Swine influenza
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This article is about influenza viruses in pigs. For the 2009 outbreak, see 2009 flu pandemic. For the 2009 human virus, see Pandemic H1N1/09 virus. Influenza (Flu) | | Types | * Avian * A/H5N1 subtype * Canine * Equine * Swine * A/H1N1 subtype | Vaccines | * 2009 pandemic * Pandemrix * Fluzone * Influvac * Live attenuated * Optaflu | Treatment | * Amantadine * Arbidol * Laninamivir * Oseltamivir * Peramivir * Rimantadine * Vitamin D * Zanamivir | Pandemics | * 2009 swine * 1968–1969 Hong Kong * 1918 | Outbreaks | * 2008 West Bengal * 2007 Bernard Matthews H5N1 * 2007 Australian equine * 2006 H5N1 India * 1976 swine flu | See also | * Flu season * Influenza evolution * Influenza research * Influenza-like illness * Vaccine reformulations | * v * t * e |
Electron microscope image of the reassorted H1N1 influenza virus photographed at the CDC Influenza Laboratory. The viruses are 80–120 nanometres in diameter.[1]
Swine influenza, also called pig influenza, swine flu, hog flu and pig flu, is an infection caused by any one of several types of swine influenzaviruses. Swine influenza virus (SIV) or swine-origin influenza virus (S-OIV) is any strain of the influenza family of viruses that is endemic inpigs.[2] As of 2009, the known SIV strains include influenza C and the subtypes of influenza A known as H1N1, H1N2, H2N1, H3N1, H3N2, andH2N3.
Swine influenza virus is common throughout pig populations worldwide. Transmission of the virus from pigs to humans is not common and does not always lead to human flu, often resulting only in the production of antibodies in the blood. If transmission does cause human flu, it is called zoonoticswine flu. People with regular exposure to pigs are at increased risk of