West Nile virus is an Arbovirus transmitted to humans through the bite of an infected mosquito West Nile virus is a viral infection transmitted to humans through the bite of an infected mosquito. Human infection is asymptomatic in over 80% of cases; in the remaining 20%, the symptoms are those of a pseudo-influenza syndrome. In 0.1% of all cases, the viral infection may trigger neurological symptoms resembling those of meningitis or meningoencephalitis. National and international scientific evidence has demonstrated the effectiveness of systematic surveillance to capture vector mosquitoes and active surveillance of wild birds to provide early information on the circulation of West Nile Virus.
Timely detection of viral circulation is crucial for the immediate activation of measures to prevent transfusion-related transmission of WNV.
Measures (IT text)
14/05/2025 – Indicazioni per la sorveglianza e la prevenzione della trasmissione del West Nile Virus e Usutu mediante la trasfusione di emocomponenti labili nella stagione estivo-autunnale 2025
Allegato 1 – Attivazione delle misure di prevenzione della trasmissione trasfusionale del WNV 2025
Allegato 2 – Gestione degli esiti del test di screening per WNV
Allegato 3 – Piano nazionale di prevenzione, sorveglianza e risposta alle Arborivirosi 2020-2025
Allegato 3a – Aggiornamento/rimodulazione per l’anno 2025 del Piano Regionale di Pre-venzione, sorveglianza e risposta alle Arbovirosi