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Table 3 Infection characteristics of Lymnaea fuscus, Lymnaea palustris and Galba truncatula

From: Lymnaea palustris and Lymnaea fuscus are potential but uncommon intermediate hosts of Fasciola hepatica in Sweden

  Snail species
Infection characteristic Lymnaea fuscus Lymnaea palustris Galba truncatula
Shell size at day of exposure (mm) 1-2 1-2 1-2 ≥ 2-4
Prevalence of F. hepatica infection (%) 13.0 51.3 89.5 91.9
Number of infected snails (CS + NCS) 9 40 51 68
Number of snails with cercarial shedding (CS)/snails without cercarial shedding (NCS) 1/8 17/23 34/17 59/9
First observed cercarial shedding (day post exposure) 68 61 46 43
Mean number of spontaneously shed cercariae per CS snail ± S.D. 18a 18 ± 23a 103 ± 80b 130 ± 102b
Total number of metacercariae in all CS snails 18 348 3619 7952
Mean number of MC per NCS snail (± S.D.) at dissection (after crushing) 157 ± 58a 165 ± 51a 269 ± 114b 299 ± 88b
  1. Superscript letters (a, b) indicate significant differences (p < 0.05) in metacercarial/cercarial production between groups.
  2. CS, cercariae shedding snails (spontaneous shedding of cercariae during experiment).
  3. NCS, non cercariae shedding snails (snails that did not produce cercariae spontaneously but contained F. hepatica larvae).