Studies On Biological Activity And Isolation And Identification Of Lactic Acid Bacteria From Kumiss

27 strains of bacteria in this study were isolated from 8 samples of traditionally home-made kumiss collected from Uighur Shuixi-gou,Ili Zhaosu, Xinjiang and samples of Industrial production kumiss collected from Kazakstan and Kyrgyzstan and their biological properties were studied, among of them 24 strains were lactic acid bacteria. According to the morphological characters,physiological and biochemical reaction and suger fermentation character and amino acid composition of cell wall of bacteria,they were ascribled to 5 genus of Lactobacillus,Enterococcus,Streptococcus,Lactococcus and Leuconostoc, containing with 12 species. 2 strains of Lactobacillus casei,1 strain of Lactobacillus alimentarius,2 strains of Lactobacillus jensenii,2 strains of Lactobacillus acetotolerans,5 strains of Lactobacillus pentosus,2 strains of Lactobacillus delbrueckii,3 strains of Lactobacillus plantarum,1 strain of Lactobacillus zeae,2 strains of Enterococcus faecali,1strain of Streptococcus thermophilus,2 strains of Lactococcus plantarum,1strain of Leuconostoc mesentaroides. The research revealed that Lactobacillus alimentarius was isolated from samples of kumiss from Xinjiang. The bacteria species of kumiss from Kazakstan were dominated by the bacteria colonies of Lactobacillus pentosus.The ability of tolerance to acid and the culture of growth. The results showed that 40℃were the most suitable condition and lactobacillus were resistant to pH4.3~8.5 . The research of the growth carve of strains in 24 hours that slow–moving period were 0h~6h. Logarithm growth period and invariable period were respectivel.