A number of yeast strains, isolated from sugar cane mills and identified as strains of Kluyveromyces
marxianus var. marxianus, were examined for their ability to ferment glucose and cane syrup to ethanol at high
temperatures. Several strains were capable of rapid fermentation at temperatures up to 47°C. At 43°C, >6%
(wt/vol) ethanol was produced after 12 to 14 h of fermentation, concurrent with retention of high cell viability
(>80%).