West Nile Virus Lineage 2 Spreads Westwards in Europe and Overwinters in North-Eastern Spain (2017–2020)
Jiménez-Clavero, Miguel Ángel
West Nile virus lineage 2 (WNV-L2) emerged in Europe in 2004; since then, it has spread across the continent, causing outbreaks in humans and animals. During 2017 and 2020, WNV-L2 was detected and isolated from four northern goshawks in two provinces of Catalonia (north-eastern Spain). In order to characterise the first Spanish WNV-L2 isolates and elucidate the potential overwintering of the virus in this Mediterranean region, complete genome sequencing, phylogenetic analyses, and a study of phenotypic characterisation were performed. Our results showed that these Spanish isolates belonged to the central-southern WNV-L2 clade. In more detail, they were related to the Lombardy cluster that emerged in Italy in 2013 and has been able to spread westwards, causing outbreaks in France (2018) and Spain (2017 and 2020). Phenotypic characterisation performed in vitro showed that these isolates presented characteristics corresponding to strains of moderate to high virulence. All these findings evidence that these WNV-L2 strains have been able to circulate and overwinter in the region, and are pathogenic, at least in northern goshawks, which seem to be very susceptible to WNV infection and may be good indicators of WNV-L2 circulation. Due to the increasing number of human and animal cases in Europe in the last years, this zoonotic flavivirus should be kept under extensive surveillance, following a One-Health approach.
619 - Veterinària
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Aguilera-Sepúlveda, Pilar, Sebastián Napp, Francisco Llorente, Carlos Solano-Manrique, Rafael Molina-López, Elena Obón, Alba Solé, Miguel Ángel Jiménez-Clavero, Jovita Fernández-Pinero, and Núria Busquets. 2022. "West Nile Virus Lineage 2 Spreads Westwards In Europe And Overwinters In North-Eastern Spain (2017–2020)". Viruses 14 (3): 569. doi:10.3390/v14030569.
Grant agreement number
MINECO/Programa Estatal de I+D+I orientada a los retos de la Sociedad/E-RTA2015-00002-CO2-01/ES/Análisis de nuevos brotes de encefalitis por virus West Nile (Nilo Occidental) en España y su expansión geográfica/
INIA/Programa Estatal de generación del conocimiento y fortalecimiento científico y tecnológico del sistema I+D+I y Programa Estatal de I+D+I orientada a los retos de la sociedad/PID2020-116768RR-C21/ES/NUEVAS CEPAS EMERGENTES DE VIRUS WEST NILE: ANALISIS DE LA INFECCION EN HOSPEDADORES VERTEBRADOS Y SU PROPAGACION GEOGRAFICA/
INIA/Programa Estatal de generación del conocimiento y fortalecimiento científico y tecnológico del sistema I+D+I y Programa Estatal de I+D+I orientada a los retos de la sociedad/PID2020-116768RR-C22/ES/DETERMINACION DEL PAPEL DE MOSQUITOS VECTORES Y OTROS FACTORES EN LA TRANSMISION DEL VIRUS WEST NILE/
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