Screening and identification of NSLAB in Xinjiang acid camel milk

A total of 20 strains Non Starter Lactic Acid Bacteria (NSLAB) were isolated from home-made fermented camel milk samples of Xinjiang through improved ROGOSA medium. Comprehensive 4 physiological indices including the ability of acidity and the proteolysis, extent of autolysis, the aminopeptidase activity, of NSLAB were used to evaluate the composite score and select evaluation indices in tested high properties NSLAB. By multivariate statistical analysis and composite scores (X-5>X-4>X-15>X-13>X-12>X-7) . The results showed that Δp H (24h) , the extent of autolysis, the aminopeptidase activity, the proteolysis ability of X-5 were 1.08%, 28.26%, 18.88, 3.21U/m L, respectively. The isolates were identified by physiology-biochemistry characteristics and the molecular method of 16 S r DNA and a phylogenetic tree was contructed. X-4, X-5, X-13, X-15 were identified as Lactobacillus plantarum, X-7, X-12 were identified as Lactobacillus fermentum, Pediococcus acidilactici, respectively.