Related topics: virus , bird flu
Influenza A virus subtype H5N1
hideInfluenza A virus subtype H5N1, also known as "bird flu," A(H5N1) or simply H5N1, is a subtype of the Influenza A virus which can cause illness in humans and many other animal species. A bird-adapted strain of H5N1, called HPAI A(H5N1) for "highly pathogenic avian influenza virus of type A of subtype H5N1", is the causative agent of H5N1 flu, commonly known as "avian influenza" or "bird flu". It is enzootic in many bird populations, especially in Southeast Asia. One strain of HPAI A(H5N1) is spreading globally after first appearing in Asia. It is epizootic (an epidemic in nonhumans) and panzootic (affecting animals of many species, especially over a wide area), killing tens of millions of birds and spurring the culling of hundreds of millions of others to stem its spread. Most references to "bird flu" and H5N1 in the popular media refer to this strain.
According to the FAO Avian Influenza Disease Emergency Situation Update, H5N1 pathogenicity is continuing to gradually rise in endemic areas but the avian influenza disease situation in farmed birds is being held in check by vaccination. Eleven outbreaks of H5N1 were reported worldwide in June 2008 in five countries (China, Egypt, Indonesia, Pakistan and Vietnam) compared to 65 outbreaks in June 2006 and 55 in June 2007. The "global HPAI situation can be said to have improved markedly in the first half of 2008 [but] cases of HPAI are still underestimated and underreported in many countries because of limitations in country disease surveillance systems".
For more information about Influenza A virus subtype H5N1, read the full article at
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News tagged with h5n1
Novel pandemic flu vaccine effective against H5N1 in mice
Mar 01, 2009 |
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Vaccines against H5N1 influenza will be critical in countering a possible future pandemic. Yet public health experts agree that the current method of growing seasonal influenza vaccines in chicken eggs is slow and inefficient.
Scientists identify human monoclonal antibodies effective against bird and seasonal flu viruses
Biology /
Feb 22, 2009 |
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Researchers at the Dana-Farber Cancer Institute, Burnham Institute for Medical Research and the Centers for Disease Control and Prevention have reported the identification of human monoclonal antibodies (mAb) that neutralize ...
Scientists put interactive flu tracking at public's fingertips
Nov 16, 2009 |
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New methods of studying avian influenza strains and visually mapping their movement around the world will help scientists more quickly learn the behavior of the pandemic H1N1 flu virus, Ohio State University ...
Avian influenza strain primes brain for Parkinson's disease
Aug 10, 2009 |
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At least one strain of the H5N1 avian influenza virus leaves survivors at significantly increased risk for Parkinson's disease and possibly other neurological problems later in life, according to new research from St. Jude ...
Study: Indirect transmission can trigger influenza outbreaks in birds
Jun 02, 2009 |
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New data on the persistence of avian influenza viruses in the environment has allowed a team of University of Georgia researchers to create the first model that takes into account both direct and indirect transmission of ...
HIV's march around Europe mapped
Medicine & Health / HIV & AIDS
May 20, 2009 |
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Those travelling abroad should take seriously advice to pack their condoms and keep their needles to themselves: research published today in the open access journal Retrovirology shows that tourists, travel ...
Human nose too cold for bird flu, says new study
May 15, 2009 |
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(PhysOrg.com) -- Avian influenza viruses do not thrive in humans because the temperature inside a person's nose is too low, according to research published today in the journal PLoS Pathogens. The authors of the ...
Swine flu goes person-to-pig; could it jump back?
May 04, 2009 |
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(AP) -- Now that the swine flu virus has passed from a farmworker to pigs, could it jump back to people? The question is important, because crossing species again could make it more deadly.
Health authorities rush to tackle killer flu in US, Mexico
Apr 24, 2009 |
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World health authorities on Friday rushed to tackle flu outbreaks in the United States and Mexico that have killed at least 60 people and have pandemic potential.
Bird flu found in Tibet: state media
Apr 19, 2009 |
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Chinese officials had confirmed the outbreak of a deadly strain of bird flu among poultry in the Tibetan capital Lhasa, state media reported Sunday, quoting the ministry of agriculture.
Deadly bird flu virus found in wild goose in Germany
Mar 10, 2009 |
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German authorities have discovered the first case of the deadly H5N1 bird flu virus this year, the European Commission announced Tuesday.
Shades of 1918? New study compares avian flu with a notorious killer from the past
Biology /
Feb 10, 2009 |
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In the waning months of the First World War, a lethal virus known as the Spanish flu (influenza A, subtype H1N1), swept the United States, Europe and Asia in three convulsive waves. The year was 1918. The ...
New 3-D structural model of critical H1N1 protein developed
May 22, 2009 |
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Singapore scientists report an evolutionary analysis of a critical protein produced by the 2009 H1N1 influenza A virus strain in Biology Direct journal's May 20 issue.
Glaxo offers WHO 50 million pandemic vaccines
Medicine & Health / Medications
May 19, 2009 |
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(AP) -- Drug giant GlaxoSmithKline said it has offered to donate 50 million doses of a pandemic vaccine to the World Health Organization in the event of a global flu outbreak, according to a company spokesman.
New vaccine strategy might offer protection against pandemic influenza strains
May 18, 2009 |
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A novel vaccine strategy using virus-like particles (VLPs) could provide stronger and longer-lasting influenza vaccines with a significantly shorter development and production time than current ones, allowing public health ...
