Acetic Acid Bacteria (AAB) are a group of bacteria that convert ethanol into acetic acid through a process called fermentation. They are commonly found in environments where alcohol is present, such as in vinegar production and the fermentation of various foods. AAB play a crucial role in the food industry, contributing to the flavor and preservation of products. These bacteria are typically aerobic, meaning they require oxygen to thrive. Some well-known species include Acetobacter and Gluconobacter. AAB are also important in the production of certain beverages, such as kombucha and sour beer, where they help develop unique flavors and aromas.