1. What virus is responsible for Bird flu?There are many subtypes of influenza “A” virus, which affect in a different way poultry, causing mild or serious diseases to birds.The most lethal subtype of influenza “A” virus is H5N1, also known to be very dangerous to humans.2. Why do we call the virus H5N1?On the surface of the virus are some proteins called Hemagglutinin (HA) and Neuraminidase (NA). Hemagglutinin allows the virus to initiate the infecting process and Neuraminidase prevents the newly formed virus from exiting the host cell. There exist 16 known HA subtypes and 9 NA subtypes of influenza virus. The H5N1 virus has in its structure hemagglutinin type 5 and neuraminidase type 1.3. Why must we worry about Bird flu?- H5N1 virus has caused by now millions of bird deaths, and hundreds of humans only in Asia;- If the virus mutates it will spread from human to human, causing a global pandemic;- Chicken industry will be seriously affected.4. How can H5N1 virus infect humans?Getting in close contact with an infected bird can lead to human contamination. People that take care, or sell in markets such infected birds, like chicken, turkey and ducks, inhale particles from dried excrements, or… Read full this story
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