The Department of Public Health and Social Services has received a confirmed report of dengue fever on Guam, the island’s first case of 2025.
Health officials have determined the individual was likely bitten by an infected mosquito before traveling to Guam.
Dengue is transmitted through the bite of an infected mosquito and can’t be spread directly from person to person. However, Guam has mosquitoes that can spread the virus by biting an infected person.
Someone with dengue will have a fever for two to seven days, during which time the virus can be spread to mosquitoes. The person should stay indoors until the fever has passed to avoid being bitten by mosquitoes.
Any symptoms of dengue, including fever, aches and pains, rash and mild bleeding around the nose and gums should be reported to a health provider.
You can avoid mosquito bites by using insect repellent and wearing light-colored long-sleeve shirts and pants. Remove potential mosquito breeding sites by emptying or discarding items that can collect water.