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Background: Though several studies have been conducted on insecticide-treated nets (ITNs) and long-lasting insecticide nets (LLINs) use in sub-Saharan Africa, the actual consistent use of mosquito nets is hardly studied. Most studies on mosquito net use also have been cross sectional surveys. The aim of this study was to measure changes of the number of LLIN consistent user individuals and its predictors among household members of Kersa. Methods & Materials: A longitudinal study was conducted among the household members in Kersa Demographic Surveillance and Health Research Center (KDS-HRC) from November 15 to December 30, 2010.Acohort of 1030 LLINsownedhouseholds, with their household members, were randomly selected and involved in the study. The data were collected in four waves every other week via interviews and observations.AGeneralized Estimating Equation (GEE) was used for data analysis. Results: Consistent use of LLIN declined towards the end of the malaria season. Early in the season 2236(41.6%) individuals were consistent users and at the end of the season it declined to 10.2%. The presence of LLINs on hanged position (Adjusted IRR = 3.41, SE = 0.181, P<0.0001), availability of an adequate number of LLINs (Adjusted IRR = 1.25, SE = 0.052, P<0.0001), and the presence of children under five years age (Adjusted IRR = 1.24, SE = 0.078, P<0.0001) were more likely to use LLINs consistently than their counterparts. Conclusion: Residents in malaria endemic areas tend to be less protected at the end of malaria transmission season. Individuals tend to use bed net if it is kept in a ready to use position in the household. [ABSTRACT FROM AUTHOR]