securite
Updated 2026-07-29 5 min
In short
- ●Cambodianess analysis identifies key social and environmental factors in the spread of dengue in Cambodia.
- ●Rapid urbanization, population mobility, and water storage practices are highlighted.
- ●Expats in Siem Reap are urged to strengthen individual and collective protection measures.
- ●No official announcement of a new outbreak, but increased vigilance is recommended.
~15,000
Dengue cases in 2025
2024-2026
Analysis period
Cambodia (urban and rural)
Location(s)
Cambodianess
Source
Key Facts at a Glance
- Multiple factors. The analysis shows that climate alone does not explain dengue outbreaks; social and environmental factors play a major role.
- Urbanization. Rapid city growth creates favorable conditions for mosquito vector breeding.
- Mobility. Frequent population movements facilitate virus spread between areas.
- Water storage. Uncovered household water containers provide mosquito breeding sites.
- Prevention. Health authorities recommend targeted measures beyond conventional vector control.
How It Happened
The study published by Cambodianess is based on epidemiological data and field observations over several years.
- 2024: Increase in dengue cases in several provinces despite normal climatic conditions.
- Early 2025: Researchers begin investigating non-climatic factors.
- Mid-2025: First correlations established between rapid urbanization and epidemic hotspots.
- Late 2025: Seasonal worker mobility identified as a vector of spread.
- Early 2026: Preliminary results published in local journals.
- July 2026: Cambodianess article synthesizes findings and alerts the public.
- Next steps: Targeted awareness campaigns and recommendations to local authorities.
Breakdown
The identified factors vary by geographic area and population segment.
| Segment | Main Factor | Estimated Impact |
|---|---|---|
| Dense urban areas | Stagnant water in constructions | High |
| Rural areas | Uncovered water storage | Medium to high |
| Mobile populations (workers) | Travel between provinces | Moderate |
| Peri-urban neighborhoods | Poor sanitation | High |
| Expats in Siem Reap | Daytime exposure (Aedes mosquito) | Moderate |
What This Means for Siem Reap
- Increased risk in residential areas with gardens or water reservoirs.
- Need to check for larval habitats around your home.
- Frequent travel between Siem Reap and other provinces raises the risk of virus importation.
- Daytime outdoor activities (temple visits, markets) increase exposure to bites.
- Local authorities may intensify fumigation campaigns in high-expat-density neighborhoods.
How to Stay Safe
- Eliminate standing water: Empty and clean flower pot saucers, buckets, and any containers that can hold water weekly.
- Use repellents: Apply repellent containing DEET or icaridin to exposed skin, especially during the day.
- Wear long clothing: Opt for long sleeves and pants, preferably permethrin-treated.
- Install mosquito nets: Sleep under an insecticide-treated net, even if using air conditioning.
- Monitor symptoms: Sudden fever, severe headache, joint and muscle pain. See a doctor promptly.
- Report risk areas: Inform your landlord or local authorities about garbage dumps or standing water in your neighborhood.
- Stay informed: Follow health alerts via official channels and expat groups.
Frequently asked questions
What are the main hidden factors of dengue in Cambodia?
Rapid urbanization, population mobility (especially seasonal workers), and domestic water storage practices are key factors beyond climate.
Is dengue more dangerous for expats?
Expats who have not been previously exposed may develop more severe forms. Prevention is essential.
When are vector mosquitoes most active?
Aedes mosquitoes, vectors of dengue, bite mainly during the day, with peaks at dawn and late afternoon.
Is there a dengue vaccine available in Cambodia?
The Dengvaxia vaccine is available but only for people with a prior confirmed infection. Consult a doctor.
What to do if you have dengue symptoms?
See a doctor immediately. Rest, stay hydrated, and avoid aspirin or ibuprofen. A blood test will confirm the diagnosis.
Free expat guide
Visa, housing, health — in your inbox.
🧭
Published by
Siem Reap Hub
The community guide for expats and travelers in Siem Reap, Cambodia