Arbovirus surveillance: first dengue virus detection in local Aedes albopictus mosquitoes in Europe, Catalonia, Spain, 2015

• Published in: Euro surveillance : bulletin européen sur les maladies transmissibles Vol. 23; no. 47; pp. 1 - 10
• Main Authors: Aranda, Carles, Martínez, Miguel J, Montalvo, Tomas, Eritja, Roger, Navero-Castillejos, Jessica, Herreros, Eva, Marqués, Eduard, Escosa, Raúl, Corbella, Irene, Bigas, Esther, Picart, Lluís, Jané, Mireia, Barrabeig, Irene, Torner, Núria, Talavera, Sandra, Vázquez, Ana, Sánchez-Seco, Mari Paz, Busquets, Núria
• Format: Journal Article
• Language: English
• Published: Sweden Centre Europeen pour la Surveillance Epidemiologique du SIDA (European Centre for the Epidemiological Monitoring of AIDS) 22-11-2018; European Centre for Disease Prevention and Control (ECDC)
• Subjects: Aedes - virology; Animals; Catalonia; Catalunya; Dengue; Dengue - blood; Dengue - diagnosis; Dengue - epidemiology; Dengue fever; Dengue Virus - genetics; Dengue Virus - isolation & purification; Disease Outbreaks; Disease transmission; Epidemics; Europe - epidemiology; Humans; Malalties víriques; Mosquito Vectors - virology; Mosquitoes; Mosquits; Public Health Surveillance - methods; Real-Time Polymerase Chain Reaction; Risk assessment; Spain; Surveillance and Outbreak Report; Travel; Virus diseases; Europe; Spain; Catalonia Spain; arbovirus surveillance; transmission; Ae. albopictus; Europe; dengue virus
• ISSN: 1560-7917; 1025-496X; 1560-7917
• DOI: 10.2807/1560-7917.es.2018.23.47.1700837

Dengue has emerged as the most important viral mosquito-borne disease globally. The current risk of dengue outbreaks in Europe appeared with the introduction of the vector
mosquito in Mediterranean countries. Considering the increasing frequency of dengue epidemics worldwide and the movement of viraemic hosts, it is expected that new autochthonous cases will occur in the future in Europe. Arbovirus surveillance started in Catalonia in 2015 to monitor imported cases and detect possible local arboviral transmission. During 2015, 131 patients with a recent travel history to endemic countries were tested for dengue virus (DENV) and 65 dengue cases were detected. Twenty-eight patients with a febrile illness were viraemic, as demonstrated by a positive real-time RT-PCR test for DENV in serum samples. Entomological investigations around the viraemic cases led to the detection of DENV in a pool of local
captured in the residency of one case. The sequence of the DENV envelope gene detected in the mosquito pool was identical to that detected in the patient. Our results show how entomological surveillance conducted around viraemic travellers can be effective for early detection of DENV in mosquitoes and thus might help to prevent possible autochthonous transmission.