Dengue (Dengue Fever) is a disease caused by dengue virus, the disease is the earliest record of Chinese literature Jin, known as water poisoning. Because the disease causes muscle pain and joint pain in the West is called "broken bone fever." The 1780s in North America, Asia and Africa almost simultaneously dengue epidemic, and therefore this kind of disease and other separate wards, the first cases of dengue fever is a famous American physician Benjamin Rush report in 1789.
? ?
Rush is one of America's Founding Fathers, the "Declaration of Independence" signed a few years after the yellow fever epidemic in Philadelphia, he bloodletting therapy with a lot of people, including himself, the result destroyed more than reputation, Rush or psychosis founder of the school, he began, mental illness is treated as heresy disease rather than weird.
Dengue etiology and route of transmission was completely clear until the 20th century, in 1906, and its route of transmission is determined. In 1907, it became the second dengue virus was identified. And this disease and malaria, yellow fever, as is mosquito-borne. Dengue virus (DENV) is an RNA virus that has long existed, but until a few hundred years ago, the virus is present in wild animals, that is, in the parasitic Aedes and dengue virus primates circulating between animals and occasionally cause human illness. But it was changed cycle between humans and mosquitoes, dengue has become truly human illness. Examples of this are many, Ebola is an example, is currently still in its host and Ebola among primates, and not really into humans, but the threat is real.
Rapid increase in dengue because large population movements WWII time, now in 110 countries belong to common diseases, each year 10 million to 500 million people worldwide are infected, resulting in 50 people hospitalized, 25,000 people were killed. South Asian country where 12 million people are infected each year, 6,000 people died. Africa is 20% of the population is affected by dengue threat.
In the past half century, dengue cases increased by 30 times. The reason why dengue grow so fast, there are several possible reasons, including the suburbs occur rapidly, drainage systems have not kept mosquito breeding grounds are not well climate change and the evolution of the and other aspects of international travel increases . Because there are so many factors to control dengue fever is relatively difficult. There are 2.5 billion people living in endemic areas of dengue, of which 70% in the Asia Pacific region, so that dengue has become second only to malaria vector-borne diseases is a serious epidemic in Asia.
Dengue mortality rate of 1% to 5%. Most mild symptoms, about a week to heal. Mild symptoms include high fever, headache, rash, muscle pain and joint pain. The symptoms are severe dengue hemorrhagic fever, such a sharp decline in blood pressure, may lead to death.
These symptoms of other diseases is also possible to determine how is dengue?
Without determining, Been dengue endemic areas, the sudden appearance of these symptoms should see a doctor. If symptoms are mild belonging to the above said, there was no need to do special tests and analysis of the virus, and so on because the results came out, you probably have a good, long or very bad.
There are four types of dengue virus after infection of this virus will be life-long immunity, temporary immunity against other viruses, it is possible to have up to four back dengue fever, which are prone to repeated infections hemorrhagic fever.
Since there is no specific drug, the key is to maintain fluid balance, if we can drink water and urinate, no other patients with mild symptoms of the problem take some painkillers, home endured. Patients will have severe hospitalization, supportive care, infusion, transfusion if severe blood loss.
Is dengue vaccine clinical trials, there are several, one of which has just completed Phase III clinical, security is very good, very good effectiveness, clinical trials in Thailand, the validity of only 30.2%, the final 56% of IV viral response rates were 54.5% ,, 34.7%, 65.2%, 72.4%, type II dengue prevention capability worst. Another study, only 60% of Type II or the worst. However, the vaccine can reduce 80% of severe cases.
In this case, the key is to prevent dengue mosquitoes, not mosquito bites. By eliminating mosquito breeding grounds to control, we must first try to ensure that no open water, if the case can not go out into the water with pesticides. The former is indeed difficult to achieve, which is a great health risks. Half a century ago the global anti-mosquito operations ended in failure, the ecological impact of DDT until today still exist.
In this case, to take personal measures to prevent dengue fever. First, do not go to dengue endemic areas, this is not easy, with many people living in dengue endemic areas, including many areas in southern China. So we must take a long-sleeved wear long clothes, do not expose the skin approach, rest and sleep to use screens mosquito nets, or use insect repellent.
However, these methods now it seems the effect is not good, but also by the impact of climate change, dengue fever will continue to maintain an upward trend, and it is a serious health challenges facing the future of humanity one day.
This article has copyright by the daily newspaper http://zhidao.baidu.com/daily Baidu know or provided by content partners authorized without written permission Daily Baidu know, any third party individual or organization may not be copied, reproduced excerpts, mirrors or in any other way use. Baidu know the daily chase responsibility and rights reserved. Contact mailbox zhidaoribao@baidu.com
Article Source: Baidu know daily (http://zhidao.baidu.com/daily)
Original link: http: //zhidao.baidu.com/daily/view id = 2840?