Table 2.

Growth data for O. tsutsugamushi strains

Strain	Estimated doubling time (h)	Log of bacterial load (95% CI)		P
		day 7	day 10
Karp	15.05	5.193 (4.791–5.595)	5.142 (4.907–5.377)	0.6639
Kato	19.85	5.593 (5.363–5.824)	5.847 (5.732–5.961)	0.0134a
Gilliam	12.03	5.537 (4.999–6.077)	5.887 (5.775–5.999)	0.0524
AFC-3	9.50	6.363 (5.650–7.076)	6.182 (5.857–6.508)	0.3782
AFSC-4	10.53	6.221 (6.000–6.442)	6.227 (6.050–6.404)	0.9334
TA763	13.89	5.367 (5.160–5.897)	5.590 (4.876–6.303)	0.6629
UT76	14.42	5.444 (5.354–5.535)	5.935 (5.113–6.756)	0.1223

^aStatistically significant (P < 0.05).