Search results
May 12, 2023 · Amplifying those nucleic acids enables NAATs to detect very small amounts of SARS-CoV-2 RNA in a specimen, making these tests highly sensitive for diagnosing COVID-19. In other words, NAATs can reliably detect small amounts of SARS-CoV-2 and are unlikely to return a false-negative result of SARS-CoV-2.
- Point-Of-Care (Poc)
Laboratories or point-of-care testing sites that have...
- Other Diagnostic Tests
Breath Tests. Other diagnostic tests may be used to detect...
- Testing Overview
Nucleic acid amplification tests (NAATs) are highly...
- Point-Of-Care (Poc)
- Diagnostic Testing For Sars-Cov-2 Infection
- Antigen Testing For Sars-Cov-2 Infection
- Nucleic Acid Amplification Testing For Sars-Cov-2 Infection
- Serologic Or Antibody Testing For Diagnosis of Sars-Cov-2 Infection
- Serologic Testing and Immunity to Sars-Cov-2 Infection
For diagnosing current SARS-CoV-2 infection, the Centers for Disease Control and Prevention (CDC) recommends using either a nucleic acid amplification test (NAAT) or an antigen test.1 Testing may also be used for screening and to determine the length of a patient’s isolation period.2There may be a window period of up to 5 days after exposure before...
Antigen-based diagnostic tests are widely used at home, at the point of care, and in the laboratory because of their low cost, rapid turnaround time, and availability. Antigen tests and laboratory-based NAATs have similar high specificity. False positive test results can occur with antigen tests, although they are unlikely when the tests are used c...
NAATs, such as reverse transcription polymerase chain reaction–based diagnostic tests, which detect viral nucleic acids,7are the most sensitive tests for detecting current SARS-CoV-2 infection. Diagnostically, some NAATs may produce false negative results if a mutation occurs in the part of the virus’s genome that is assessed by that test.8 The FDA...
Unlike NAATs and antigen tests, which detect the presence of SARS-CoV-2, serologic or antibody tests can detect recent or prior SARS-CoV-2 infection or vaccination. The CDC recommends that antibody tests should not be used to diagnose current SARS-CoV-2 infection.12 It may take 21 days or longer after symptom onset for seroconversion to occur (i.e....
Currently, antibody tests are not recommended for assessing SARS-CoV-2 immunity following COVID-19 vaccination or for assessing the need for vaccination in a person who is unvaccinated. The FDA has issued EUAs for more than 80 SARS-CoV-2 serologic tests since the beginning of the pandemic. However, these tests are not currently authorized for routi...
TEST: 139900. CPT: 87635. Print Share Include LOINC® in print. Synonyms. 2019 Novel Coronavirus. COVID-19. SARS-CoV-2. Special Instructions. Please note: Labcorp does not currently collect specimens for this test. Patients for whom testing has been ordered should not be sent to a Labcorp location to have a specimen collected.
Sep 14, 2021 · There are currently two primary types of COVID-19 tests being used to test patients for COVID-19: molecular tests (also known as nucleic acid, RNA or PCR tests) and rapid antigen tests. The third type of testing looks for antibodies created to combat the virus. While sometimes used, these tests can only identify if you had the virus in the past.
SARS-CoV-2 reverse transcriptase–polymerase chain reaction (RT-PCR) testing is highly sensitive (99%) but less specific (approximately 95%) for contagious COVID-19 and may be positive for ≥90 days after infection. Viral antigen tests have lower analytic sensitivity than RT-PCR but are more specific for contagious disease
COVID-19 Negative (SARS-CoV-2 RNA Not Detected) Test Result. If your COVID-19 test was negative, this means that the test did not detect the presence of COVID-19 in your nasal secretions. This result would suggest that you are not currently infected with COVID-19.
