Sri Lanka Faces Worst Dengue Outbreak in Nearly a Decade
Sri Lanka is currently battling its most severe outbreak of mosquito-borne dengue in nearly a decade. Since the start of the year, health authorities have documented 76,044 infections and 53 deaths. The crisis is being driven by a more virulent strain of the virus, which has complicated treatment efforts and strained the nation’s healthcare system, leading the government to enlist the armed forces to help curb the spread.
Lalindra Dias Manages Patient Surge at Negombo District General Hospital
Hospital Strain and Rising Infection Rates
Public health services across the country are facing an intense surge in patients, with health authorities reporting an influx of more than 18,000 cases in the first two weeks of July alone. The scope of the current outbreak is highlighted by June statistics, which recorded 21,537 infections—more than double the figure reported in May. Symptoms for these cases are typically characterized by high fever, body aches, and a loss of appetite.
In Negombo, located roughly 35 km (22 miles) north of Colombo, medical facilities are struggling to manage the sudden surge. Consultant Lalindra Dias reported that his district general hospital treated nearly 1,800 patients in less than two months since June, a significant increase from the approximately 1,050 patients treated in 2025. It's challenging for the doctors because it's a rapid increase in patients,
Dias stated, noting that hospitals have rushed to add beds, convert wards, and increase the working hours of doctors and nurses to accommodate the ill.
The severity of the outbreak is compounded by the prevalence of the DENV-2 strain, which accounts for roughly 75% of current infections. Kapila Kannangara, acting director general of the National Dengue Control Unit, noted that public health staff are stretched to their limit
as they attempt to manage both the high volume and the clinical severity of these cases.
Sri Lanka Air Force Deploys Drones to Identify Mosquito Breeding Sites
Military Intervention and Surveillance Technology
To combat the outbreak, the government has integrated military resources into its public health strategy. Air Force drones are being utilized to monitor areas inaccessible to ground teams, specifically identifying stagnant water pools on rooftops that serve as primary mosquito breeding grounds. This surveillance is part of a broader cleanup campaign involving police and military officers who are inspecting homes, construction sites, and schools.
According to the health ministry, these efforts resulted in the clearance of nearly 11,000 mosquito breeding sites this month, with fines levied at more than 4,000 premises found to harbor them. This enforcement follows data from the National Dengue Control Unit tracking the positivity of vector larvae across different premises throughout the first half of the year.
National Dengue Control Unit Analyzes Larvae Positivity Data
Patient Care and Uncertain Forecasts
With hospitals under pressure, doctors are advising those with mild symptoms to recover at home. The doctor asked me to stay at home because my platelet count had not fallen too much,
said 23-year-old patient Shalini Aloka Perera. Then I did my treatment at home because there are too many patients in the hospitals.
The crisis is exacerbated by the lingering effects of cyclone Ditwah, which caused an estimated $1.4 billion in damage to critical infrastructure and healthcare facilities in late November. While the country historically maintains a relatively high ratio of four hospital beds per 1,000 people, the current surge threatens to overwhelm this capacity. Authorities are also considering the introduction of a vaccine, though experts have warned it may confer limited benefits due to the complexity of the virus and the circulation of several different strains.
Health officials hope for a plateau as monsoon rains weaken in August, though they caution that a second monsoon season starting in November could lead to a secondary spike in cases. For now, the medical community remains guarded about the timeline for containment. "Sometimes it will be a little longer than that."
Readers should consult qualified healthcare professionals regarding symptoms or concerns about dengue, as this information is for reporting purposes and does not constitute medical advice.
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