✅ The Esophageal String Test®(EST) is now covered by Medicare.
Welcome to EnteroTrack
EnteroTrack offers the Esophageal String Test® (EST). The only non-endoscopic, and office-based method to manage EoE
The EnteroTracker®
The EnteroTracker is used to perform the Esophageal String Test and aims to:
Provide a minimally invasive procedure that allows your doctor to collect samples from your esophagus.
Provide frequent monitoring of esophageal inflammation in Eosinophilic Esophagitis (EoE), reducing the need for repetitive invasive procedures.
Provide precise insights into disease progression, treatment responses, and management of (EoE).
Our easy four step process:
Secure
Swallow
Relax
Retrieve
For EoE Patients
The Esophageal String Test is particularly valuable for patients with Eosinophilic Esophagitis who may need multiple procedures to:
- Monitor disease activity
- Assess response to treatment
- Evaluate for food triggers
- Reduce the need for repeated endoscopies
For Clinicians
The Esophageal String Test has demonstrated efficacy in monitoring Eosinophilic Esophagitis (EoE) and assessing the microbiome.
- Acquire mucosal content samples that serve as a liquid biopsy, facilitating analysis for disease-related biomarkers at reference laboratories.
- In-Office Monitoring of Eosinophilic Esophagitis
- The EnteroTracker® is a device to be used for collection of fluid/mucus from the upper gastrointestinal tract of adult and pediatric patients.
Find a Test Location Near You
Ask your doctor about EnteroTracker® and the Esophageal String Test® — a minimally invasive option for monitoring EoE and other conditions.
We’re helping patients across the U.S. access accurate testing through a growing network of trusted clinicians and hospitals.
Browse LocationsProudly Partnered With
EST® Effectiveness in Monitoring EoE
Eosinophil counts and EoEScore® results significantly correlated during treatment, distinguishing patients with active EoE from treatment-associated remissions for 93.9% of ESTs performed.
Source: Ackerman SJ, Kagalwalla AF, Pan Z, et al. The minimally invasive 1-hour Esophageal String Test (EST) monitors therapeutic changes in mucosal inflammation in eosinophilic esophagitis. Am J Gastroenterol. Published online November 7, 2024. doi:10.14309/ajg.0000000000003192
What are people saying?
Hear from patients, families, and clinicians who have experienced the Esophageal String Test®.
Ashlyn, 22
Patient from Colorado
“I love the String Test for the ease and cost effectiveness of it. It’s much less daunting than endoscopies and it makes treatment more manageable.”
Dr. Khalaf
EoE Specialist, University of South Florida
“The String Test is excellent because it helps avoid anesthesia and sedation for patients. I think this is greatly going to change the care that patients with EoE have.”
Children’s Hospital of Colorado
“Kids can get back to being kids.”
Mother of EoE Patient
“I wanted to find something else besides scoping every 6–9 months. I would definitely recommend it over scoping.”
Matt, 52
Colorado
“I've been stuck in a cycle of food elimination and reintroduction for years. It's stressful and socially difficult. My issues with seasonal allergies, postnasal drip, reflux, globus and throat tension make it impossible to tell when I'm having EoE symptoms during a food reintroduction. The string test has been a game changer. It lets me know with confidence whether a food is truly an EoE trigger. It has been awesome to reintroduce foods I was needlessly avoiding for so long. Thank you!”
View full testimonial →
Patient, 10
“I recommend it.”
Taylor, 9
Patient from North Carolina
“I got to play on my phone for an hour. It was very easy!”
Zach, 28
Patient from Colorado
“It's significantly more affordable and less invasive than an endoscopy.”
Lauren, 23
Patient from Virginia
“The string test was a much better experience than having an endoscopy. The procedure was easy, and not uncomfortable at all. We are so thankful that this technology is available for use in monitoring EOE.”
View full testimonial →
Ashlyn, 22
Patient from Colorado
“I love the String Test for the ease and cost effectiveness of it. It’s much less daunting than endoscopies and it makes treatment more manageable.”
Katie, 51
Patient from California
“I had the esophageal String Test at my allergists office. I was so excited that it was offered to me because I really don’t like having so many Endoscopies to monitor my EoE. The String Test only lasted an hour, and I was able to sit and do work as the string was collecting data. I love having this option as I figure out my EoE triggers.”
