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SUMMARY: From the caeca of 252 adult bovines 131 yeast strains were isolated, distributed as shown (in brackets) among the following species: Saccharomyces cerevisiae (12), S. chevalieri (3), S. drosophilarum (3), S.fragilis (1), Pichia bovis (1), P. membranaefaciens (3), P. fermentans (3), Cryptococcus diffluens (1), Torulopsis glabrata (4), Torulopsis sp. (2), Candida tropicalis (45), C. parapsilosis (3), C. krusei (33), C. macedoniensis (1), C. utilis (1), C. bovina (1), Trichosporon cutaneum (5). Candida albicans was not isolated. The apparent absence of C. albicans from the bovine intestinal tract may explain the rareness of oral and intestinal moniliasis in bovines. Infection in certain forms of yeast mastitis (caused neither by C. albicans nor by Cryptococcus neoformans) may be derived from the intestinal tract.
Descriptions and Latin diagnoses of Pichia bovis n.sp. and Candida bovina n.sp. are given.
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