IL17A and neoplasm: However, Herbaspirillum and Sphingomonadaceae are examples of commensal microbiota that promote inflammation and tumor cell proliferation by stimulating Myd88‐dependent IL‐1β and IL‐23 production from myeloid cells, inducing proliferation and activation of Vγ6Vδ1 γδ T cell, producing proinflammatory cytokine IL‐17A through cell expression of transcription factor RORγt, and recruiting neutrophils.307