Identification et caractérisation de la flore d’intérêt technologique des bactéries lactiques du lait de chèvre

Abstract

Lactic acid bacteria have acquired great importance by their presence in the food industry and for a longtime. Isolation of isolates strains from three samples of raw goat's milk from three regions (kheir-Eddine, Achaacha, Sidi Ali) in the wilaya of Mostaganem, allowed us to obtain 20 strains to Gram positive and catalase negative. For identified the isolates, we are use this tests : Growth in the presence of NaCl 6.5%; growth at pH=5, pH= 9.6; growth test different temperatures (20C°, 15C°, 45C°); study of heat resistance; growth test in mid milk Sherman; test hydrolysis of arginine (ADH); test production of acetoin. The results of technological test are satisfactory for industrial use.