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Table 1 Mean survival time for snails exposed to different homologous or heterologous doses of S. mansoni during 25 weeks of follow-up

From: Field-derived Schistosoma mansoni and Biomphalaria pfeifferi in Kenya: a compatible association characterized by lack of strong local adaptation, and presence of some snails able to persistently produce cercariae for over a year

Miracidia1 Mean2 Std. Error 95% CI
Lower Upper
Mwea B. pfeifferi x Mwea S. mansoni     
  1 miracidium 7.66 0.80 6.09 9.23
  5 miracidia 6.18 0.80 4.61 7.75
  10 miracidia 4.04 0.43 3.20 4.88
  25 miracidia 4.14 0.55 3.05 5.23
  Overall 5.51 0.35 4.83 6.18
Mwea B. pfeifferi x Asao S. mansoni     
  1 miracidium 5.10 0.58 3.96 6.24
  5 miracidia 5.34 0.38 4.59 6.09
  10 miracidia 3.94 0.26 3.43 4.45
  25 miracidia 4.40 0.37 3.68 5.12
  Overall 4.70 0.21 4.28 5.11
Asao B. pfeifferi x Mwea S. mansoni     
  1 miracidium 14.42 1.34 11.80 17.04
  5 miracidia 13.52 0.88 11.80 15.24
  10 miracidia 12.44 1.18 10.13 14.75
  25 miracidia 10.30 0.69 8.95 11.65
  Overall 12.68 0.54 11.63 13.73
Asao B. pfeifferi x Asao S. mansoni     
  1 miracidium 12.70 1.35 10.05 15.35
  5 miracidia 14.18 1.26 11.71 16.65
  10 miracidia 9.62 1.25 7.17 12.07
  25 miracidia 10.98 1.49 8.06 13.90
  Overall 12.06 0.70 10.68 13.44
Overall analysis     
  Negative control 18.34 0.86 16.65 20.03
  1 miracidium 9.97 0.60 8.80 11.14
  5 miracidium 9.81 0.53 8.78 10.84
  10 miracidia 7.51 0.52 6.50 8.52
  25 miracidia 7.46 0.50 6.48 8.43
  1. 1No. of snails per miracidia dose was 50; 2Mean snail survival (in weeks).