TABLE 1.

Enumeration of B. subtilis spores in liquid samples. CFU assay data are shown as averages ± standard deviation (n = 9). Each sample was tested in triplicate. The ratio between the number of spores and the total cell counts is shown and expressed as a percentage.

g regime	Total cells count (CFU mL–1)	Spore count (CFU mL–1)	Spores/total cells (%)
μg	2.4 ± 0.5 × 107	2.5 ± 0.2 × 106	10.5 ± 1.2
Mars g	2.0 ± 0.2 × 107	1.8 ± 0.5 × 106	8.5 ± 1.5
Flight 1-g	2.5 ± 0.3 × 107	1.7 ± 0.4 × 106	6.9 ± 1.8
True 1-g	2.5 ± 0.8 × 107	2.0 ± 0.6 × 106	8.0 ± 2.1