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Study identifier: NCT07027826 Synced from ClinicalTrials.gov · July 28, 2026
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The Esophageal String Test as a Diagnostic Screening Tool for Eosinophilic Esophagitis Among Africans With Dysphagia in Mali and the United States

Condition: Dysphagia · Eosinophilic Esophagitis  ·  Sponsor: National Institute of Allergy and Infectious Diseases (NIAID)

PhaseNA
Planned participants70
Who can joinAll sexes, 18 Years to 65 Years
Healthy volunteersNo

About this study

Background: Eosinophilic esophagitis (EoE) is a disease that causes inflammation in the esophagus. The esophagus is the tube that moves food from the mouth to the stomach. Diagnosing EoE currently requires a specialized tool called an endoscope. The esophageal string test (EST) is another test; the EST collects fluid from the upper digestive tract. An EST is simpler and cheaper than an endoscopy. Researchers want to know if an EST can diagnose EoE. Objective: To test if the EST can diagnose EoE in people who have trouble swallowing. Eligibility: Adults aged 18 to 65 years with trouble swallowing. They must have been born in the African continent or their parents were born in Africa. Design: Participants will be screened. They will give blood, stool, urine, and skin swab samples. They will complete surveys about their medical history, diet, symptoms, and home environment. They will bring a sample of their drinking water for testing. Participants will have an EST. They will swallow a pill capsule that contains a nylon string. One end of the string will be taped to their cheek. The string will unravel down the esophagus and into the stomach. It will be pulled out after 1 hour. Fluids that soaked into the string will be tested. At a different visit, participants will have an endoscopic exam. An endoscope is a flexible tube that is inserted down the mouth; it can be used to take tissue samples from the esophagus, stomach, and small intestine. Participants will have a fin…

This description comes directly from the study's public registry record.

Talk to the study team

Gregory M Constantine, M.D.  ·  (301) 633-6453  ·  constantinegm@nih.gov

Always discuss trial participation with your own doctor first.

Locations (3)

National Institutes of Health Clinical CenterBethesda, Maryland, United StatesRecruiting
Gabriel Toure University Hospital CenterBamako, MaliNot Yet Recruiting
Mali International Center for Excellence in ResearchBamako, MaliNot Yet Recruiting

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Source record: clinicaltrials.gov/study/NCT07027826