According to literatures, there are two major pathways of lactic
acid production occurring within lactic acid bacteria: homofer-mentation and heterofermentation. Fermentation products of
homofermentation are exclusively lactic acid, while heterofermen-tation was with equimolar amounts of CO
2
, lactate and acetate or
ethanol except bifidobacteria (Kandler, 1983). Bifidobacteria was