Jock itch

‘Jock itch’ is caused by

[A] Erythrasma
[B] Pityriasis versicolor
[C] Lichen planus
[D] T. Cruris

T. Cruris – Dhobi itch or jock itch
✴️ Tinea cruris-
▪️ known as jock itch
▪️ infection involving the genital, pubic, perineal, and perianal skin
▪️caused by pathogenic fungi known as dermatophytes.

Most frequent cause of tinea cruris [Dhobi itch or jock itch]

[A] Trichophyton mentagrophytes
[B] Trichophyton verrucosum
[C] Trichophyton rubrum
[D] Epidermophyton floccosum

[C] Trichophyton rubrum

✴️ Most common etiologic agents for tinea cruris include – Trichophyton rubrum and Epidermophyton floccosum;
✴️ Less commonly Trichophyton mentagrophytes and Trichophyton verrucosum are involved.

For microscopic and culture study of a person wth Tinea cruris sample should be obtained from

[A] Center of lesion
[B] Leading edge of lesion
[C] Skin Biopsy
[D] Excisional biopsy

✴️ [B] Leading edge of lesion

✴️ In most cases, tinea cruris can be diagnosed clinically
✴️ Sample should be obtained from the leading edge of the lesion to ensure an adequate collection of infected scales
✴️ Potassium hydroxide (KOH) mounts are generally procured with a scalpel scraping technique; however, new studies have indicated that utilizing a cellophane adhesive tape method may simplify the collection process, facilitate transportation, provide a higher quality sample, and improve slide preservation time

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