what is the size of the bird flu virus?
144221
It looks like most viruses are from 0.01 to 0.001 microns.
1154187
People are worrying about it too much. The bird flu is genetically designed for birds. Only a couple hundred people have died from bird flu out of the millions who have had it.
92991
influenza is actually a single strand negative strand virus.\n\n\nand the genome is from 12,000 to 15,000 bases in length.
146647
Where we are: Since 2004 some 170 humans have been infected with bird flu, with about 90 fatalities, mostly in Asia, according to the World Health Organization.\n\nBackground: With the flu spreading around the world, the virus has turned up in birds in Asia and Europe, and, most recently, Africa. So far, bird flu has only been passed from birds either to other birds or, in isolated cases, to humans. However, if the flu mutates into a strain that can pass from human to human, people will have no immunity and the flu will probably pass rapidly from person to person, creating a pandemic. Flu vaccines can only be made to protect against a particular virus, and, since the virus has yet to be passed from human to human, no vaccine can be developed.\n\nIn Asia, many people live with ducks and chickens in their homes and in their yards. Health and veterinary officials worldwide recently announced that a key way to stop the spread of the disease is to improve farming practices, segregating poultry from humans, and culling birds that have been infected with the deadly virus.\n\nWhat's next? When asked for predictions as to the seriousness of the pandemic, should one occur, experts have based their projections on a similar pandemic that occurred in 1918-1919. Up to a billion people fell ill, and nearly 100 million died worldwide. Translating to today's figures, they project that some 30-60 percent of the world's population could be infected by the virus, and over 300 million people worldwide could die. In the meantime, good hygiene remains the best prevention: keep hands well-washed, and avoid contact with people who have been infected with the virus.
299242
While prior H5N1 strains have been known, they were significantly different from the current H5N1 strain on a genetic level, making the global spread of this new strain unprecedented. The current H5N1 strain is a fast-mutating, highly pathogenic avian influenza virus (HPAI) found in multiple bird species.\n\nCountries that have reported one or more major H5N1 outbreaks in birds (causing at least thousands but in some cases millions of dead birds) are (in order of first outbreak occurrence): Korea, Vietnam, Japan, Thailand, Cambodia, Laos, Indonesia, China, Malaysia, Russia, Kazakhstan, Mongolia, Turkey, Romania, Croatia, Ukraine, Cyprus, Iraq, Nigeria, Egypt, India, France, Niger, Bosnia, Azerbaijan, Albania, Cameroon, Myanmar, Afghanistan, Israel, Pakistan, Jordan, Burkina Faso, Germany, Sudan. H5N1 has been found in birds in the wild in numerous other countries: Austria, Bulgaria, Czech Republic, Denmark, Greece, Hungary, Iran, Italy, Kuwait, Poland, Serbia and Montenegro, Slovakia, Slovenia, Sweden, Switzerland, United Kingdom. Countries with massive bird die offs that do not confirm H5N1 include: Ethiopia.\n\nBird flu is any flu caused by a virus adapted to birds.\n\nIt is also called avian flu, avian influenza and bird influenza.\n\nThe only known such viruses are Influenza A viruses. All subtypes (but not all strains of all subtypes) of this species are adapted to birds, so for many purposes avian flu virus is Influenza A virus (the "A" does not stand for "avian").\n\nHowever most people use "avian flu" to mean H5N1 which is the subtype of the species Influenza A virus that is the world's major flu pandemic threat.\n\nSo "avian flu", "bird flu", "avian influenza", and "bird influenza" all mean the same thing; but are all used to mean these very different things:\n\n    * flu:\n          o flu from Influenza A viruses which are adapted to birds (the technically correct meaning)\n          o the flu acquired from any Influenza A viruses\n          o the H5N1 flu (flu acquired from H5N1)\n    * virus:\n          o Influenza A viruses which are adapted to birds\n          o the Influenza A viruses\n          o the H5N1 subtype of the Influenza A virus.
167865
You do not have bird flu, because if you did, you would not be sitting here typing.  Bird Flu is a very aggressive virus. It will take you down like a buffalo full of twenty-odd buckshot.
