A worrying report from news agency AFP says that delegates at a conference in Abuja, Nigeria have expressed that mosquitoes are becoming less sensitive to insecticides. According to Peter Clearyof Vestergaard Frandsen, manufacturers of insecticide-impregnated bednets, “There is concern that the malarial vectors are becoming resistant to the entire class of insecticides the WHO approves”.
Amongst others interviewed by AFP was Yayo Abdulsalam, a researcher and lecturer in medical entomology. He points out that, “In cases where there is high resistance of mosquitoes to insecticides, there is high usage of agricultural pesticides”.
Resistance is the “first warning sign that you have to take necessary measures to ensure that the few insecticides we have… will be effective,” says Sam Awolola, a scientist with Nigerian Institute of Medical Research.
The impact of climate change on malarial mosquitoes was also discussed at the conference.