A young man from Nea Alikarnassos is hospitalized at Heraklion University Hospital after testing positive for West Nile virus, the fourth locally acquired and fifth overall case recorded in Crete this year, Nea Kriti reported.
The case is drawing particular attention because it was identified within the urban area of Heraklion, rather than in a rural location.
According to information reported by Nea Kriti, the man has been hospitalized for several days in the Internal Medicine Department of the University Hospital of Heraklion. His condition has stabilized, and the hospital’s Clinical Virology Laboratory confirmed the infection through laboratory testing.
Health authorities are now investigating the area around Nea Alikarnassos, as well as the area where the patient works, as part of the tracing process.
Previous cases recorded on Crete had been associated with rural areas where conditions favorable to mosquito activity were identified, including wetlands, stagnant water and the presence of migratory birds.
The latest case is different because it has been identified within the urban fabric of Heraklion.
Antonis Papadakis, head of Public Health for the Region of Crete, told Nea Kriti that the location requires further investigation to determine where the infection may have occurred and whether other potential mosquito breeding or transmission sites exist in the area.
He said the Region has already contacted the contractor responsible for mosquito control and that spraying operations and public information efforts are expected to begin in the area.
Leaflets will also be distributed to residents.
Authorities are considering placing mosquito traps to determine whether infected mosquitoes are present locally. According to the report, any traps would need to be positioned in locations safe for the public because of how the equipment operates.
Clinical Virology Laboratory Remains on Alert
George Sourvinos, director of the Clinical Virology Laboratory at the University Hospital of Heraklion, said the laboratory remains on alert and continues to provide information needed by the Region’s public-health authorities.
The laboratory is reportedly receiving at least five samples for testing each day.
The new case comes after five days without another reported case, which health officials describe as a cautiously encouraging sign. At the same time, authorities remain on alert as mosquito activity continues into September and early October.
The national picture is also worth noting. EODY has warned that West Nile virus circulation has been particularly intense during the 2026 transmission season, with case numbers substantially higher than in previous years for the same period.
EODY says the virus is transmitted mainly by bites from infected mosquitoes, which acquire it mainly from infected birds. Most people infected with West Nile virus develop no symptoms or only mild illness, while a small proportion develop serious neurological disease.
What Heraklion Residents Should Do Now
This is the part I would put prominently in the article, because people need something useful rather than simply another frightening headline.
EODY recommends:
- Use an approved mosquito repellent on the body and appropriate mosquito-control products indoors, following their instructions.
- Use window screens and mosquito nets where appropriate.
- Use air conditioning or fans.
- Wear longer clothing when possible, particularly during periods of mosquito activity.
- Check balconies, gardens, yards, terraces and other outdoor areas for standing water.
- Empty, cover or turn over anything that collects water, and change water in containers at least once a week.
- Keep gutters and drains clean.
And this last point is particularly relevant after what we’re seeing in Heraklion:
Don’t assume that because you live in an urban neighborhood, you’re outside the risk area.
EODY specifically recommends mosquito protection throughout Greece during mosquito season, because the areas where the virus will circulate in the coming weeks cannot be predicted with certainty.
One case does not mean that Nea Alikarnassos is experiencing an outbreak. It does mean that authorities have identified a locally acquired infection in an urban area and are investigating where exposure may have occurred.
And for everyone in Heraklion, the practical message is simple: don’t panic, but don’t ignore the mosquitoes either.