Avian Influenza
Avian flu is the term for disease of birds caused by different influenza viruses. Normally, the birds are not very sick, but some viruses especially those which contain the name of H5 and H7 subtypes, are more dangerous than others, the infecting more and proposes often kill birds, especially poultry birds. Anatidae and other migratory birds are attacked often, but few die. It is seen that other animals such as pigs, and members of felines can be infected with bird flu virus.
How is bird flu?
Bird flu does not usually infect humans, but the specific infectious and said H5N1 (1997 and from 2003 in Asia) and H7N7 (2003 in Holland) has infected humans.
Worldwide, nearly 100 people have died from bird flu out of the approximately 180 people who have had bird flu, but because of the risk of mutations (changes in genetic material) and thus a pandemic (worldwide epidemic), these court cases have attracted much attention. This has not been less of the information about the many millions of birds that have had to kill for preventive purposes.
Bird flu infects only from animals to humans through close contact. Virus is excreted in large amounts in stool and fluids as saliva, but is also found in the blood. From there the virus is inhaled or in the mouth of the one way or another. Viruses can survive in the environment of days to weeks. There are very few and not quite sure reports of infection with the H5N1 virus between two people, but never further.
