Table 1.

Description of mucosal microbiota changes found in treatment-naive Crohn’s disease [65,66]. Several bacterial taxa are increased or decreased compared to non-IBD controls. * Changes in Faecalibacterium were inconsistent across studies, with one study reporting an increase and the other a decrease.

Crohn’s Disease
Increased	Decreased
Enterobacteriaceae	Bacteroidales
Pasteurellaceae	Clostridiales
Fusobacteriaceae	Erysipelotrichaceae
Neisseriaceae	Bifidobacteriaceae
Veillonellaceae	Coriobacteriaceae
Gemellaceae	Faecalibacterium *
Faecalibacterium