Climate change will spur a surge in the number of people contracting the deadly tropical disease dengue fever, QUT research has found.
Dr Shahera Banu, and colleagues from QUT's Faculty of Health, investigated the impact of climate change on transmission of the mosquito-borne disease and found there would be "devastating" consequences.
Dr Banu analysed high-risk areas for dengue fever transmission in the Asia-Pacific region, with particular focus on Dhaka, the capital of Bangladesh and a megacity of 11.8 million people.
Using modelling from the Intergovernmental Panel on Climate Change (IPCC) which predicts an annual average temperature rise for the South Asia region of 3.3 degrees by 2100, the research found there would be a swell of dengue cases.
The research has been published in the journals PLOS One and Environment International.
"Without any changes in the socio-economic situation, by the end of this century there will be a projected annual increase of 16,030 cases in Dhaka," Dr Banu said.
"The consequence of this will be devastating."
The warmer temperatures and humidity would provide optimal conditions for mosquitos to thrive, Dr Banu said.
The research collected the monthly number of dengue cases in Dhaka from January 2000 to December 2010 and estimated 377 cases attributable to temperature variation in 2010.
"Assuming a 1 degree temperature increase in 2100, we project an increase of 583 cases, for 2 degrees it would be 2,782 but it is at 3.3 degrees, a rise the IPCC has projected, that will have an overwhelming impact," Dr Banu said.
"Our results show that the monthly temperature and humidity were significantly associated with the monthly dengue incidence in Dhaka.
"These results are consistent with findings of other studies and may assist to forecast dengue outbreaks in different regions."
Dr Banu said places with similar weather conditions to Dhaka would also likely be at risk from a climate change-driven increase in dengue cases.
"We're hopeful this research will be helpful for improving surveillance of dengue fever and control through effective management and community education programs in Bangladesh and other countries in a similar situation," she said.
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