SUMMARY
Electron microscope pictures show a single polar flagellum on the spores of Karling's keratinophilic organism. All attempts to isolate and grow it in pure culture on synthetic media were unsuccessful.
What appears to be a different but related species was isolated from soil samples baited with human hair. It is characterized by cylindrical sporangia borne on long, slender stalks. The sporangia contain rod-shaped spores in long filaments. These spores are motile, with a single polar flagellum.