Table of Contents
Definition of Tinea
Several species of fungi, known collectively as dermatophytes, cause tinea infection (also called dermatophytosis). People commonly refer to some forms of tinea as ringworm because the lesions have the appearance of worms ringed beneath the surface of the skin.
Though descriptive this is a misnomer as tinea has nothing to do with worms. There are numerous designations of tinea based on where it appears on the body, though the same group of dermatophytes can cause any of tinea’s presentations.
|Tinea Infection||Common Name||Body Region Affected|
|tinea barbae||ringworm||beard area of the face|
|tinea cruris||jock itch||genitals|
|tinea corporis||ringworm||central trunk, arms, and legs|
|tinea pedis||athlete’s foot||bottom of the foot and between the toes|
Tinea is fairly contagious and spreads from person to person as well as through contact with surfaces, such as shower floors or soil, that can harbor the fungi. Dermatophytes can exist outside the body for a considerable length of time and thrive in environments that are warm and moist.
Symptoms and Diagnostic Path
The symptoms of tinea vary somewhat according to the part of the body affected, though generally include
- Itching (pruritus), which may be intense, or pain
- Redness (erythema)
- Lesions that may appear as papules, vesicles, or plaques
- Cracking or scaling of the lesions
- Irregular hair loss (alopecia) when the site of the infection is the scalp
The diagnostic path is generally straightforward. The doctor may take small scrapings of affected tissue to examine under a microscope. Such examination reveals the dermatophytes or evidence of their presence, which is conclusive for diagnosis. Inability to identify evidence of dermatophytes points to other causes for the symptoms.
Treatment Options and Outlook
Topical antifungal medications often effectively treat all forms of tinea except those involving the hair or nails. Prescription antifungal medications produce the most reliable results; over-thecounter products may require multiple applications. Because many people who acquire tinea continue the activities that resulted in exposure, reinfection is common.
Pervasive or resistant tinea may require oral antifungal medications to attack the infection systemically. Oral antifungal therapy is necessary to eradicate tinea that involves the hair or the nails. Treatment may require up to eight weeks for some infections, particularly those involving the nails and the feet (tinea pedis).
|COMMON ANTIFUNGAL MEDICATIONS FOR TREATING TINEA|
|econazole (topical)||fluconazole (oral)|
|griseofulvin (oral)||itraconazole (oral)|
|ketoconazole (topical and oral)||miconazole (topical)|
|naftifine (topical)||oxiconazole (topical)|
|sertaconazole (topical)||terbinafine (topical and oral)|
Risk Factors and Preventive Measures
Common environmental settings in which dermatophytes thrive include communal showers, spas, and swimming pools. Wearing water socks or sandals when walking on wet surfaces helps protect the feet from contact with the fungi.
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