Virus de la influenza ah1n1 pdf file download

Influenza a h1n1, virus that is best known for causing widespread outbreaks, including epidemics and pandemics, of acute upper or lower respiratory tract infection. These images provide a 3d graphical representation of the biology and structure of a generic influenza virus, and are not specific to the 2009 h1n1 virus. Current subtypes of influenza a viruses that routinely circulate in people include. The english language content on this website is being archived for historic and reference purposes only. Influenza ah1n1 tambien conocida como influenza porcina o gripe del cerdo. Influenza a virus subtype h1n1 ah1n1 is the subtype of influenza a virus that was the most common cause of human influenza flu in 2009, and is associated with the 1918 spanish flu outbreak.

The strain designation for influenza virus types a, b, and c contains information on the antigenic type of the virus based on the antigenic specificity of the nucleoprotein, the host of origin for strains isolated from nonhuman sources, geographical origin, strain number, and year of isolation. Clinical characteristics and outcomes in children hospitalised with. Influenza suina influenza a virus h1n1 giant microbes. April, the causative virus was confirmed as being influenza a h1n1 of. Antigenic drift of the influenza ah1n1pdm09 virus neuraminidase. The h1n1 virus that caused that pandemic is now a regular human flu virus and continues to circulate seasonally worldwide. Emergence of a novel swineorigin influenza a h1n1 virus in humans.

However, just as the common, seasonal flu that affects humans is constantly mutating as our immune systems and vaccines compromise weaker strains, swine flu is always trying to improve itself so that it can become more virulent, spread faster and even associate with better company. The virus is contagious and can spread from human to. You may do so in any reasonable manner, but not in. Because this virus is very different from current seasonal influenza viruses, many people will not have protective immunity against it and the seasonal flu vaccine will not protect against it either.

The pandemic virus was first reported from mexico on 4 april 2009, and spread rapidly across the globe 1. For this reason, they are described as h1n1, h1n2 etc. Click here to download the 11 x 17 pdf file so that you can print and post it in your school, business, workplace, or residential setting. A birdadapted strain of h5n1, called hpai ah5n1 for highly pathogenic avian influenza virus of type a of subtype h5n1, is the highly pathogenic causative agent of h5n1 flu, commonly known as avian influenza bird flu. Pdf influenza is a highly contagious acute viral infection of the respiratory tract. Influenza ah1n1 pdm09 virus in pigs, reunion island article pdf available in emerging infectious diseases 1810.

The h1n1pdm09 virus was very different from h1n1 viruses that were circulating at the time of the pandemic. Spanish flu influenza a virus h1n1 there were four influenza pandemics in the last century. In 2009 a strain of swine flu called h1n1 infected many people around the world. Influenza is unpredictable, but this flu season could be worse than recent years because of the 2009 h1n1 virus. A revision of the system of nomenclature for influenza. Swine flu is an influenza virus that usually affects pigs. The 1918 spanish flu was the mother of all pandemics in two ways.

The influenza a h1n1 virus is a member of the family orthomyxoviridae a group of rna viruses. People do not normally get swine flu, but human infections can and do happen. The influenza virus belongs to orthomyxoviridae family. Files are available under licenses specified on their description page. Department of human services h1n1 resource center nj. Its genetic material is made up of eight separate segments. Antigenic drift of the influenza ah1n1pdm09 virus neuraminidase results in reduced. A and b which only infect humans and c which is uncommon. Influenza a virus subtype h5n1 ah5n1 is a subtype of the influenza a virus which can cause illness in humans and many other animal species. All structured data from the file and property namespaces is available under the creative commons cc0 license. Few young people had any existing immunity as detected by antibody response to the h1n1pdm09 virus, but nearly onethird of people over 60 years old had antibodies against this virus, likely from exposure to an older h1n1 virus earlier in their lives. Pdf influenza ah1n1 pdm09 virus in pigs, reunion island. It is an orthomyxovirus that contains the glycoproteins haemagglutinin and neuraminidase. For current, updated information on seasonal flu, including information about h1n1, see the cdc seasonal flu website.