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Toxocara antibody serologic test (qualitative)

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

This test detects antibodies in your blood that may indicate past or current exposure to the parasitic worm Toxocara, which can cause infections like visceral larva migrans.

Quick summary

["Helps identify possible exposure to Toxocara parasites, which can affect organs and tissues."]

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

Key facts at a glance

LOINC
26660-1
Short code
Toxocara Ab Ser Ql
Synonyms
Toxocara Ab Ser Ql
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
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 Does This Test Measure?

The test measures the presence of antibodies (IgG) in your serum that your immune system produces in response to Toxocara infection. Antibodies are proteins your body makes to fight off foreign invaders like parasites. If you have been exposed, these antibodies may be detectable even if you are not currently sick.

Why Might You Need This Test?

Your healthcare provider may recommend this test if you have symptoms like fever, weight loss, or unexplained organ issues (such as liver or lung problems) that could be linked to a Toxocara infection. It’s also sometimes used in cases of unexplained eosinophilia (high white blood cell count with a specific type of cell).

What to Expect Before the Test

No special preparation is needed for this blood test. You may have a small needle inserted into your arm to draw blood, similar to other routine blood tests. If you’re pregnant or have a bleeding disorder, let your provider know before the test.

What to Expect After the Test

After the blood is drawn, you may feel slight bruising or soreness at the site, but this usually goes away quickly. You can resume normal activities immediately. If you experience excessive bleeding or pain, contact your provider.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Toxocara Antibody Screen

Frequently asked questions

How Accurate Is This Test?
This test is generally reliable for detecting past exposure but may not always show current infection. False negatives can occur if the infection is recent or if antibodies have cleared. False positives are rare but possible, especially in cases of other infections or autoimmune conditions.
What If My Test Results Are Positive?
A positive result may lead your provider to recommend further testing or treatment, such as additional blood tests or a stool sample to confirm active infection. Treatment with antiparasitic medications may be suggested if an infection is confirmed.
Can I Get This Test at Home?
No, this test is typically performed in a clinical laboratory using a blood sample drawn in a healthcare setting. Home diagnostic tests for parasites are not standard for Toxocara antibodies.
  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