Table 1.

Compositions of major bacterial populations in the gut model determined using FISH probes at a system retention time of 60 h

Population	% of total DAPI counta
	Vessel 1	Vessel 2	Vessel 3
Total eubacteria	95.6 ± 1.0	87.8 ± 0.6	77.8 ± 1.5
Bifidobacteria	7.1 ± 0.5	2.0 ± 0.3	0.9 ± 0.1
Bacteroides-Prevotella	10.7 ± 0.3	5.8 ± 0.2	3.9 ± 0.2
F. prausnitzii	8.0 ± 0.3	6.4 ± 0.2	4.4 ± 0.2
Ruminococcus spp.	0.7 ± 0.3	0.6 ± 0.1	NDb
E. cylindroides	0.1 ± 0.0	0.2 ± 0.4	—c
Lactic acid bacteria	6.4 ± 0.4	5.1 ± 0.3	1.7 ± 0.1
Atopobium cluster	5.5 ± 0.5	4.5 ± 0.2	4.8 ± 0.2
Enterobacteriaceae	0.4 ± 0.1	0.2 ± 0.0	0.2 ± 0.0
Segmented filamentous bacteria	2.2 ± 0.6	4.6 ± 0.1	4.9 ± 0.2
E. rectale-C. coccoides group	16.5 ± 1.2	10.2 ± 0.5	6.5 ± 0.2
R. intestinalis	1.6 ± 0.1	0.8 ± 0.2	0.5 ± 0.1

^aThe results are means of three separate measurements ± standard errors of the mean.

^bND, not detected.

^c−, bacteria were detectable, but at levels of <0.01% of the total DAPI count.