Abstract
The fluorescent antibody technique was applied to detect possible immunological difference between the two species, Trichophyton asteroides and T. interdigitale. The anti-T. asteroides antibody and the anti-T. interdigitale antibody were labeled with fluorescein isothiocyanate, and the fungal smears made with strains belonging to each species were stained with either one of the prepared conjugates. From the results of the staining and of the agar gel precipitation test using each of the unconjugated antibodies, it was concluded that there was no immunologically essential difference between T. asteroides and T. interdigitale.