Foods are excellent sources of nutrients and hence are excellent environments for the growth of microorganisms. Microbial growth is controlled by factors related to the food itself, or intrinsic factors, and also to the environment where the food is being stored, or what are described as extrinsic factors. Food composition is a critical intrinsic factor that influences microbial growth. If a food consists primarily of carbohydrates, spoilage does not result in major odours. Degradation of fats produce short-chained fatty acids, that render fat-based foods rancid and unpleasant (Allen and Hamilton, 1989; Prescott et al., 2002).