TABLE 1.

Growth parameters obtained for H. pylori cultures in liquid medium supplemented with FCS or CE

H. pylori strain	Supplement	Growth parameters		P value at the following sampling times (h)b
		Generation time (h)	Final biomass (CFU/ml)a	24 h	48 h	72 h	96 h	120 h
NCTC 11638	FCS	3.3	9.3 ± 0.2c	NS	NS	NS	NS	NS
	CE	3.5	9.0 ± 0.2
AHP2	FCS	4.62	9.8 ± 1.13	NS	NS	NS	NS	NS
	CE	4.62	10.1 ± 1.16
VHP181	FCS	3.6	8.56 ± 0.1	0.01	0.03	0.002	0.019	0.005
	CE	3.46	9.14 ± 0.14
VHP324	FCS	3.15	9.16 ± 0.6	NS	NS	NS	NS	NS
	CE	3.01	9.43 ± 0.15
VHP346	FCS	4.3	8.26 ± 0.15	0.03	0.01	0.07	0.005	0.0009
	CE	2.77	9.83 ± 0.24
VHP529	FCS	3.3	9.21 ± 0.2	NS	NS	NS	NS	NS
	CE	3.46	9.06 ± 0.14
VHP530	FCS	4.3	9.7 ± 0.2	NS	0.09	0.02	0.06	NS
	CE	2.8	10.5 ± 0.81
VHP571	FCS	4.3	9.65 ± 0.25	NS	NS	NS	0.054	NS
	CE	2.39	10.5 ± 0.9
VHP590	FCS	4.7	9.3 ± 0.3	NS	0.01	NS	NS	NS
	CE	3.1	9.7 ± 0.25

^aObtained on day 5.

^bP values of <0.05 indicate significant differences. P values between 0.05 and <0.1 were defined as marginally significant. NS, not significant.

^cStandard error.