Table 2.

Mean counts of total bacteria and four major bacterial groups in fecal samples collected from nine healthy human volunteers over 8 months as determined by FISH

VolunteerMean counts (SD)a
Total bacteria (1011)Bacteroides (1010) with Bfra-BdisC. coccoides-E. rectale (1010) with Erec482Low G+C #2 gram-positive bacteria (1010) with Lowgc2PBifidobacteria (109) with Bif164
DAPIBact338
A2.9 (1.1)2.8 (0.9)4.8 (2.0)7.3 (2.6)2.5 (1.1)8.0 (7.5)
B2.0 (0.6)1.8 (0.6)3.6 (1.4)5.1 (2.8)2.8 (1.2)10.1 (4.8)
C2.5 (0.6)2.4 (0.8)3.2 (1.8)5.9 (3.4)2.1 (1.5)4.0 (2.1)
D3.5 (1.3)3.3 (1.1)3.1 (1.0)12.3 (3.4)4.2 (1.1)5.2 (3.5)
E2.7 (0.7)2.8 (0.9)6.6 (3.4)6.3 (1.8)3.5 (1.4)14.9 (8.1)
F2.3 (0.6)2.4 (0.9)8.2 (4.2)8.1 (3.3)3.9 (1.4)7.9 (3.7)
G3.8 (0.7)3.8 (0.7)11.6 (6.0)11.4 (5.0)3.1 (1.9)6.9 (6.0)
H2.6 (1.9)2.7 (2.2)6.5 (6.0)7.3 (9.9)1.7 (2.1)13.7 (7.2)
I3.4 (1.1)3.5 (1.2)5.6 (2.3)11.1 (3.5)6.2 (2.3)13.8 (10.3)
  • a The mean counts are represented as cells per gram (dry weight) of feces and were calculated with eight samples from each volunteer except volunteer B, for whom the mean was calculated with the 14 samples provided. Total bacterial counts were determined by DAPI staining or with the probe indicated. The counts for the four major bacterial groups were determined by using the indicated probes.