France reports local transmission of Usutu virus infection


by NewsDesk Lord, save her

As part of the surveillance and vector control mission, the Agence Regionale de Santé Nouvelle-Aquitaine On 18 October (ARS) confirmed a case of arbovirosis in a person who had not left metropolitan France for some time before the first signs of the disease appeared.

Image/Robert Herrmann

This person frequented the regions of Biscarrosse and Parentis-en-Born in the Landes, as well as Bouscat, Pian-Médoc, and Bordeaux-Caudéran in the Gironde. So it was the Aboriginal issue.

The results of the first sample did not make it possible to determine with certainty the nature of the infection.

The dengue virus transmitted by the tiger mosquito has been suspected as well as West Nile, which in the meantime is transmitted by the Culex mosquito. For confirmation, a second sample was taken on 11 October 2022 from the infected person and sent to the National Arbovirus Reference Center in Marseille (CNR Marseille). The latter confirmed, on November 4, that it was a Usutu virus infection.

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Usutu virus (USUV) is an emerging virus of African origin, of the genus Flavivirus and family Flaviviridae. It is part of the Japanese encephalitis complex. It was first identified in South Africa, in Swaziland in 1959, at the edge of the Usoto River, and was reported in birds in Tuscany, Italy in 1996, and then in Hungary, Switzerland, Spain and Germany. In France, this virus is monitored in birds by the French Office for Biological Diversity.

In Europe, the first human cases of USUVU infection were detected in northern Italy in 2009 in immunocompromised patients.

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