1111305
Avian flu (also "bird flu", "avian influenza", etc), technically means "flu from Influenza A viruses that have adapted to birds", but is sometimes mistakenly used to refer to flu from any Influenza A viruses (rather than ones adapted to birds, e.g. Dog flu, Horse flu, Human flu, Swine flu), or (also incorrectly) even the virus itself. [1] [2] [3] [4] [5] [6] [7]\n\nThe only known "avian flu" viruses are Influenzavirus A. All subtypes (but not all strains of all subtypes) of Influenza A are adapted to birds, which is why for many purposes avian flu virus is the Influenza A virus (note that the "A" does not stand for "avian").\n\nAs of 2006, "avian flu" is being commonly used to refer to a particular subtype of Influenza A, H5N1, which is currently the world's major flu pandemic threat.\n\nA few examples of correct and incorrect usage of the term "avian flu" itself follow. For more scientific information about avian flu, see the subtype links towards the bottom of this article.\nIn technical contexts, correct usage of terms is necessary because precise distinctions are the essence of the communication.\n\n"Avian influenza strains are those well adapted to birds" [1] \n"An outbreak of influenza A (H5N1), also known as 'avian flu' or 'bird flu,' has been reported in several countries throughout Asia." [8] \n"Avian influenza virus usually refers to influenza A viruses found chiefly in birds, but infections can occur in humans."[9] \n"Of the few avian influenza viruses that have crossed the species barrier to infect humans, H5N1 has caused the largest number of cases of severe disease and death in humans. Unlike normal seasonal influenza, where infection causes only mild respiratory symptoms in most people, the disease caused by H5N1 follows an unusually aggressive clinical course, with rapid deterioration and high fatality." Seasonal influenza is human flu.[10] \n"avian influenza HA bind alpha 2-3 sialic acid receptors while human influenza HA bind alpha 2-6 sialic acid receptors. Swine influenza viruses have the ability to bind both types of sialic acid receptors." [11] \nSometimes a virus contains both avian adapted genes and human adapted genes. Both the H2N2 and H3N2 pandemic strains contained avian flu virus RNA segments. "While the pandemic human influenza viruses of 1957 (H2N2) and 1968 (H3N2) clearly arose through reassortment between human and avian viruses, the influenza virus causing the 'Spanish flu' in 1918 appears to be entirely derived from an avian source (Belshe 2005)." [2] \n[edit]\nIllustrative examples of imprecise usage\nIn nontechnical contexts, imprecise usage of terms is typical when discussing complex things.\n\n"A 1,000 square mile quarantine zone to combat an outbreak of bird flu was lifted in Scotland today - despite the spread of a similar disease south of the border." Here "bird flu" is used to mean "Asian lineage HPAI A(H5N1) flu" (which is a bird flu) and contrasted with flu from an avian adapted strain of H7N3 (which is also a bird flu). (Click the links for details.) [12]
1057059
The influence on virus replication in culture of the presence and location of glycosylation sites on the haemagglutinin (HA) glycoprotein of avian influenza viruses and differences in length of the stalk region of their neuraminidase (NA) glycoprotein was examined using reassortant viruses. Plaque size was measured in the presence or absence of bacterial neuraminidase (CPNA) and/or an influenza virus NA inhibitor, zanamivir, to assess the relative contribution of the NA to replication efficiency in tissue culture. The following conclusions were drawn, (1) HA lacking glycosylation at 158 gives inefficient growth when combined with short-stalked NAs, and efficient growth when combined with long-stalked NAs. (2) Glycosylation at 158 of HA makes the virus less dependent on NA for release from its receptors. (3) HA with glycosylation at 158 gives efficient growth when combined with short-stalked NAs but, when combined with long-stalked NAs, growth is very efficient and excess NA activity is disadvantageous. (4) HA having glycosylation at 158 combined with short-stalked NAs, or HA lacking glycosylation at 158 combined with long-stalked NAs may represent optimal combinations. The results reinforce the importance of a balance of HA and NA activity for efficient virus exit from, and entry into cells
323958
