What types of avian influenza do h and N mean?
4hw.org: in recent years, children will surely hear the word "bird flu" in every period of time. Recently, there has been an outbreak of highly pathogenic bird flu h5n9 in South Korea. Many children wonder why there are so many kinds of bird flu. What do you mean by "H" and "n" and how many types are there? Can bird flu be completely contained? Let's take a look!
What are the types of avian influenza?
What are the types of avian influenza? The following will introduce the avian influenza viruses that once threatened human beings. These avian influenza viruses are extremely terrible and shocked the whole human race. This article is edited and collated by sihai.com, reprinted and noted with the source. The original link: http://www.4hw.com.cn/life/jiankang.html
In March 2013, human infection with h7n9 avian influenza was found in Shanghai and Anhui, which is the first new subtype of influenza virus in the world. At present, the research data on this virus and the diseases caused by it are very limited!
H5N1 avian influenza: the greatest threat to human beings
In 1997, 3-year-old boys in Hong Kong died of n5n1 infection. This is the first human case of H5N1 infection in the world. Since then, the virus has become the most dangerous avian influenza virus in the world.
H5N2 avian influenza
Low risk of human infection
In 2004, there was an outbreak of H5N2 infection in poultry in Taiwan. However, it was found that H5N2 antibody was detected in the body of people who contacted with chickens, which showed that H5N2 avian influenza could be transmitted to people. This article is edited and collated by sihai.com, reprinted and noted with the source. The original link: http://www.4hw.com.cn/life/jiankang.html
H9N2 avian influenza
Relatively weak toxicity
In 2003, a 5-year-old boy in Hong Kong was infected with H9N2 virus. Compared with the samples of chicken H9N2 virus, it was found that the virus gene was very similar, indicating that H9N2 virus can infect human beings and cause influenza.
H7N7 avian influenza
Low pathogenic
In 2003, more than 80 people in the Netherlands were infected with avian influenza virus, and a 57 year old Dutch vet died of complications. Since then, H7N7 avian influenza has spread throughout Europe.
H7N2 avian influenza
Less dangerous
A man with fever and cough in the United States confirmed H7N2 infection in 2003, becoming the second case of human avian influenza virus in the United States. In 2007, four people in the UK were infected with H7N2 avian influenza virus.
H7N3 avian influenza
Infrequently infecting humans
In 2004, a Canadian staff member was found to have conjunctivitis, sore throat, cough and other symptoms after visiting the chicken farm where H7N3 avian influenza broke out. They were confirmed to be infected with H7N3 avian virus and then cured.
Maybe you think influenza is a small thing, but when the bird flu virus develops into a terrible disease, it is a very dangerous thing.
H7n9 avian influenza
Low risk of human infection
In March 2013, human infection with h7n9 avian influenza was found in Shanghai and Anhui, which is the first new subtype of influenza virus in the world. At present, the research data on this virus and the diseases caused by it are very limited!
H5n8 avian influenza
H5n8, h5n8 avian influenza has been outbreak again in South Korea recently, both of which are highly pathogenic. Experts pointed out that h5n8 avian influenza is bound to spread to other poultry. As long as humans and poultry are in close contact, h5n8 virus, which has never appeared in humans before, is likely to be transmitted to humans.
Generally speaking, avian influenza refers to influenza A virus. There are two kinds of glycoproteins embedded on the surface of influenza A virus, one is hemagglutinin (HA), which has 15 types of h1-h15; the other is neuraminidase
The two proteins are arranged and combined to form a variety of virus subtypes. Avian influenza virus includes all 15 ha subtypes and 9 Na subtype combinations This combination may be 15 times; 9 = 135