Mosquito menace looms as monsoon intensifies

Heavy rains in the evenings and intense heat in the daytime are exacerbating the risk of dengue, malaria and other vector-borne diseases across the country.

With more rainfall predicted this monsoon compared to preceding seasons, health authorities are urging the public to take preventive measures to avoid potential outbreaks.

Data from the World Health Organization show that dengue—an illness transmitted through the bite of the Aedes aegypti mosquito infected with dengue virus (DENV)—afflicts 100m-400m people around the world every year.

According to government statistics, Nepal saw one of its worst dengue outbreaks in history, with 52,557 confirmed cases and 60 deaths, in 2022. While the numbers dropped in 2024, the Epidemiology and Disease Control Division (EDCD) reported 34,385 cases and 13 deaths, affecting 76 districts across the country. 

Aware of a serious threat to public health arising from the vector-borne disease, the government has already implemented a regular surveillance and monitoring system through an early warning and reporting mechanism.

At the same time, it has strengthened integrated vector management strategies for mosquito surveillance with the objective of controlling vectors that transmit diseases like malaria, dengue and zika. These strategies combine various control methods, including biological, chemical, environmental and public health education, to optimize resource use and achieve sustainable vector control.

The EDCD has projected that more than 60,000 people could contract dengue across the country this year, and prepared an action plan to mitigate possible outbreaks.

The EDCD’s estimate is based on past trends, climatic conditions and the early onset of cases this year. The division is currently coordinating with local governments and health institutions to strengthen surveillance, awareness campaigns and vector control measures.

Authorities are urging the public to remain vigilant and take preventive measures, such as eliminating mosquito breeding sites and using protective clothing as well as repellents.

Minister for Health and Population Pradip Paudel has recommended halting construction works for four months—from July to October—to control dengue and save lives. 

Minister Paudel also emphasized the importance of a cleanliness campaign to eliminate mosquito breeding grounds and asked all to join it. He stated that raising awareness is key to preventing the spread of dengue. “It is essential to inform the public and work together,” he said. Minister Paudel urged everyone to keep their surroundings free of dengue larvae to protect themselves and others. He also asked citizens to take part in regular sanitation efforts every Friday, from July to October.

Dr Anup Subedi, an infectious disease specialist, emphasized the importance of raising awareness to prevent the spread of dengue. “While awareness programs are going on, the government, local authorities and communities must work together to make them effective,” he said: In particular, the government must remain vigilant, as we expect a rise in dengue cases this season.

Dr Subedi warned that the current period is a transitional phase, with changing weather and noticeable climate shifts. “The peak season for the spread of dengue has not arrived yet. When it arrives, we fear that more people will suffer—possibly for a prolonged period because of the climatic shift,” he added.

Using bed nets, applying mosquito repellent creams for short-term protection, keeping the surroundings clean and removing stagnant water are some of the effective ways to reduce the risk of dengue and other mosquito-borne diseases.

Dr Subedi noted that dengue can come with a variety of symptoms. “Not all cases require hospital visits. For minor symptoms like headaches and body aches, people don’t need to visit hospitals. They can take care of their health at home by taking paracetamol and staying well-hydrated with fluids such as pulses, soup, juice and other liquids,” he said.

Dr Subedi added, “Some cases require medical attention. If someone experiences persistent fever and severe body pain for more than 3-4 days, they should visit a hospital as soon as possible and consult a doctor. In more serious cases, dengue can affect internal organs such as the lungs and pancreas.”

Though rare, severe dengue can lead to serious complications such as acute pancreatitis and acute respiratory distress syndrome (ARDS), affecting the pancreas and lungs. These conditions may result from direct viral damage, immune responses or plasma leakage. Symptoms like abdominal pain and fever can delay diagnosis, and even if fever subsides, dengue should still be suspected in patients showing other symptoms associated with the disease. In severe cases, especially dengue hemorrhagic fever, organ damage and respiratory failure may occur, emphasizing the need for early recognition and medical attention.

Dengue rapid test kits available at government health institutions can help with timely diagnosis that is so crucial in saving lives. Furthermore, the EDCD has approved and published a comprehensive dengue prevention and control action plan on the occasion of World Neglected Tropical Diseases Day 2025.

With the rise of dengue patients in the hospital, labs and most hospitals take this as an opportunity to take benefit from the citizens. Addressing the issue, Minister Paudel stated, “We will try to make dengue testing free and if that’s not possible, we will set a fixed rate. He warned against fleecing the poor and suffering people in the name of testing.

 

Minister Paudel admitted that the government needs to do more on the dengue control front, adding that it is preparing to collaborate with the media for disseminating relevant information among the public.