Example of probiotics includes lactobacillus rhamnosus, which stimulates dendritic cells through the Toll-like receptor 2 (TLR2) pathway hence activating the CD8+ T cells, as well as Eubacterium hallii, which promotes the activation of CD8+ T cells and allows them to easily infiltrate into the tumours [72, 73]. This evidence concerns the gene CD8A and neoplasm.