A technique is described for collecting specimens of hairs and scales from animals by means of a brush to help in the diagnosis of fungus diseases. The brush is then used to implant such materials on special culture media for the growth and identification of fungus organisms. This method offers a better chance to find fungus organisms than the previous method of plucking, which was like looking for a needle in a haystack. The special media makes possible the rapid diagnosis of the presence of pathogenic fungi.