onsidering the amount of daily consumed foods which are produced by means of fermentation, such as breads, wines, beers, cheeses, fermented vegetables/fruits and sausages, the economical importance of these biotechnological processes can be hardly overestimated. Lactic acid bacteria (LAB) play an essential role in many of these fermentation's. In order to better control and improve the fermentation processes, very considerable financial means and effort have been invested by govemments and industries in research on this group of bacteria. Zie: Summar