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Strongyloides IgG Immunoassay (Serum)

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

This test measures antibodies in your blood that your immune system produces in response to infection by the parasitic worm *Strongyloides stercoralis*. It helps diagnose chronic or past exposure to this soil-transmitted helminth.

Quick summary

["This test helps detect long-term infection that may not cause obvious symptoms."]

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

Key facts at a glance

LOINC
109034-9
Short code
Strongyloides IgG Msmt Ser
Synonyms
Strongyloides IgG Msmt Ser
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
82784
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 Might This Test Be Ordered?

Your healthcare provider may recommend this test if you have a history of travel to regions with high *Strongyloides* risk, unexplained chronic symptoms (e.g., fatigue, gastrointestinal issues), or conditions that weaken your immune system (e.g., HIV, chemotherapy). It may also be used in screening for latent infection in high-risk populations.

What Does a Positive Result Mean?

A positive result suggests past or ongoing exposure to *Strongyloides*. However, it does not confirm active infection—additional tests or clinical correlation may be needed. Chronic infection can sometimes lead to severe complications if untreated.

What Does a Negative Result Mean?

A negative result means your body has not produced detectable antibodies to *Strongyloides* at this time. It does not rule out acute infection, which may require different diagnostic approaches (e.g., stool exams or culture).

How Is This Test Performed?

A blood sample is drawn from a vein in your arm. The serum portion is then tested using an immunoassay method to detect specific antibodies against the parasite’s antigens.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

IgG Antibody to *Strongyloides stercoralis* (Serum)

Frequently asked questions

How long does it take to develop detectable antibodies after infection?
Antibodies may take weeks to months to develop after infection. Early acute infection may not show up on this test, so other diagnostic methods (e.g., stool exams) may be needed for active cases. Chronic infection can persist silently for years, especially in immunocompromised individuals.
Can this test differentiate between past infection and active infection?
No, this test only indicates past or ongoing exposure by detecting antibodies. Active infection requires clinical evaluation, possibly including stool microscopy or culture to identify live worms or larvae.
What are the most common symptoms of *Strongyloides* infection?
Symptoms may be mild or absent in chronic infection. Early symptoms can include diarrhea, abdominal pain, or skin rashes. Severe cases (e.g., in immunocompromised patients) may cause widespread infection, leading to lung issues, meningitis, or systemic symptoms like fever and weight loss.
  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