A new computer model could help scientists predict when a particular strain of avian influenza might become infectious from bird to human, according to a report to be published in the International Journal Data Mining an ...
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Earlier this month, the U.S. government declared that the emerging H7N9 bird flu "poses a significant potential for a public health emergency." The virus, a relative of other bird flus we've seen previously ...
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(Medical Xpress)—Flu is unpredictable. Influenza viruses are constantly changing—from one season to the next or even within the course of a flu season—making vaccine development difficult.
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The over-the-counter anti-inflammatory drug naproxen may also exhibit antiviral activity against influenza A virus, according to a team of French scientists. The finding, the result of a structure-based investigation, is ...
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Researchers have successfully applied a novel method of vaccine creation for Chikungunya virus (CHIKV) using a technique called large scale random codon re-encoding. Using this approach, a group from the UMR_D 190, Emerging ...
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(Medical Xpress)—Influenza, commonly known as the flu, has distinct transmission patterns around the world. In temperate regions, influenza's occurrence peaks during the winter season, while in some tropical regions, the ...
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More than 80 percent of pigs that tested positive for influenza A virus at Ohio county fairs between 2009 and 2011 showed no signs of illness, according to a new study.
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(HealthDay)—The only thing predictable about the flu is its unpredictability, U.S. health officials said Thursday, as they urged virtually all Americans to get vaccinated for the coming season.
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(Medical Xpress)—A team of researchers, led by scientists at the University of Rochester, has identified a location in a gene of the influenza A virus that could be used as a "switch" for disrupting replication ...
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A close collaboration between scientists from the Experimental Therapeutics Centre (ETC) under the Agency for Science and Technology Research (A*STAR) and clinicians from Tan Tock Seng Hospital (TTSH) has enabled the successful ...
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The H1N1 flu pandemic in 2009 underscored weaknesses in methods widely used to diagnose the flu, from frequent false negatives to long wait times for results. Now Boston University researchers have developed ...
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(Medical Xpress) -- For a virus like influenza, the key to success isn't in overpowering the immune system, it’s in tricking it. A team of researchers led by scientists at The Rockefeller University has ...
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A new study conducted by researchers from McGill University, the Research Institute of the McGill University Health Centre (RI MUHC), and Sainte-Justine University Hospital Research Centre, Montreal, has put the accuracy ...
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As people age, their immune system becomes less robust. This makes them more susceptible to serious and frequently life-threatening infections with viruses that affect the respiratory tract such as influenza A virus (IAV). ...
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Guided by insights into how mice recover after H1N1 flu, researchers at Harvard Medical School and Brigham and Women's Hospital, together with researchers at A*STAR of Singapore, have cloned three distinct ...
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Influenzavirus A Influenzavirus B Influenzavirus C Isavirus Thogotovirus
Influenzavirus A is a genus of the Orthomyxoviridae family of viruses. Influenzavirus A includes only one species: Influenza A virus which causes influenza in birds and some mammals. Strains of all subtypes of influenza A virus have been isolated from wild birds, although disease is uncommon. Some isolates of influenza A virus cause severe disease both in domestic poultry and, rarely, in humans. Occasionally viruses are transmitted from wild aquatic birds to domestic poultry and this may cause an outbreak or give rise to human influenza pandemics.
Influenza A viruses are negative sense, single-stranded, segmented RNA viruses. There are several subtypes, labeled according to an H number (for the type of hemagglutinin) and an N number (for the type of neuraminidase). There are 16 different H antigens (H1 to H16) and nine different N antigens (N1 to N9). The newest H type (H16) was isolated from black-headed gulls caught in Sweden and the Netherlands in 1999 and reported in the literature in 2005.
Each virus subtype has mutated into a variety of strains with differing pathogenic profiles; some pathogenic to one species but not others, some pathogenic to multiple species.
This text uses material from Wikipedia licensed under CC BY-SA
