Open Access
Table II.
Main parameters of F. hepatica infection in riverbank G. truncatula after their collection in April 2010.
| Snail groups from |
||||||
|---|---|---|---|---|---|---|
| Parameter | Thenay (riverbank group) |
Ruffec/Saint-Gaultier (islet group) |
Statistics | |||
| Number of snails at exposure | 326 | 403 | – | |||
| Number of surviving snails just after their recapture in April (%) | 101 (30.9) | 115 (28.5) | NS | |||
| Number of CS snails | 29 | 11 | – | |||
| Number of NCS snails | 15 | 40 | – | |||
| Prevalence of F. hepatica infection (%) | 43.5 | 44.3 | NS | |||
| Mean height (SD) of infected snails at their death (mm) | 5.9 (0.7) | 5.7 (0.9) | NS | |||
| Mean length (SD) of the patent period (days) | 14.3 (7.1) | 10.2 (6.2) | NS | |||
| Mean numbers (SD): | ||||||
| • Free rediae | 21.4 (5.7) | 12.8 (5.6) | F = 53.69, P < 0.001 | |||
| • Free rediae containing cercariae | 13.8 (3.6) | 5.9 (3.4) | F = 119.84, P < 0.001 | |||
| • Intraredial cercariae | 31.2 (13.2) | 12.1 (4.5) | F = 3.93, P < 0.05 | |||
| • Free cercariae within the snail’s body | 46.5 (28.9) | 9.9 (9.8) | F = 71.98, P < 0.001 | |||
| • Metacercariae | 71.0 (38.5) | 22.8 (15.6) | F = 15.99, P < 0.01 | |||
| Mean total cercarial production | 148.7 | 44.8 | – | |||
CS snails, cercariae-shedding snails; NCS snails, snails infected but without cercarial shedding; NS, not significant.
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