From deadly droughts and destroyed crops to shrinking water sources, communities across sub-Saharan Africa are struggling to withstand the onslaught of global record-breaking temperatures. But the dangers do not end there. Rising heat poses another threat - one that is far less known and studied but could spark disease epidemics across the continent, scientists say.
One of the most common insecticides used in the battle against the Aedes aegypti mosquito has no measurable impact when applied in communities where the mosquito has built up resistance to it, a study led by EmoryUniversity finds.
Malaria mosquitoes prefer to feed - and feed more - on blood from people infected with malaria. Researchers from Stockholm University, the Swedish University of Agricultural Sciences and KTH Royal Institute of Technology have discovered why. The findings can lead to new ways to fight malaria without using poisonous chemicals. The results will be published in the next issue of the journal Science.
Mosquitoes continue to build resistance to existing pesticides. Research has now shown that the chemical substances emitted by one of the mosquito's natural enemies - the backswimmer - makes the biological pesticide Bti more deadly. These so-called predator cues also impair the mosquito's immune system.