Probiotics are bacterial cultures or living microorganisms which, upon ingestion in certain numbers exert health benefits beyond inherent general nutrition and support a good and healthy intestinal bacterial flora [5]. Hence, they are viable bacteria that beneficially affect the host by improving its intestinal microbial balance .These bacteria have to belong to the natural flora in order to be able to resist acid and bile, to survive during intestinal transit, to adhere to the intestinal mucosa, and to produce antimicrobial substances in order to retain the characteristics that contribute to their beneficial health effects [6].