Among food products probiotic bacteria is distributed in a variety of products including fermented milks, ice cream, various types of cheese, baby-food milk powder, frozen dairy desserts, whey-based beverages, sour cream, butter milk, normal and flavored milk, and concentrated milk. Currently, yogurt is the major probiotic which is sold to consumers. Mortavasian et al. attempted to characterize the probiotic microorganisms used in food products exploring the most common, bifidobacteria and lactic acid bacteria. Lactobacillus and Bifidobacterium are the probiotic organisms which are the normal constituents of the human intestinal microbiota