Avian influenza in birds\nAvian influenza is an infection caused by avian (bird) influenza (flu) viruses. These influenza viruses occur naturally among birds. Wild birds worldwide carry the viruses in their intestines, but usually do not get sick from them. However, avian influenza is very contagious among birds and can make some domesticated birds, including chickens, ducks, and turkeys, very sick and kill them.\n\nInfected birds shed influenza virus in their saliva, nasal secretions, and feces. Susceptible birds become infected when they have contact with contaminated secretions or excretions or with surfaces that are contaminated with secretions or excretions from infected birds. Domesticated birds may become infected with avian influenza virus through direct contact with infected waterfowl or other infected poultry, or through contact with surfaces (such as dirt or cages) or materials (such as water or feed) that have been contaminated with the virus.\n\nInfection with avian influenza viruses in domestic poultry causes two main forms of disease that are distinguished by low and high extremes of virulence. The “low pathogenic” form may go undetected and usually causes only mild symptoms (such as ruffled feathers and a drop in egg production). However, the highly pathogenic form spreads more rapidly through flocks of poultry. This form may cause disease that affects multiple internal organs and has a mortality rate that can reach 90-100% often within 48 hours.\n\nAvian Influenza A (H5N1)\nInfluenza A (H5N1) virus – also called “H5N1 virus” – is an influenza A virus subtype that occurs mainly in birds, is highly contagious among birds, and can be deadly to them. H5N1 virus does not usually infect people, but infections with these viruses have occurred in humans. Most of these cases have resulted from people having direct or close contact with H5N1-infected poultry or H5N1-contaminated surfaces.
268476
Avian influenza is an infection caused by avian (bird) influenza (flu) viruses. These influenza viruses occur naturally among birds. Wild birds worldwide carry the viruses in their intestines, but usually do not get sick from them. However, avian influenza is very contagious among birds and can make some domesticated birds, including chickens, ducks, and turkeys, very sick and kill them.\n\nInfected birds shed influenza virus in their saliva, nasal secretions, and feces. Susceptible birds become infected when they have contact with contaminated secretions or excretions or with surfaces that are contaminated with secretions or excretions from infected birds. Domesticated birds may become infected with avian influenza virus through direct contact with infected waterfowl or other infected poultry, or through contact with surfaces (such as dirt or cages) or materials (such as water or feed) that have been contaminated with the virus.\n\nInfection with avian influenza viruses in domestic poultry causes two main forms of disease that are distinguished by low and high extremes of virulence. The “low pathogenic” form may go undetected and usually causes only mild symptoms (such as ruffled feathers and a drop in egg production). However, the highly pathogenic form spreads more rapidly through flocks of poultry. This form may cause disease that affects multiple internal organs and has a mortality rate that can reach 90-100% often within 48 hours.\n\nHuman infection with avian influenza viruses\nThere are many different subtypes of type A influenza viruses. These subtypes differ because of changes in certain proteins on the surface of the influenza A virus (hemagglutinin [HA] and neuraminidase [NA] proteins). There are 16 known HA subtypes and 9 known NA subtypes of influenza A viruses. Many different combinations of HA and NA proteins are possible. Each combination represents a different subtype. All known subtypes of influenza A viruses can be found in birds.\n\nUsually, “avian influenza virus” refers to influenza A viruses found chiefly in birds, but infections with these viruses can occur in humans. The risk from avian influenza is generally low to most people, because the viruses do not usually infect humans. However, confirmed cases of human infection from several subtypes of avian influenza infection have been reported since 1997. Most cases of avian influenza infection in humans have resulted from contact with infected poultry (e.g., domesticated chicken, ducks, and turkeys) or surfaces contaminated with secretion/excretions from infected birds. The spread of avian influenza viruses from one ill person to another has been reported very rarely, and transmission has not been observed to continue beyond one person.\n\n“Human influenza virus” usually refers to those subtypes that spread widely among humans. There are only three known A subtypes of influenza viruses (H1N1, H1N2, and H3N2) currently circulating among humans. It is likely that some genetic parts of current human influenza A viruses came from birds originally. Influenza A viruses are constantly changing, and they might adapt over time to infect and spread among humans.\n\nDuring an outbreak of avian influenza among poultry, there is a possible risk to people who have contact with infected birds or surfaces that have been contaminated with secretions or excretions from infected birds.\n\nSymptoms of avian influenza in humans have ranged from typical human influenza-like symptoms (e.g., fever, cough, sore throat, and muscle aches) to eye infections, pneumonia, severe respiratory diseases (such as acute respiratory distress), and other severe and life-threatening complications. The symptoms of avian influenza may depend on which virus caused the infection.\n\nStudies done in laboratories suggest that some of the prescription medicines approved in the United States for human influenza viruses should work in treating avian influenza infection in humans. However, i
