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Table 1 Prevalence (± 95% confidence interval, CI) and mean arithmetic infection intensity (± 95% CI) of Schistosoma mansoni at two schools in Lake Victoria region of Tanzania in April 2005, April 2006 and July 2010

From: Phenotypic and genotypic monitoring of Schistosoma mansoni in Tanzanian schoolchildren five years into a preventative chemotherapy national control programme

School Year Prevalence (%) (95% CI) Mean infection intensity (epg) (95% CI) No. of children surveyed (n)
Bukindo 2005 60.3 (56.6–64.1) 134.5 (114.2–154.5) 174
Bukindo 2006 77.0 (73.4–80.3) 65.5 (49.9–81.1) 160
Bukindo 2010 95.5 (88.6–98.0) 116.2 (81.2–151.2) 66
Kisorya 2005 90.4 (88.4–92.3) 421.9 (349.8–494.0) 228
Kisorya 2006 93.0 (91.2–94.8) 427.4 (352.0–502.8) 205
Kisorya 2010 92.7 (88.6–96.7) 444.4 (284.6–604.2) 41
  1. Bukindo School received treatment in November 2005, 2007, 2008 and 2009 and Kisorya School received treatment in November 2005 and 2007 only