Table 2.

 Prevalence of H pylori colonisation in gerbils evaluated with different methods

	Wild-type			cagG mutants				virD4 mutants
	4W (n = 8)	12W (n = 8)	24W (n = 8)	4W (n = 8)		12W (n = 8)	24W (n = 9)	4W (n = 8)	12W (n = 8)	24W (n = 9)
Culture (pyloric)	88%	100%	88%	0%	75%		11%	25%	88%	100%
Serology	75%	100%	100%	13%	0%		22%	100%	100%	100%
Histology (pyloric)	100%	100%	100%	38%	88%		100%	100%	75%	100%
Histology (fundic)	100%	100%	100%	38%	88%		89%	88%	88%	100%
Colonisation (total)	100%	100%	100%	38%	100%		100%	100%	100%	100%

W, weeks post infection.

Gerbils were classified as H pylori positive if culture and/or histology yielded positive results.