Dengue: cases increase in the Southeast of the country

Dengue cases increased significantly in 2015. According to the Ministry of Health, January 2015 saw a 57% increase in cases compared to the same month in 2014. One of the reasons for this large increase is the water crisis , which affects mainly the Southeast region. With the reduction in supply, many people are accumulating water in buckets and water tanks, which favors the proliferation of the mosquito that transmits dengue, the Aedes aegypti .

understand dengue

Dengue is a viral disease transmitted by the bite of the Aedes aegypti mosquito . There are currently 4 serotypes of the virus in Brazil, DEN1, DEN2, DEN3 and DEN4, the latter being the most recently introduced variety. The mosquito is adapted to hot and humid regions and carries the virus and transmits it by sucking the patient’s blood. It lays its eggs in clean, still water and preferably away from light. In addition to dengue, the mosquito also transmits other diseases such as chikungunya fever and yellow fever.

After the bite, the incubation period (time between exposure and appearance of symptoms) varies between 3 and 14 days, and they usually appear within the first week of contagion. Characteristic symptoms include sudden-onset high fever, muscle and joint pain, fatigue, severe headache, and possible rash. Although many patients spontaneously improve after a few days, some people progress to a more serious case, dengue hemorrhagic fever, which can be fatal. At this stage, the patient has gastrointestinal and mucosal bleeding.

Treatment aims to improve symptoms with the use of antipyretics, analgesics and fluids to replace dehydration. If the person has suspected dengue, they should not consume products based on acetylsalicylic acid (such as aspirin), since this compound can increase bleeding.

Increase two cases not Southeast

The increase in dengue cases in the Southeast has been alarming. According to data from the Ministry of Health, there was an increase of 64% of cases in the city of São Paulo alone. A city in the State of São Paulo particularly affected by dengue is Sorocaba, in the interior of the state. About 22,000 cases have already been registered this year, which has caused great inconvenience to the public health network, which is unable to attend to all patients. Altogether, the State of São Paulo already concentrates more than half of the dengue cases across the country in 2015. The government assumes that the increase in incidence is due to inadequate water storage.

Dengue in other regions of the country

Other states on dengue alert include Acre, which has the highest incidence of the disease with 695.4 cases per 100,000 inhabitants, followed by Goiás (401 cases per 100,000 inhabitants). According to the Ministry of Health, Cuiabá is the only Brazilian capital at risk, however 18 others are on alert: Aracaju, Belém, Belo Horizonte, Campo Grande, Fortaleza, Goiânia, Macapá, Maceió, Manaus, Palmas, Porto Alegre, Porto Velho, Recife, Rio de Janeiro, Salvador, São Luís, São Paulo and Vitória.


The most efficient way to prevent dengue is to avoid the accumulation of clean water, especially in places sheltered from light. Some dengue mosquito reservoir sites include gutters, water tanks, potted plants, tires, buckets, empty cans, bottles, swimming pools, among others.

Check weekly in your yard or garden if there is no place that can accumulate rainwater. If you are adding water, make sure you always close the reservoir and keep it from being exposed. In the case of swimming pools, use cleaning products and, whenever possible, cover the surface.

Sanitary agents from municipal governments are visiting citizens’ homes to warn about dengue and give tips on how to interrupt the mosquito’s life cycle. If you have any doubts about this matter, go to the basic health unit in your neighborhood.

Also read:  10 tips to fight dengue – 10 questions about dengue

Jeanne Kenney
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I’m a stylist trainer, a content creator, and an entrepreneur passion. Virgo sign and Pisces ascendant, I move easily between my dreams, the crazy world I want, and my feet on the ground to carry out my projects.

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