May 30, 2024

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After more than 1,000 dengue outbreaks identified, Blumenau epidemiological surveillance issues alert

After more than 1,000 dengue outbreaks identified, Blumenau epidemiological surveillance issues alert

On Wednesday, the Epidemiological Surveillance Service of the Department of Health Promotion in Blumenau (CMOS) issued a warning note to health units in primary care. The announcement came due to the increase in the number of dengue fever cases registered in the municipality.

From January to date, clients have identified 1,608 outbreaks of the Aedes aegypti mosquito, which is responsible for transmitting dengue, yellow fever, Zika and chikungunya. In the same period last year, there were 1,177 outbreaks, which is a 35% increase in this period.

confirmed cases

The municipality has so far registered 269 notifications. Of these, 65 have been confirmed, with six imported and 59 original, that is, contracted in Blumenau.

Two residents of Blumenau who were diagnosed with dengue fever have been hospitalized in city hospitals. On March 7, a 33-year-old woman was diagnosed with the disease. On March 9, a 35-year-old man was diagnosed with the disease. The two patients are in hospital and are in a stable condition.

Currently, out of the city’s 35 neighborhoods, 17 are considered endemic and are monitored daily. They are: Água Verde, Centro, Do Salto, Escola Agrícola, Garcia, Fortaleza, Itoupavazinha, Itoupava Norte, Itoupava Seca, Jardim Blumenau, Ponta Aguda, Salto do Norte, Tribess, Velha, Velha Central, Vila Nova and Victor Konder.

50% of the pollution sites are concentrated in the Escola Agrícola neighborhood of the municipality. However, dispatch is also carried out in the neighborhoods of Garcia, Velha Itupava Norte, Agua Verde and Vila Nova.

Elimination of mosquito infestation

In January, endemic disease agents ramped up the use of ultra-low volume (UBV), known as smoke, in neighborhoods where there was a combination of two factors—the presence of the contaminated mosquito and the patient with a confirmed diagnosis.

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They wear a specific uniform that ensures the safety of the professionals, and they put out a “cloud” of smoke with low doses of pesticides that eliminate most adult mosquitoes. This measure was recommended by the Governmental Epidemiological Surveillance Committee (DIVE) in the control of the Aedes aegypti mosquito.

The municipality’s dengue control program has about 60 specialists working in the inspection and guidance of the population. Agents are identified with a uniform and a badge bearing the name and registration number of the professional designated by the City of Blumenau. Pictures of all agents are available on City Council website.

Signs and symptoms

The first manifestation of dengue fever is a rise in temperature (39° to 40°C) from a sudden onset, which lasts from two to seven days, and is associated with headache, weakness, body aches, joints and back.

In addition, spots appear on the body in 50% of cases, and they can affect the face, trunk, arms and legs. Loss of appetite, nausea, and vomiting may also occur.

People who show symptoms should seek care at ESF or AG units. Seeking care in case of suspicion makes it possible to avoid deterioration of the condition and even its progression to death.


Residents can also report places with potential mosquito outbreaks, by contacting the Dengue Control Program, through OuvidorSUS at phone 156 (option 4) or by phone 3381-7770.

Tips and precautions to prevent the spread of Aedes aegypti:

Remove standing water from all containers
Avoid using dishes in potted plants. If used, put sand on the edge
– Store the bottles with the neck facing down
Keep trash cans covered
– Always leave water tanks closed, without any openings, especially water tanks
Plants such as bromeliads should be avoided because they collect water
Treat the pool water with chlorine and clean it once a week
– Keep drains covered with mesh screens to prevent mosquitoes from accessing the site
– Wash containers with water deposits, such as food and water utensils for animals, with a brush or sponge and detergent, at least once a week
– If it is necessary to fill the container with water, as in the case of drains, use hypochlorite
Remove the accumulated water on the tiles
– Flush them at least once a week in toilets that are rarely used
Keep the toilet lid closed
Avoid the accumulation of debris, as it can become a focus for dengue mosquitoes

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