Abstract
In my previous report and Amemiya's report, the antigenic structures of several species of the genus Hansenula were indicated through antigen analyses. The standard strains used for antigen analyses were authentic, but the antigenic structure of one species was derived from the single strain. Therefore, fifty stock cultures other than the standard strains were collected for my comparative study. Biological characteristics of the stock cultures were examined again by the usual method, and then an existence of antigens of every strain was examined by the slide agglutination method with monospecific or absorbed antisera based on the antigenic structures of the genera Candida and Hansenula. Both identifications correspond each other. Consequently, the antigenic structures, will be serve as the reliable basis of the classification of the genus Hansenula.