View full testimonial →
Mark, 42
“The esophageal string test was far less invasive than an endoscopy, and the recovery was simple. I was able to go about my day with minimal disruption. It was definitely worth it to get the answers I needed.”
View full testimonial →
Jill, 43
Patient from Utah
“I think it's a great option to avoid having an endoscopy done multiple times a year. Overall, it was a positive experience and much easier than I expected.”
Dr. Khalaf
EoE Specialist, University of South Florida
“The String Test is excellent because it helps avoid anesthesia and sedation for patients. I think this is greatly going to change the care that patients with EoE have.”
EoE Clinician
“The string test results are just as effective as endoscopy.”
Children’s Hospital of Colorado
“Kids can get back to being kids.”
Mother of EoE Patient
“I wanted to find something else besides scoping every 6–9 months. I would definitely recommend it over scoping.”
Matt, 52
Colorado
“I've been stuck in a cycle of food elimination and reintroduction for years. It's stressful and socially difficult. My issues with seasonal allergies, postnasal drip, reflux, globus and throat tension make it impossible to tell when I'm having EoE symptoms during a food reintroduction. The string test has been a game changer. It lets me know with confidence whether a food is truly an EoE trigger. It has been awesome to reintroduce foods I was needlessly avoiding for so long. Thank you!”
View full testimonial →
Patient, 10
“I recommend it.”
Taylor, 9
Patient from North Carolina
“I got to play on my phone for an hour. It was very easy!”
Zach, 28
Patient from Colorado
“It's significantly more affordable and less invasive than an endoscopy.”
Lauren, 23
Patient from Virginia
“The string test was a much better experience than having an endoscopy. The procedure was easy, and not uncomfortable at all. We are so thankful that this technology is available for use in monitoring EOE.”
View full testimonial →
Ashlyn, 22
Patient from Colorado
“I love the String Test for the ease and cost effectiveness of it. It’s much less daunting than endoscopies and it makes treatment more manageable.”
Katie, 51
Patient from California
“I had the esophageal String Test at my allergists office. I was so excited that it was offered to me because I really don’t like having so many Endoscopies to monitor my EoE. The String Test only lasted an hour, and I was able to sit and do work as the string was collecting data. I love having this option as I figure out my EoE triggers.”
View full testimonial →
Mark, 42
“The esophageal string test was far less invasive than an endoscopy, and the recovery was simple. I was able to go about my day with minimal disruption. It was definitely worth it to get the answers I needed.”
View full testimonial →
Jill, 43
Patient from Utah
“I think it's a great option to avoid having an endoscopy done multiple times a year. Overall, it was a positive experience and much easier than I expected.”
Dr. Khalaf
EoE Specialist, University of South Florida
“The String Test is excellent because it helps avoid anesthesia and sedation for patients. I think this is greatly going to change the care that patients with EoE have.”
EoE Clinician
“The string test results are just as effective as endoscopy.”
Children’s Hospital of Colorado
“Kids can get back to being kids.”
Meet Jonah
“It was a huge relief for him. It ended this yearslong dietary restriction.”
– Josh, Jonah’s dad
As a young kid, Jonah did something no kid wants to do: skip pizza and ice cream. When he was 5 years old, he told his parents there was a “ball in his throat,” a sensation linked to eosinophilic esophagitis (EoE).
“It was a huge relief for him. It ended this yearslong dietary restriction.”
– Josh, Jonah’s dad
As a young kid, Jonah did something no kid wants to do: skip pizza and ice cream. When he was 5 years old, he told his parents there was a “ball in his throat,” a sensation linked to eosinophilic esophagitis (EoE).
Featured Videos
Featured Articles
Understanding EoE: A Simple Overview
Learn what Eosinophilic Esophagitis is, how it’s diagnosed, and why early detection matters.
APFED/String Test Brochure
A minimally invasive procedure that allows your doctor to collect samples from your esophagus.
Eosinophilic Gastrointestinal Disease Explained
Learn from one of our partners, Cured, about the disease that affects many.
Latest Publications
Questions? Let’s talk.
Whether you're a patient, provider, or partner — we’re here to help. Reach out to get more details or schedule a demo of the EnteroTracker.
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