Acetobacter aceti

Acetobater aceti is a gram negative bacterium capable of converting alcohol into acetic acid as porven by Louis Paster in 1864. The aerobic rod shaped bacterium grows in temperatures around 30 C and found in any alcoholic niches such as flowers, soil and water. The bacterium is motile by peritrichous flagella, a tale like projection attached to the cell body.

Acetobacter aceti are not able to ferment and nor do they form endospores. They are classed as bio hazard level 1 as they do not cause any harm to humans.

However they are widely used in industrial fermentation facilities, commonly used to acidify beer and responsible for the off flavouring in beer. The bacteria is also frequently used to produce vinegar by converting the ethanol in wine into acetic acid.