Fluorescent Immunoassay for Viral Antigen in Specimen (e.g., Respiratory Secretions)

How the Test Works

The test uses a fluorescent marker to identify the presence of viral particles in your sample. When the viral antigen binds to specific antibodies, it triggers a fluorescent signal that lab technicians can detect. This signal confirms whether the virus is present in your respiratory secretions.

What to Expect Before the Test

You’ll likely provide a nasal or throat swab sample (or other respiratory secretion) during a quick office visit. No special preparation is needed, but avoid rinsing your mouth or nose with water before testing.

What the Results Mean

A positive result means the test detected viral antigens, suggesting an active infection. A negative result means no detectable antigens were found, but this doesn’t always rule out infection if the test was taken too early. Follow-up testing may be recommended.

Common Uses for This Test

Doctors use this test to diagnose respiratory viral infections, especially when symptoms like cough, sore throat, or fever are present. It’s often used in urgent care settings or during outbreaks to quickly identify contagious viruses.