Bali's Dengue Threat Shifts: Daytime Mosquito Activity Alarms Health Officials

JAKARTA, April 11 — A leading Indonesian epidemiologist has issued a direct warning to international visitors in Bali, noting a significant shift in the behavior of disease-carrying mosquitoes. Professor Gari Budiman told RIA Novosti that the Aedes mosquitoes, which transmit dengue and chikungunya viruses, are now biting aggressively during daylight hours, particularly in crowded tourist zones.

Historically, these insects were most active at dawn and dusk. The change, Budiman explains, appears to be a direct adaptation to human patterns. "We are seeing a shift in their active patterns," he stated. "The mosquitoes are adapting to an environment where people are out all day. Urbanization, climate shifts, and the constant presence of hosts could be factors."

This adaptation renders traditional precautions like bed nets and evening repellent sprays insufficient. Health officials report a rise in infections among tourists who only guard against bites after dark. "Many believe the danger exists only in the evening," Budiman noted. "But the risk is now present during the day—especially in shaded areas, near water, or in poorly ventilated rooms."

Dengue fever remains a primary infectious disease threat across Indonesia. Its symptoms include sudden high fever, severe headache, and intense muscle and joint pain, with potential for serious complications in severe cases. The professor's alert underscores a need for visitors to maintain protective measures—such as effective repellent and covered clothing—from morning until night.