Abstract
Examinations of 83 patients and 13 healthy subjects with the augmented histamine test and gastric biopsy show that a maximal acid secretion lower than 10 mEq HCl/hour signifies a diffuse gastritic lesion, the type of which can be verified by a single gastric biopsy. Detailed investigations of the nature and clinical course of gastritis, however, require repeated tests of gastric function and multiple gastric biopsies.