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Schistosoma antigen (serum/plasma) – Parasite-specific immunoassay

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

This test detects the presence of antigens from the parasitic worm *Schistosoma*, which can cause infections like schistosomiasis. It helps identify if you’ve been exposed to the parasite.

Quick summary

["This test may help diagnose or monitor a parasitic infection linked to *Schistosoma* worms."]

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

Key facts at a glance

LOINC
100142-9
Short code
Schistosoma sp 70kD Ab Ser Ql IB
Synonyms
Schistosoma sp 70kD Ab Ser Ql IB
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
ib
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 This Test Measures

The test looks for specific proteins (antigens) produced by the *Schistosoma* parasite in your blood. These proteins are released when the parasite is active in your body. The test is not used to identify the worm itself but to confirm exposure or infection.

Why It’s Done

Your healthcare provider may order this test if you have symptoms like skin rashes, itching, fever, or digestive issues (e.g., diarrhea, blood in stool) that could suggest *Schistosoma* infection. It’s also used in areas where schistosomiasis is common to screen for exposure.

Sample Collection and Preparation

A blood sample is taken from a vein in your arm. The blood is processed to separate the plasma or serum, which is then tested for the parasite’s antigens using a sensitive immunoassay method.

What to Expect Before the Test

No special preparation is needed, but inform your provider if you’re on blood-thinning medications or have a history of bleeding disorders. Avoid alcohol before the test if possible.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Schistosoma antigen test

Frequently asked questions

How long does it take to get results?
Results are typically available within 24 to 48 hours, depending on your lab’s processing schedule.
What does a positive result mean?
A positive result suggests you’ve been exposed to *Schistosoma* parasites and may have an active infection. Your doctor will discuss next steps, such as treatment options or further testing, based on your symptoms and medical history.
Can this test be used to track treatment progress?
Yes, this test can sometimes be used to monitor treatment response, especially if symptoms persist or recur. A decrease in antigen levels over time may indicate the parasite is being effectively treated or cleared from your body.
  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