Tinea capitis (ringworm of the scalp) is caused by dermatophytic fungi
Trichophyton tonsurans is the most common species in the US, and does NOT flouresce under Wood's lamp
Griseofulvin (20-25mg/kg/ day orally) is the standard first-line therapy in children older than 2 years, and has a good safety profile
Both tablet and suspension formulations are available, and it should be taken with food that are high in fat to increase drug concentrations
NO laboratory assessment of hepatic enzymes is required during the 8-week therapy course in children who have no history or clinical examination findings concerning for liver disease.
Topical antifungal agents are ineffective because they do not penetrate sufficiently into the hair shaft.
References
2012 PREP Self-Assessment, Pediatrics Review and Education Program
