Nail plate susceptibility to Scopulariopsis brevicaulis infection. Experimental Scopulariopsis brevicaulis infection of toe and finger nails collected from 79 persons of both sexes and at various age is presented. Crumbled nail fragments were incubated with a S. brevicaulis strain isolated from toenail acauliosis. The culture was inspected and evaluated under light microscope after seven days of incubation. Hyphe intensively penetrating nail fragments were found in 67.1% of toenails and 38% of fingernails. The infection was most intensive in the nails collected from males and elderly persons.