Malaria risk is spreading to new parts of Africa - TechCentral

The report, published this week in the peer-reviewed journal Biology Letters, found that mosquitoes have moved to higher elevations and have pushed further south. The movements align with observed climate changes and could explain malaria transmission patterns during the studied time frame, according to the team of researchers led out of Georgetown University in the US.

Researchers have long forecast that climate change will dramatically alter the geographical spread of the world’s living species, including dangerous pathogens and carriers of disease. Even so, scientists have lamented the dearth of knowledge regarding the exact impact of warming temperatures on the spread of diseases like malaria.The new Georgetown study adds to evidence that global warming has affected mosquito populations to a greater degree than previously realised.

“We have to stop thinking about climate change impacts as a future problem,” said Colin Carlson, the study’s lead author and an assistant research professor at Georgetown’s Center for Global Health Science and Security. “We’re decades into experiencing this, and we should be studying it like that’s the case.”

According to Carlson, a few studies observing the locations of mosquitoes have used modern data to extrapolate the species’ movement. The Georgetown study, however, analysed existing historical records showing the locations of 22 species of mosquitoes from 1898 to 2016. Researchers found that each year, the species’ ranges pushed 4.7km south and gained 6.5m of elevation.

“It’s possible that in the next few years, we might start to see malaria in places that we don’t typically think of as high risk,” Carlson said. —

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