Porto Alegre Health Surveillance issues epidemiological alert on indigenous cases of dengue fever in the city

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Of the 45 neighborhoods that have traps in the surveillance system, 25 have a heavy infestation of the Aedes aegypti mosquito.

Photo: Patricia Coelho/SMS PMPA

Of the 45 neighborhoods that have traps in the surveillance system, 25 have a heavy infestation of the Aedes aegypti mosquito. (Photo: Patricia Coelho/SMS PMPA)

The confirmation of three autochthonous cases of dengue in Porto Alegre, added to the favorable weather conditions for the transmission of the disease, led the EVDT (Communicable Diseases Surveillance Team) of the SMS (Municipal Health Service) to launch an epidemiological alert to the Porto Alegre Health Services Network this Thursday (24).

In the document, the EVDT alerts health professionals to suspected arboviruses (diseases transmitted by insects), when treating cases with symptoms compatible with the diseases, such as fever lasting a maximum of seven days, accompanied by at least two of the following symptoms: red spots on the skin, headache, muscle pain, joint pain, pain behind the eyes, nausea, vomiting, leucopenia (by laboratory test), redness of the eyes.

According to nurse Raquel Rosa, head of the health surveillance management team, professionals should also take into account the “similarity of symptoms with covid-19, which can mask the suspicion of arbovirus, delay the diagnosis and the timely adoption of preventative environmental control measures”. , he points out.

In 2022, up to epidemiological week 07 (02/01 to 19/02/22), 23 suspected cases of dengue were reported among the inhabitants of Porto Alegre. Of these, three cases have been confirmed, all indigenous (contracted in the city). There was also confirmation of a case of chikungunya, imported from Manaus. In 2021, at the same time, an imported case of dengue was confirmed. Over the past year, 83 dengue fever cases have been confirmed in Porto Alegre, including 65 indigenous and 18 imported.

This Thursday, DVS Environmental Surveillance carried out three operations to block viral transmission, with the application of insecticide, in part of the Morro Santana, Jardim Carvalho and Bom Jesus neighborhoods, places where the cases were confirmed. Called “chemical control”, the insecticide operation aims to reduce the risk of transmission of disease viruses. It is not an action of “disinsection” of an area.


Of the 45 neighborhoods with MI Aedes surveillance system traps, in epidemiological week 7 (2/12 to 2/19), 25 have a heavy infestation of the Aedes aegypti mosquito, 11 are on alert, seven have a moderate infestation and two , low infestation.

Learn more about vector infestation and the situation of dengue fever and diseases transmitted by Aedes aegypti in Porto Alegre on the website