
Welcome to EnteroTrack
EnteroTrack offers the Esophageal String Test (EST). The only non-endoscopic, office-based, and pain-free 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.
Proudly Partnered With

EST Effectiveness in Monitoring EoE
Eosinophil counts and EoEScores 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 People Are Saying
"I recommend it."
– Patient, Age 10
"The string test results are just as effective as endoscopy"
– EoE Clinician
"Kids can get back to being kids"

– Children’s Hospital of Colorado
"I wanted to find something else besides scoping every 6 – 9 months. I would definitely recommend it over scoping"
– Mother of EoE patient
"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 patie..."

– Dr. Khalaf, EoE Specialist, Univ. of South Florida
"I got to play on my phone for an hour. It was very easy"
– Taylor, Age 9, North Carolina
"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."
– Ashlyn, Age 22, Colorado
"It's significantly more affordable and less invasive than an endoscopy"
– Zach, Age 28, Colorado
"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 t..."
– Lauren, Age 23, Virginia
"I recommend it."
– Patient, Age 10
"The string test results are just as effective as endoscopy"
– EoE Clinician
"Kids can get back to being kids"

– Children’s Hospital of Colorado
"I wanted to find something else besides scoping every 6 – 9 months. I would definitely recommend it over scoping"
– Mother of EoE patient
"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 patie..."

– Dr. Khalaf, EoE Specialist, Univ. of South Florida
"I got to play on my phone for an hour. It was very easy"
– Taylor, Age 9, North Carolina
"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."
– Ashlyn, Age 22, Colorado
"It's significantly more affordable and less invasive than an endoscopy"
– Zach, Age 28, Colorado
"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 t..."
– Lauren, Age 23, Virginia
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).

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 LocationsFeatured 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 prodecure that allows your doctor to collect samples from your esopahagus.
Eosinophilic Gastrointestinal Disease Explained
Learn from one of our partners, Cured, about the disease that effects 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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