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Table 3.
Production costs for 100 metacercariae in Galba truncatula and Pseudosuccinea columella infected with Fasciola hepatica (five miracidia per snail at exposure).
| Parameters | P. columella | G. truncatula (controls) |
|---|---|---|
| Time (hrs) spent by a technician | ||
| Exposure of snails to miracidia and preparation of Petri dishes | 4.0 | 4.0 |
| Surveillance of breeding recipients for snails | 9.5 | 15.5 |
| Count of metacercariae every three days during the patent period | 28.5 | 21.0 |
| Transfer of metacercariae to Eppendorf tubes by aspiration | 0.33 | 0.33 |
| Total | 42.33 | 40.83 |
| Cost of time (Euros) spent by a technician* | 969.3 | 935.0 |
| Purchase price of materials used for 100 snails (Euros) | ||
| Consumables | 7.51 | 7.51 |
| Lettuce | 4.12 | 2.88 |
| Total cost for 100 snails (Euros) | 980.9 | 945.3 |
| Number of snails at miracidial exposure | 200 | 200 |
| Number of metacercariae encysted on dish walls and bottom | 25,856: Beni Suef | 12,136: Migné, |
| 18,065: Castelmoron | 8,687: Thenay | |
| Cost price for 100 metacercariae in Euros (US dollars) per snail exposed to miracidia** | 3.79 (4.16): Beni Suef | 7.78 (8.55): Migné |
| 5.42 (5.96): Castelmoron | 10.88 (11.96): Thenay | |
| 4.60 (5.06): Both | 9.33 (10.26): Both |
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