Interestingly, post infection, the abundance of Firmicutes was found decreased in Fut8+/+ (66.37% vs. 54.28% before and post infection) and Fut8+/– mice (70.68% vs. 53.78%), in contrast to the elevation of Bacteroides abundance in Fut8+/+ (24.37% vs. 36.75%) and Fut8+/– mice (23.23% vs. 34.38%) (Supplementary Figures S3A,B). The gene discussed is FUT8; the disease is infection.