulitis or folliculitis), nor a parasitic infestation (like scabies). The emphasis is on the fungal origin and the anatomical distribution, which is exactly what this statement captures.