Dengue: the causes

It is a virus, of the arbovirus family, which is involved in dengue fever.
This is transmitted via a vector, a mosquito called Aedes Aegypti, but also Aedes albopictus (the tiger mosquito), involved in the transmission of dengue fever.

It is the sting of an infected female mosquito that contributes to the spread of the disease. It collects the virus circulating in the blood when it bites an infected person, then spreads it by pricking other people.

Formerly restricted to Southeast Asia, dengue now extends to all tropical and subtropical regions, particularly in Africa, Latin America, the Caribbean and the Pacific Ocean, with a predilection for urban and semi-urban areas.

The number of infected people has increased significantly in recent decades.

The resurgence of the disease is due to the emigration of populations to cities where mosquitoes can spread in certain neighborhoods. In question: the lack of hygiene, with the bins not evacuated, drinking water stored in drums colonized by female mosquitoes ...

Unlike other mosquitoes (as for malaria), the dengue vector mosquito feeds during the day, with a peak of activity early in the morning and in the evening before dusk. During each of these periods, the female stings multiple people. This is why the prevention of dengue fever, in endemic areas, protects against mosquitoes during the day.

The tiger mosquito in pictures:

Popular Posts

Category Diseases, Next Article

Migraine: the causes - Diseases

Migraine: the causes

The causes of migraine are still poorly understood even though specialists have made great strides in understanding the mechanism that triggers pain. We know that it is often a family affection that can skip a generation or two. During a migraine attack, there is hyperactivity of the neurons located deep in the brain (brainstem), observed in Pet-scan
Read More
Scarlet fever - Diseases

Scarlet fever

Scarlet fever, also known as scarlet fever, was one of the most feared childhood diseases until the beginning of the 20th century. It has become rare in France and affects mainly children aged five to ten during winter periods. Scarlet fever most commonly occurs in schools and other communities through epidemics
Read More
Hepatitis B: the causes - Diseases

Hepatitis B: the causes

The cause of hepatitis B is a liver disease linked to contamination by a DNA virus. It is a sexually transmitted disease (STD), that is, it can sometimes be transmitted during sexual intercourse. The secretions or body fluids through which contamination can occur are: blood, sperm, vaginal secretions, fluids from a wound
Read More
Malaria: Sources and notes - Diseases

Malaria: Sources and notes

- Item n ° 99: Malaria, Pilly - Preparation ECN - Item 99 - College of University of Infectious and Tropical Diseases. - E-Pilly Trop, Infectious and Tropical Diseases, 2012 Web edition, University College of Infectious and Tropical Diseases.
Read More