Food decomposition is a metabolic process which may causesome undesirable organoleptic changes in food, even thoughdecomposed food is not a cause of food borne illness, the changes inits appearance, taste or consistency are matters that affect the retailvalue of the food. Various microorganisms are responsible for thedecomposition of food products which may induce food poisoningas well [1].L. monocytogenes and E. coli O157:H7 are considered as twomajor food-borne pathogens. Although Listeria can spread via directcontact or congenital routes, the use of food is nonetheless consid-ered to be the primary route of infection. This microorganism cansurvive at 2–4◦C and also in frozen foods [2]. Due to thehigh mor-tality rates for cases of severe food poisoning and its psychrophiliccharacterization [3], Listeria is considered as an important food-borne pathogen during the last decade [4]. As a case to verify this,the Canadian listeriosis outbreak was a widespread outburst of thefood infection in which twenty people died out of 56 total con-firmed cases [5].E. coli O157: H7 is also discussed as an important fecal bacteriumwhich may spread through direct contact and consumption of con-taminated food and can survive at 15% concentration of acetic