Tinea Corporis

Treat a limited, treatment-naive eruption consistent with tinea corporis using topical therapy alone when there is no hair, nail, hand, or extensive multisite involvement. Limited tinea corporis is generally manageable with a topical antifungal, whereas tinea capitis, tinea barbae, tinea manuum, and onychomycosis usually require systemic treatment. BMJBMJDermatophyte infections - Symptoms, diagnosis and treatment | BMJ Best Practice US

Before selecting therapy, document lesion count and body sites, duration, prior antifungal exposure, use of topical corticosteroids or steroid-antifungal combinations, household clustering, contact-sport or communal-facility exposure, and animal contact. Zoonotic transmission from domestic animals and indirect transmission in environments such as locker rooms and swimming pools facilitate spread; a continuing source can explain apparent relapse after otherwise appropriate therapy. Nature+1NatureThe dual role of azoles: lifesaving antifungals and drivers of resistancePubMedA comparison of the existing recommendations for human and veterinary clinicians on the management and prevention of the zoonotic aspects of dermatophytosis: A scoping review - PubMed

Do not treat an atypical eruption indefinitely as dermatophytosis. Contact dermatitis, bacterial folliculitis, psoriasis, and eczema can resemble dermatophyte infection. A morphology modified by topical corticosteroids should increase the need for mycologic confirmation rather than prompt escalation of steroid potency. Wiley+1WileyMajor challenges and perspectives in the diagnostics and treatment of dermatophyte infections - Gnat - 2020 - Journal of Applied Microbiology - Wiley Online LibraryPubMedExpert Consensus on The Management of Dermatophytosis in India (ECTODERM India) - PubMed

Use direct microscopy and fungal culture when lesions are atypical, when prior topical steroids have altered the presentation, or when oral treatment is contemplated. Dermatophytosis overlaps clinically with eczema, psoriasis, contact dermatitis, and bacterial folliculitis; confirmation prevents unnecessary antifungal escalation and redirects treatment when microscopy or culture does not support dermatophyte infection. WileyWileyMajor challenges and perspectives in the diagnostics and treatment of dermatophyte infections - Gnat - 2020 - Journal of Applied Microbiology - Wiley Online Library

Obtain fungal culture in chronic, recurrent, relapsing, recalcitrant, or multisite tinea. A recurrence within weeks after completing therapy is described as recurrent dermatophytosis, whereas recalcitrant disease is lack of clinical cure despite an appropriate systemic antifungal dose and duration; these patterns should trigger culture rather than empiric serial drug changes. Wolters Kluwer+1Wolters KluwerSystemic Therapy of Dermatophytosis: Practical and... : Clinical Dermatology ReviewPubMedExpert Consensus on The Management of Dermatophytosis in India (ECTODERM India) - PubMed

When culture is obtained, request species-level identification where the laboratory can provide it, especially after terbinafine failure or in extensive disease. Terbinafine resistance is increasingly reported among Trichophyton species, and Trichophyton indotineae is an emerging cause of difficult-to-treat dermatophytosis. JAMA+3JAMAEffect of Different Itraconazole Dosing Regimens in Adult Patients ...NatureThe dual role of azoles: lifesaving antifungals and drivers of resistanceScienceDirectEmergent insights on the spread of antifungal-resistant Trichophyton indotineae dermatophyte: Clonal expansion, adaptability dynamics and human–animal host adaptation - ScienceDirectScienceDirectMulti-drug resistance Trichophyton indotineae in a stray dog - ScienceDirect

For nonextensive tinea corporis, use terbinafine 1% cream or gel twice daily for 1-2 weeks. Miconazole is an alternative topical regimen used for 3-4 weeks. These recommendations apply to adults and children, including pregnant patients, for tinea that is not extensive. WHOWHO[PDF] Guidelines on the treatment of skin and oral HIV-associated ... - IRIS

For localized, naive tinea corporis, topical monotherapy is the recommended approach. Topical antifungals from the allylamine and azole classes are commonly used; evidence syntheses informing dermatomycosis guidelines include numerous randomized trials of topical agents for tinea corporis and cruris. Wolters Kluwer+2Wolters KluwerTreatment Approach for Superficial... : Clinical Dermatology ReviewWileyGuidelines for the management of dermatomycosis (2019)PubMedExpert Consensus on The Management of Dermatophytosis in India (ECTODERM India) - PubMed

