JENSEN BEACH (AP) — If you are planning to head to up the coast, you may want to pack some bug spray.

A health advisory regarding a rare mosquito-borne illness has been issued for Martin and St. Lucie counties along with all of Jensen Beach.

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The advisory was issued when seven more cases of dengue fever were confirmed in those two counties.

Health officials said the illness is common in the Caribbean but has made its way to the U.S. through mosquito transmission. Now, mosquito control crews are working in the affected areas to prevent the disease from spreading.

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Dengue fever leads to fevers, headaches and muscle and joint soreness. Some cases result in a heavy, red skin rash that can look like measles.

Officials advise residents to drain any standing water, cover their skin with clothing or repellent and protect windows and doors with screens.

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