Table 1.

Ninety-seven percent OTUs enriched or depleted in IBD subset

Top Blast hit*	Phylum†	ΔPrevalence,‡%
Depleted in IBD subset
Bacterium mpn-isolate group 5	Bacteroidetes; Bacteroidales	−42.3
Bacterium mpn-isolate group 18	Firmicutes; Lachnospiraceae	−37.7
Butyrate-producing bacterium A2–A165	Firmicutes; Lachnospiraceae	−34.0
Butyrate-producing bacterium SR1/1	Firmicutes; Lachnospiraceae	−32.5
Bacteroides thetaiotaomicron	Bacteroidetes; Bacteroidales	−32.5
Butyrate-producing bacterium L2—L7	Firmicutes; Lachnospiraceae	−27.6
Clostridium nexile	Firmicutes; Lachnospiraceae	−26.2
Bacterium mpn-isolate group 19	Firmicutes; Lachnospiraceae	−26.2
Butyrate-producing bacterium SS2/1	Firmicutes; Lachnospiraceae	−24.1
Alistipes sp. WAL 8169	Bacteroidetes; Bacteroidales	−24.0
Enriched in IBD subset
Drinking-water bacterium Y7	Alphaproteobacteria	76.0
Actinobacterium GWS-BW-H99	Actinobacteria	62.5
Nocardioides sp. NS/27	Actinobacteria	61.8
Novosphingobium sp. K39	Alphaproteobacteria	57.8
Pseudomonas straminea	Betaproteobacteria	53.7
Gamma proteobacterium DD103	Gammaproteobacteria	50.9
Bacillus licheniformis	Firmicutes;Bacilli	49.7
Sphingomonas sp. AO1	Alphaproteobacteria	49.6
Actinomyces oxydans	Actinobacteria	48.9
Acidimicrobidae Ellin7143	Actinobacteria	47.6

*Identified by Blast search of database culled of environmental clones.

^†Determined by comparison to rRNA sequence database (49).

^‡Difference in prevalence of an OTU between normal subset and IBD subset.