INTRODUCTIONNowadays, manufacture of yoghurt containing probioticmicroorganisms is a common and popular issue with acommercial significance and many products of this kind areavailable in markets of different countries (Mohammadiand Mortazavian 2011). Worldwide, the increased awarenessof the consumers regarding the effect of food on health hascaused an increasing trend for consumption of probioticproducts (Granato et al. 2010). “Probiotics” can be definedas live microorganisms (bacteria and/or yeasts) that canbring health benefits to human or animal bodies, usually the