Table 1.
Snail survival on day 30 post-exposure, prevalence of Calicophoron daubneyi infection, and numbers of free rediae and free cercariae in 12 groups of Pseudosuccinea columella subjected to individual quinque-miracidial exposures and dissected on day 42. Fifty snails of each group were exposed on day 1, except for 100 snails in each 1-mm and 100 in each 2-mm group.
| Snail population and group | Number of surviving snails (%) | Number of infected snails (prevalence %) | Number of larval forms: mean ± SD
|
|
|---|---|---|---|---|
| Free rediae | Free cercariae | |||
| Egypt (mm) | ||||
| 1 | 42 (42.0) | 9 (21.4) | 2.7 ± 1.1 | 5.3 ± 2.5 |
| 2 | 85 (85.0) | 3 (3.5) | 3.3 ± 1.4 | 8.4 ± 4.1 |
| 3 | 47 (94.0) | 0 (–) | – | – |
| 4 | 49 (98.0) | 0 (–) | – | – |
| 5 | 48 (96.0) | 0 (–) | – | – |
| 6 | 49 (98.0) | 0 (–) | – | – |
| France (mm) | ||||
| 1 | 37 (37.0) | 6 (16.2) | 3.4 ± 1.7 | 4.7 ± 3.5 |
| 2 | 79 (79.0) | 1 (1.2) | 4 | 7 |
| 3 | 45 (90.0) | 0 (–) | – | – |
| 4 | 47 (94.0) | 0 (–) | – | – |
| 5 | 47 (94.0) | 0 (–) | – | – |
| 6 | 49 (98.0) | 0 (–) | – | – |
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