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Serum Immunoassay for Japonicumab Antibody (Quantitative)

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

This test measures the amount of antibodies your body produces in response to the medication japonicumab, which is used to treat certain autoimmune conditions.

Quick summary

["This test helps monitor your immune response to japonicumab treatment over time."]

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

Key facts at a glance

LOINC
41423-5
Short code
S japonicum Ab Ser Ql IB
Synonyms
S japonicum 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

Why This Test Is Done

Your healthcare provider may order this test if you’re receiving japonicumab therapy to check whether your immune system is producing antibodies against it. This can help determine if the medication is working as intended or if adjustments are needed.

What to Expect Before the Test

No special preparation is usually required. You’ll have a small needle inserted into a vein (typically in your arm) to draw blood. The process is quick and generally painless.

What the Test Results Mean

Results are typically reported as a concentration level of antibodies in your serum. High levels may indicate an effective immune response, while very low or absent levels might suggest insufficient antibody production or immune suppression.

Possible Side Effects or Considerations

There are no major side effects from this blood draw, though you might experience mild discomfort or bruising at the injection site. If you have a history of blood clotting issues or are on blood thinners, let your provider know before the test.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Japonicumab Antibody Level

Frequently asked questions

How does this test help my healthcare provider?
This test helps assess whether your body is producing antibodies against japonicumab, which is crucial for monitoring treatment efficacy. Low antibody levels may indicate the need for dose adjustments or alternative therapies, while high levels suggest the immune system is responding appropriately.
What if my results are outside the expected range?
If your results fall outside typical ranges, your healthcare provider will discuss them with you. They may recommend further testing, adjustments to your medication, or additional monitoring to ensure you’re receiving the best possible treatment.
Can I eat or drink before this test?
You can eat and drink normally before this test, as no fasting is required. However, always follow your provider’s specific instructions for any medications or supplements you’re taking.
  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