Entomological surveys directly study a sampling of mosquitoes in order to provide an understanding of any changes in the characteristics and behaviour of malaria vectors, especially in relation to importance of different vector species in malaria transmission, feeding habits and resistance to insecticides.
How were the entomological surveys conducted?
We used different trapping methods in selected households in each study site to collect and study mosquitoes:
What data was collected during the entomological survey?
Why is the entomological survey data important?
The effectiveness of malaria interventions relies on an accurate understanding of the characteristics and behaviour of mosquitoes. Entomological surveys are crucial in determining feeding habits and density of different malaria vector species, their age and infection rates, as well as to characterise resistance to currently available insecticides in the study populations. Any changes need to be identified quickly, so that interventions can be adapted accordingly.
See the figure below for examples of five trapping methods that were used:
From left to right: LTC to collect host-seeking mosquitoes indoors; ETC to collect mosquitoes leaving the house after (un)successful attempt to feed; indoor RMS to collect mosquitoes resting indoors; PSC to collect mosquitoes resting indoors using an insecticide and white sheets spread over the floor surface; HLC to collect host-seeking mosquitoes throughout the night indoors (18:00-06:00) and outdoors (18:00-00:00).