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Table 3 S. mansoni intensity of infection at sentinel sites in 2009 and 2012 in Sierra Leone

From: Schistosoma mansoni infection after three years of mass drug administration in Sierra Leone

  2009 2012 Change (%)
Number examined Mean intensity of infection (epg) (95% CI) Number examined Mean intensity of infection (epg) (95% CI)
Overall 770 134.53 (93.51 - 175.55) 1290 18.98 (11.46 - 26.50) −85.9
By district      
  Bo 119 35.09 (17.59 - 52.59) 198 0.12 (0–0.36) −99.7
  Bombali 142 48.85 (27.67 - 70.02) 239 18.68 (5.95 - 31.41) −61.8
  Kailahun 90 194.93 (116.14 - 273.73) 149 19.33 (8.62 - 30.03) −90.1
  Kenema 119 191.60 (132.61 - 250.58) 199 25.69 (11.99 - 39.39) −86.6
  Koinadugu 60 250.80 (180.44 - 321.16) 100 42.72 (24.86 - 60.58) −83.0
  Kono 60 159.60 (87.16 - 232.04) 101 10.22 (5.66 - 14.78) −93.6
  Tonkolili 180 91.33 (57.43 - 125.24) 304 24.87 (14.94 - 34.80) −72.8
By baseline endemicity     
  Low 118 9.25 (0–18.56) 201 15.50 (0–34.84)* 67.6
  Moderate 294 29.81 (19.14 - 40.48) 498 8.78 (2.79 - 14.76) −70.5
  High 358 226.01 (153.79 - 298.23) 591 26.41 (13.18 - 39.64) −88.3
By sex      
  Boys 373 133.96 (80.79 - 187.13) 645 19.30 (9.30 - 29.30) −85.6
  Girls 396 135.00 (72.98 - 197.02) 644 18.69 (7.45 - 29.94) −86.2
  1. *Change in intensity of infection in this group is not statistically significant (p = 0.26).