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Pinworm (Enterobius vermicularis) stool examination

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

This test checks for the presence of pinworms (a type of intestinal parasite) in your stool. Pinworms are small, thread-like worms that can cause itching, especially at night.

Quick summary

["A pinworm test helps diagnose infections that may require treatment."]

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

Key facts at a glance

LOINC
675-9
Short code
E vermicularis Spec Ql Pinworm Exam
Synonyms
E vermicularis Spec Ql Pinworm Exam
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
pinworm-examination
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 Matters

Pinworm infections are common in children and can spread easily in schools or households. If you or your child experience persistent itching around the anus or thighs, especially at night, this test may be recommended to check for pinworms. Early detection helps prevent discomfort and further spread of the infection.

What to Expect Before the Test

No special preparation is needed for this test. You may be asked to collect a small sample of your stool in a container provided by your healthcare provider. This is usually done during a routine office visit or at a lab.

How the Test Works

The collected stool sample is examined under a microscope to look for pinworm eggs or adult worms. This process helps confirm whether you have an active pinworm infection.

What the Results Mean

If pinworm eggs or worms are found, your healthcare provider will discuss next steps, which may include treatment with medication to kill the parasites. If no pinworms are detected, it means you are not currently infected, but you may still need to follow up if symptoms persist.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Pinworm test

Frequently asked questions

What symptoms might indicate a need for this test?
Symptoms such as intense itching around the anus or thighs, especially at night, may suggest a pinworm infection. However, some people with pinworms have no symptoms at all. This test is often recommended for individuals with these symptoms or in settings where pinworm infections are common.
How often should I get this test if I have a pinworm infection?
If you are diagnosed with a pinworm infection, treatment is usually effective, and you may not need repeated testing unless symptoms return. Follow your healthcare provider’s advice for follow-up care.
Can pinworms be spread to others?
Yes, pinworms can spread easily through direct contact with infected people or indirect contact with contaminated surfaces or clothing. Proper hygiene, such as washing hands thoroughly and changing bedding regularly, can help prevent the spread.
  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