TNF and inflammatory bowel disease: The changes in specific bacteria taxa were reported to be associated with the success of anti-TNF therapy in IBD, such as increased relative abundances of Bifidobacterium, Collinsella, Lachnospiraceae, and Roseburia (Rajca et al., 2014; Magnusson et al., 2016; Wang et al., 2018; Yilmaz et al., 2019).