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Impact of Indoor Residual Spraying of Lambdacyhalothrin on Malaria Prevalence and Anemia in an Epidemic-Prone District of Muleba, North-Western Tanzania

 

From: The American Journal of Tropical Medicine and Hygiene
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The Government of Tanzania introduced indoor residual spraying (IRS) in Muleba district in north-western Tanzania after frequent malaria epidemics. Malaria parasitological baseline and two cross-sectional follow-up surveys were conducted in villages under the IRS program and those not under IRS to assess the impact of IRS intervention. After two rounds of IRS intervention there was a significant reduction of malaria parasitological indices in both two villages. In IRS villages overall, parasitemia prevalence was reduced by 67.2%, splenomegaly was reduced by 75.8%, whereas anemia was reduced by 50.5%. There was also a decline of malaria parasite density from 896.4 at baseline to 128.8 at second follow-up survey. Similarly, there was also a reduction of malaria parasitological indices in non-IRS villages; however, parasitological indices in IRS villages remained far below the levels in non-IRS villages. The reduction of malaria parasitological indices in non-IRS villages might have been contributed to interventions other than IRS.

Authors:

  1. Fabian M. Mashauri,
  2. Safari M. Kinung'hi,
  3. Godfrey M. Kaatano,
  4. Stephen M. Magesa,
  5. Coleman Kishamawe,
  6. Joseph R. Mwanga,
  7. Soori E. Nnko,
  8. Robert C. Malima,
  9. Chacha N. Mero and
  10. Leonard E. G. Mboera