Lactic acid bacteria (LAB) are the most commonly used microorganisms used in food preservation techniques such as fermentation. Lactic acid produced by LAB is a useful compound for food
preservation because it maintains the acidic conditions of the fermented products, and is lethal to bacteria that cause food spoilage
and food poisoning (Kobayashi et al., 2004). Most fermented foods
owe their origin to the fact that the processes used in their
production are inhibitory to many microorganisms. As a result,
fermented products generally have a longer shelf life than their
original substrate and their ultimate spoilage is different in character (Adams & Mitchell, 2002). Past experience has shown that
sometimes fermented foods have been attributed to food-borne
illnesses (Nout, 1994), particularly the application of fermentation
at the household level (Nout & Motarjemi, 1997). The inhibitory
effect of lactic acid depends on the species and loads of pathogenic
bacteria, sanitation processes as well as the number of LAB in fermented foods