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Photo via Pan American Health Organization.

Almost 10K dengue fever patients in Costa Rica

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Published on Monday, June 24, 2024
By the A.M. Costa Rica staff

So far this year, from January to May, about 9,945 cases of dengue fever were recorded by the Ministry of Health.

This statistic represents an increase of more than 7,300 infected people compared with the observed in the same period of 2023 when there were about 2,587 cases.

Alajuela Province had the most patients, with about 2,900 cases, followed by the provinces of Puntarenas with over 1,900 infected people and San José with about 1,300 patients.

The rest of the patients are from the provinces of Limón (over 840 cases), Guanacaste ( more than 800 patients), Cartago (over 750 cases) and Heredia with more than 430 patients.

Authorities state that personnel from the Vector Control Program have fumigated almost 55,000 homes where dengue infections are most common in Alajuela, San José and the rest of the provinces.

There have been no reported dengue-related fatalities.

Recently, the Pan American Health Organization (PAHO) warned about the surge in dengue cases in the Americas. As of March, over 3.5 million cases and more than 1,000 deaths have been reported in the region.

While dengue is on the rise throughout Latin America and the Caribbean, the hardest-hit countries are Brazil (83%), Paraguay (5.3%), and Argentina (3.7%), which account for 92% of cases and 87% of deaths. This increase is attributed to the higher transmission season in the southern hemisphere when the mosquito vector of dengue thrives due to warm and rainy weather.

Dengue causes flu-like symptoms and sometimes progresses to a life-threatening condition called severe dengue, formerly known as hemorrhagic dengue.

The virus is transmitted by the bite of an infected female Aedes aegypti mosquito. There are four types of the dengue virus: DEN 1, DEN 2, DEN 3 and DEN 4. Symptoms appear in 3–14 days, on average 4–7 days, after the infected bite. Dengue fever is a flu-like illness that affects infants, young children and adults.

There is no specific treatment for dengue fever. Severe dengue is potentially lethal, but early clinical diagnosis and careful clinical management may often save lives.

The only method to control or prevent dengue transmission is to fight against vector mosquitoes, authorities said.

Experts recommend the following precautionary measures to prevent the spread of the mosquito.

• Keeping a tidy home to prevent mosquitoes from finding places to lay their eggs.

• Properly removing solid waste and possible clean water deposits, no matter how small.

• Covering, emptying and cleaning water containers every week.

• Applying suitable insecticides to the containers in which water is stored outdoors.

• Using personal protection measures at home, such as window screens, long-sleeved clothing, repellents, insecticide-treated materials, coils and vaporizers.


Costa Rica closed 2023 with more than 26,400 cases of dengue fever.

What have you heard about people infected with dengue in your community? We would like to know your thoughts on this story. Send your comments to