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Table 1 Several characteristics of Fasciola hepatica infection in four generations of Lymnaea fuscus and Radix balthica subjected to individual bimiracidial exposures, raised at 20°C and dissected at day 50 post-exposure (first experiment)

From: Adaptation of Lymnaea fuscus and Radix balthica to Fasciola hepatica through the experimental infection of several successive snail generations

Snail population and generation Number of surviving snails at day 30 p.e. (%) Number of infected snails with Overall prevalence of infection (%)
Immature rediae Cercariae-containing rediae Free cercariae Cercarial shedding
Lymnaea fuscus      
- F1 16 (32.0) - - - - -
- F2 24 (48.0) 1 - - - 4.1
- F3 27 (54.0) 2 2 1 - 18.5
- F4 29 (58.0) 2 4 3 1 34.4
Radix balthica      
- F1 26 (42.0) 2 1 - - 11.52
- F2 27 (54.0) 2 3 1 - 22.2
- F3 33 (66.0) 1 5 2 1 27.2
- F4 31 (62.0) 2 3 7 3 48.3
  1. p.e., post-exposure.