Hagåtña, Guam – The Department of Public Health and Social Services (DPHSS) received one (1) laboratory confirmed Dengue fever report, September 18, 2025. This is the first confirmed dengue case for 2025. Through epidemiologic investigation, DPHSS has determined that this is most likely an imported case.
As a reminder, dengue virus is transmitted through the bite of an infected mosquito and cannot spread directly from person-to-person. Those who live in, or travel to, an area where dengue is endemic are susceptible to infection from mosquito bites. Although dengue fever is not endemic to Guam, Division of Environmental Health advises that the island has the mosquito vector that can transmit the virus.
A person infected with dengue virus will have a fever for 2-7 days. During this time, the person can infect mosquitos with the virus. During the time an infected person has a fever, they should remain indoors and avoid being bitten by mosquitoes. See your healthcare provider if you experience any of the following symptoms of dengue fever:
• Fever,
• Aches and pains;
• Rash; and,
• Mild bleeding usually around the nose or gums.
Visit your nearest emergency room immediately if you experience any of the following symptoms of the severe form of dengue fever, referred to as Dengue Hemorrhagic Fever:
• Severe abdominal pain;
• Persistent vomiting;
• Significant bleeding;
• Lethargy or restlessness.
Help Stop the Spread of Dengue Virus
Take precautions to prevent mosquito bites by applying insect repellant and wearing light-colored long-sleeved shirts and pants. Mosquitoes carrying the virus favor smaller areas of still water. Individuals can assist in removing mosquito breeding sites by emptying or discarding items that can collect water.
For more information, contact DEH’s Mosquito Surveillance and Control Program at (671) 3009579 or email Niel Tirador, Environmental Public Health Officer I, at niel.tirador@dphss.guam.gov. ####