The medical use of the NS1 antigen test can be defined to diagnose dengue infections and is effective to 1st day detection. Additionally, NS1 assay is useful for differential diagnostics in regards to flaviviruses. NS1 is present in the serum of infected persons directly at the onset of clinical symptoms in primary dengue infection and produces a strong humoral response. It is detectable before the appearance of IgM antibodies. DENV by NS1 antigen is laboratory confirmation of dengue in people also assessing clinical aspects (as well as, taking into account where the individual may have traveled recently).[5] Serological tests such as an immunoglobulin M antibody capture–enzyme-linked immunosorbent assay (MAC-ELISA) and viral RNA detection by reverse transcriptase (RT-PCR) can also be used to diagnose Dengue feve
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