What is Urea Breath Test (UBT)? The urea breath test is a rapid diagnostic procedure used to identify infections by Helicobacter pylori, a spiral bacterium implicated in gastritis, gastric ulcer, and peptic ulcer disease. It is based upon the ability of H. pylori to convert urea to ammonia and carbon dioxide. When you have these following signs or symptoms your doctor may refer you for Urea Breath Test (UBT). • An ache or burning pain in your abdomen • Abdominal pain that's worse when your stoma