What Is An Infection?Infection refers to the introduction or presence of undesirable microorganisms in beer or raw materials, When these undesirable microorganisms are made into beer and start to compete for sugar with cultured yeast, infection will occur. Bacteria or undesirable microorganisms in w

The most important ester found in beer is isoamyl acetate, which has a flavor like rubber or pear blossom. Isoamyl acetate is considered an ester, or a mixture of alcohol and acid. Because fermentation (yeast converting sugar into alcohol) produces isoamyl acetate, isoamyl acetate is a very common o