Dengue fever is a mosquito-borne viral illness caused by the dengue virus, which is transmitted primarily by the Aedes aegypti mosquito. It is prevalent in tropical and subtropical regions around the world, including parts of Asia, Africa, Central and South America, and the Caribbean. Symptoms of dengue fever include high fever, severe headaches, joint and muscle pain, rash, and in some cases, bleeding or easy bruising. Severe forms of the disease, known as dengue hemorrhagic fever or dengue shock syndrome, can be life-threatening and require immediate medical attention.
Dengue is transmitted through the bite of an infected Aedes mosquito, which typically bites during the daytime, with peak activity in the early morning and late afternoon. The mosquito becomes infected when it bites a person already carrying the virus and can then spread the virus to others. Travelers visiting areas where dengue is endemic are at risk, particularly during the rainy season when mosquito populations are higher.
Preventing dengue fever relies on avoiding mosquito bites and reducing mosquito breeding grounds. Travelers should use insect repellent containing DEET or picaridin, wear long-sleeved shirts and pants, and stay in accommodations with air conditioning or screened windows. Sleeping under mosquito nets, especially in areas lacking proper screening, can further reduce risk. Additionally, reducing standing water around living areas helps prevent mosquitoes from breeding. While no specific antiviral treatment exists for dengue, early recognition of symptoms and supportive care, such as hydration and fever management, are essential. If traveling to high-risk areas, consult with a travel medicine specialist for advice and updates on preventive measures.
