1.   The relationship between H pylori, age, and gastric acid secretion is important as H pylori infection causes active chronic gastritis which may progress to gastric atrophy.

2.   All infected subjects had active chronic gastritis on histological examination.

3.   The prevalence of active chronic gastritis and subsequent gastric atrophy increases with age.

4.   Chronic atrophic gastritis and chronic active gastritis were graded as mild, moderate and severe.