Evaluation of industrial yeasts for pathogenicity.

Eleven yeasts representative of species of industrial interest were compared with Candida albicans for their potential pathogenicity for untreated and cortisone-treated mice. Only C. tropicalis produced a progressive infection similar to that produced by C. albicans. Candida lipolytica, Torulopsis spp., and Hansenula polymorpha were not recovered from mice 6 days after inoculation. Kluyveromyces fragilis, C. pseudotropicalis, C. utilis, C. guilliermondii and C. maltosa were recovered from mice but did not produce evidence of infection.