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    tiadesai's Avatar
    tiadesai Posts: 3, Reputation: 3
    New Member

    Aug 31, 2005, 01:35 PM
    Bird Flu
    What is avian influenza (bird flu)?

    Bird flu is an infection caused by avian (bird) influenza (flu) viruses. These flu viruses occur naturally among birds. Wild birds worldwide carry the viruses in their intestines, but usually do not get sick from them. However, bird flu is very contagious among birds and can make some domesticated birds, including chickens, ducks, and turkeys, very sick and kill them.
    Do bird flu viruses infect humans?

    Bird flu viruses do not usually infect humans, but several cases of human infection with bird flu viruses have occurred since 1997.
    How are bird flu viruses different from human flu viruses? Updated March 18

    There are many different subtypes of type A flu viruses. These subtypes differ because of certain proteins on the surface of the flu A virus (hemagglutinin [HA] and neuraminidase [NA] proteins). There are 16 different HA subtypes and 9 different NA subtypes of flu A viruses. Many different combinations of HA and NA proteins are possible. Each combination is a different subtype. All subtypes of flu A viruses can be found in birds. However, when we talk about “bird flu” viruses, we are referring to those flu A subtypes that continue to occur mainly in birds. They do not usually infect humans, even though we know they can do so. When we talk about “human flu viruses” we are referring to those subtypes that occur widely in humans. There are only three known subtypes of human flu viruses (H1N1, H1N2, and H3N2); it is likely that some genetic parts of current human flu A viruses came from birds originally. Flu A viruses are constantly changing, and they might adapt over time to infect and spread among humans.

    For more information on this topic you can click on Bird Flu Relenza
    fredg's Avatar
    fredg Posts: 4,926, Reputation: 674
    Ultra Member

    Sep 6, 2005, 06:59 AM
    Bird Flu
    For some good research on the difference between Human Flu and Bird Flu, try using Google.
    I guess that was your question.
    Best wishes,

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