<prompt> True about Helicobacter pylori are all except:Urea, breath test is diagnosticGram negative, flagellated bacilliRisk factor for development of adenocarcinoma of stomachIt provides life-long immunity  <response>: Ans. is d i.e., It provides life-long immunityRef: Harrison, 17the, p. 946, 19the, p. 1038; Ananthanarayan, 9the, p. 400Helicobacter pylori infection doesnt provide life-long immunity. 