Acetobacter

The Acetobacter is a genus within the family of Acetic Acid Bacteria (AAB) known for being capable of spoiling wine by converting it ultimately into vinegar. They are present on all grapes, but they are more common on grapes that have rot.

Acetobacter can survive only thanks to the presence of oxygen and is also one of the very few groups of bacteria which can live in the high-acid (low pH) environment of wine (together with the lactic acid bacteria).