Salmonellosis is the most reported zoonotic disease in European countries. Salmonellosis (Salmonella gastroenteritis) results from the ingestion of foods that contain significant numbers of viable cells of Salmonella. It is the most frequently occurring food borne infection. Salmonella are small gram negative, motile, non-spore forming rods that ferment glucose, usually with gas, but usually do not ferment lactose or sucrose. They are widely distributed in nature, with humans and animals being their primary reservoir. Generally large number of salmonellae typically 106 to 109 bacterium must be ingested to cause illness.