Which test finding indicates the presence of H pylori infection?

Updated: Apr 26, 2021
  • Author: BS Anand, MD; Chief Editor: Philip O Katz, MD, FACP, FACG  more...
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Three kits (ie, CLOtest, Hp-fast, Pyloritek) are commercially available for H pylori testing, and each contains a combination of a urea substrate and a pH sensitive indicator. One or more gastric biopsy specimens are placed in the rapid urease test kit. If H pylori is present, bacterial urease converts urea to ammonia, which changes the pH, resulting in a color change.

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