TABLE 3.

Counts of Bacillus spore formers in human fecesa

Subject no.CFU/g feces for:
Infant Adult Elderly
MaleFemaleMaleFemaleMaleFemale
16.88 × 103 6.80 × 103 8.10 × 103 3.05 × 103 4.50 × 104 1.92 × 104
28.6 × 104 9.70 × 104 6.20 × 104 9.60 × 104 5.35 × 103 1.50 × 104
32.34 × 105 2.30 × 103 1.92 × 105 1.53 × 108 2.60 × 104 8.60 × 103
44.30 × 105 2.70 × 104 2.51 × 105 2.00 × 104 2.30 × 104 1.40 × 104
55.00 × 103 2.00 × 104 6.30 × 104 3.80 × 104 1.67 × 104 1.40 × 104
Avg7.50 × 104 3.48 × 104 1.15 × 105 1.54 × 108 2.32 × 104 1.41 × 104
  • a Infant, <10 yr; adult, 20 to 60 yr; elderly, >60 yr. Colonies were grown aerobically, and all tested positive for catalase and were found to contain phase-bright spores after 3 days of incubation at 37°C.