An infected dengue fever patient does not spread the virus that causes the disease to another person so it's not necessary to put the patient under quarantine, a Guam health official said.

"The dengue virus is spread through the bite of an infected mosquito, so the most effective way to prevent future cases is to eliminate mosquitoes that might bite infected persons and then spread the virus to uninfected persons," stated Ann Pobutsky, a territorial epidemiologist with the Department of Public Health and Social Services.

"Quarantines are extreme measures that are effective primarily for serious diseases spread by human-to-human contact," she added.

The best way to keep dengue from spreading is to eliminate places where mosquitos breed, she said. Containers that can collect rainwater and provide a breeding ground for mosquitoes should be removed, the department recommends.

All confirmed or suspected dengue fever patients on Guam are advised to stay indoors to reduce the risk of potential transmission of the virus via mosquitoes, Pobutsky said.

There are now three confirmed dengue cases on Guam in recent months. One patient acquired dengue locally, which is the first such recorded case on Guam in 75 years. Last month, the government recorded one dengue patient on Guam who got the virus in Palau. Another case came from Yap.

The neighboring Commonwealth of the Northern Mariana Islands also recently confirmed two imported cases of dengue fever. 

The U.S. Centers for Disease Control and Prevention recommends protective clothing, environmentally safe mosquito repellents and other ways to protect from mosquito bites.

Anyone with dengue symptoms, including high fever, ballpoint tip-like rashes, pain between the eyes and diarrhea are urged to see a doctor to get tested for dengue.

There is no direct cure for dengue, and antibiotics do not combat the virus, health organizations have stated. 

Mosquitoes that spread dengue typically bite from day to dusk, according to the CDC and the World Health Organization.

More severe cases of dengue fever can be fatal, authorities have said.