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Rabies Virus Neutralizing Antibody Titration (Serum/Plasma)

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

This test measures your body’s immune response to rabies by checking for antibodies that can neutralize the virus. It’s used to confirm protection after vaccination or exposure.

Quick summary

["This test helps determine if your immune system has developed protection against rabies."]

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

Key facts at a glance

LOINC
43980-2
Short code
RABV NAb Titr Ser Nt
Synonyms
RABV NAb Titr Ser Nt
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
neut
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 Matters

Rabies is a deadly virus spread through animal bites or scratches. If you’ve been exposed or vaccinated, this test ensures your body is making the right antibodies to fight it. It’s especially important for travelers, healthcare workers, or those with occupational risks.

How the Test Works

A small blood sample is taken from your arm. The lab tests your serum or plasma for antibodies that can neutralize rabies virus particles. The result is expressed as a titer (a measure of antibody strength).

What to Expect Before the Test

No special preparation is needed. You may have a slight bruise or soreness at the injection site, but this usually fades quickly. If you’re on blood-thinning medication, let your provider know before the test.

What the Results Mean

Results show the highest dilution of your blood that still blocks rabies virus activity. A protective level is typically defined by your healthcare provider based on your vaccination history or exposure risk.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

High antibody titers after vaccination indicate immunity. Low or absent titers may mean you need booster shots or further evaluation. This test is critical for post-exposure prophylaxis (PEP) decisions and monitoring vaccine effectiveness.

Short name

Rabies Antibody Test

Frequently asked questions

How long does it take to get results?
Results are usually available within 3–5 business days, depending on lab processing times. Your healthcare provider will discuss the results with you during a follow-up visit.
What does a positive result mean?
A positive result means your blood contains antibodies that can neutralize rabies virus. This confirms immunity and protects you from infection if exposed. Always follow your provider’s advice for ongoing care.
Can I get this test if I’m not vaccinated?
Yes, this test can be done for anyone, even if unvaccinated. It’s used to assess exposure risk, monitor vaccine response, or evaluate immune status after potential rabies exposure.
  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