Why can pig's influenza spread in human world

Why can pig's influenza spread in human world
Why can pig's influenza spread in human world
Beijing the intersection of Temple of Earth and Cai DongHong the intersection of cell and hemagglutinin, chief physician of hospital, determine, infect with species influenza virus first very much loud virus group, belong to and stick the virus department. Including people A, B, C-mode influenza virus and A of the animal, C-mode influenza virus. People influenza virus, bird flu virus and pig's influenza virus are all the members of this big family, they can cause people, birds and pig to get influenza (abbreviate as influenza) separately . There is a kind of albumen known as hemagglutinin of erythrocyte on surface of influenza virus, this kind of albumen is determining whether the species that influenza virus infects is people or a certain animal. Generally speaking, erythrocyte of bird flu virus hemagglutinin can only until leather the intersection of cell and receptor of surface combine at the the intersection of poultry and respiratory tract, erythrocyte, pig of influenza virus hemagglutinin can only until leather the intersection of cell and receptor of surface combine on the respiratory tract of pig, so can not infect the mankind directly easily, it is very difficult to cause interpersonal influenza to spread and prevailing. Only people influenza virus can cause human influenza to prevail. So, though bird flu has wreaked havoc in the whole world poultry everywhere in the past few years, infect the human incident and happen occasionally too, but because poultry and human cell difference are too far, so has never caused interpersonal spread. The pig the virus jumps the species and infects the human one " The springboard " Not only the boundary line to break species of influenza of pig of countries such as this Mexico and U.S.A.,etc., having infected the mankind, has also caused the prevalence of human world, this is determined because of the special status in various animal influenza of pig's influenza. The pig is a mammal. Have already now proved, the pig is " intermediate hosts " of different animals and the people influenza virus ,Also can be said other animal's influenza virus jump the species and infect the human one " The springboard " . Scientist the intersection of world and first influenza large prevailing reason carry on detailed investigation to 1918 once, the discovery is that bird flu virus infected pigs in 1910 first, evolve into pig's influenza virus gradually, then the pig passes the virus to the mankind, lead to the fact the first influenza prevails big in the history of mankind. When the human influenza of the second and third times of world that happened in 1957 and 1968 prevails big, popular H2N2 at that time and H3N2 -type influenza virus have been infected with the pig at the same time or successively by the mankind and poultry influenza virus, and the gene happens to match in the body of the pig again, has formed birds - people influenza virus' phenotype, infect it to the mankind from pig again, and cause human influenza to prevail. In 1993 the Dutch scientist found the virus that 2 influenza patients of children were infected with was reconfigured on pig by the Model H3N2 people influenza virus and H1N1 -type bird flu virus, have become new influenza virus of one, has had the fathers of these two children that have contacted to infect with the pig. Pig's influenza does not infringe the mankind for the first time Not that pig's influenza infects the mankind " The news " . As far back as February of 1976, a breaking out in influenza incident happened in the new military camp of Deeks fort of continent of New Jersey of U.S.A., lead to the fact 13 people are ill, a 18 -year-old soldier's unexpected death. While studying the cause of disease of influenza at that time, people isolate pig influenza virus of three of Model H1N1 from patient's nasopharyngeal secretion, and is verified about more than 500 people are infected in the military camp by the antibody test. In 1986, Holland found Model H1N1 pig influenza virus coming from the poultry together caused an adult to suffer from pneumonia. In 1988, after a pregnant woman of Wisconsin state of U.S.A. touched the pig which was infected with pig influenza virus of Model H1N1 in gestation in later period, suffer from primary viral pneumonia but dead. It separate body since she to virus and disease what pig infect all influenza viruses H1N1 -type. People were infected with 50 case reports of pig's influenza by 1958~2005 in the search altogether in 2006 of American scholar Kendall, among them over half takes place in U.S.A., other cases take place in Czech, Holland, Russia, Switzerland, Canada and Hong Kong respectively. It is obvious there are reports which infringe the mankind in a lot of areas of the whole world in pig's influenza. It leads to the fact human world to travel and analyze according to 50 case reports that U.S.A. scholar Kendall is infected pig's influenza to people in the past that pig's influenza virus makes a variation, except popular incident in the American military camp of pig's influenza of 1976, 37 other persons were infected with the case of pig's influenza and distributed, and 61% all have history of contact with disease pig, it is rare for person - people's human world to spread. And the people of countries such as Mexico,etc. have been infected with patient pig's influenza virus recently, the overwhelming majority has not contacted pigs, have already been verified - people spread, explain this kind of pig's influenza virus to already make a variation into influenza virus that can be transmitted in human world. So especially deserve our vigilance. Prevent influenza of pig of countries such as pig's influenza and ordinary influenza similar Mexico,etc. and prevail and was propagated by the people - people, it is respiratory tract infectious disease as past person's influenza. So, its prevention is similar to prevention of influenza. Should pay attention to taking exercises at ordinary times, strengthen the resistance to various diseases. Should pay attention to the self-protection when popular, pay attention to the personal hygiene; Wash hands hardworkingly, change one's clothes hardworkingly, increase and decrease the clothes according to weather change; Go few even not go in crowded public place and home of the persons who are suffering from influenza; Amusement should be appropriate on festivals or holidays, can't eat and drink immoderately; The room should be ventilated and taken a breath frequently, keep clean. Once ill go to the hospital to see the doctor in time, the patient wants to isolate, contact and want to wear the gauze mask with the patient. The pork that our country produced or imported was quarantined strictly, the disease pig will not enter the market. And pork heat, process procedure it eats to be to will make people infect with the intersection of pig and influenza. In the recent prevalence, the death patients who makes a definite diagnosis of pig's influenza are mostly 25- 45 years old person. The scientist thinks, this perhaps because old man and children have injected vaccine of influenza, there is certain immunity on pig's influenza virus. So, once our country has pig's influenza that prevails, inoculating people influenza vaccine may play certain prevention function, but still need to further verify.


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