Family-based Helicobacter pylori infection status and transmission pattern in central China, and its clinical implications for related disease prevention

Table 3 Helicobacter pylori infection status in 51 families with children and other relatives

Family members (N)	H. pylori positive			H. pylori negative, n	Infection rate (%)
	Sub total, n	Type I H. pylori, n	Type II H. pylori, n
Total (190)	93	66	27	97	48.95
Father (51)	32	23	9	19	62.75
Mother (51)	32	22	10	19	62.75
Grandfather (4)	2	1	1	2	50.00
Grandmother (12)	8	6	2	4	66.67
Maternal grandfather (4)	1	0	1	3	25.00
Maternal grandmother (8)	3	2	1	5	37.50
Other relatives (3)	2	2	0	1	66.67
Child (57)	13	10	3	45	22.81

N: Number of family members in 51 families; n: Person per group; Type I H. pylori: H. pylori infection with type I strains; Type II H. pylori: H. pylori infection with type II strains; H. pylori: Helicobacter pylori; Infection rate: Number of H. pylori-positive family members/number of family members.