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Table 4 Description of sub-optimal collection conditions

From: Testing a method of sampling for entomological determination of transmission of Wuchereria bancrofti to inform lymphatic filariasis treatment strategy in urban settings

Trap typesMalfunctionParticipant actionWeather
GravidIssues with the batteries where they ran out of power or were old, meaning the fan was running slowly or intermittently or not running by the time the team arrivedTraps were damaged by animals (goats, sheep) present on people’s properties, usually resulting to trap malfunction due to fan stopping because of disconnection or collapse of the whole trap structureStrong winds and rains caused water to fill the basins. These caused fans to stop running and prevented entry of more mosquitoes into the trap as well as damaged attractant in the traps
Disconnected battery
Fan running in the opposite direction pushing mosquitoes downward. This indicates that the traps were assembled incorrectly
ExitSpiders inside the trap could have eaten mosquitoesNobody slept in the room (usually due to heat) meaning mosquitoes would have been less likely to enter the roomStrong winds detached some traps from the window
People slept under bednets preventing mosquito bites
PSC Nobody slept in the room meaning mosquitoes would have been less likely to enter the room and/or resting there 
People slept under bednets meaning mosquitoes potentially would fail to bite and/or go to rest
Use of coil/insecticides reduced the number of mosquitoes in and around the house
Some doors/windows were opened on arrival. As a result, mosquitoes would have been able to escape