TABLE 2.

Comparison of the virulence of strains of the B. cepacia complex in a chronic respiratory infection model

Strain	Virulence (CFU/ml/lung)a		% Pathology on day 7 p.i.a
	Day 7 p.i.	Day 21 p.i.
B. cepacia genomovar I
Cep509	8.1 × 105 ± 6.4 × 105	1.2 × 105 ± 1.4 × 105b	43.0 ± 2.0
B. multivorans
C5393	1.3 × 106 ± 1.4 × 106	3.7 × 105 ± 1.5 × 105	13.3 ± 5.9
C1576	1.2 × 105 ± 1.7 × 105	4.5 × 104 ± 4.6 × 104	9.0 ± 4.6
B. cepacia genomovar III
K56-2	1.5 × 106 ± 2.4 × 106e	ND	40.5 ± 4.2e
PC715j	3.5 × 105 ± 3.4 × 105f	ND	22.8 ± 10.8f
J2315	4.6 × 103 ± 7.8 × 103	5.0 × 102c	38.0 ± 21.0
Cep511	2.7 × 105 ± 2.2 × 105	3.3 × 103 ± 5.1 × 103	12.7 ± 1.53
J415	3.1 × 105 ± 5.2 × 105	6.5 × 103 ± 1.2 × 104	13.0 ± 1.73
B. stabilis
LMG 14086	3.3 × 102 ± 2.9 × 102	0	20.0 ± 1.7
LMG 14294	0	0	16.0 ± 5.6
B. vietnamiensis
PC259	1.2 × 104 ± 2.0 × 104	2.0 × 102 ± 1.7 × 102	19.7 ± 0.6
FC441	8.5 × 102 ± 6.6 × 102	7.1 × 103 ± 9.3 × 103d	29.0 ± 1.0

^aValues are means ± standard deviations for three animals unless noted otherwise. ND, not determine

^bValues are mean ± standard deviation for four animals.

^cValues are for one animal (one animal died on day 1 p.i., and one animal died on day 2 p.i.).

^dValues are mean ± standard deviation for five animals.

^eData previously reported by Sokol et al. (32).

^fValues are means ± standard deviations for eight animals in the experiment previously described by Sokol et al. (32).