Effectiveness of Insecticide-Treated Nets Against Malaria in Tanzania
Author Information
Author(s): Killeen Gerry F, Kihonda Japhet, Lyimo Edith, Oketch Fred R, Kotas Maya E, Mathenge Evan, Schellenberg Joanna A, Lengeler Christian, Smith Thomas A, Drakeley Chris J
Primary Institution: Ifakara Health Research and Development Centre
Hypothesis
Does increased coverage of insecticide-treated nets (ITNs) affect mosquito biting behavior and malaria transmission?
Conclusion
ITNs remain highly effective in providing protection against malaria transmission despite potential changes in mosquito behavior.
Supporting Evidence
- ITNs provide over 70% protection against malaria transmission for users compared to non-users.
- Approximately 90% of mosquito bites occur indoors and during peak sleeping hours.
- High levels of ITN coverage have not significantly reduced malaria transmission intensity for non-users.
Takeaway
Using special nets while sleeping helps keep mosquitoes away and reduces the chance of getting malaria, even if some mosquitoes change their habits.
Methodology
Surveys of mosquito biting activity were conducted before and after ITN promotion, combined with human behavioral questionnaires.
Potential Biases
Potential bias due to reliance on self-reported data from human behavioral surveys.
Limitations
The study did not sample mosquitoes during early morning hours when biting activity may peak.
Participant Demographics
Participants were from rural villages in the Kilombero Valley, Tanzania.
Statistical Information
P-Value
0.0001
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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