Kathmandu: The Epidemiology and Infectious Diseases Control Division has reported that three types of dengue viruses—serotype-1, serotype-2, and serotype-3—are actively spreading across Nepal. This finding, confirmed by Dr. Gokarna Prasad Dahal, Chief of the Division’s Vector Borne Disease Control Section, indicates a complex challenge in managing the ongoing outbreak as these serotypes were identified based on a genetic study of the virus.

Nepal has seen an increase in dengue cases across the country, with more than 27,000 cases reported and 11 deaths this year. Every district except Humla has recorded cases, with Kaski district reporting the highest number at 7,080 cases, followed by 5,748 cases in the Kathmandu Valley.

Dengue transmission is expected to persist until mid-November as Aedes-aegypti and Aedes albopictus mosquitoes, which spread the virus, remain active. These mosquitoes thrive in stagnant water and are especially active during morning and evening hours. Dr. Dahal mentioned that as temperatures drop in the coming months, the mosquito population should gradually decline, reducing the risk of dengue.

In response, the government has implemented a "Larva Search and Destroy" campaign, held every Friday, to mitigate further spread by targeting mosquito breeding sites. This proactive approach is critical as dengue, once prevalent mostly in the Terai-Madhes region, has now spread to mountainous areas as well, highlighting a shift in its geographic reach.

Dengue’s impact on health can be severe, as it often leads to a reduction in white blood cell counts in critical cases. Public health authorities continue to urge the public to eliminate standing water around homes and communities to prevent mosquito breeding and reduce transmission risks.