The yeast flora of 16 samples of rumen contents of musk oxen () from East Greenland was examined. Variable numbers of yeast colonies developed on agar plates incubated at 25 °C, the counts being up to 136000 per g (wet wt). Of the 41 strains isolated, the majority belonged to and ; others were species of and Very few colonies appeared on plates incubated at 37 °C, and only one species of was isolated. Samples of rumen contents kept at about 5 °C for about 3 years contained a much greater number of yeasts, up to several million per g (wet wt) being counted on agar plates incubated at 25, 15 and 5 °C. The 30 strains isolated were of only three species of , and none were obligate psychrophils.


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