avian influenza

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avian influenza

a serious viral disease of many birds, both domestic (especially chickens, ducks, and turkeys) and wild. Wild birds act as reservoirs for influenza A virus (Orthomyxovirus); in birds, these viruses are responsible for clinical pictures ranging from low-grade illness to serious outbreaks with high mortality rates; signs range from reduced egg production to a fulminant peracute clinical course; respiratory signs (sinusitis, blood-stained nasal discharge) often occur in acute infections. Historically, close contact of fowl with humans has been shown epidemiologically to foster cross-species jump (avian to human) of new influenza strains (e.g., Hong Kong 1997 [AH5N1], Hong Kong 1999 [AH9N2]). New neuroaminidase and hemagglutinin subtypes develop as a result of antigenic drift, and less commonly, antigenic shift resulting in serious human influenza epidemics, and give rise to the need for annual reformulation of flu vaccines to protect against newer active strains. Currently 15 hemagglutinin and 9 neuraminidase subtypes have been identified in reservoir species.
Farlex Partner Medical Dictionary © Farlex 2012

avian influenza

A highly contagious viral infection that can infect commercial, wild, and pet birds, including chickens, turkeys, ducks, geese, parrots, and budgerigars. Of the 15 serotypes of bird flu, H5N1 is of greatest concern. The first human H5N1 cases were seen in Hong Kong in 1997, and were linked to close contact with live infected poultry or their saliva, fluids from their beaks, or their droppings, which can contaminate dust, soil, water, feed, equipment, vehicles, and clothing. Person-to-person spread is poorly documented and may not occur.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

a·vi·an in·flu·en·za

(ā'vē-ăn in'flū-en'ză)
A disease of birds due to strains of influenza A virus. Although wild birds, the natural hosts, seldom become sick when infected, avian influenza viruses can cause disease in domestic poultry and, rarely, in human beings. Transmission of the virus occurs through direct contact with an infected bird. The consequences of human infection vary from conjunctivitis and respiratory symptoms to severe systemic illness and death.
Synonym(s): bird flu.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

avian influenza

‘bird ‘flu’ caused by the H5N1 virus that caused epidemics in poultry in Japan, Korea, Thailand, China and Vietnam early in 2004. The virus is capable of spreading from birds to humans. By early 2005 there had been 44 known cases of H5N1 infection in humans with 32 deaths. There is serious concern that recombination with human influenza viruses may already have occurred raising the danger of human to human infection.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005


a community in England near the location where Newcastle disease was first observed.
Newcastle disease - an influenzalike disease of birds that is transmissible to man if in contact with diseased birds. Synonym(s): avian influenza; Ranikhet disease
Medical Eponyms © Farlex 2012

Patient discussion about avian influenza

Q. If the bird flu were to reach North America, how many people would it kill? How do you protect yourself & others? What can we do to protect ourselves against the Avian Flu which has officially begun to infect humans? How many will die?

A. It infected few people working with chickens, it can
T move around, so I wouldn’t worry too much. the chances of that happening is the same as a meteor hitting earth and destroying it, same as a nuclear war in the middle east that will wipe out half of humanity, same as all big disasters that can happen.
Unless it’s your job to worry about it (world health organization) – just try to live peaceful life.

More discussions about avian influenza
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References in periodicals archive ?
In my journal, I wrote: It's hard to imagine that the avian flu virus could possibly have a better environment in which to evolve into a pandemic virus than the one that it currently enjoys in Indonesia.
While the initial research will focus on how the avian flu virus is arranged genetically, Arzberger says the ultimate goal is to be able to have the computer infrastructure in place that will be applicable to a broader range of scientific inquiry.
Sixty-nine patients and staff at Ysbyty Gwynedd had been contacted because a patient, who is now discharged, was also being treated for the avian flu virus.
There has clearly beenalapseinbio-security, otherwise the avian flu virus would not have got into that poultry shed.
But it has now emerged the slaughter house it uses is only 30 miles from a goose farm where 13,000 birds had to be culled last month after an outbreak of the deadly avian flu virus.
The avian flu virus has killed about 164 people worldwide - mostly in Asia and the Middle East - since 2003.
Pathogen-free cells are critical for the rapid development of novel, cell-culture based vaccine production to help protect against the spread of influenza viruses among humans, including potentially the high pathogenicity H5N1 avian flu virus.
The new test, approved by the federal Food and Drug Administration in February, allows state scientists to test for the presence of the avian flu virus without having to send samples to another laboratory outside of New Hampshire.
Nemetz presented information on the influenza virus, what it does, how it changes and develops, why there is such concern about the Avian flu virus and how companies can provide a corporate medical response.
A standardized extract of black elderberry marketed under the name Sambucol has been found to fight the avian flu virus H5N1 in the laboratory, according to British researchers.
Because of the viruses' structure, if a person is simultaneously infected by both the avian flu and a human flu virus, it is possible that the two could swap genes, thereby creating an avian flu virus capable of spreading easily from person-to-person.
Vietnam has also been battling the avian flu virus, and after killing more than 50-million chickens and ducks and getting the disease under control through vaccination, the country's agricultural sector was hit by a huge outbreak of foot-and-mouth disease.

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