the primary autochthonous case of arbovirosis is an an infection with the Usutu virus

the primary autochthonous case of arbovirosis is an an infection with the Usutu virus

The Regional Well being Company declares that the primary suspected case of arbovirosis of autochthonous origin detected in New Aquitaine on October 18, is in actual fact an an infection with the Usutu virus, and never with dengue fever. It’s the second listed in France for this illness transmitted by birds to mosquitoes, which “doesn’t symbolize an actual hazard for people”. In rarer instances, comparable to in immunocompromised individuals, “it might probably trigger neurological issues”. Measures have been taken to restrict the chance of an infection.

On October 18, the Regional Well being Company (ARS) Nouvelle-Aquitaine introduced that it had noticed in Biscarosse (Landes) a primary case of autochthonous arbovirosis, that’s to say a illness transmitted by the tiger mosquito to an individual. not having traveled to high-risk areas.

Samples had been then to be taken with a view to know the origin of the an infection, the ARS fearing that it was a case of dengue fever. In keeping with the outcomes transmitted by the Nationwide Reference Heart for Arboviruses in Marseille (CNR Marseille), and communicated this Wednesday by the ARS, it’s the Usutu virus which is in query.

This arbovirus is extra particularly a Flavivirus, recognized for the primary time in South Africa in 1959, on the sting of the Usutu river, and reported in birds in Europe in 1996, with the primary human instances detected in Italy in 2009. In France, the virus has been circulating since 2015, however a single case of human an infection, with a positive evolution, was detected in 2016 in Occitanie (Hérault)”, specifies the ARS.

No hazard for people

The case of Biscarosse is due to this fact solely the second listed in France. In keeping with the ARS press launch of November 9, this virus is “protected” for people. Most often, the an infection is “asymptomatic or minimally symptomatic”. Extra not often, signs will be much like these of the flu. Applicable therapy can rapidly take care of this situation.

Nonetheless, the press launch warns immunocompromised individuals in whom the virus may trigger “neurological issues comparable to encephalitis or meningoencephalitis”.

The “low pathogenic” nature of the virus explains its restricted unfold for the second, and “the low variety of biologically confirmed instances”.

Transmission by mosquitoes

Initially, the virus circulates “among the many birds”. After biting a service hen, so-called “frequent” mosquitoes (completely different from the tiger mosquito) are contaminated and transmit it to people. They’re, nonetheless, keen on excessive temperatures, and the drop within the thermometer noticed in latest days ought to “gradual the circulation of the virus”, in response to the ARS which underlines that “Usutu shouldn’t be transmitted from individual to individual, nor from the person with the mosquito. »

Because the affirmation of the primary case of Arbovirosis on October 18, “a number of mosquito management operations, in collaboration with native authorities, have been carried out in doable locations of contamination frequented by the individual”.

From October 20 to 27, breeding websites had been destroyed and “evening spraying” carried out. In keeping with the press launch, “they’re tailored to be efficient in opposition to mosquito vectors of Flavivirus”.

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