Topography and Malaria Transmission in Western Kenya
Author Information
Author(s): Githeko Andrew K, Ayisi John M, Odada Peter K, Atieli Francis K, Ndenga Bryson A, Githure John I, Yan Guiyun
Primary Institution: Kenya Medical Research Institute
Hypothesis
The study aims to determine the effects of topography on malaria spatial vector distribution and parasite prevalence.
Conclusion
Malaria transmission is mainly confined to the valley bottom, suggesting that effective vector control could be targeted at specific foci.
Supporting Evidence
- 98% of An. gambiae s.s. were collected at the valley bottom.
- Malaria prevalence was 68% at the valley bottom, 40.2% at mid hill, and 26.7% at the hilltop.
- Children living at the valley bottom had a geometric mean of 66.1 trophozoites for every 200 white blood cells.
Takeaway
Malaria is more common in the valley bottom than on the hills, so focusing on that area could help control the disease better.
Methodology
Indoor resting adult malaria vectors and blood parasites were collected in three villages along a 4 km transect for 13 months.
Potential Biases
Sampling may not represent all areas where children lived, potentially leading to biased prevalence data.
Limitations
The study did not assess other causes of fever, which may affect the interpretation of malaria cases.
Participant Demographics
Children aged 6–13 years old from three villages in Kakamega district.
Statistical Information
P-Value
0.39
Confidence Interval
2.4–12.0
Statistical Significance
p=0.39
Digital Object Identifier (DOI)
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