Kathmandu: The Epidemiology and Infectious Diseases Control Division under Department of Health Services has confirmed the active presence of three types of dengue viruses in Nepal: serotype-1, serotype-2, and serotype-3.
Dr. Gokarna Prasad Dahal, Chief of the Division’s Vector Borne Disease Control Section, reported that these dengue serotypes have been identified through genetic studies of the virus. Previously, serotype-4 was also active, but current assessments indicate that only these three types are circulating.
Dr. Dahal warned that the risk of dengue fever remains elevated until mid-November (Kartik), as the mosquito vectors continue to thrive during this period. Following this time, the prevalence of dengue-transmitting mosquitoes is expected to decline with the onset of cooler temperatures.
As of now, all districts in Nepal, except Humla, have reported dengue cases, with the total exceeding 27,000 this year, resulting in 11 fatalities. Kaski district has recorded the highest incidence, with 7,080 cases, while the Kathmandu Valley has reported 5,748 cases.
In response to the outbreak, the government has initiated a “Larva Search and Destroy” campaign every Friday aimed at curbing the spread of the disease. Dengue is primarily transmitted by the Aedes aegypti and Aedes albopictus mosquitoes, which are most active during the morning and evening. These mosquitoes breed in stagnant water.
Historically prevalent in the Terai-Madhesh region, dengue has now spread throughout the country, including mountainous areas. Health officials caution that critical cases of dengue can lead to a significant drop in white blood cell counts, underscoring the importance of preventive measures and public awareness.
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