To study probiotic microbes like lactobacillus species were isolated from various milk and curd samples was collected from different places such as vellore , kannamangalam , gudiyatham. Which were subjected to screening and characterized and examined for the presence of probiotic properties of lactobacillus. Lactobacillus is a genus of lactic acid bacteria and It’s a group of regular,non-sporing, gram positive bacteria,rod shaped,non-motile and absence of catalase enzyme. Milk and curd samples is an important culture media for lactobacillus. Analysis for quality of milk and curd samples by mbrt test. To detect various adulterants present in milk by using specific biochemical test. The main aim of this study to isolates were obtained by growing on de man rogosa and sharpe[MRS] Agar medium. Lactobacillus was isolated for the production of silver nanoparticles was monitered by UV-spectroscopic analysis.The peak was observed between 400-450nm indicating this presence. Finally the antibacterial activity of nanoparticles were checked against lactobacillus.
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