![]() Performance of Antigen Tests for SARS-CoV-2 All initial negative antigen test results should be confirmed with a NAAT or repeated with additional antigen tests following FDA’s recommendations on repeat testing. Patients who test positive should follow CDC isolation guidance for next steps. For additional comparison between NAAT and antigen tests, please see the Summary Table of NAAT and Antigen Test Differences.Īccurate identification of infection and clinical management of COVID-19 requires performing the test properly and correctly interpreting the results. For this reason, in situations where test sensitivity is of paramount importance, NAAT tests are preferred. Antigen tests for SARS-CoV-2 are generally less sensitive than real-time reverse transcription polymerase chain reaction (RT-PCR) and other nucleic acid amplification tests ( NAATs), which detect and amplify the presence of viral nucleic acid. Antigen tests are better at detecting a SARS-CoV-2 infection when someone has COVID-19 symptoms compared to if they do not. Most self-tests, or at-home tests, are antigen tests. Certain tests have age limitations refer to FDA’s website for more details.Īntigen tests produce results quickly (within minutes), and most can be used at the POC or at home. The currently authorized antigen tests include point-of-care (POC), laboratory-based, and self-tests available without a prescription. SARS-CoV-2 antigen tests are currently authorized for nasopharyngeal swab and nasal swab specimens. See FDA’s list of In Vitro Diagnostics EUAs. Food and Drug Administration (FDA) has granted emergency use authorization (EUA) for antigen tests that can identify SARS-CoV-2. Antigen tests are commonly used in the diagnosis of respiratory pathogens, including influenza viruses and respiratory syncytial virus (RSV). Your GP must assess what this test result means for you.Antigen tests are immunoassays that detect the presence of a specific viral antigen, which suggests current viral infection. If antibodies are detected in your sample, this indicates that you have previously been infected by the virus or that you have been vaccinated. SARS-CoV-2 antigen: parts of virus molecules, normally detected via a rapid antigen testĪntibodies against coronavirus are detected in a blood sample.SARS-CoV-2 RNA: the virus’s genetic material.Virus detection in sample from nose and/or throat. Overview of all relevant COVID-19-related analyses: ![]() ![]() You will find the test results when you log in. This is done to find out whether there could be a different explanation other than COVID-19 if you have symptoms that suggest COVID-19 infection. Which viruses and bacteria do the results show?īoth viruses and bacteria can cause respiratory infections, and your doctor will sometimes order other analyses in addition to SARS-CoV-2. This means that it is not possible to tell if there was coronavirus in the sample, or if you are infected with COVID-19. Inconclusive result: The test result is uncertain This means that coronavirus was not detected when the sample was taken. Negative result: Coronavirus was not detected This means that the coronavirus was detected in the sample, and you have COVID-19. Positive result: Coronavirus was detected In the case of ordinary tests, known as PCR tests or other similar methods, the result will be available within 1-4 days, while for rapid antigen tests, you will be able to see the test result as soon as it is ready and has been registered by the test station. To see the results, log in and go to Prøvesvar. You will no longer get an SMS or email when the results are ready. The length of time it takes to obtain a test result varies, but you will see it at the same time as it is sent from the test centre or laboratory to the doctor who requested the test. You will also find certain other test results in text form. You will not be able to see the images themselves. The diagnostic image results are a description of the images. You will find answers to analyses in pathology, histology and cytology, along with diagnostic images.
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