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The Effect of Indoor Residual Spraying on the Prevalence of Malaria Parasite Infection, Clinical Malaria and Anemia in an Area of Perennial Transmission and Moderate Coverage of Insecticide Treated Nets in Western Kenya

Author

Listed:
  • John E Gimnig
  • Peter Otieno
  • Vincent Were
  • Doris Marwanga
  • Daisy Abong’o
  • Ryan Wiegand
  • John Williamson
  • Adam Wolkon
  • Ying Zhou
  • M Nabie Bayoh
  • Neil F Lobo
  • Kayla Laserson
  • Simon Kariuki
  • Mary J Hamel

Abstract

Background: Insecticide treated nets (ITNs) and indoor residual spraying (IRS) have been scaled up for malaria prevention in sub-Saharan Africa. However, there are few studies on the benefit of implementing IRS in areas with moderate to high coverage of ITNs. We evaluated the impact of an IRS program on malaria related outcomes in western Kenya, an area of intense perennial malaria transmission and moderate ITN coverage (55–65% use of any net the previous night). Methods: The Kenya Division of Malaria Control, with support from the US President’s Malaria Initiative, conducted IRS in one lowland endemic district with moderate coverage of ITNs. Surveys were conducted in the IRS district and a neighboring district before IRS, after one round of IRS in July-Sept 2008 and after a second round of IRS in April-May 2009. IRS was conducted with pyrethroid insecticides. At each survey, 30 clusters were selected for sampling and within each cluster, 12 compounds were randomly selected. The primary outcomes measured in all residents of selected compounds included malaria parasitemia, clinical malaria (P. falciparum infection plus history of fever) and anemia (Hb

Suggested Citation

  • John E Gimnig & Peter Otieno & Vincent Were & Doris Marwanga & Daisy Abong’o & Ryan Wiegand & John Williamson & Adam Wolkon & Ying Zhou & M Nabie Bayoh & Neil F Lobo & Kayla Laserson & Simon Kariuki &, 2016. "The Effect of Indoor Residual Spraying on the Prevalence of Malaria Parasite Infection, Clinical Malaria and Anemia in an Area of Perennial Transmission and Moderate Coverage of Insecticide Treated Ne," PLOS ONE, Public Library of Science, vol. 11(1), pages 1-29, January.
    • Handle: RePEc:plo:pone00:0145282
    DOI: 10.1371/journal.pone.0145282
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