The Paper's intern Yin Zhen reporter Wang Yasai
What Dency,
Withdraw! Withdraw! Withdraw!
Fewer mosquitoes this summer?
Previously, #Mosquitoes this year seemed to be less # rushed to Weibo hot search first. In Guangdong Province, for example, the Baidu index shows that the search index for the word "mosquito" peaked at just 907 this summer, the lowest in nearly eight years.
Many netizens said that mosquitoes were not heated to death?
According to Xinhua Newspaper Network, Chu Hongliang, director of the Institute of Disinfection and Vector Biological Control of the Jiangsu Provincial Center for Disease Control and Prevention, said that according to the monitoring results of mosquitoes in Jiangsu Province, the overall density of mosquitoes in March and June this year was lower than in previous years.
Chu Hongliang said that this is mainly because the breeding of mosquitoes is inseparable from the water body, and in recent months, the rain is less than in previous years, and the temperature is relatively high, which makes the water less, which affects the number and activity of mosquitoes.
Therefore, mosquitoes are not directly "heat dead", but their reproduction and activity are limited. Many netizens also said that mosquitoes were found to "go north to escape the heat".
01
In addition to mosquitoes, there are also moths and ticks this summer
In summer, it's not just mosquitoes, there are plenty of strange but unknown bugs. For example, most of the following bugs, probably most people have seen more or less, and they are frightened, but they can't say their names.
02 In 2021, 230 people died from mosquitoes across China
Although mosquitoes often brush around people and look upset, for most people, the intersection with these small flying insects is only a few mosquito packs that disappear every other day, but this does not mean that these ubiquitous summer insects do not cause harm to people.
In fact, as an important vector organism, mosquitoes can affect or endanger the normal life of human beings in a variety of ways.
In 2021, China reported a total of 80,951 cases of natural-source and insect-borne infectious diseases, with 230 deaths.
Mosquitoes, ticks, cryptoptera and other mosquitoes, which look small, can infect humans with various serious diseases.
In 2019, dengue outbreaks with Aedes mosquitoes as the main carriers broke out globally, mainly in the Americas and Asia, with 5.2 million cases worldwide. Due to the global pandemic, the number of dengue cases in China has also exceeded 20,000, although most dengue virus infections only cause mild disease, and the number of deaths caused by dengue fever in recent years has not been large.
In addition to dengue fever, Anopheles mosquitoes also transmit another disease with a high impact – malaria. To be precise, malaria is transmitted by infected female Anopheles mosquitoes (i.e., Anopheles mosquitoes), where mosquito saliva containing the parasite enters the human bloodstream when the anopheles bites humans, followed by the malaria parasite that moves with the blood to the liver and matures and multiplies in stem cells. In the 1940s, China reported about 30 million cases of malaria each year, but after decades of targeted action, in 2021, China finally had no indigenous cases of primary malaria infection for four consecutive years, and was certified by WHO as a country for malaria elimination.
Ticks, cryptoptera and scrubs are even less well known, but they can all cause harm to humans. For example, the small tick itself carries a variety of viruses and transmits the virus to humans through bites. There are many diseases transmitted by ticks as vectors, such as Lyme disease, which has cases all over the world, and ticks are inseparable.
At the same time, although some flying insects do not like to bite people, they often cause serious economic losses. For example, the "army of termites" that haunts after the rain flies all over the sky, especially likes to bite ancient buildings. In a 2019 survey of termite hazards in Nantong, Jiangsu Province, researchers found that 58.1% of ancient buildings in the city were harmed by termites, and 9.3% of buildings had termite hazard levels of III.
In the modern city, there are already many ways to prevent these summer-infested mosquitoes, from early monitoring and prevention, rainwater well injection, to various insect repellent spray drugs, etc., so that the presence of mosquitoes is not so high, but when the city is suspended in a special period, mosquitoes will also come out in groups. I'm afraid that this summer, everyone will have to "meet" with some bugs they haven't encountered before.
1. World Health Organization - Dengue fever and severe dengue fever, https://www.who.int/zh/news-room/fact-sheets/detail/dengue-and-severe-dengue
2. Xinhua Net - "China Obtains Malaria Elimination Certification, Another Milestone in the History of Health In mainland China", http://www.xinhuanet.com/politics/2021-07/09/c_1127640509.htm
3.Zhang Wentong,Yang Jiali,Wang Yu,Rong Fei,Wang Wenjing,Zhang Xinping,Yang Zhilan,Yao Dongchang. Investigation on termite hazards in ancient buildings in Nantong City, Jiangsu Province[J].Chinese Journal of Vector Biology and Control,2020,31(02):219-222.
Senior Editor of this issue Xing Tan