Table 1.

Doubling times for H. pylori SS1 or its isogenic Che⁻ (ΔCheY) mutant early after infection^a

Infection category and strain	Doubling time (h)
	Corpus	Transition zone	Antrum
Single
WT	6.46	7.87	3.00
ΔCheY	5.47	57.29	5.20
Competition
WT	5.28	49.49	10.55
ΔCheY	4.63	No growth	No growth

^aDoubling time = (22 h)/[(log CFU/gram^{36 h} − log CFU/gram^{14 h})/log₂]. Data are also shown in Fig. 3A.