Esophageal String Test for Eosinophilic Esophagitis in People with Dysphagia

This study is testing if a simpler, less invasive test called the Esophageal String Test (EST) can accurately diagnose Eosinophilic Esophagitis (EoE), a condition causing inflammation in the esophagus (the tube that moves food to your stomach). Currently, EoE is diagnosed using an endoscopy, which is a more involved procedure. Researchers want to see if the EST, which collects fluid from your upper digestive tract, can be a good alternative. You may be able to join if you are 18-65 years old, have trouble swallowing (dysphagia) or a history of food getting stuck, and were born in Africa or have parents born in Africa. The study will determine how well the EST identifies EoE compared to current methods.

Study design
This is an interventional study planning to enroll 70 participants. Participants in the U.S. and Mali will have an Esophageal String Test (EST) before a planned endoscopy.
What's involved
You will be screened, provide blood, stool, urine, and skin swab samples, and complete questionnaires. An Esophageal String Test will be performed before your endoscopy.
Compensation
Not stated in the trial record.
Follow-up
The primary endpoint is measured at the end of the study, but specific follow-up duration is not detailed.

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NCT07027826

The Esophageal String Test as a Diagnostic Screening Tool for Eosinophilic Esophagitis Among Africans With Dysphagia in Mali and the United States

Recruiting
NAAges 18–65InterventionalDiagnostic
National Institute of Allergy and Infectious Diseases (NIAID)
~70 participants
Updated 2026-08-28 on ClinicalTrials.gov
What's tested:Esophageal string test

At a glance

Recruiting sites
1 of 3 listed sites are recruiting right now
RecruitingSuspended, closed, or not yet open
What they're measuring
Sensitivity and specificity of the esophageal string test to detect Eosinophilic Esophagitis.
Measured over End of study
Dysphagia
Eosinophilic Esophagitis
3 sites across 2 states
Mali2
Maryland1
  • Gregory M Constantine, M.D. · PRINCIPAL_INVESTIGATOR · National Institute of Allergy and Infectious Diseases (NIAID)

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  • Sensitivity and specificity of the esophageal string test to detect Eosinophilic Esophagitis.End of study

    Assess the accuracy of the 1-hour EST as a diagnostic screening tool for EoE in populations with limited access to subspecialty care. Sensitivity and specificity provide a measure of accuracy when compared to the diagnostic gold standard.