SARS-CoV-2 Nucleic Acid Detection by RT-PCR (Respiratory Specimen)

How the Test Works

The test uses a specialized probe designed to detect the SARS-CoV-2 virus’s unique genetic sequence. A sample of your respiratory secretions (e.g., nasal swab) is collected and analyzed using reverse transcription polymerase chain reaction (RT-PCR), a highly sensitive molecular method. This process amplifies and identifies viral genetic material, confirming the presence of the virus if detected.

Sample Collection

A healthcare provider will collect a sample from your upper respiratory tract, typically using a nasal swab. The swab is gently inserted into your nose and rotated to gather cells and fluids containing viral material. This sample is then sent to a lab for testing.

When You Might Need This Test

You may be tested for COVID-19 if you have symptoms like fever, cough, or shortness of breath; if you’ve been exposed to someone with COVID-19; or as part of routine screening in certain settings (e.g., healthcare facilities, travel). Your doctor will determine if testing is appropriate for your situation.

Test Limitations

While highly accurate, this test may not detect the virus in every case, especially if you’re in the early or late stages of infection. False negatives can occur if the sample isn’t collected properly or if the virus is present in low amounts. Results should be interpreted alongside clinical judgment and other factors.