TABLE 4.

Bacterial loads determined in the blood of guinea pigs infected intramuscularly with either wild-type Ames or ΔpurH spores

Challenge strain	Challenge dose	Bacterial load (CFU/ml)	No. of animals	% Recovery relative to challenge dose	P
Ames wta	1 × 103	9.2 × 108	3	9.2 × 107	0.02
ΔpurH strain	≥1 × 106	3.4 × 103	3	0.34

^awt, wild type.