Trichophyton tonsurans: a follow-up of treated and untreated cases.

Tinea capitis caused by Trichophyton tonsurans is becoming increasingly prevalent1and in some areas, such as Texas, the incidence is of major significance.2Although numerous cases of Trichophyton tonsurans infection have been reported, additional information in regard to the natural course of the disease, age, and sex incidence, spontaneous cure rate and results of treatment appears to be needed. At the annual meeting of the American Medical Association, held in San Francisco in June, 1950, we reported 20 cases of Trichophyton tonsurans through the medium of a scientific exhibit entitled "Ringworm of the Scalp Caused by Trichophyton sulfureum and Trichophyton crateriforme." During the last 11 years we have had the opportunity to observe these 20 cases and 81 additional ones for at least one year and thought it might be of interest to record our experience and observations. Age and Sex Incidence In this series of 101 private