Background The use of long-lasting insecticidal nets (LLINs) for malaria prevention is a cost-effective intervention. WHO recommends universal coverage and use of LLINs. In lower- and middle-income countries, LLINs are provided free of charge but are either not used or misused. Our study sought to improve LLIN use in Kayange community of north-western Burundi by using a model for improvement (MFI).

Methods A one-group, pre/post-test study was conducted. LLIN weekly use was assessed for four weeks before intervention and for another four weeks after intervention. The study was conducted in 96 households. The intervention consisted of testing four different weekly small change actions by using the MFI.

Results Of the 96 households, 83 households (87%) owned at least one LLIN. However, only 40 households (42%) owned at least one LLIN for every two people. After intervention, the number of LLINs used increased from 32 to 75 per cent (134% increase) and the number of persons (general population) sleeping under LLIN from 35 to 73 per cent (108% increase). The number of children under 5 years old sleeping under LLIN increased from 31 to 76 per cent (145% increase) and the number of pregnant women who slept under LLIN from 43 to 73 per cent (69% increase). Also, the averages of the number of nights in each week that the general population slept under LLIN increased from 2.13 to 5.11 (140% increase), children under 5 years old slept under LLIN from 1.68 to 4.78 (184% increase) and pregnant women slept under LLIN from 1.56 to 4.47 (186% increase).

Conclusion Our intervention led to significant increase in all outcome indicators. This increase is the result of a combination of an enabling context and an effective implementation of an evidence-based quality improvement intervention. Small tests of change at the community level have the potential for achieving improved outcomes.