# West Nile virus surveillance in Spain

> Developing situation record from CLSTR: https://clstr.news/situations/west-nile-virus-surveillance-in-spain
> Updated: 2026-10-31T05:30:13.000Z. Sources: 7. Developments: 2.

Authorities in Spain have implemented various measures to monitor and control the West Nile virus through mosquito surveillance and vector control.

In Alhaurín de la Torre, the City Council and the Junta de Andalucía have intensified mosquito fumigation efforts following the municipality’s inclusion in an alert area. While mosquito carriers were detected near the population center, officials stated that no human transmission has been detected in the area. The response includes targeting high-risk zones near rivers and launching public awareness campaigns.

In Extremadura, the Extremadura Health Service and the University of Extremadura have launched a surveillance network involving mosquito traps at 11 locations. This initiative aims to detect the virus in insects before human cases emerge, responding to a rise in reported cases in the region from 13 in 2023 to 39 in 2025.

## Timeline

### 2026-10-31: Extremadura to monitor West Nile virus via mosquito traps

Extremadura is implementing a mosquito trap surveillance network at 11 locations to detect West Nile virus following a rise in regional cases.

2 sources. https://clstr.news/cluster/extremadura-to-monitor-west-nile-virus-via-mosquito-traps

### 2026-10-27: Alhaurín de la Torre intensifies mosquito fumigation efforts

Alhaurín de la Torre has intensified mosquito fumigation and surveillance following the detection of West Nile virus carriers in local traps, though no human cases have been reported.

5 sources. https://clstr.news/cluster/alhaurn-de-la-torre-intensifies-mosquito-fumigation-efforts

---
Cite as: West Nile virus surveillance in Spain. CLSTR, https://clstr.news/situations/west-nile-virus-surveillance-in-spain