The presence of the yeast Dekkera bruxellensis is sometimes attributed to a decline in the industrial productivity of ethanol since it has a more limited fermentation capacity than Saccharomyces cerevisiae. Although its adaptability to the industrial environment has been noted, so far, there has been no evidence to determine the source of this contamination. In this study, we provide evidence to show that D. bruxellensis comes from the fields together with the harvested cane and is then accumulated and recirculated. It might be possible to prevent the accumulation of this yeast by carrying out sanitation controls during the harvesting season.
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