Table 1.

Rates of immune protection of H pylori vaccine with different kinds of adjuvant

Groups	n	H pylori positive n (%)	Rates of immune protection (%)
(1) Control	10	10 (100)	0
(2) Chi-solution	12	12 (100)	0
(3) Chi-particles	13	13 (100)	0
(4) Hp antigen	10	10 (100)	0
(5) Hp antigen + CT	12	5 (41.67)	58.33d
(6) Hp antigen + chi-solution	10	4 (40)	60ab
(7) Hp antigen + chi-particles	10	4 (40)	60ab
P < 0.001

^aP < 0.05 vs (1) and (4) groups;

^bP < 0.01 vs (2) and (3) groups;

^dP < 0.01 vs (1)-(4) groups; chi = chitoson.