Recently, it has been raining heavily in Shenzhen
After a little pause, it will feel stuffy again
Mosquitoes are abundant in this hot and humid weather
Everyone should be vigilant
Beware of one fever – dengue
After being hit, it hurts more than a broken bone!
Official website of the World Health Organization (WHO).
Published data shows:
Since 2024
Mainland, neighboring countries
and previous major dengue cases from countries of importation
The number of cases is higher than the same period in 2023
All have an upward trend
Dengue cases have surged in many countries
- On April 22, local time, data released by the Brazilian Ministry of Health showed that the number of cases of dengue fever infection in Brazil in 2024 rose to 3758837, an increase of 250,000 cases from the data at the end of last week. There were 1,657 deaths and another 2,205 deaths to be verified. The number of dengue deaths in Brazil in 2024 continues to break all-time records, with the previous record high of 1,179 in 2023.
- On April 21, local time, the Argentine Ministry of Health reported that the cumulative number of dengue fever cases in the country has exceeded 315,000 since 2024, a year-on-year increase of more than 3 times compared with 2023. The report said that 315942 cases of dengue fever have been confirmed in the country, and since the end of July last year, the number of deaths due to dengue fever has been 238, and the median age of death is 48 years, with the youngest being less than one year old and the oldest being 104 years old.
- On April 20, local time, according to the latest report from the National Center for Epidemiology, Prevention and Disease Control of the Ministry of Health of Peru, as of the 15th week of this year on April 14, the country has reported a total of 155274 cases of dengue fever this year, including 146 deaths, and the number of infection cases has increased by 4 times compared with the same period in 2023.
- As of the 15th week of 2024, the country has reported 62,000 confirmed cases of dengue fever and 475 deaths, about three times that of the same period last year, according to the Indonesian health department on April 15. It mostly occurs in Tangerang, Bandung and other places. A confirmed case has been found in a Chinese citizen.
From May, dengue fever enters the epidemic season
May ~ November every year is the epidemic season for dengue fever transmission, and the peak of the epidemic is July ~ September.
Specifically, dengue fever is an acute insect-borne infection caused by dengue virus, mainly transmitted by the bite of Aedes mosquitoes, and the epidemic area is mainly distributed in tropical and subtropical regions, with Southeast Asia, the Western Pacific and the Americas being the most serious.
Dengue fever is mainly prevalent in Guangdong, Guangxi, Hainan, Fujian, Zhejiang and other regions in mainland China, and has typical imported and sudden characteristics. At the same time, it has the characteristics of rapid transmission, high incidence, general susceptibility of the population, and high risk of death in a small number of severe cases.
Beware of these two "flower mosquitoes"
Dengue fever is mainly transmitted by the route of "patient→ Aedes mosquito → others". Diseases are generally not transmitted directly from person to person.
The vectors of dengue fever on the mainland are Aedes albopictus and Aedes aegypti, commonly known as "flower mosquitoes".
▏Aedes albopictus
It is mainly distributed in the vast area of the mainland from Hainan Island in the south, to the central and southern parts of Liaoning in the north, to Baoji in Shaanxi Province in the west, and in the south of Tibet.
Aedes albopictus is almost the same as people's activity time, and the peak time for bites is around sunrise and before sunset.
Aedes albopictus larvae prefer clean water, and tree holes, stone holes, stagnant water tires, discarded bowls and boxes, bottles and jars for storing water, and leaf axils of clumps of plants in the community are all breeding grounds for their offspring.
▏Aedes aegypti mosquito
In the mainland, it is mainly distributed in coastal cities and counties of Hainan Province and volcanic rock areas, Leizhou Peninsula in Guangdong Province, and border areas of Yunnan Province.
Aedes aegypti mosquitoes actively suck blood throughout the day, except for the peak of their bites in the morning and near dusk.
Compared with Aedes albopictus, Aedes aegypti is more "close" to humans and is a typical "house mosquito". They mainly inhabit indoor and outdoor sheltered and shady places, such as the foot of the water tank, behind the cupboard, under the bed in the bedroom, the corner of the wall, the mosquito net and the hidden place in the courtyard.
After dengue fever patients or latent infected people are bitten by Aedes mosquitoes, the virus generally needs 8~10 days of multiplication in the body of Aedes mosquitoes before the virus can be transmitted to humans through the bite.
