Rapid Influenza A+B Testing positive/negative

Rapid Influenza A+B Testing positive/negative

Get Rapid Influenza (Flu) tested with results in as little as 15 minutes in the comfort and privacy of your home or private office. 

Rapid influenza diagnostic tests (RIDTs) are immunoassays that can identify the presence of influenza A and B viral nucleoprotein antigens in respiratory specimens, and display the result in a qualitative way (positive vs. negative)

Positive result

  • A positive result means that the test detected influenza viral antigen, but does not necessarily mean the patient is contagious.
  • The positive predictive value of a test (the proportion of patients with positive results who have influenza) is highest when influenza activity is high in the population being tested (e.g. community).
  • A positive result is most likely a true positive result if the respiratory specimen was collected close to illness onset (within 4 days) during periods of high influenza activity (e.g. winter) in the population being tested (e.g. community).

Negative result

  • A negative result means that the test did not detect any influenza viral antigen.
  • The negative predictive value of a test (the proportion of patients with negative results who do not have influenza) is highest when influenza activity is low in the population being tested (e.g. community).
  • A negative result is most likely a true negative result if the respiratory specimen was collected close to illness onset (within 4 days) during periods of low influenza activity (e.g. summer) in the population being tested (e.g. community).

 

Negative results of tests do not exclude influenza virus infection and influenza should still be considered if clinical suspicion is high based upon history, signs, symptoms and clinical examination. Because Sensitivities fall below  Specificity levels, when compared to Rt-PCR, both false negative results occur more commonly than false positive results. 

We have obtained CLIA waivers to perform this type of testing. It's important to know that a negative Rapid Flu test does NOT rule out Flu infection.  If you develop signs or worsening of symptoms consistent with Flu following a negative RAPID test, we recommend you contact us or your medical provider and seek additional testing to confirm the diagnosis and may need additional treatment.

 



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