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Beer Spoliage Organisms
(selected excerpts)Microorganisms causing spoilage during brewing and beer processing are limited to a few genera of bacteria, wild yeasts, and molds. This is because beer is a rather unfavorable growth medium for most beer spoilage microorganisms. The alcohol content, low pH, and the presence of hop constituents are inhibitory, while the lack of nutrients restricts growth of those cells which do survive. Nevertheless, these can interfere with fermentation or have deleterious effects on beer flavor and shelf life.
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