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Antibody to *Echinococcus granulosus* (hydatid cyst) antibodies, serum/plasma

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

This test measures antibodies in your blood that may indicate exposure to the hydatid cyst parasite, often found in sheep or cattle. It helps diagnose infections caused by *Echinococcus granulosus*, which can lead to serious liver or other organ cysts.

Quick summary

["This test helps detect past or current exposure to a parasite that can cause cysts in organs."]

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

Key facts at a glance

LOINC
63390-9
Short code
ENA Ab Ser Ql ID
Synonyms
ENA Ab Ser Ql ID
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
immune-diffusion
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 detects specific antibodies (immunoglobulins) produced by your immune system in response to the parasite *Echinococcus granulosus*. These antibodies can appear after infection and may persist for years. The test does not directly measure the parasite itself but helps identify if your body has recognized it as a threat.

Why Might You Need This Test?

Your healthcare provider may order this test if you have symptoms like abdominal pain, unexplained weight loss, or organ enlargement (such as the liver or lungs). It may also be used in regions where hydatid disease is more common, such as parts of South America, Australia, or certain areas of the Middle East.

What to Expect Before the Test

No special preparation is needed. You may have a blood draw from a vein in your arm. If you are on blood-thinning medication, let your provider know before the test.

What to Expect After the Test

You may feel slight discomfort or bruising at the injection site. Most people return to normal activities immediately. Rarely, there may be mild swelling or pain.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Hydatid cyst antibody screen

Frequently asked questions

How long does it take to get results?
Results are typically available within 1 to 3 business days, depending on your lab’s processing time. Your healthcare provider will discuss the results with you.
Can this test be used to diagnose active infection?
This test helps identify past exposure or infection but is not always definitive for active disease. If symptoms suggest an active infection, additional tests (like imaging or parasite-specific antibodies) may be needed to confirm.
What if I have a history of parasitic infections?
If you’ve had past infections or live in a region where hydatid disease is common, your provider may recommend this test as part of monitoring or preventive care. Always follow your healthcare team’s guidance.
  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