Weekly updates: 2019 West Nile virus transmission season


Situation update

Between 6 and 12 September 2019, EU Member States reported 42 human cases in Greece (15), Italy (10), Romania (8), Hungary (4), Austria (2), Cyprus (2) and Slovakia (1). This is the first case of autochthonous human West Nile virus infection reported from Slovakia. All other human cases in the EU were reported from areas that have been affected during previous transmission seasons. EU neighbouring countries reported eight cases in Serbia (6) and North Macedonia (2). Human cases were reported for the first time in Skopsi, North Macedonia. This week, seven deaths were reported by Greece (5), Italy (1) and North Macedonia (1).

In the same week, nine outbreaks among equids were reported to the Animal Disease Notification System (ADNS) by Germany (3), Austria (2), France (2), Hungary (1) and Italy (1).

Since the beginning of the 2019 transmission season and as of 12 September 2019, EU Member States and EU neighbouring countries reported 291 human infections. EU Member States reported 268 cases in Greece (171), Romania (33), Italy (24), Cyprus (16), Hungary (15), Bulgaria (4), Austria (3), France (1) and Slovakia (1). EU neighbouring countries reported 23 human cases in Serbia (13), Turkey (7) and North Macedonia (3).

To date, 27 deaths due to West Nile virus infection have been reported by Greece (19), Romania (3), Italy (2), Cyprus (1), North Macedonia (1) and Serbia (1).

During the current transmission season, 26 outbreaks among equids have been reported by Greece (12), Germany (4), Italy (4), Hungary (2), France (2) and Austria (2). In addition, Germany reported 26 outbreaks among birds to ADNS.

Data from the ECDC surveillance Atlas

Weekly updates

Case definition

EU case definition for diagnosing and reporting West Nile virus infection, under Decision No 2119/98/EC of the European Parliament and of the Council.

ECDC publishes weekly WNV epidemiological updates during the WNV transmission season, including the geographical distribution of human cases in the EU/EEA and EU neighbouring countries. In addition, ECDC includes maps in its epidemiological updates highlighting areas where WNV outbreaks among equids have been reported. Read more