TABLE 1.

Infection rate of CagA⁺ Helicobacter pylori and CagA^– H. pylori 1 week after last intragastric gavage.

Group	N	Rapid urease tests positive (N)	Geimsa staining positive (N)	Infection rate (%)
Method 1a
Control	10	0	0	0
CagA+ H. pylori	10	2	2	20
CagA– H. pylori	10	1	1	10
Method 2b
Control	10	0	0	0
CagA+ H. pylori	10	6	6	60
CagA– H. pylori	10	4	4	40
Method 3c
Control	10	0	0	0
CagA+ H. pylori	10	10	10	100
CagA– H. pylori	10	8	8	80
Method 4d
Control	10	0	0	0
CagA– H. pylori	10	10	10	100

^aMethod 1: Intragastric gavage once a day for 1 day; ^bMethod 2: Intragastric gavage once a day for 2 days; ^cMethod 3: Intragastric gavage once a day for 3 days; ^dMethod 4: Intragastric gavage once a day for 3 days, take 1 day break, then gavage once a day for 3 days again.