Although probiotics have been isolated from different sources, few were isolated from traditional Chinese medicine. The current study firstly isolates Pulsatilla Radix-utilising Pediococcus pentosaceus PR-1 from human faeces. Subsequently, the tolerance of PR-1 to low pH, bile salts, simulated gastric juice and succus entericus, antioxidant activity, antimicrobial activity, cholesterol assimilation and antibiotics susceptibility were investigated. After 2 h of incubation at pH 2.0, over 80% of PR-1 survived. The cell viability of PR-1 at 2 h under 0.1% bile salt condition was 99.2%. The survival rate of PR-1 in gastric juice and succus entericus was 64.48% and 81.86%, respectively. Cell-free supernatant of PR-1 culture also showed antimicrobial activity against Escherichia coli, Staphylococcus aureus and Salmonella typhimurium. Besides, antioxidant activity of PR-1 CFS was significantly greater than cell pellet. PR-1 was shown to be resistant to kanamycin, streptomycin, vancomycin and norfloxacin and was able to lower the cholesterol level to 72.5±1.5%. In addition, PR-1 displayed γ-haemolysis and was non-pathogenic.
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