CD8A and neoplasm: In contrast, circulating numbers of gut-derived CD8+IFNγ+ T cells induced by a mixture of 11 gut bacterial species belonging to 8 genera (Bacteroides, Parabacteroides, Alistipes, Paraprevotella, Eubacterim, Ruminococcaceae, Phascolarctobacterium, and Fusobacterium) had enhanced anti-tumor immunity against subcutaneous engraftment of MC38 adenocarcinoma cell and anti-microbial immunity against oral Listeria monocytogenes challenge [98].