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Tinea Capitis — SCE Dermatology MCQ

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HardCutaneous InfectionTinea CapitisSCE Dermatology

A child has inflammatory tinea capitis. Culture identifies Microsporum canis and there is no hepatic contraindication. Which systemic treatment is preferred on organism-specific efficacy grounds?

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Correct answer: CUse oral griseofulvin and an adjunctive sporicidal shampoo to reduce transmission

C is correct. Tinea capitis requires systemic treatment because topical agents do not penetrate the infected hair shaft adequately. Terbinafine is highly effective for Trichophyton, which causes most UK cases, but griseofulvin generally performs better for Microsporum species including M. canis. A shampoo such as selenium sulfide or ketoconazole is adjunctive to reduce spore carriage and transmission, not curative monotherapy. A kerion is an inflammatory fungal response; antibiotics are added only when bacterial superinfection is clinically supported. Household and animal sources should also be assessed.

Reference: British Association of Dermatologists guideline for tinea capitis: https://doi.org/10.1111/bjd.13196