Transplant of bacteria from the gut of KRAS, p53, cyclic recombinase (KPC) mutated mice into antibiotic-treated mice of a slowly progressive KRAS, cyclic recombinase (KC) pancreatic cancer model accelerates tumor growth, but microbial ablation leads to decreased infiltration of MDSCs and reduces disease progression [7]. The gene discussed is KRAS; the disease is pancreatic neoplasm.