Study on the biological characteristics of Lactobacillus gasseri with antagonistic activity against Helicobacter pylori and application in the yoghurt produce

The aim of present study was to discuss the application and biological characteristics of L.gasseri Chen with antagonistic activity against H. pylori. Biological characteristics research of L. gasseri Chen showed that the logarithmic time was from 8th hour to 26 th hour.The optimum growth p H 5⁷.The optimum growth temperature was30 ³7 ℃.The optimum inoculated concentration was 0.5% ²% ( V / V) , and the tolerance level of bile salt was 0.1% ( V/V) .L.gasseri Chen could grow and ferment in the milk with glucose and the fermented milk could store stably in the 4 ℃ for 21 days.L.gasseri Chen also could ferment in milk with commercial starters without bad affects, which indicated that L.gasseri Chen could be used to produce functional yoghurt.