An expert in wine production: A fermentologist knows how to turn grapes into wine by changing certain food components; such as, carbohydrates into natural preservatives by the action of yeasts, fungi, or bacteria.

Louis Pasteur, the great French microbiologist, and fermentologist, devised a method of heating liquids to temperatures that destroy harmful micro-organisms and his work in the 1860's concentrated on wines and beers, where spoilage was causing great economic losses for producers.