SARS-CoV-2 Nucleic Acid Detection, Lower Respiratory Specimen (Real-Time Polymerase Chain Reaction)

Why This Test Is Done

Your healthcare provider may order this test if you have symptoms like fever, cough, shortness of breath, or a sore throat, especially if you’ve been exposed to someone with COVID-19. It may also be used to monitor recovery or check for reinfection in certain situations.

What to Expect Before the Test

You’ll likely provide a sample via nasal or throat swab, or a deeper breath sample (like a bronchoalveolar lavage) if your doctor suspects severe lung involvement. No special preparation is needed, but inform your provider about any medications or conditions that could affect results.

How the Test Works

The test uses a process called real-time PCR to detect the virus’s genetic material. Tiny amounts of your sample are analyzed to identify specific sequences unique to SARS-CoV-2. Results are usually available within 24 hours.

What the Results Mean

A positive result means the virus is present in your sample, indicating an active infection. A negative result means the virus was not detected at the time of testing, but this does not always rule out infection if testing was done too early or if the sample was insufficient.