-
- Ella M Meumann and Jennifer Mb Robson.
- Sullivan Nicolaides Pathology, Bowen Hills, Brisbane.
- Aust Prescr. 2023 Jun 1; 46 (1): 131713-17.
AbstractNucleic acid amplification tests (NAATs), including polymerase chain reaction (PCR) assays, are more sensitive for the detection of SARS-CoV-2 than rapid antigen tests (RATS), and are the gold standard for diagnosis of acute COVID-19. However NAATs can remain positive for weeks following infection due to low-level shedding of non-viable viral fragments. RATs (in particular self-testing) are the mainstay of COVID-19 diagnosis due to their convenience, speed and high specificity. The sensitivity of RATs is highest within seven days of symptom onset. A negative RAT result may warrant a NAAT or repeat RAT for confirmation. The presence of spike antibodies is consistent with either vaccination or infection. Nucleocapsid antibodies suggest a previous infection. Serological tests measuring neutralising antibodies that infer immunity are not readily available.(c) Therapeutic Guidelines.
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