SEROLOGICAL CLASSIFICATION OF THE GENUS SACCHAROMYCES (II)

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Antigenic analyses of seven species of the genus Saccharomyces were carried out by the slide agglutination methods, using monospecific and absorbed antisera prepared mainly with the antigens of the genus Candida. Saccharomyces species showed serological cross reactions with most of the species of the genus Candida. Furthermore, the antigenic structures of every species tested were confirmed by reciprocal absorptions and slide agglutination tests.
Saccharomyces oviformis possesses thermostable antigen 1, 2, 3, 10, 14, 18, 31 and no thermolabile antigen, and Saccharomyces steineri has thermolabile antigen e in addition to all of the antigens of Saccharomyces oviforanis. The antigenic structures of the two species are closely related to Saccharomyces cerevisiae and Candida robusta, and the antigenic structure of Saccharomyces oviformis is identical to that of Saccharomyces uvarurn.
Both Saccharomyces rouxii and Saccharomyces carlsbergensis possess thermostable antigens 1, 8, 10, 28, 32 and no thermolabile antigen. Saccharomyces mellis contains thermostable antigen 31 besides all of the antigens of the two species. They are closely related to Saccharomyces fragilis and Candida pseudotropicalis.
Saccharomyces chevaliers has thermostable antigens 1, 2, 3, 8, 10, 14, 18 and 31 but no thermolabile antigen. Saccharomyces italicus is different from the former only by the possession of antigen 28. The two species are related antigenically, in part, to Candida pseudotropicalis and partly to Candida robusta.