They are cause parasitic infection (dermatophytes)
Ringworm – Superficial Fungus Infection
Ringworm is a dermatophyte infection. Dermatophytes are a group of related fungi that infect and survive on dead keratin, the top layer of the epidermis. The following are the most common fungi responsible for ringworm:
# Trichophyton rubrum
# Microsporum canis
# Trichophyton mentagrophytes
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The most common appearance of ringworm is a lesion that starts as a flat, scaly spot which then develops a raised border that advances outward in a circle. The advancing border is red, raised, and scaly while the central area is more normal appearing, usually still with fine scaling. Some ringworm infections, especially those treated with a steroid like hydrocortisone, can have vesicles or pustules in the advancing border or in the center.
Ringworm – Topical Treatment
In general ringworm responds well to topical treatment. It is applied twice daily until symptoms resolve (usually within two weeks[citation needed]), however if constantly touched it can leave a dark patch of skin where it had been. In more severe cases or where there is scalp ringworm, systemic treatment with oral medications may be given.. The most commonly used antifungal creams are:
* Miconazole (Monistat)
* Clotrimazole (Mycelex)
* Ketoconazole (Nizoral)
* Terbinafine (Lamisil)
Ringworm – Oral Treatment
If there are several ringworm lesions or if the lesions are extensive, oral antifungal medications can be used. Oral medications are taken once a day for 7 days and result in a 100% clinical cure rate. The recommended oral antifungal medications are:
* Terbinafine (Lamisil) 250 mg
* Itraconazole (Sporanox) 200 mg
How To Prevent Ringworm
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