Successful mating of a human isolate of Arthroderma simii with a tester strain of A. vanbreuseghemii.

An isolate of Arthroderma simii was successfully mated with a tester strain of A. vanbreuseghemii cultured on the plate of simple agar with some hair on it at 27 °C. Confirmation of sexual reproduction was made by the detection of hybrids of two parental genotypes. The implications of this result are discussed from the viewpoint of a reevaluation of the species boundaries of dermatophytes.