015) recently surveyed the AS gut microbiome via 16S rRNA sequencing using terminal ileal biopsies fromFrontiers in Microbiology | www.frontiersin.orgJuly 2016 | Volume 7 | ArticleForbes et al.The Gut Microbiota in Immune-Mediated Inflammatory Diseases9 AS patients and 9 controls. The terminal ileum of AS showed an enrichment of Lachnospiraceae, Ruminococcaceae, Rikenellaceae, Porphyromonadaceae,