Dengue presupposes concerns about mosquito adaptation to cold – Rio Grande do Sul

A study from the University of Florida in the USA shows that mosquitoes can adapt to rapid temperature changes. U.S. research suggests that species that are normally dormant in winter, such as Aedes aegypti, which transmits dengue, are becoming more active due to climate change.

Climate and environmental changes are contributing to the spread of mosquitoes
Photo: Diego da Rosa / GES

According to the study, the change is happening mainly because the cold periods are shorter and less intense in different areas of the planet, as has happened in southern South America, for example.

The biomedical researcher and professor at Ulbra, Allyne Cristina Grando, says the increase in dengue messages in the region is a reflection of the Aedes mutation, in addition to climatic and environmental conditions. The teacher remembers that for some years the southern region of Brazil has felt the difference in winter. “It’s cold periods, but with a greater incidence of warmer days, it’s not a constant and long cold. And it also favors mosquito reproduction and greater activity,” he elaborates.


The number of hospitalizations in Rio Grande do Sul due to dengue has dropped in the last week. According to surveillance data from the State Department of Health, 41 people were admitted this Friday due to the disease, of which 34 were in clinical beds and seven in the intensive care unit.

The highest number of admissions recorded in recent days was May 24, when 136 patients were registered in RS.

So far, there have been 45 deaths due to dengue. The cities with the highest number of deaths are Igrejinha (with 6), Porto Alegre and Horizontina (with 4 each), Novo Hamburgo, Lajeado, Rondinha and Jaboticaba (with 3 each).

This year, the state is already registering the registration of reports and deaths from dengue. There are more than 32,880 confirmed cases, more than tripling compared to 2021 figures.

Deaths: dead

Last year, there were 10,588 cases and 11 deaths from the disease. Since the beginning of the history series, in 2000, Rio Grande do Sul had not registered as many cases of dengue.

Dengue cases in the region

small church – 2,532 confirmed cases, no hospitalization and 6 deaths
Porto Alegre – 2,485 confirmed, 3 admissions, 4 deaths
Sao Leopoldo – 1,593 confirmed cases, 1 hospitalization, 1 death
Estancia Velha – 883 confirmed cases, 2 admissions, 1 death
New Hamburg – 648 confirmed cases, 6 admissions, 3 deaths
Sapiranga – 491 confirmed cases, 1 hospitalization, no deaths
Montenegro – 219 confirmed, 2 admissions, no deaths
Sapucaia do Sul – 159 confirmed, 1 hospitalization, 1 death
canoes – 122 confirmed cases, 1 hospitalization, no deaths
The carrying stone 44 confirmed cases without hospitalizations or deaths
Lawn 44 confirmed cases without hospitalizations or deaths
Gravataí – 21 confirmed, no hospitalizations or deaths
The Santa Rita – 3 confirmed, no hospitalizations or deaths
small waterfall – 5 confirmed cases, no hospitalizations or deaths

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