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31 sie 2020 · A positive result of an antigen detection test (rapid influenza diagnostic test, immunofluorescence assay) or a molecular assay likely means that the patient has or has recently had influenza virus infection, but does not always mean that the patient is still infectious.
11 gru 2023 · Additional guidance is provided on when to test for influenza, how to interpret influenza testing results, what influenza laboratory tests are available, and influenza specimen collection. Guidance and resources for laboratory directors and staff are also available on this page.
5 cze 2024 · This guidance is intended for clinical laboratory and support staff who handle, or process specimens potentially containing Novel Influenza A viruses, including potential A (H5N1) viruses.
Results are available in 2–10 days using either shell-vial or standard cell-culture methods. Positive influenza cultures may or may not exhibit cytopathic effects, thus a second step to specifically identify influenza viruses by immunofluorescence, haemagglutination – inhibition (HI) or RT-PCR is needed. An advantage of culture is
25 wrz 2018 · Rapid antigen tests for influenza, here referred to as rapid influenza diagnostic tests (RIDTs), have been widely used for the diagnosis of influenza since their introduction in the 1990s due to their ease of use, rapid results, and suitability for point of care (POC) testing.
Laboratory tests for diagnosis of influenza include 4 aspects of examinations, virus culture and isolation, serological test, immunoassay, and molecular biological examination.
A positive result means you may have the flu. Your health care provider may prescribe medicine to help prevent flu complications. A negative result means you likely don't have the flu, and that some other virus is probably causing your symptoms. Your health care provider may order more tests before making a diagnosis.
