Schmallenberg virus detection in Culicoides biting midges in Spain: First laboratory evidence for highly efficient infection of Culicoides of the Obsoletus complex and Culicoides imicola

Pagès Nonito, Talavera Sandra, Verdún Marta, Pujol Núria, Valle M., Bensaïd Albert, Pujols Joan. 2018. Schmallenberg virus detection in Culicoides biting midges in Spain: First laboratory evidence for highly efficient infection of Culicoides of the Obsoletus complex and Culicoides imicola. Transboundary and Emerging Diseases, 65 (1) : e1-e6.

Quartile : Outlier, Sujet : VETERINARY SCIENCES / Quartile : Q2, Sujet : INFECTIOUS DISEASES

Résumé : Since Schmallenberg disease was discovered in 2011, the disease rapidly spread across Europe. Culicoides biting midges have been implicated as putative Schmallenberg vectors in Europe. The detection of Schmallenberg virus (SBV) in field collected Culicoides was evaluated through retrospective (2011–2012) collections and captures performed in 2013. This study represents the first detection of SBV in field collected Culicoides in Spain. Infectious midges were detected at the foothills of Pyrenees, Aramunt, in the summer 2012. All the specimens infected with Schmallenberg were of the species Culicoides obsoletus s.s. confirming its putative vector status in Spain. Experimental infection on field collected Culicoides provided evidence of atypical high efficiency for SBV vector infection and transmission potential in local populations of Culicoides imicola and in Culicoides of the Obsoletus complex. However, captured individuals of C. imicola were more susceptible to SBV infection than C. obsoletus s.l. (p < .001), with an infection ratio of 0.94 and 0.63, respectively. In contrast, a Culicoides nubeculosus colony appeared to be refractory to SBV infection.

Mots-clés Agrovoc : Culicoides, vecteur de maladie, Culicoides nubeculosus, Ceratopogonidae, infection, virose, résistance aux maladies, transmission des maladies, virus bluetongue, identification

Mots-clés géographiques Agrovoc : Espagne, Europe, Pyrénées

Mots-clés libres : Arbovirus, Culicoides, Infection, Outbreak, SBV, Vector, Vector competence

Agences de financement européennes : European Commission

Agences de financement hors UE : Directorate-General for Health and Consumers

Auteurs et affiliations

• Pagès Nonito, CIRAD-BIOS-UMR ASTRE (FRA) ORCID: 0000-0001-6020-7175 - auteur correspondant
• Talavera Sandra, CReSA (ESP)
• Verdún Marta, Universitat Autonoma de Barcelona (ESP)
• Pujol Núria, Universitat Autonoma de Barcelona (ESP)
• Valle M., CReSA (ESP)
• Bensaïd Albert, CReSA (ESP)
• Pujols Joan, CReSA (ESP)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/595508/)

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