Abstract
2 young female guineapigs kept as pets died consecutively with signs of enteritis. Yeasts were isolated in large quantity from their small intestines, In the 2nd animal the yeast strain, isolated from the gut and other organs, was identified as Torulopsis pintolopesii. Thus, this normal inhabitant of the gut may be characterized as an opportunistic pathogen in guineapigs, like T. glabrata in man. A change in diet and social group were the only identifiable events which might have played the role of precipitating factor.