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Influenza (cont.)

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How do health care professionals diagnose the flu (influenza)?

The flu is presumptively diagnosed clinically by the patient's history of association with people known to have the disease and their symptoms listed above. Usually, a quick test (for example, nasopharyngeal swab sample) is done to see if the patient is infected with influenza A or B virus. Most of the tests can distinguish between A and B types. The test can be negative (no flu infection) or positive for types A or B. If it is positive for type A, the person could have a conventional flu strain or a potentially more aggressive strain such as H1N1. Most of the rapid tests are based on PCR technology that identifies the genetic material of the virus. Some rapid influenza diagnostic tests (RIDTs) can screen for influenza in about 10-30 minutes.

Swine flu (H1N1) and other influenza strains like bird flu or H3N2 are definitively diagnosed by identifying the particular surface proteins or genetic material associated with the virus strain. In general, this testing is done in a specialized laboratory. However, doctors' offices are able to send specimens to specialized laboratories if necessary.

How does flu spread?

How can you get influenza?

Flu is easily spread from person to person both directly and indirectly. The influenza virus can spread to other people in droplets contaminated with the virus. Produced by coughing, sneezing, or even talking, these droplets land near or in the mouth or the nose of uninfected people, and the disease may spread to them. The disease can spread indirectly to others if contaminated droplets land on utensils, dishes, clothing, or almost any surface and then are touched by uninfected people. If the infected person touches their nose or mouth, for example, they transfer or spread the disease to themselves or others.

Medically Reviewed by a Doctor on 9/29/2017

Source: MedicineNet.com
https://www.medicinenet.com/influenza/article.htm

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