What are the risks ?

According to the EID (Interdepartmental Establishment of Mosquito Control of the Atlantic coast), a case of dengue was diagnosed in Ambès, a town in the south-west of France, very close to Bordeaux. France 3 Aquitaine states that this is a case imported from Benin, that is to say that the person was bitten by a mosquito outside of Metropolitan France.

From May 1st to July 6th, 2018, 60 imported cases of dengue were listed by the INVS, of which 22% had stayed on Reunion Island, and 5 concerned persons living in New Aquitaine. A dengue epidemic is currently occurring in Reunion Island, with 4,604 cases (biologically confirmed or probable) reported between the beginning of the year and June 12, 2018.

Deltamethrin treatment

"This night, the first treatment with deltamethrin was done by the teams of the EID.I wonder why the County Council, the Prefecture, the ARS and the DDTM opt for a cure and highly toxic in the middle of the urban area rather than biological preventive treatment in the marshes, which would have lowered the vector density and thus limit the potential spread of diseases, will that be enough for our major authorities to finally open their eyes and take into account the opinion of the local elected representatives? ", indignant the mayor of the mayor of Ambès, Kevin Subrenat.

A prefectural decree was taken at the beginning of the week in Gironde. He authorized on the night of Monday to Tuesday a spread of deltamethrin, a product that allows the eradication of mosquitoes, within a radius of 300 meters around the area of ​​housing concerned.

Dengue fever can be fatal

Remember that dengue fever can be deadly. In New Caledonia, a six-month-old girl pbaded away in the evening of Saturday 19 May in Nouméa due to the deterioration of her general condition. "The infant's parents had taken him to the Koutio Medipole," a government statement said. Despite intensive care, the evolution of the disease was overwhelming. Declared in New Caledonia on February 22, the dengue epidemic had already carried off a 74-year-old woman, with no particular medical history.

Dengue, also known as "tropical flu," is a tropical haemorrhagic fever linked to an arbovirus, transmitted by the bite of a female tiger mosquito only. The World Health Organization (WHO) estimates that there are 50 million annual cases worldwide, including 500,000 cases of dengue "haemorrhagic", that is, which are fatal in more than 2.5% cases. Dengue fever is initially present in tropical and subtropical areas of the world

Symptoms of dengue fever

Symptoms of dengue occur after 3 to 14 days (on average 4 to 7 days) after infective bites . Influenza-like illness occurs in infants, young children and adults. There is no specific treatment. While dengue haemorrhagic fever is a life-threatening complication, early clinical diagnosis and rapid clinical management can often save lives.

"If you're infected with measles, you're immune for life," says Henrik Salje, statistician and epidemiologist in the Mathematical Modeling of Infectious Diseases unit at the Pasteur Institute, with dengue, it's different, if you are infected with one of the dengue viruses, you get immunized against This virus, but not against the other three, and during a second infection, by another form of the virus, people are more likely to become very sick. "

Adapted vaccination strategy against dengue fever

thus very complicated to define a suitable vaccination strategy against dengue fever. To achieve this, researchers at the Pasteur Institute recently decided to study with fresh eyes the detailed data of a cohort of Thai patients between 1998 and 2003 by researchers at the University of Buffalo and Walter Reed. For this, they developed a mathematical model and made-to-measure statistics. The cohort in question collects data for 3,451 children in a rural area of ​​northern Thailand. They had a blood test every 90 days for 5 years, which allowed researchers to have access to their antibody level over time. These children were also closely monitored to see if they had the symptoms of dengue fever.

All these data combined then fed into the model developed by the team and badociated, after treatment Sophisticated statistics, antibody levels at a higher risk of complication. "Characterizing individual risks will help to monitor populations in the same way and determine when a population may be collectively at risk for high rates of dengue fever," says co-author and professor Derek Cummings. of Biology at the University of Florida.