Explicitly discontinue over-the-counter steroid-antifungal combination products and avoid prescribing topical corticosteroids as routine tinea treatment. Steroid use is a major contributor to difficult-to-treat patterns and is strongly discouraged by expert consensus. Wolters Kluwer+2Wolters KluwerSystemic Therapy of Dermatophytosis : Clinical Dermatology ReviewWolters KluwerSystemic Therapy of Dermatophytosis: Practical and... : Clinical Dermatology ReviewPubMedExpert Consensus on The Management of Dermatophytosis in India (ECTODERM India) - PubMed

Address moisture and occlusion during treatment. Keep involved areas dry and free from occlusion, particularly when body lesions extend into intertriginous regions; persistent wetness, tight clothing, and untreated concurrent sites can contribute to persistence or reinfection. accessdata fda+1accessdata fda[PDF] Pathophysiology of dermatophyte infections - accessdata.fda.govWolters KluwerSystemic Therapy of Dermatophytosis : Clinical Dermatology Review

Consider oral therapy for extensive tinea corporis, multiple-site involvement, recurrent or chronic dermatophytosis, or localized disease that remains nonresponsive to topical treatment. Expert consensus supports systemic plus topical therapy for extensive corporis and recalcitrant corporis, while systemic therapy reviews list extensive, recurrent, chronic, and topical-treatment-unresponsive infection as standard indications. Nature+2NatureComparison between the efficacy of terbinafine and itraconazole orally vs. the combination of the two drugs in treating recalcitrant dermatophytosis | Scientific ReportsWolters KluwerSystemic Therapy of Dermatophytosis: Practical and... : Clinical Dermatology ReviewPubMedExpert Consensus on The Management of Dermatophytosis in India (ECTODERM India) - PubMed

Oral terbinafine 250 mg daily for 2-4 weeks is a listed systemic regimen for tinea, with duration based on the indication. Oral itraconazole regimens listed for tinea corporis or cruris include 200 mg twice daily for 1 week or 100 mg daily for 2 weeks. Use these regimens only after reviewing concomitant medications, hepatic risk, and the diagnostic basis for systemic therapy. WHOWHO[PDF] PHC ENG GUIDE 200 - Extranet Systems

If topical therapy fails, oral terbinafine or itraconazole is recommended after oral griseofulvin is considered for extensive infection or hair/nail involvement in the cited HIV-associated skin-condition guidance. In contemporary recalcitrant disease, choose therapy based on culture, organism identification when available, prior exposure, and concern for terbinafine resistance rather than reflexively combining multiple systemic agents. JAMA+2JAMAEffect of Different Itraconazole Dosing Regimens in Adult Patients ...PubMedExpert Consensus on The Management of Dermatophytosis in India (ECTODERM India) - PubMedWHO[PDF] Guidelines on the treatment of skin and oral HIV-associated ... - IRIS

Before initiating oral terbinafine, review for hepatotoxicity history and counsel regarding severe skin reactions, leukopenia, hepatotoxicity, and taste disturbance, all reported adverse effects. Do not infer that a persistent rash represents resistance until adherence, ongoing exposure, topical-steroid use, diagnosis, and mycologic testing have been reassessed. WHO+3WHO[PDF] PHC ENG GUIDE 200 - Extranet SystemsWolters KluwerSystemic Therapy of Dermatophytosis : Clinical Dermatology ReviewWileyMajor challenges and perspectives in the diagnostics and treatment of dermatophyte infections - Gnat - 2020 - Journal of Applied Microbiology - Wiley Online LibraryPubMedExpert Consensus on The Management of Dermatophytosis in India (ECTODERM India) - PubMed

Classify the failure pattern before escalation. Disease that recurs within weeks after treatment completion is recurrent dermatophytosis; chronic dermatophytosis has been described as infection persisting for 6 months to 1 year or longer despite treatment, and recalcitrant disease is failure to achieve clinical cure despite appropriately dosed systemic antifungal therapy. These categories warrant culture and a search for persistent exposures or reservoirs. Wolters Kluwer+2Wolters KluwerSystemic Therapy of Dermatophytosis : Clinical Dermatology ReviewWolters KluwerSystemic Therapy of Dermatophytosis: Practical and... : Clinical Dermatology ReviewPubMedExpert Consensus on The Management of Dermatophytosis in India (ECTODERM India) - PubMed

