Sri Lanka has witnessed a significant surge in dengue fever cases this year, with numbers three times higher than in previous years. As of June 13, the National Dengue Control Unit (NDCU) reported 43,752 cases since the start of the year, compared to 591 and 2,302 cases during the corresponding period in 2022 and 2021. The Gampaha District had the highest number of cases, followed closely by Colombo. The Trincomalee district also experienced an upward trend in the number of patients.
Dr. Lahiru Kodituwakku of the NDCU said that the surge in the number of dengue cases can be attributed to several factors. The irregular rainfall from February to May had elevated the baseline for dengue cases this year. The predominant dengue sterotype has shifted to DENV-3, and human behaviour also plays a role.
Efforts to control the outbreak include routine prevention and control programs, surveillance initiatives, and vector surveillance. Collaboration with Local Government and community organisations aids in clean-ups and awareness campaigns.
Dr. Kodituwakku attributed the spike in the number of cases in Trincomalee to the abundance of breeding sites in wells. The World Mosquito Programme (WMP) introduced the Wolbachia method to combat mosquito-borne diseases. Pilot programs in specific areas have shown promise, and plans are under way to expand the program in the Colombo district.
Despite the challenges, the proactive measures taken by the Government, including the setting up of committees and engagement of experts, demonstrate a strong commitment to tackling the outbreaks of dengue and the Covid-19 pandemic, he added.