Fluorescent Immunoassay for Anti-Varicella-Zoster Virus IgG Antibodies (Serum/Plasma)

Why This Test Might Be Ordered

Your healthcare provider may recommend this test if you have a history of chickenpox or shingles, are planning pregnancy, or have symptoms like rash, fever, or nerve pain that could indicate reactivation of the virus. It may also be used for vaccination counseling or research purposes.

What to Expect During the Test

A small blood sample is drawn from a vein in your arm. The blood is processed to separate serum or plasma, which is then tested for specific antibodies. The test is usually done in a lab and results are available within a few days.

How the Results Are Interpreted

Results are qualitative (positive or negative) and indicate whether detectable antibodies are present. A positive result suggests past exposure to the virus, while a negative result means no detectable antibodies were found at the time of testing.

Clinical Significance

Positive results can confirm immunity from past infection, which is important for vaccination decisions, especially for high-risk individuals like pregnant women or those with weakened immune systems. Negative results do not necessarily mean you are susceptible to infection, as immunity can develop over time after exposure.