A rapid screening test for gastric achlorhydria.
D000126:Achlorhydria / Q000175:diagnosis*; D000328:Adult; D000368:Aged; D002214:Capsules; D003224:Congo Red; D005260:Female; D005745:Gastric Acidity Determination; D006801:Humans; D008297:Male; D008875:Middle Aged
D002214:Capsules; D003224:Congo Red