Increase in Temperature Associated With Decrease in Incubation Period

Johns Hopkins Malaria Minute

Researchers compare the temperature of mosquito breeding spots with a decade early to examine its impact on malaria transmission.

Transcript

The effects of climate change on malaria are becoming clearer. Anopheles stephensi – an urban form of the malaria mosquito – is changing its geography, moving from Southeast Asia to parts of Africa and India. To investigate the link between temperature and malaria, between 2021 and 2022 researchers in Chennai, India placed data loggers that recorded temperature – and the daily range of temperature - in both indoor and outdoor settings. They took those measurements and compared them to ten years earlier, from 2012 to 2013. The daily temperature range of indoor asbestos structures increased from 4.3 to 12.6 degrees Celsius — compared to a marginal increase in other structures. Importantly, an increase in temperature was associated with a decrease in the incubation period – that's the time it takes for the parasite to develop in the mosquito. With invasive mosquito species entering new areas, combined with the shorter time it takes to transmit, it's becoming more clear that rising temperatures will lead to an increase in malaria cases in certain areas – and that preparation will be key.

Source

Impact of climate change on temperature variations and extrinsic incubation period of malaria parasites in Chennai, India: implications for its disease transmission potential

About The Podcast

The Johns Hopkins Malaria Minute podcast is produced by the Johns Hopkins Malaria Research Institute to highlight impactful malaria research and to share it with the global community.