Dengue fever—known in Khmer as គ្រុនឈាម (Krun chheam)—remains a persistent threat in Cambodia, cycling through the nation’s humid years with a rhythm tied to climate, environment, and the ever-present bite of the Aedes mosquito. Each year, its arrival marks the rainy season, and despite decades of public health efforts, the disease still profoundly shapes Cambodian life and healthcare.
An Endemic Threat
Dengue is not a newcomer. In fact, Cambodia has endured cycles of outbreaks since records began, and major spikes have struck in years like 2007, 2012, and especially the 2019 epidemic, which saw over 68,000 reported cases. The disease is a viral infection transmitted by the bite of infected Aedes mosquitoes, which thrive in Cambodia’s monsoon climate. Four related viruses circulate in the region, each capable of triggering infection.
Rising Cases in 2025
The first half of 2025 has already seen ca. 8,800 dengue cases—a rise of almost 30% from the previous year. Tragically, most deaths reported this year have been among young children, a trend consistent with the disease’s tendency to affect the youngest and most vulnerable. The rainy season, from May to October, provides perfect breeding grounds for mosquitoes, feeding a fresh swell of infections each year.
Symptoms and Severity
Dengue begins innocuously, often mimicking the flu. Early signs include a sudden high fever, headache, eye pain, muscle and joint aches, nausea, vomiting, and a flat red rash across the skin. Occasionally, mild bleeding may occur—gums, nose, or easy bruising. For most, the illness resolves in under a week, but a small percentage progress to severe dengue, where capillary leakage, hemorrhage, shock, organ failure, and death can unfold with terrifying speed.
The Risk to Children
In Cambodia, dengue disproportionally affects children. The mean age of infection hovers under 10 years old, and children under five are most at risk for the most serious forms, including dengue hemorrhagic fever and shock syndrome. Delayed hospital visits, often due to lack of awareness or resources, can prove fatal. Officials urge families to seek medical attention within 48 hours of symptoms.
Rural and Urban Dynamics
Dengue spares no region, with highest official incidence in Siem Reap and Phnom Penh, followed by other wet, rice-growing provinces. But rural areas, where health infrastructure is often weaker, pay a heavier toll in undiagnosed cases and delayed care. The mosquitoes’ reproductive cycle is intimately linked to human water storage and the proliferation of small pools and containers, both in city and countryside.
Efforts and Challenges
Cambodia’s Ministry of Health and the National Dengue Control Program conduct annual campaigns: public education, community clean-ups, and chemical fogging. They urge families to eliminate stagnant water around homes, use bed nets, and bring children for prompt testing and care. Yet challenges abound. Outbreak cycles are driven higher by climate change, which expands mosquito habitats and prolongs the wet season. Rapid urbanization and population growth create dense, mosquito-friendly environments.
Treatment and Prevention
There is no specific antiviral treatment for dengue—care focuses on fluid replacement, fever reduction, and vigilant monitoring for complications. Severe cases require hospitalization, sometimes intensive care. Prevention rests on vector control and personal protection: minimizing mosquito breeding sites, using repellents, nets, and screens, and public health vigilance.
A dengue vaccine, Dengvaxia, is licensed in some countries, but its use remains limited and controversial, especially in populations without prior exposure. For Cambodia, the fight is still fundamentally rooted in awareness, local prevention, and early medical intervention.
Personal Stories and Social Impact
Every Cambodian family knows someone touched by dengue—often, it’s a child home from school, a neighbor suddenly taken to hospital, or the quiet mourning after the loss of a young life. The social impact ripples beyond health: parents miss work, farms go untended, and schools struggle with absenteeism during the peak season.
Community networks spring into action, driven by both necessity and solidarity. Village clean-up days, school awareness campaigns, and local radio messages sustain the ongoing fight, sometimes more effectively than top-down campaigns.
Looking Forward
The cycle of dengue ebbs and flows, but the challenge is unending. Cambodia continues to invest in surveillance, medical infrastructure, and education; but until broader changes curb mosquito populations and improve living conditions, dengue will remain part of Cambodia’s seasonal rhythm. With vigilance—both governmental and communal—each season brings hard-won lessons and renewed hope for a day when the bite of the mosquito no longer carries the shadow of fever.
