Exalenz Dual Mode System Compared to Biopsy for H.Pylori Detection

Patients undergoing esophagogastroduodenoscopy (EGD) for initial diagnosis of H.pylori
infection or post therapy confirmation of eradication will be eligible to participate in the
trial. Two sets of biopsies will be taken: one set for histological analysis and one set for
rapid urease test (RUT) analysis. The two results will be used as a gold standard composite
score in determining the presence of H.pylori bacteria in the stomach. The Urea Breath Test
(UBT) using the Exalenz Dual Mode BreathID Hp System will also be performed within a week of
the biopsy. The outcome of the UBT will be compared to composite score of the biopsy and the
accuracy of the UBT will be evaluated. The UBT will be performed using breath collection
bags, where the subject will be asked to breathe into the bags before and after ingestion of
the 13C-labelled urea.

Inclusion Criteria:

- Be at least 18 years of age.

- Have the ability and willingness to sign the Informed Consent Form.

- Present with clinical indication of H. pylori and a candidate for upper endoscopy

For Initial Diagnosis arm:

• Symptomatic patients naïve to H.pylori treatment in the past 18 months

For Post-Therapy arm:

- Documented biopsy with positive outcome prior to eradication therapy (including
method of determination)

- Documented eradication therapy within the past 6 months and completed at least 6
weeks prior to UBT

Exclusion Criteria:

- Participation in other interventional trials.

- Antibiotics and/or Bismuth preparations within four (4) weeks prior to breath
test.

- PPI or H2 blockers within two (2) weeks prior to breath test.

- Pregnant or breastfeeding women.

- Allergy to test substrates.

- Patient did not fast for the hour prior to the UBT