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Eosinophil count in stool (qualitative/quantitative microscopic examination)

Published: August 9, 2026Updated: August 16, 2026

This test checks for the presence of eosinophils, a type of white blood cell, in your stool. Eosinophils may indicate certain gastrointestinal conditions or allergic responses.

Quick summary

["Eosinophils in stool can signal possible inflammation or allergic reactions in the digestive tract."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
22287-7
Short code
E histolyt IgA Ser-aCnc
Synonyms
E histolyt IgA Ser-aCnc
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
82784
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

Why This Test Might Be Ordered

Your doctor may recommend this test if you have symptoms like persistent diarrhea, abdominal pain, or unexplained weight loss, especially if other tests (like blood work or endoscopy) haven’t identified a cause. It can also help evaluate conditions like inflammatory bowel disease, food allergies, or parasitic infections.

What to Expect Before the Test

No special preparation is usually needed, but you may be asked to collect a fresh stool sample in a clean container. If you’re using a stool collection kit, follow the instructions carefully to ensure accuracy.

How the Test Works

A trained lab technician examines a microscopic sample of your stool under a microscope to count eosinophils. The test can be qualitative (just detecting presence) or quantitative (measuring exact numbers), depending on the method used.

Possible Results and Their Meaning

A positive result (eosinophils present) may suggest inflammation, allergic reactions, or infections in the gut. A negative result doesn’t rule out all causes—other tests or further evaluation may still be needed.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Stool eosinophil test

Frequently asked questions

What does a positive result mean?
A positive result (presence of eosinophils) may indicate inflammation, allergic reactions, or infections in your digestive system. This doesn’t always mean a specific diagnosis, but it can guide further testing or treatment plans.
How often should I get this test?
Your doctor will determine how often you need this test based on your symptoms, medical history, and other test results. It may be done once or repeated if symptoms persist or worsen.
Can I eat or drink anything before the test?
No special diet is required, but avoid using laxatives or stool softeners unless instructed by your doctor. Collect a fresh stool sample for the most accurate results.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy