Table 3.

Infiltration of mononuclear and polymorphonuclear cells in the gastric antral and body mucosa of Mongolian gerbils infected with wild-type Helicobacter pylori or the oipA knockout strain

	Period	Antrum			Body
	Uninfected control	Wild-type	oipA mutant	Uninfected control	Wild-type	oipA mutant
MNC (months)
0	0 (0–0)	0 (0–0)	0 (0–0)	0 (0–0)	0 (0–0)	0 (0–0)
1	0 (0–0)	1 (0–3)	0 (0–0)	0 (0–0)	0 (0–1)	0 (0–0)
3	0 (0–0)	4 (0–5)*,**,#	3 (0–4)*,**	0 (0–0)	2 (0–4)*,**,#	0 (0–1)
6	0 (0–0)	5 (4–5)*,**	NE	0 (0–0)	3 (3–4)*,**,***	NE
12	0 (0–0)	4 (2–4)*,**	NE	0 (0–0)	4 (2–4)*,**,***	NE
PMN (months)
0	0 (0–0)	0 (0–0)	0 (0–0)	0 (0–0)	0 (0–0)	0 (0–0)
1	0 (0–0)	0 (0–2)	0 (0–0)	0 (0–0)	0 (0–1)	0 (0–0)
3	0 (0–0)	3 (0–4)*,**,#	1 (0–2)	0 (0–0)	1 (0–3)*,**,#	0 (0–0)
6	0 (0–0)	3 (2–4)*,**	NE	0 (0–0)	2 (1–3)*,**	NE
12	0 (0–0)	3 (0–3)*,**	NE	0 (0–0)	2 (0–3)*,**	NE

MNC and PMN infiltration levels are expressed as medians (ranges)

MNC mononuclear cells, PMN polymorphonuclear cells, NE not examined

^*P <0.05 compared with 0 month

^**P <0.05 compared with the wild-type infected group at 1 month

^***P <0.05 compared with the wild-type infected group at 3 months

^#P <0.05 compared with the oipA mutant-infected group at the same time point after infection