Fluorescent Antibody Titration for Antihuman Influenza Virus Antibodies (Serum)

What This Test Measures

The test detects specific antibodies (immunoglobulins) that your immune system creates when it encounters the influenza virus. These antibodies are measured through a fluorescent antibody technique, which identifies their presence and concentration in your serum. This method helps track how your body reacts to the virus over time.

Why It’s Done

Doctors may order this test if you’ve had symptoms of influenza, received a flu vaccine, or are being evaluated for exposure in a high-risk setting (e.g., healthcare, travel). It can also help monitor immune response in certain clinical scenarios, such as evaluating vaccine effectiveness or diagnosing past infections.

Sample Collection and Preparation

A blood sample is drawn from a vein in your arm. The blood is processed to separate serum, which is then tested for antibody presence. This test does not require fasting and is typically done in a lab setting.

What to Expect Before the Test

No special preparation is needed, but inform your healthcare provider if you’re on any medications or have conditions that might affect blood tests (e.g., liver disease). Avoid alcohol before testing if instructed.