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Field-captured Aedes vexans (Meigen, 1830) is a competent vector for Rift Valley fever phlebovirus in Europe.
Birnberg, Lotty; Talavera, Sandra; Aranda, Carles; Núñez, Ana I; Napp, Sebastian; Busquets, Núria.
Afiliación
  • Birnberg L; Centre de Recerca en Sanitat Animal (CReSA), Institut de Recerca en Tecnologies Agroalimentaries (IRTA), Barcelona, Spain.
  • Talavera S; Centre de Recerca en Sanitat Animal (CReSA), Institut de Recerca en Tecnologies Agroalimentaries (IRTA), Barcelona, Spain.
  • Aranda C; Centre de Recerca en Sanitat Animal (CReSA), Institut de Recerca en Tecnologies Agroalimentaries (IRTA), Barcelona, Spain.
  • Núñez AI; Servei de Control de Mosquits del Consell Comarcal del Baix Llobregat, Barcelona, Spain.
  • Napp S; Centre de Recerca en Sanitat Animal (CReSA), Institut de Recerca en Tecnologies Agroalimentaries (IRTA), Barcelona, Spain.
  • Busquets N; Centre de Recerca en Sanitat Animal (CReSA), Institut de Recerca en Tecnologies Agroalimentaries (IRTA), Barcelona, Spain.
Parasit Vectors ; 12(1): 484, 2019 Oct 16.
Article en En | MEDLINE | ID: mdl-31619269
ABSTRACT

BACKGROUND:

Aedes vexans (Meigen) is considered a nuisance species in central Europe and the Mediterranean region. It is an anthropophilic and mammalophilic floodwater mosquito involved in the transmission of several arboviruses. Rift Valley fever (RVF) is a relevant mosquito-borne zoonosis, affecting mainly humans and ruminants, that causes severe impact in public health and economic loses. Due to globalization and climate change, the European continent is threatened by its introduction. The main purpose of the present study was to evaluate the vector competence of a European field-collected Ae. vexans population.

METHODS:

Aedes vexans field-collected larvae were reared in the laboratory under field-simulated conditions. To assess the vector competence for Rift Valley fever phlebovirus (RVFV) transmission, adult F0 females were exposed to infectious blood meals containing the 56/74 RVFV strain. Additionally, intrathoracic inoculations with the same virus strain were performed to evaluate the relevance of the salivary gland barriers. Natural circulation of alphavirus, flavivirus and phlebovirus was also tested.

RESULTS:

To our knowledge, an autochthonous Ae. vexans population was experimentally confirmed as a competent vector for RVFV for the first time. This virus was capable of infecting and disseminating within the studied Ae. vexans mosquitoes. Moreover, infectious virus was isolated from the saliva of disseminated specimens, showing their capacity to transmit the virus. Additionally, a natural infection with a circulating Mosquito flavivirus was detected. The co-infection with the Mosquito flavivirus seemed to modulate RVFV infection susceptibility in field-collected Ae. vexans, but further studies are needed to confirm its potential interference in RVFV transmission.

CONCLUSIONS:

Our results show that field-collected European Ae. vexans would be able to transmit RVFV in case of introduction into the continent. This should be taken into consideration in the design of surveillance and control programmes.
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Texto completo: 1 Colección: 01-internacional Banco de datos: MEDLINE Asunto principal: Fiebre del Valle del Rift / Virus de la Fiebre del Valle del Rift / Zoonosis / Aedes / Mosquitos Vectores Límite: Animals / Female / Humans País/Región como asunto: Europa Idioma: En Revista: Parasit Vectors Año: 2019 Tipo del documento: Article País de afiliación: España

Texto completo: 1 Colección: 01-internacional Banco de datos: MEDLINE Asunto principal: Fiebre del Valle del Rift / Virus de la Fiebre del Valle del Rift / Zoonosis / Aedes / Mosquitos Vectores Límite: Animals / Female / Humans País/Región como asunto: Europa Idioma: En Revista: Parasit Vectors Año: 2019 Tipo del documento: Article País de afiliación: España