TABLE 3.

Comparative S. aureus densities^a

Source of culture and time (h) cultured	Log10 CFU/g of tissue ± SD (n = 9) for indicated strain
	ISP479C	ISP479R
Vegetation
48	0.57 ± 0.50	8.12 ± 0.72
96	0.52 ± 0.11	7.70 ± 1.42
Kidney
48	0.41 ± 0.19	5.34 ± 0.54
96	0.91 ± 0.17	5.60 ± 0.84
Spleen
48	0.28 ± 0.04	5.33 ± 0.25
96	0.80 ± 0.60	4.60 ± 2.44

^aAnimals were infected simultaneously with a 95% infective dose of inoculum for each strain (∼3 × 10⁶ CFU). P was <0.0001 for all comparisons.