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1.SEVERE ACUTE RESPIRATORY SYNDROME (SARS) is a respiratory illness caused by a virus belonging to the coronavirus family, which includes viruses that cause the common cold. The first report of SARS occurred in Asia in February 2003 and spread rapidly to over 24 countries in the following months. This outbreak resulted in a worldwide total of 8098 SARS cases and 744 deaths. There were 192 cases of SARS and zero deaths in the United States. Travelers returning from areas with SARS were cause for many of the U.S. cases. The SARS outbreak of 2003 was contained with the last known case of SARS occurring in Taiwan, China on June 15 2003. Since then a confirmed case of SARS was reported on September 8, 2003 in Singapore. However, this was an isolated case linked to accidental infection in the laboratory. While this case did not cause concern for international public health, the threat of re-emergence of the SARS associated coronavirus persistsAll sayContagion SARS is a kind of impatient breath system infection, World Health Organization(WHO) announces its name as Severe Acute Respiratory Syndrome on March 15.(SevereAcuteRespiratorySyndrome, SARS)The SARS is cause by a kind of new cause of, the clinical main performance is a pneumonia, there is gathering phenomenon of show the Zhao at the family and the hospital, currently at local and parts of regions the sick example take place.SARS physically is different from so-called typical model pneumonia cause by germ of a set of pneumonia, once indicated generally a germ outside of cause body with the result that of pneumonia.Mainly point now from pay an original body, dress original body, army corps germ and sign a gram of time body, gland virus and a little bit other not clear microorganisms cause of impatient breath way infection companion pneumonia.These cause bodies also call the non- typical model cause body.SARS mainly passes close quarter air breathing in flying particles of saliva with touch elbow a dissemination, is the impatient infectious disease of a kind of breath way, have already compared stronger infection.CauseWorld Health Organization declares that formal confirmation coronal a mutation of the virus is the cause body which causes SARS.The scientists say that the virus of the virus and flu of the mutation coronal contains relative relation, but it is very special, have never discovered on mankind's body before and the scientist named after its"SARS virus".(the SARS was "non- Dian" the English abbreviation of the scientific term)The Hong Kong health expert expeled it the possibility for having something to do with the virus of A type flu and B type flu and appear with 1997 of H5 N1 the virus of bird flu also didn't have connection.Say according to Hong Kong health officer, SARS is usually cause by virus, for example the virus, gland virus of flu with other breath way virus.SARS also is probably cause by living creature body.A kind of new contagion disease of the breath system that contagion SARS is cause by the mutation coronal virus(the SARS virus)."It is in the center a circular, on all sides have gray shadow, most the outer circle be the Tu that a tightly gets to rise part."Clear while give or get an electric shock the mirror everything see, the appearance of virus" is like'Statue of Liberty'the hat of top of head, call'corona of the sun virus'perhaps'coronal virus'.Basically confirming it is basicallythe cause body of SARS this time."The cause learns a research dynamic stateWithdraw a lung specimen slice after grind the liquid infuses into the cell that brain, chicken Pei and body of small rat outside develop respectively.""Rat, chicken Pei, cell" are three kinds of different virus implantation body.After 30 hours, in addition to chicken Pei, two other cause implantation bodies have already taken place variety:"Inoculate to there are 8 all appearing in 10 rats of virus with the result that disease respond, 2 among those have been already die."The pathological changes of cell equally shows Zhao, "under the electricity mirror of the cell appeared the net structure of the pathological changes".In view of the fact inoculate for the first time, various varieties all haven't expressed a certain regulation and connect down to want to constantly chase with the result that the lung slice of the disease small rat withdraws a liquid to infect more small rats and cell again to acquire more stable cause body.7 divas saw "coronal virus" in the electricity the mirror."The not all new rare virus of the coronal virus, but existing discover from mankind's body of all three kinds of coronal viruses, all will lead to common common cold, slight a cough and fever, cut off little can cause pneumonia complications death, these all with not typical model the high contagion of the pneumonia with cause death sex is different.Collected the serum of 30 patients of SARSs, make use of'immunity fluorescence method'will separate virus and this 30 serums to carry on a serology examination, have 23 reactions to present masculine gender as a result, this directly explained coronal virus with'non- Dian'the cause contain the most close relation.But reversal record the DNA sequence measurement that the PCR method carries on virus to show, separate the cause body of with have already known coronal virus the gene and source attains 64% and so still have 36% dissimilarities is because of why?This at basic confirm the cause body of SARS of in the meantime, after also explaining that the coronal virus this time is a gene variation of all new species.According to this kind of coronal virus invade human body of characteristics, the suggestion is public to want to frequently wash hands and this is probably even more important than wearing mouth-muffle to want.Because this kind of virus ability is up in the air to survive for 4-5 hours, the hand will become their to depend on a body, but the hand usually gets in touch with the eye, etc. body part again, these mucosa organization of the coat protein will become fan coronal virus and human body cell to combine together of be subjected to a body, then become the passage that the virus gets into a human body."But the variety of this kind of gene actually again is how take place?On April 11 of in brief stay overnight an experiment at a time medium, passing to act for a gene will separate February of cause to the rat death of the coronal virus convert for the virus of infect the cat cell, the cause body which supports SARS as a result may when the animal and mankind's virus meet, be take place gene to exchange but creation of predict.Will separate a gene part of the coronal virus of the coronal virus ducting cat of , this gene codes a kind of coat protein and can identify and help to wear deeply cat cell.After several hours, small rat coronal some coat protein genes of sons of the virus became the coat gene of cat, as a result can infect cat cell, this proved the coronal virus reshuffles gene ability in this kind of way really a dissimilarity usually.The coronal virus passes a gene change and can with ease change an infection host, SARS(SARS) virus is also very likely to be existing nimal exchange infection to mankind behind mutate of a kind of more fatal form.Connect next is to build up a "animal experiment model", provide the conclusion the proof for the end confirmation of coronal virus, complete virus heredity a sequence to measure all experiments of preface, real make the sequence of events of pure cause body.2.China announces the chief culprit coronal of"non- Dian" virus diagram |