697670
2.5 cm if you are a mouse\n2.5 m if you are human\n25 m if you are a large passenger aircraft
674911
Avian influenza (also known as bird flu, avian flu, influenzavirus A flu, type A flu, or genus A flu) is a flu due to a type of influenza virus that is hosted by birds, but may infect several species of mammals. It was first identified in Serbia Montenegro in the early 1900s and is now known to exist worldwide. A strain of the H5N1-type of avian influenzavirus that emerged in 1997 has been identified as the most likely source of a future influenza pandemic. \n\nAvian influenza viruses compose the Influenzavirus A genus of the Orthomyxoviridae family and are negative sense, single-stranded, segmented RNA viruses. "Influenza viruses are further categorised into subtypes according to the antigens of the haemagglutinin (H) and neuraminidase (N) projections on their surfaces. There are 15 haemagglutinin subtypes and 9 neuraminidase subtypes of influenza A viruses, and AI [avian influenza] viruses have representatives in all of these subtypes. However, to date all highly pathogenic AI [avian influenza] viruses that cause generalised rather than respiratory disease belong to either the H5 or H7 subtypes. For example, the classical fowl plague virus is H7N7 and the virus responsible for the major epidemic in the eastern United States in 1983 84 was H5N2" Avian Influenza - Disease Card October 21st, 2005 InfectionStrains of avian influenzavirus may infect various type of animals, including birds, pigs, horses, seals, whales and humans. However, wild fowl act as natural asymptomatic carriers, spreading it to more susceptible domestic stocks. Avian influenzavirus spreads in the air and in manure. It can also be transmitted by contaminated feed, water, equipment and clothing; however, there is no evidence that the virus can survive in well cooked meat. The incubation period is 3 to 5 days. Symptoms in animals vary, but virulent strains can cause death within a few days. This was first founded in the 1900s. \n\n"Influenza A viruses normally seen in one species sometimes can cross over and cause illness in another species. For example, until 1998, only H1N1 viruses circulated widely in the U.S. pig population. However, in 1998, H3N2 viruses from humans were introduced into the pig population and caused widespread disease among pigs. Most recently, H3N8 viruses from horses have crossed over and caused outbreaks in dogs." [1] \n\nIn humans, avian flu viruses cause similar symptoms to other types of flu. [2] These include fever, cough, sore throat, muscle aches, conjunctivitis and, in severe cases, severe breathing problems and pneumonia that may be fatal. The severity of the infection will depend to a large part on the state of the infected person's immune system and if the victim has been exposed to the strain before, and is therefore partially immune. In one case, a boy with H5N1 experienced diarrhea followed rapidly by a coma without developing respiratory or flu-like symptoms, suggesting non-standard symptoms. [3] Subtypes pathogenic to humansAll avian influenza (AI) viruses are type A influenzavirus in the virus family of Orthomyxoviridae and all known strains of influenza A virus infect birds. Influenzavirus type A is subdivided into subtypes based on hemagglutinin (H) and neuraminidase (N) protein spikes from the central virus core. There are 16 H types, each with up to 9 N subtypes, yielding a potential for 144 different H and N combinations. \n\nIn addition, avian influenza viruses may fall into one of 2 pathotypes: low (LPAI) and high (HPAI) pathogenicity, based on their virulence in poultry populations. Avian influenzavirus H5 and H7 strains are found in both "low pathogenic” or “high pathogenic” forms; influenza H9 virus has been identified only in a “low pathogenic” form. \n\nIt is feared that if a strain of avian influenza virus to which humans have not been previously exposed undergoes antigenic shift to the point where it can cross the species barrier from birds to humans, the new subtype
172490
Human flu symptoms are:\n\n    * fever\n    * cough\n    * sore throat\n    * muscle aches\n    * conjunctivitis\n\nCases of bird flu are more likely to cause breathing problems and pneumonia, and can be fatal.
