Table 3.

Variations in fecal flora populations within each volunteer (CVlong) and between volunteers (CVinter)

Population and stain or probeCountaCVtotalaCVlongbCVinterc
MeanSD
Total bacteria
 DAPI2.8 × 1011 1.1 × 1011 0.400.160.30
 Bact3382.8 × 1011 1.2 × 1011 0.430.270.33
Bacteroides/Bfra602-Bdis6565.7 × 1010 4.2 × 1010 0.730.450.62
C. coccoides-E. rectale/Erec4828.1 × 1010 4.8 × 1010 0.600.390.50
Low G+C #2 gram-positive bacteria/Lowgc2P3.3 × 1010 2.0 × 1010 0.610.440.56
Bifidobacteria/Bif1649.4 × 109 6.9 × 109 0.740.590.63
  • a Means, standard deviations, and CVtotal values were calculated with all of the 78 fecal samples analyzed. CVtotal includes the assay error. Counts are represented as cells per gram (dry weight) of feces.

  • b CVlong values were calculated from the coefficient of variations for each volunteer over time, corrected for the assay error.

  • c CVinter values were calculated from the coefficients of variation between the volunteers for each month, corrected for the assay error.