Informing new or improved vector control tools for reducing the malaria burden in Tanzania : a qualitative exploration of perceptions of mosquitoes and methods for their control among the residents of Dar es Salaam

Background The effectiveness of malaria prevention with long-lasting insecticidal nets and indoor residual spraying is limited by emerging insecticide resistance, evasive mosquito behaviours that include outdoor biting, sub-optimal implementation and inappropriate use. New vector control interventions are required and their potential effectiveness will be enhanced if existing household perceptions and practices are integrated into intervention design.