<prompt> AH of the following are true about H. pylori EXCEPTMaximum concentration is in gastric pitUrease breath test is sensitiveGram negative spiral rodBlood group A is more susceptible  <response>: A Maximum concentration is in gastric pit H. pylori is a Gram-negative spiral rod, motile by a unipolar tuft of lopotrichous flagella. The bacteria are present only in the overlying mucus do not invade the mucosa. Gastric antrum is the commonest site of colonization, though any part of the stomach may be involved. 