The mainland population is generally susceptible to dengue virus, and the incubation period after infection is generally 1~14 days (most are 5~9 days), but some people do not develop the disease (i.e., latent infection). Aedes mosquitoes are widely distributed on the continent and the virus may spread rapidly after importation.
How to tell if you have dengue fever
The typical symptoms of dengue fever can be summarized as: sudden high fever + three red signs + three pains + rash.
Sudden high fever: The body temperature can rise to 39 or 40 degrees Celsius in 24 to 36 hours.
Three red signs: flushing of the face, neck, and chest.
Three pains: severe headache, generalized joint pain, muscle aches.
Rash: An congestive or punctate hemorrhagic rash on the limbs, trunk, or head and face.
If you have stayed in a dengue fever-endemic country or region in the past 2 weeks, or if you have a dengue fever case in the community, street, or even city where you live and live, you should consider dengue fever when you have an acute fever (sometimes up to 39°C) accompanied by one of the following symptoms, such as obvious fatigue, anorexia, nausea, etc., severe headache, orbital pain, generalized muscle pain, bone and joint pain, and flushing of the face, neck, and chest.
At this time, you should go to the hospital as soon as possible, and take the initiative to explain to the doctor your travel history in the past 2 weeks and possible dengue fever, so that you can get diagnosis and treatment as soon as possible, and take mosquito prevention and isolation to prevent further spread.
What to do to prevent dengue
At present, there is no specific drug for dengue fever, and there is no effective vaccine to prevent dengue fever in China. Avoiding mosquito bites is key!
Recent
Continuous heavy rain in many places in Guangdong
Mosquitoes breed in abundance
It also leads to the chance of dengue infection
Greatly increased
Everyone should pay attention to mosquito prevention and mosquito control at home
1. Turn over pots and cans to clean up all kinds of useless stagnant water in and around the house.
2. Keep the home and the surrounding environment hygienic and tidy, and remove all kinds of sanitary dead corners and garbage.
3. Drinking water containers for people and animals or other useful water containers should be changed thoroughly once every 5~7 days.
4. Reduce the planting of aquatic plants at home, and change the water thoroughly once every 5~7 days in the containers that have been planted.
5. The landscape water body around the house can be stocked with ornamental fish or local species of mosquito-eating fish.
6. Tires should be stored indoors or in a rain-sheltered place, and should be tightly covered with a rainproof cloth when stacked outdoors. Outdoor waste tires are perforated to prevent water storage, and tires that are difficult to remove stagnant water can be used to kill larval mosquitoes with dithionphos and S-dimethobin.
7. For the vegetation in the environment around the home, the adult Aedes mosquitoes can be killed with sensitive public health insecticides.
The May Day holiday is coming
Planned travel
Especially if you are traveling abroad
Here are a few things to keep in mind
▏ Before you travel
Understand the local dengue fever epidemic situation and epidemic risk, avoid going to epidemic areas, and properly prepare mosquito prevention and control supplies, such as: mosquito repellent, toilet water, mosquito coils, electric mosquito swatters, mosquito killer lamps, mosquito nets, high-efficiency and low-toxicity mosquito killers, etc.
▏ On the go
Wear long-sleeved clothes and trousers, try to choose light colors, use mosquito repellent and other mosquito repellent products when going out to avoid being bitten by mosquitoes; try to choose a hotel with screen doors and window screens, and use mosquito coils and mosquito aerosols in the room during the stay; when there are suspected symptoms of dengue fever, you should seek medical attention in time.
▏ After the return trip
After returning to the local area, do a good job of monitoring your own health, if you have fever, rash and other symptoms within 2 weeks, you should seek medical attention in time, take the initiative to mention your travel and residence history, and cooperate with the health and quarantine department to carry out investigations, corresponding medical examinations and hospitalization and isolation treatment if necessary.
Finally, I send you all
A correct posture to fight mosquitoes
(Source: Guangzhou Daily New Flower City)
Due to the structure of its wings and its unique way of flying, mosquitoes are better at flying up and down, so when you clap your hands sideways, they will fly up or down quickly.
-END-
Edit | Mo Xiangjun
Proofreading | Li Xia, Wei Ding, and Wang established diplomatic relations
Proofreading | Yang Sha
Executive Producer | Weekly
Source of information | China News Service, Healthy China, Chinese Center for Disease Control and Prevention