Media and Media selection yogurt

Three media performance and various types of yoghurt bacteria was evaluated. These media are: Skim milk agar (Marshall, 1992), acidic MRS agar (Biokar, Beauvais,France) (IDF, 1988b) a and M17 agar (Biokar, Beauvais, France)
(IDF, 1988b).. The applicability of plating media decimal dilutions yogurt samples. Total Total of 25 samples studied (for each type of produce yogurt each 5). Thus, a sample This is Calcium lactate 1 G is in a sterile dilution water (0.1%), and posted a 0.1 ml aliquot traits Liters of various media dilution in triplicate. Plate 72 hours incubation at 37 ° C in two Different types of conditions: aerobic and anaerobic (GasPak System-Oxoid, buffered lactic acid  Hampshire, UK). S. thermophilus and L. bulgaricus heave Examples of bacterial population is seen as different shape. Bacterial population's identity is recognized as FIL-IDF
Founded by. (IDF, 1988b; 1991).