Ask specifically about interrupted treatment, self-medication, steroid-containing creams, tight or synthetic clothing, obesity-related occlusion, and ongoing contact with affected people or animals. Nonadherence and erratic steroid-combination use are recognized contributors to therapy gaps and difficult-to-treat dermatophytosis; zoonotic and contaminated-surface transmission can perpetuate infection. Nature+3NatureThe dual role of azoles: lifesaving antifungals and drivers of resistanceWolters KluwerTreatment Approach for Superficial... : Clinical Dermatology ReviewWolters KluwerSystemic Therapy of Dermatophytosis : Clinical Dermatology ReviewPubMedA comparison of the existing recommendations for human and veterinary clinicians on the management and prevention of the zoonotic aspects of dermatophytosis: A scoping review - PubMed

Suspect terbinafine-resistant Trichophyton when a culture-confirmed dermatophyte eruption is extensive or persistent after an adequate terbinafine course, particularly with travel, close contacts, or epidemiologic links to emerging resistant strains. T. indotineae has been reported in the United States and is associated with difficult-to-treat, terbinafine-resistant dermatophytosis; species identification and antifungal susceptibility assessment should guide specialist-directed therapy where available. Nature+2NatureThe dual role of azoles: lifesaving antifungals and drivers of resistanceScienceDirectEmergent insights on the spread of antifungal-resistant Trichophyton indotineae dermatophyte: Clonal expansion, adaptability dynamics and human–animal host adaptation - ScienceDirectScienceDirectMulti-drug resistance Trichophyton indotineae in a stray dog - ScienceDirect

Do not use a topical steroid to suppress inflammation while awaiting fungal testing unless a separate inflammatory diagnosis has been established. Steroid exposure can make tinea less recognizable and has been repeatedly implicated in chronic and recalcitrant disease patterns. Wolters Kluwer+2Wolters KluwerSystemic Therapy of Dermatophytosis : Clinical Dermatology ReviewWolters KluwerSystemic Therapy of Dermatophytosis: Practical and... : Clinical Dermatology ReviewPubMedExpert Consensus on The Management of Dermatophytosis in India (ECTODERM India) - PubMed

At completion of therapy, confirm that active scaling and advancing lesions have resolved, then investigate persistent or recurrent lesions rather than automatically restarting the same treatment. In a patient with recurrence, culture active disease and examine for concurrent tinea pedis, nail disease, scalp disease, hand involvement, or other untreated sites that may act as reservoirs. BMJ+2BMJDermatophyte infections - Symptoms, diagnosis and treatment | BMJ Best Practice USWolters KluwerSystemic Therapy of Dermatophytosis: Practical and... : Clinical Dermatology ReviewPubMedExpert Consensus on The Management of Dermatophytosis in India (ECTODERM India) - PubMed

Reduce transmission by keeping involved skin dry and avoiding occlusion. Ask about shared locker rooms, swimming pools, athletic environments, close-contact spread, and pets or other domestic animals with skin lesions; these exposures support reinfection risk and may require environmental or veterinary intervention. accessdata fda+2accessdata fda[PDF] Pathophysiology of dermatophyte infections - accessdata.fda.govNatureThe dual role of azoles: lifesaving antifungals and drivers of resistancePubMedA comparison of the existing recommendations for human and veterinary clinicians on the management and prevention of the zoonotic aspects of dermatophytosis: A scoping review - PubMed

Arrange dermatology or infectious diseases input when disease is extensive, persists after appropriate systemic treatment, requires organism identification or susceptibility testing beyond local laboratory capacity, or raises concern for T. indotineae. The consultation goal is culture-directed treatment and exclusion of nondermatophyte dermatoses, not empiric addition of corticosteroids or multiple antifungals. JAMA+3JAMAEffect of Different Itraconazole Dosing Regimens in Adult Patients ...WileyMajor challenges and perspectives in the diagnostics and treatment of dermatophyte infections - Gnat - 2020 - Journal of Applied Microbiology - Wiley Online LibraryScienceDirectEmergent insights on the spread of antifungal-resistant Trichophyton indotineae dermatophyte: Clonal expansion, adaptability dynamics and human–animal host adaptation - ScienceDirectScienceDirectMulti-drug resistance Trichophyton indotineae in a stray dog - ScienceDirect