Analysis of the Mid-Upper Gastrointestinal Tract in Adults


About this study

The purpose of this study is to find more information about the bacteria that live in the gastrointestinal tract. Bacteria are essential for human life; they are needed to digest food, break down certain vitamins and form a barrier against disease-causing bacteria. We are doing this research study to understand the relationship between bacteria (the human microbiome) and their role in health and disease.

Participation eligibility

Participant eligibility includes age, gender, type and stage of disease, and previous treatments or health concerns. Guidelines differ from study to study, and identify who can or cannot participate. There is no guarantee that every individual who qualifies and wants to participate in a trial will be enrolled. Contact the study team to discuss study eligibility and potential participation.

Inclusion Critieria:

  • Patients 18 years of age or older.
  • Patients with occult gastrointestinal bleeding undergoing antegrade double balloon endoscopy.

Exclusion Criteria:  

  • Women who are pregnant or nursing
  • Vulnerable adults including prisoners, or anyone unable to understand and give informed consent
  • Patients with inflammatory bowel disease

Participating Mayo Clinic locations

Study statuses change often. Please contact the study team for the most up-to-date information regarding possible participation.

Mayo Clinic Location Status

Rochester, Minn.

Mayo Clinic principal investigator

Purna Kashyap, M.B.B.S.

Closed for enrollment

More information


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