Table 1. Microbiota changes during or contributing to gut inflammation.

Crohn’s disease	↓Firmicutes ↑Proteobacteria (AIEC) Loss of F. prausnitzii
Salmonella/Citrobacter infection	↓Firmicutes ↑Proteobacteria (Salmonella/Citrobacter)
TRUC mice	↑Proteobacteria – Klebsiella, Proteus
B6.L-10R2−/−.TGFßRIIDN	↑Enterobactriaceae but Bacteroides → colitis
129.IL-10−/−	E. coli, E. faecalis → colitis
C3H/HeJBir	Clostridia/Lachnospiraceae
Normal C57Bl/6	Enterotoxigenic B. fragilis