The cultural and proteolytic properties of yeast fungi of the Candida genus were studied. It was found that the natural variability of the morphology of C. albicans colonies depends on the long-term storage of the strains and the amount of replanting. In addition to the typical S and atypical K forms, the R form can also be detected in collector and hospital strains. Negative results for proteolytic activity in the third reseeding for collection strains and in the first reseeding for hospital strains.