h1n1+swine+flu - For More Lectures...

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Unformatted text preview: For More Lectures www.medicalppt.blogspot.com 2009 H1N1 Info gathered by Mona Youssef DISTRIBUTED BY www.medicalppt.blogspot.com For More Lectures www.medicalppt.blogspot.com Study has shown virus to be different from the normally circulating North American pig virus. It has two genes from flu viruses that normally circulate in pigs in Europe and Asia , avian genes and human genes. "quadruple reassortant" virus How is it then that it made its first appearance in Mexico and the US? For More Lectures www.medicalppt.blogspot.com Genomic mapping of the virus revealed that it has been present and circulating in pigs for the past 7.5 to ten years (obviously undetected due to laxity in surveillance of pigs). For More Lectures www.medicalppt.blogspot.com Charecteristics Influenza virus can survive on environmental surfaces and remain infectious for up to 2-8 hours after being deposited on the surface. Virus is destroyed by : o heat 75-100 degrees Celcius. o chemical germicides : chlorine, hydrogen peroxide, detergents (soap), iodophors (iodine-based antiseptics), and alcohols. *wipes or gels with alcohol in them should be rubbed into hands until they are dry. A person can sneeze on someones luggage in an airport, and start an outbreak in a country without even entering it! For More Lectures www.medicalppt.blogspot.com Swine flu virus (Not novel H1N1) Like all influenza viruses, swine flu viruses change constantly. Pigs can be infected by avian influenza and human influenza viruses as well as swine influenza viruses. When influenza viruses from different species infect pigs, the viruses can reassort (i.e. swap genes) and new viruses that are a mix of swine, human and/or avian influenza viruses can emerge. Over the years, different variations of swine flu viruses have emerged. There are currently four main influenza type A virus subtypes that have been isolated in pigs: H1N1, H1N2, H3N2, and H3N1. Most of the recently isolated influenza viruses from pigs have been H1N1 viruses. H3 subtypes infect older population and tend to be more severe . For More Lectures www.medicalppt.blogspot.com Drinking water? No completed research for novel H1N1 virus. Free chlorine levels typically used in drinking water treatment are adequate to inactivate highly pathogenic H5N1 avian influenza. It is likely that other influenza viruses such as novel H1N1 would also be similarly inactivated by chlorination. For More Lectures www.medicalppt.blogspot.com Swimming Pools No completed research for novel H1N1 virus. Free chlorine levels recommended by CDC (13 parts per million [ppm or mg/L] for pools and 25 ppm for spas) are adequate to disinfect avian influenza A (H5N1) virus....
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h1n1+swine+flu - For More Lectures...

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