Open Access
Table 1.
Snail survival on day 30 post-exposure, prevalence of Fasciola hepatica infection, shell height of cercariae-shedding (CS) snails at their death, lengths of prepatent and patent periods, and number of metacercariae in four groups of pre-adults subjected to individual bimiracidial exposures and raised at 23 °C.
| Snail species |
Pseudosuccinea columella
|
Galba truncatula (controls) |
||||
|---|---|---|---|---|---|---|
| Population | Beni Suef | Castelmoron | Total | Migné | Thenay | Total |
| Number of snails | ||||||
| At exposure | 100 | 100 | 200 | 100 | 100 | 200 |
| Day 30 (%) | 94 (94.0) | 87 (87.0) | 181 (85.5) | 65 (65.0) | 74 (74.0) | 139 (69.5) |
| Number of CS snails | 36 | 29 | 65 | 40 | 51 | 91 |
| Prevalence (%) | 38.2 | 33.3 | 35.9 | 61.5 | 68.9 | 65.4 |
| Shell height of CS snails (mm)* | 10.2 ± 1.7 | 11.2 ± 1.4 | 10.6 ± 1.6 | 6.3 ± 1.0 | 6.5 ± 0.9 | 6.4 ± 0.9 |
| Lengths (days)* | 52.5 ± 8.8 | 49.8 ± 6.1 | 51.3 ± 7.6 | 42.1 ± 3.7 | 39.5 ± 4.5 | 40.6 ± 4.2 |
| Prepatent period | ||||||
| Patent period | 31.6 ± 12.4 | 27.3 ± 8.6 | 29.6 ± 10.7 | 21.3 ± 5.8 | 25.7 ± 8.2 | 23.7 ± 7.2 |
| Metacercariae* | ||||||
| Total | 14,087 | 10,069 | 24,156 | 6556 | 9554 | 16,110 |
| Per CS snail | 391.3 ± 125.2 | 347.2 ± 84.8 | 371.6 ± 107.1 | 163.9 ± 74.3 | 187.3 ± 80.4 | 177.0 ± 77.4 |
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