Beer And Wine Exam 2 Practice

Microbial contamination is a common source of off-flavors, often showing up as sour, funky, or solvent-like notes. Bacteria such as lactic acid bacteria and wild yeasts like Brettanomyces can infiltrate a batch and produce lactic acid and other compounds that give a sour or barnyard character, while metabolic byproducts can also create solvent-like aromas. Because these flavors arise from organisms growing in the beverage, the best defense is preventing their entry and growth in the first place and limiting the time they have to affect the product. Thorough sanitation and proper cleaning of all equipment, gear, and packaging, careful handling to avoid contamination, and good storage practices are key. Consuming the product within a reasonable timeframe helps minimize the window for any potential microbial activity to alter flavors.