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Eosinophils, Urine — Microscopic Examination

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

A urine test that looks for eosinophils, a type of white blood cell, usually in a microscopic examination of urine sediment.

Quick summary

["Detecting increased urine eosinophils may help evaluate allergic or inflammatory conditions, but the result is not specific by itself."]

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

Key facts at a glance

LOINC
105149-9
Short code
MRA UE ves-L
Synonyms
MRA UE ves-L
Category
liver
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
mr-angio
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

What is this test?

This test examines a urine sample for eosinophils, a type of white blood cell involved in allergic and immune responses. The cells are usually identified by reviewing urine sediment under a microscope.

Why might I need this test?

A urine eosinophil test may be considered when a clinician is evaluating unexplained inflammation, allergic reactions, or certain kidney conditions. It is not commonly used alone, so results are interpreted with symptoms and other laboratory findings.

How is the test performed?

A urine specimen is collected and prepared for microscopic analysis. The laboratory examines the urine sediment and reports the presence or quantity of eosinophils found.

How do I prepare for the test?

Follow your clinician's collection instructions, which may include a clean-catch midstream sample. The urine should be tested promptly; special fasting is generally not required unless your clinician says otherwise.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Urine eosinophils

Frequently asked questions

What are urine eosinophils?
They are white blood cells that can enter the urine during allergic or inflammatory conditions. Their presence may support a clinical evaluation but does not establish a diagnosis by itself.
Does an abnormal result mean I have an allergy?
No. Increased urine eosinophils can have several causes, including allergic conditions, kidney inflammation, and other urinary tract inflammation.
Are fasting or special preparation instructions needed?
Fasting is usually not required. If your clinician provided a specific urine collection method or timing, follow those instructions carefully.
  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