This Publication Is Searchable The Merck Manual of Diagnosis and Therapy Section 10. Dermatologic Disorders Chapter 113. Trichophyton, Epidermophyton, and Microsporum are most commonly involved, but clinical differentiation of dermatophytes is difficult.
Transmission is usually from person to person or animal to person.
Fomites are not usually responsible. Resistant cases or those with widespread involvement require systemic therapy. Newer systemic drugs include itraconazole and fluconazole, oral triazoles, and terbinafine, a second-generation allylamine. Itraconazole interacts with many commonly prescribed drugs. Disturbances of taste occur less frequently, and hematologic and hepatic side effects are rare.