Summer is the hottest season of the year, high temperature will bring discomfort to the human body, but more depressing than hot and hot is mosquito bites, and more depressing than mosquito bites, is the infectious diseases that may occur after bites.
On June 8, the mainland customs administration issued a message that the recent outbreak of dengue fever in many countries reminded everyone to be vigilant, the day before June 7, the head of Singapore's Ministry of Sustainable Development and Environment and the Ministry of Home Affairs said, "The number of dengue cases will definitely rise rapidly, and we must face this emergency." "Because before June 1, there were more than 11,670 cases of dengue fever in the country, and the peak period of dengue fever in Singapore has not yet begun in previous years, and the data shows that the total number of dengue cases in Singapore last year (2021) was 5258, which is already double last year, but the peak period has not yet arrived."
It is very unexpected that such a situation occurs in a developed country with excellent sanitary conditions such as Singapore. In fact, southeast Asian countries such as the Philippines, Singapore, Vietnam, Myanmar, and Malaysia have reported many cases of dengue fever. But at present, the largest number of dengue fever cases has occurred in South America, brazil, where the ministry of health data shows that there has been the most serious dengue outbreak in a decade, data show that a total of 655,000 dengue cases were reported from January to April this year, while the country only had 544,000 cases last year, which means that the number of dengue fever outbreaks in the first four months of this year has been 1.2 times that of last year.
The World Health Organization (WHO) has also recently reported an outbreak of dengue fever in the small island nation of Sao Tome and Principe in West Africa, and in the 33 days from April 15 to May 17, the country with a population of only 200,000 people has reported a cumulative total of 103 cases of dengue fever, which shows that this year's dengue fever situation cannot be underestimated.
In fact, as early as 31 March this year, WHO's Director of Global Communicable Disease Preparedness, Sylvie Buriander, said at a meeting that the next pandemic is likely to be caused by a new arbovirus, and there are some signs that this risk is increasing, and the fight against arboviruses has become more urgent.
Dengue fever is an acute insect-borne infectious disease caused by dengue virus, mainly caused by mosquito bites, mosquitoes and ticks are the main transmitters, and mosquitoes account for more than 90% of the source of transmission, the main host is Aedes mosquitoes, including Aedes aegypti and Aedes albopictus, these two mosquitoes look black and white, often referred to as "flower mosquitoes", they like to move during the day, is the culprit of most of the sources of dengue infection.
Aedes albopictus, also known as "Asian tiger mosquito", native to the tropical rainforests of Southeast Asia, with the global transportation of passengers and goods, this mosquito began to spread to the world, on the mainland, Aedes albopictus is widely distributed, and Aedes aegypti is mainly distributed in the area south of the Tropic of Cancer.
Friends in the north who are about 40 years old should know that when they were young, they never saw this kind of "flower mosquito" with white spots on the body, so they would hardly encounter mosquito bites during the day, but this mosquito began to appear about thirty years ago, because many people at that time had not seen this kind of body color black and white mosquito, once thought it was from the "Citi country", so this mosquito has another name called "American Mosquito", In fact, it was transported from Southeast Asia through various channels to all parts of the mainland, most of which first appeared near airports, cargo terminals and ports, and then gradually spread widely, and now it is almost all over the country.
In the world, the range of distribution of Aedes albopictus is now quite extensive, most of the countries have this mosquito existence, because it is very fierce and good at sneak attack, a little inattentive will be bitten by it, and after being bitten is very painful, giving a "big red packet" is indispensable, so there is the title of "Asian tiger mosquito", fortunately this mosquito in the world Distribution appeared thousands of years late, if it appears at the dawn of human civilization at the moment of dawn, At that time, the living conditions and medical standards of human beings could not deal with it at all, and the infectious diseases it could cause could become a catastrophe, and human civilization could be snuffed out by it.
Even today, when people's living and medical conditions have been greatly improved, the number of deaths caused by mosquito bites in the world every year is still as high as 700,000 or 800,000, and it is clear that mosquitoes are still the "first killer" of human beings, and Aedes mosquitoes are one of the main "killers", and there is no particularly effective way to eliminate it.
If we want to be bitten by mosquitoes such as Aedes mosquitoes as little as possible, what we can do is not to stay at the water's edge and in places with more grass and trees in the summer, and it is easy to be "rewarded with red envelopes" by Aedes mosquitoes; If you have to do outdoor activities, try to wear long sleeves and pants; In the living environment, the water in the open container should be poured out, so as not to breed the mosquito inside; If you are stung by it, wash it with soapy water as soon as possible and apply floral lotion, and if there is a bad situation, you need to go to the doctor.
Resources:
"Xinhua Net" June 9 article "The Philippines, Singapore, Vietnam, Myanmar, Malaysia and other Southeast Asian countries have reported different degrees of dengue fever"
Upstream News April 1 article "WHO: Arboviruses such as dengue fever may trigger the next pandemic"