<prompt> All are tests used to assess the treatment response in helicobacter pylori infection, EXCEPT:Urea breath test, theStool antigen testBiopsy-based testsSerology  <response>: The urea breath test, the stool antigen test, and biopsy-based tests can all be used to assess the success of treatment Ref:Harrisons Principles of Internal Medicine, 18th Edition, Page 1221 