75974
Avian influenza is an infection caused by avian (bird) influenza (flu) viruses. These influenza viruses occur naturally among birds. Wild birds worldwide carry the viruses in their intestines, but usually do not get sick from them. However, avian influenza is very contagious among birds and can make some domesticated birds, including chickens, ducks, and turkeys, very sick and kill them.\n\nInfected birds shed influenza virus in their saliva, nasal secretions, and feces. Susceptible birds become infected when they have contact with contaminated secretions or excretions or with surfaces that are contaminated with secretions or excretions from infected birds. Domesticated birds may become infected with avian influenza virus through direct contact with infected waterfowl or other infected poultry, or through contact with surfaces (such as dirt or cages) or materials (such as water or feed) that have been contaminated with the virus.\n\nInfection with avian influenza viruses in domestic poultry causes two main forms of disease that are distinguished by low and high extremes of virulence. The “low pathogenic” form may go undetected and usually causes only mild symptoms (such as ruffled feathers and a drop in egg production). However, the highly pathogenic form spreads more rapidly through flocks of poultry. This form may cause disease that affects multiple internal organs and has a mortality rate that can reach 90-100% often within 48 hours.\nHuman infection with avian influenza viruses\n\nThere are many different subtypes of type A influenza viruses. These subtypes differ because of changes in certain proteins on the surface of the influenza A virus (hemagglutinin [HA] and neuraminidase [NA] proteins). There are 16 known HA subtypes and 9 known NA subtypes of influenza A viruses. Many different combinations of HA and NA proteins are possible. Each combination represents a different subtype. All known subtypes of influenza A viruses can be found in birds.\n\nUsually, “avian influenza virus” refers to influenza A viruses found chiefly in birds, but infections with these viruses can occur in humans. The risk from avian influenza is generally low to most people, because the viruses do not usually infect humans. However, confirmed cases of human infection from several subtypes of avian influenza infection have been reported since 1997. Most cases of avian influenza infection in humans have resulted from contact with infected poultry (e.g., domesticated chicken, ducks, and turkeys) or surfaces contaminated with secretion/excretions from infected birds. The spread of avian influenza viruses from one ill person to another has been reported very rarely, and transmission has not been observed to continue beyond one person.\n\n“Human influenza virus” usually refers to those subtypes that spread widely among humans. There are only three known A subtypes of influenza viruses (H1N1, H1N2, and H3N2) currently circulating among humans. It is likely that some genetic parts of current human influenza A viruses came from birds originally. Influenza A viruses are constantly changing, and they might adapt over time to infect and spread among humans.\n\nDuring an outbreak of avian influenza among poultry, there is a possible risk to people who have contact with infected birds or surfaces that have been contaminated with secretions or excretions from infected birds.\n\nSymptoms of avian influenza in humans have ranged from typical human influenza-like symptoms (e.g., fever, cough, sore throat, and muscle aches) to eye infections, pneumonia, severe respiratory diseases (such as acute respiratory distress), and other severe and life-threatening complications. The symptoms of avian influenza may depend on which virus caused the infection.
581488
This is commonly known as the Avian Flu virus or Bird Flu....
118263
Incubation periods\nThe new report says the virus may incubate longer than other human flu viruses before causing symptoms. Incubation periods in ordinary flu range from 1 to 4 days, with an average of 2 days. \n\nIn bird flu cases, the incubation time has mostly been from 2 to 4 days but has stretched to 8 days, the report says. In household clusters of cases, the time between cases has generally ranged from 2 to 5 days but sometimes has been as long as 17 days.\n\nyou might wanna get some more info about the bird flu through these sites: http://bird-flu-symptom.info/category/symptoms/\nwww.agnr.umd.edu/avianflu/
120313
So far bird flu is not contagious from human to human.  So unless someone brings home a flock of chickens, I don't think you have much to worry about.