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Eosinophil count (qualitative stool 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 infections, allergies, or inflammatory conditions.

Quick summary

["Eosinophils in stool can signal underlying health concerns that require further evaluation."]

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

Key facts at a glance

LOINC
108649-5
Short code
E histolyt Ag Msmt Stl
Synonyms
E histolyt Ag Msmt Stl
Category
chemistry
Sample
stool
Container
Clean container
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
5 g
Stability
Refrigerated: 24h, Frozen: 7d
TAT
4–24 hours
Order
routine

Your doctor may order this test to help find the cause of symptoms you are having, to check how well a treatment is working, or to screen for a condition before it causes problems. It can also be part of a routine checkup to monitor your overall health and guide decisions about your care.

Your healthcare provider may recommend this test if you have symptoms like persistent diarrhea, abdominal pain, or unexplained weight loss, especially if you suspect conditions like parasitic infections, inflammatory bowel disease, or allergic reactions.

Before the test, your healthcare team will explain the procedure and answer any questions you may have. You may be asked about your medications, allergies, and other health conditions. Follow any specific instructions your doctor gives you, such as adjusting medicines or avoiding certain activities beforehand.

No special preparation is needed. Bring any medications you’re currently taking to your appointment. Avoid eating or drinking anything after midnight before testing if instructed, as some stool tests require fasting.

During the test, a trained professional will carry out the procedure in a clinic, hospital, or laboratory setting. It is usually quick and generally well tolerated, though you may feel brief discomfort. The visit often takes only a short time, and most people can return to their normal activities right away.

A small sample of your stool will be collected in a container. The sample is then examined under a microscope to identify eosinophils, which appear as distinct cells with a characteristic two-lobed nucleus.

Your results will be compared with established reference ranges to show whether your values fall within a normal range. A result outside that range does not always mean something is wrong, so your doctor will review the findings together with your symptoms, medical history, and other test results before recommending next steps.

Results are qualitative (positive or negative). A positive result means eosinophils were detected, which may suggest an underlying condition requiring further medical evaluation. A negative result does not rule out all causes.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: Eosinophil Detection in Stool

Short name

Eosinophil detection in stool

Frequently asked questions

Eosinophils in stool are often associated with parasitic infections (e.g., strongyloidiasis), certain inflammatory bowel diseases (e.g., Crohn’s disease), or allergic reactions. They may also appear in conditions like eosinophilic esophagitis or eosinophilic gastroenteritis.
A positive result usually means the test detected the substance or condition it was looking for. However, it does not always confirm a diagnosis, because some tests can be positive for other reasons. Your doctor will explain what your specific result means and whether any follow-up testing or treatment is needed.
A positive result indicates the presence of eosinophils in your stool, which may signal an infection, inflammation, or allergic response. Your doctor will discuss next steps, such as additional tests or treatments, based on your symptoms and overall health.
It depends on the type of test you are having. Some tests require fasting for a certain number of hours, while others do not. Your doctor or the laboratory will give you clear instructions before your appointment. If you are unsure, call ahead and ask, because eating or drinking when you should not can affect the accuracy of your results.
Follow your healthcare provider’s instructions. Some stool tests require fasting, while others do not. Always check with them before the test to avoid interfering with results.
Results are typically available within 1–3 business days, depending on lab processing times. Your doctor will contact you once they are ready to discuss the findings.
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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