In the group of normal weight CRC patients, c__Betaproteobacteria.o__Neisseriales, o__Neisseriales.f__Neisseriaceae, f__Neisseriaceae.g__Eikenella was significantly positively correlated with NK cells activated were significantly positively correlated, and g__Prevotella.s__Prevotella_timonensis was significantly positively correlated with T cells CD4 memory resting (Fig. 4B, D). Here, CD4 is linked to colorectal carcinoma.