The spoiled foods usually display sensorial changes that can be easily recognized by consumers, thus resulting in significant economic losses due to consumers complaints or product recalls Observable signs of spoilage include product leakage from containers, colour change, emission of unpleasant yeasty odours, emulsion separation ( in mayonnaises, dressings ), turbidity, flocculation or sediment formation ( in wines, beverages ) and visible colonies or brown film development on product surfaces.
