The word bacterium means from a Greek term that means "cane." It is a single-cell prokaryotic microorganism that can cause disease, fermentation or rot in living beings or organic matter.

They are prokaryotic cells, lack nucleus or internal organelles.

Lactic bacteria are those that produce lactic acid from sugars due to their exclusively fermentative metabolism.

The number of lactic bacteria during alcoholic fermentation is usually very low, at most 102 per mL.

Alcoholic fermentation is produced by the action of yeasts, in some cases native and in other additives, they are used in a process that increases the temperature of the must producing carbonic gas and consuming oxygen in the chemical reaction that takes place