Understanding avian influenza virus
Avian influenza is an infection caused by avian influenza viruses. These influenza viruses are naturally among birds. Wild birds worldwide carry the viruses in their intestines but usually do not get sick of them.
However, avian influenza in birds is very contagious and can make some domesticated birds, chickens, ducks and turkeys, very sick and kill them. Infected birds shed flu virus in their saliva, nasal secretions and feces. susceptible birds become infected whenget contaminated with secretions or excretions or with surfaces contaminated with secretions or excretions contact with infected birds.
domestic birds from avian influenza virus through direct contact with infected waterfowl or other infected poultry or through contact with infected surfaces or materials such as water or feed that has been contaminated with the virus.
Types of bird flu disease
The avian influenza infection inDomestic poultry causes two main forms of disease that are known for extreme low and high virulence. The low pathogenic form may go undetected and usually causes only mild symptoms. 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. There are many different subtypes of influenza virus type A. These subtypes differdue to changes in certain proteins on the surface of influenza virus.
There are 16 known HA subtypes and 9 NA subtypes of influenza A virus known. Many different combinations of HA and NA proteins are likely. Each combination represents a different subtype. All are considered subtypes of influenza viruses in birds.
The symptoms of bird flu symptoms
In general, when does the avian influenza virus influenza A virus to find, especially in birds, but infectionsmay occur with these viruses in humans. The risk of avian influenza is generally low to most people because the viruses do not normally infect humans. However, confirmed cases of human infection from several subtypes of avian influenza infection reported since 1997.
Most cases of avian influenza infection in humans through contact with infected poultry or surfaces contaminated with secretions and excretions from infected birds out. The spread of avian influenzaThe virus from one ill person to another has been reported very rarely, and transmission has not been observed, more than one person. The symptoms of avian influenza in humans have ranged from typical human flu-like symptoms, complications and other severe and life-threatening. The symptoms of avian influenza may depend on what caused the infection of the virus.
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