Volume 93, Issue 6
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645



World Health Organization recommendations for the timing and target population for mass drug administration (MDA) for schistosomiasis are based on the prevalence of infection in school children within a given community. In a large study comparing MDA approaches for control, we evaluated whether prevalence of infection and egg burdens in 9- to 12-year-old students reflected infection levels in young children and adults in the same community. Cross-sectional surveys of preadolescents (9–12 years old) were compared with those of first year students (5–8 years old) in 225 villages and adults (20–55 years old) in 150 villages along the Kenyan shores of Lake Victoria. Village schistosomiasis prevalence and intensity levels in preadolescents strongly correlated ( < 0.0001) with prevalence and infection intensity for other age groups in the community. Our findings suggest that prevalence and intensity among 9- to 12-year-olds are valid for community sampling purposes in mapping for MDAs.


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  • Received : 25 Jun 2015
  • Accepted : 20 Aug 2015
  • Published online : 09 Dec 2015

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