Subjects who tested positive to a screening urine test, and subsequently to a urea breath test, will be invited to a visit where the aims, procedures, risks, benefits, and issues of confidentiality and subject's right will be revisited and a consent form will be given for them to take home and review. Subjects will be asked questions to screen for eligibility prior to a clinical evaluation by the Medical director, and will be asked about current medical conditions, dyspepsia symptoms, if currently pregnant, medical personal and family history, and their weight, height, 3' resting blood pressure, heart beat, and temperature will be measured and recorded, a blood sample will be collected to screen for kidney and liver conditions. If the research assistant deems the persons eligible, and willing to take part s/he will schedule an appointment to be seen by Dr. Salazar and bring the signed consent. Subjects will be asked to be fasting for at least eight hours. Once the results of kidney and liver functions are available, the subjects will be seen by Dr. Salazar to assess inclusion and exclusion criteria. At that time, while subjects have been fasting for at least 3 hours, Dr. Salazar will collect samples for culture from gastric mucosa using the Baylor oro-gastric brush as follows: after topical oral anesthesia, the brush assembly is swallowed, the brush is extended in the stomach and to and fro for 3-4 cm, 3-4 times and then retracted into the protective sleeve and withdrawn from the patient (total time after anesthesia ~1 min). The brush will be gently touched to a glass slide for Gram staining, then tip of the brush will be cut off and the brush shaken in a dram vial containing approximately 1 mL of cysteine transport media with 20% glycerol.