It has good gastrointestinal tolerance and intestinal adhesion ability, can reach the intestine smoothly and adhere to intestinal epithelial cells, exerting a probiotic effect. Animal experiments show that strain WKB148 can effectively inhibit pathogenic bacteria such as Shigella flexneri and significantly increase the content of short-chain fatty acids and the relative abundance of beneficial intestinal bacteria in mouse feces.

It has high ability to resist gastrointestinal stress and has obvious inhibitory effect on opportunistic pathogenic bacteria Escherichia coli, Salmonella and Staphylococcus aureus. Animal experiments have shown that LA85 can not only relieve diarrhea symptoms and colon damage in colitis mice, but also improve immune organ damage in immunocompromised mice and has immunomodulatory functions. At the same time, LA85 can also improve intestinal flora disorders caused by diarrhea and low immunity.

It can inhibit the growth of Listeria monocytogenes. In vitro experiments have shown that CCFM7902 has a protective effect on intestinal epithelial cell strain HT 29 cells infected by Listeria monocytogenes. In vivo experiments demonstrate that CCFM7902 has a protective effect against acute infection with Listeria monocytogenes in mice.

It can inhibit the growth of enter-invasive Escherichia coli (EIEC), inhibit the adhesion and invasion of EIEC to intestinal epithelial cell line HT 29 cells, and effectively relieve diarrhea.