# Surge in West Nile and Dengue cases in Italy

> Live situation record from CLSTR: https://clstr.news/situations/dengue-fever-reports-and-mosquito-control-in-italy
> Updated: 2026-08-25T08:12:39.000Z. Sources: 37. Developments: 6.

Health authorities in Italy are responding to a surge in mosquito-borne illnesses, specifically West Nile and Dengue viruses. Recent reports indicate fatalities linked to West Nile, including an 85-year-old in Pavia and a 72-year-old in Qualiano. In the Lodi province, seven West Nile cases have been confirmed, with five identified as severe neuro-invasive forms.

Local governments have intensified emergency disinfection measures. In Monza, extraordinary disinfection is underway following a suspected Dengue case. In Guidonia Montecelio, new West Nile infections have triggered a second cycle of adulticide and larvicide treatments. In the province of Barletta-Andria-Trani, cases in Margherita di Savoia have prompted preventive disinfection in Trani and Trinitapoli.

Regional impacts continue to expand. Oristano has reported 24 West Nile cases, while Umbria has recorded a West Nile case in Castiglione del Lago and an imported Dengue case in Perugia. In Pescara, authorities are implementing preventive measures during public events. To mitigate transmission risks, health officials are urging citizens to use repellents, install window screens, and eliminate standing water.

## Timeline

### 2026-08-25: Italy faces surge in West Nile and Dengue virus cases

Italy faces a surge in West Nile and Dengue virus cases, prompting widespread emergency mosquito disinfection and public health warnings across multiple provinces to curb transmission.

13 sources. https://clstr.news/cluster/italy-launches-mosquito-control-following-dengue-and-west-nile-reports

### 2026-08-19: Italy implements mosquito control following suspected dengue case

Italian municipalities are implementing mosquito control measures, including adulticide spraying, following a suspected dengue fever case in Reggio Emilia and routine pest management in Albano Laziale.

3 sources. https://clstr.news/cluster/italy-implements-mosquito-control-following-suspected-dengue-case

### 2026-08-17: Castellarano resident diagnosed with Dengue fever

A Dengue fever case has been confirmed in Castellarano, Italy, following a resident's return from an endemic area. Local authorities have launched mosquito disinfection protocols.

5 sources. https://clstr.news/cluster/castellarano-resident-diagnosed-with-dengue-fever

### 2026-08-14: Health authorities launch mosquito control following viral outbreaks

Health authorities in Italy and Romania are launching mosquito control operations following reports of Dengue, Chikungunya, and West Nile virus cases to prevent local transmission.

14 sources. https://clstr.news/cluster/pisa-launches-emergency-mosquito-control-after-chikungunya-case

### 2026-08-13: Dengue fever cases confirmed in Tuscany and Ferrara

Dengue fever cases have been confirmed in Tuscany and Ferrara, Italy, following travel from abroad. Local health authorities have launched mosquito disinfection protocols to prevent local transmission.

2 sources. https://clstr.news/cluster/dengue-fever-cases-confirmed-in-tuscany-and-ferrara

### 2026-08-11: Italy initiates mosquito control following reported Dengue cases

Italian municipalities in Carisolo and Berra have launched mosquito disinfection protocols following reports of imported Dengue and other suspected mosquito-borne illnesses.

2 sources. https://clstr.news/cluster/italy-initiates-mosquito-control-following-reported-dengue-cases

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Cite as: Surge in West Nile and Dengue cases in Italy. CLSTR, https://clstr.news/situations/dengue-fever-reports-and-mosquito-control-in-italy