TABLE 1.

B. subtilis counts in feces from outbred mice orally inoculated with 1.75 × 10¹¹ spores in experiment 1

Time (h)	Countsa in mouse:
	1		2		3		4		5
	VC + SP	SP	VC + SP	SP	VC + SP	SP	VC + SP	SP	VC + SP	SP
0	0	0	0	0	0	0	0	0	0	0
3	0	3.0 × 102	0	0	4.5 × 103	4.5 × 103	0	1.3 × 103	6.1 × 102	3.1 × 102
6	3.8 × 106	5.8 × 108	1.1 × 106	3.6 × 105	7.2 × 105	4.2 × 109	1.1 × 108	4.0 × 109	1.2 × 106	4.6 × 109
9	3.9 × 107	6.0 × 1010	3.0 × 107	8.3 × 1010	1.2 × 107	1.3 × 109	1.0 × 109	1.5 × 1010	4.3 × 107	4.0 × 1010
12	9.3 × 107	6.5 × 1010	1.5 × 107	4.2 × 109	9.0 × 107	3.9 × 108	1.9 × 107	6.0 × 1011	3.3 × 107	4.2 × 1011
24	1.1 × 109	9.4 × 103	5.0 × 104	1.4 × 108	1.0 × 107	6.9 × 109	1.3 × 105	9.3 × 109	5.3 × 104	7.4 × 109
48	3.9 × 105	1.7 × 105	6.8 × 105	2.3 × 104	9.5 × 107	3.7 × 1010	1.8 × 105	2.6 × 105	1.3 × 105	3.1 × 105
72	6.7 × 105	3.3 × 104	0	0	2.4 × 105	7.0 × 105	3.8 × 105	2.3 × 1
05	6.0 × 104	1.0 × 105
96	8.7 × 102	1.3 × 103	0	0	1.4 × 103	1.7 × 103	0	0	0	7.2 × 102
Total	1.24 × 109	1.26 × 1011	4.68 × 107	8.73 × 1010	2.08 × 108	4.98 × 1010	1.13 × 109	6.28 × 1011	7.74 × 107	4.72 × 1011
Ratio relative to inoculum	0.0071	0.72	0.00027	0.50	0.0012	0.28	0.0065	3.59	0.00044	2.70

^aCounts of B. subtilis SC1712 obtained from fecal collection experiments. VC + SP, number of vegetative cells plus number of spores in total sample collected; SP, number of spores in sample collected. In the same experiment, feces from control groups of four mice were examined at the same time points, and no counts for B. subtilis SC1712 (VC + SP or SP) were detected (data not shown for control groups).