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Dengue transmission occurs during the bite of a virus-infected Aedes aegypti mosquito. After the bite, symptoms can appear between 5 and 15 days, and there may be headache, high fever, pain in the back of the eyes and body pain.
Dengue is not contagious, that is, it cannot be transmitted from person to person, and it is also not transmitted through the consumption of food or water.
Dengue transmission is exclusively through the bite of an infected mosquito. The virus can also be passed from humans to mosquitoes, in which the Aedes aegypti mosquito, when biting a person with dengue, acquires the virus and can transmit it to other people.
How the transmission happens
Dengue transmission occurs through the bite of the female Aedes aegypti mosquito infected with the dengue virus, with no person-to-person transmission. Only infected female mosquitoes transmit the disease, because they need blood so that their eggs can mature and continue their life cycle.
The dengue mosquito is characterized by having black color and white streaks on its body, head and paws, and can be easily differentiated from other mosquitoes. See how to identify the dengue mosquito.
Dengue transmission is more likely to occur in the cooler hours of the day, such as early in the day or late in the afternoon. In addition, transmission occurs more frequently in warmer places with high humidity, because these are favorable conditions for the development of eggs, transformation into a mosquito and, consequently, the spread of the virus.
Can dengue be transmitted more than once?
Yes, dengue can be transmitted more than once, that's because there are 5 types of dengue virus, which are known as DEN-1, DEN-2, DEN-3, DEN-4 and DEN-5, which may result in the development of more or less intense symptoms, in addition to an increased risk of developing hemorrhagic dengue from the second infection by the dengue virus. Learn more about the types of dengue.
How to know if it is dengue
To know if you have dengue, it is important to be aware of the symptoms that usually appear over time, such as high fever, strong and persistent headache, spots or red spots on the skin and joint pain. In the presence of these symptoms, it is important to go to the hospital or to the nearest emergency room so that the diagnosis can be made and the appropriate treatment started. Know how to recognize the symptoms of dengue.
In addition to evaluating the symptoms, the doctor recommends carrying out tests that help confirm the diagnosis of dengue, such as serological tests, blood tests and the tie test. See how the diagnosis of dengue is made.
Online Symptom Test
To assess whether the symptoms are indicative of dengue, select your symptoms in the test below:
- 1.Fever above 39º C Yes No
- 2. Nausea or vomiting Yes No
- 3.Constant headache Yes No
- 4.Pain in the back of the eyes Yes No
- 5.Red spots on the skin, all over the body Yes No
- 6.Excessive fatigue for no apparent reason Yes No
- 7.Pain in joints and bones Yes No
- 8.Bleeding from nose, eyes or gums Yes No
- 9.Pink, red or brown urine Yes No
Make an appointment with a specialist
How to prevent transmission
To avoid the transmission of dengue, it is important to adopt measures that help to prevent the development of the mosquito and, consequently, the disease. Therefore, it is important to take the following precautions:
- Turn bottles upside down;
- Put earth in the plant dishes;
- Keep tires sheltered from the rain, as they are the perfect environment for mosquitoes to develop;
- Always cover the water tank;
- Keep the yard free of standing water;
- Cover pools pools.
Also, if you have vacant land with standing water in your area, you must inform the city hall so that all puddles with standing water can be eliminated. It is also recommended to use protective screens on all windows and doors, in order to prevent the entry of mosquitoes, and it is also recommended to use repellent daily.