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Posts Tagged ‘avian flu’

Virus that causes Avian flu is one type of family Orthomyxoviridae, which consists of Type A that attacks poultry, pigs B and C to attack the attacking mammals and humans. But on the way mutations, type A viruses are also transmitted to humans.

Virus type A has antigen H (Hemaglutinin = HA) as many as 16 pairs, the H1-H16 and 9 N antigens (Neuraminidase = NA), the N1 – N9 that can change form. Virus type A H5N1 is the most violent of which also proved to be transmitted from birds to humans it can also be transmitted to the lions, tigers and domestic cats fed raw poultry meat contaminated with the virus.

Variations combination of H and N antigens on the virus type A viruses produce: H5N1, H7N2, H1N7, H7N3, H13N6, H5N9, H11N6, H3N8, H9N2, H5N2, H4N8, H10N7, H2N2, H8N4, H14N5, H6N5, H12N5 and others . Some diseases are influenza in animals: Swine flu caused by virus H1N1, H1N2, H3N1 and H3N2, that horse flu had appeared in 1956 caused by H7N7 and H3N8 viruses, the dog flu that attacked Florida in 2004.

Pandemic influenza virus has attacked humans since the 1918 Spanish flu caused the disease within a few months has claimed more than 100 million victims, far more than the victims of World War II. Of some cases of flu that infect humans for several decades, there are only 16 kinds of proven virus from humans and the rest is the type of virus that mutated from type A influenza virus that attacks poultry. Pandemics in 1918 has proven to also come from a virus that attacks poultry.

Other kinds are:

1. H1N1, causing endemic in pigs and humans, the virus that causes this is the Spanish flu claimed more than 100 million people.
2. H2N2 caused Asian Flu epidemic which took 4 to 5 million victims in 1957 in China and also the surrounding region.
3. H3N2, which causes respiratory infections in humans and pigs. The virus claimed the lives of 750,000 people with the disease called Hong Kong flu in 1968. The virus is also the fruit of lips that claimed the lives of several children in the United States in 2003.
4. H5N1, is currently terganas bird flu virus that has caused 272 deaths worldwide. It is feared the virus becomes pandemic, as will be transmitted from human to human. Examples of cases that have been proven to happen in the family in Tangerang, which fortunately was not until the spread to other areas
5. H1N2 is endemic for humans and pigs. H1N2 type virus produced from the composition of H1N1 and H3N2 viruses hemaglutinin where the protein is similar to the type of H1N1 and Neuraminidase protein similar to the H3N2 type virus.
6. H7N7, a virus that attacks the animal but have unusual characteristics. This virus caused casualties in the Netherlands as many as 89 people who died but only 1 person only.
7. H9N2, is a low pathogen virus type A viruses that attack birds. Victim number 3 children residing in Hong Kong and China, and all three can be fully recovered.
8. H7N2, caused 2 casualties in New York and Virginia around the year 2003 and 2002, both of which can be cured
9. H7N3, the North American attack in 2004 in the British Coloumbia. 18 farms have been saved from the attacks and the spread of the virus and 2 cases have been resolved. Disease cases that appear to have flu-like symptoms, and victims can be saved
10. H10N7, was first reported to infect humans when found in the case of 2 toddlers in Egypt in 2004 which affected the virus.

All type A viruses in the world and become a pandemic now suspected to be the result of mutation of the H1N1 viruses into Spanish flu pandemic, where the virus was eventually appointed as the mother of all types of virus type A.

H1N1 virus which was then transmitted from poultry to poultry proven to change and spread from human to human to cause so many casualties. Feared this phenomenon will be caused by the H5N1 virus.

Changes in the virus mutation common in pigs where the pig’s body always functions as a mixing vessel of several different types of viruses, which plays an important role in the process of evolution of influenza viruses. The virus can be transmitted from birds to pigs and produce the body of a virus similar to human flu virus.

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