2026-04-17T03:49:03Zhttps://recercat.cat/oai/request

oai:recercat.cat:2072/4647882026-03-13T10:36:10Zcom_2072_98col_2072_378192

00925njm 22002777a 4500 dc Napp Avelli, Sebastián author Llorente, Francisco author Beck, Cécile author José Cunilleras, Eduard author Soler, Mercè author Pailler-García, Lola author Amaral, Rayane author Aguilera-Sepúlveda, Pilar author Pifarré, Maria author Molina-López, Rafael author Obón, Elena author Nicolás, Olga author Lecollinet, Sylvie author Jiménez-Clavero, Miguel Ángel author Busquets, Núria author 2021 The surveillance for West Nile virus (WNV) in Catalonia (northeastern Spain) has consistently detected flaviviruses not identified as WNV. With the aim of characterizing the flaviviruses circulating in Catalonia, serum samples from birds and horses collected between 2010 and 2019 and positive by panflavivirus competition ELISA (cELISA) were analyzed by microneutralization test (MNT) against different flaviviruses. A third of the samples tested were inconclusive by MNT, highlighting the limitations of current diagnostic techniques. Our results evidenced the widespread circulation of flaviviruses, in particular WNV, but also Usutu virus (USUV), and suggest that chicken and horses could serve as sentinels for both viruses. In several regions, WNV and USUV overlapped, but no significant geographical aggregation was observed. Bagaza virus (BAGV) was not detected in birds, while positivity to tick-borne encephalitis virus (TBEV) was sporadically detected in horses although no endemic foci were observed. So far, no human infections by WNV, USUV, or TBEV have been reported in Catalonia. However, these zoonotic flaviviruses need to be kept under surveillance, ideally within a One Health framework. West Nile virus Usutu virus Bagaza virus Tick-borne encephalitis virus Flaviviruses Spain Widespread Circulation of Flaviviruses in Horses and Birds in Northeastern Spain (Catalonia) between 2010 and 2019