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The Human Risk
Parasites are unpleasant and can, in some cases, transmit fatal diseases to dogs and cats. However, one of the most worrying human risks comes from the roundworm 'Toxocara' . In rare cases, if ingested by a human this parasite can move to the back of the eye and cause blindness!
Due to the serious nature of this parasite a regular preventative treatment should be considered if you frequently see slugs or snails in your locality. Slugs and snails are on the increase and dogs can swallow these accidentally. Standard wormers do not prevent this parasite; so speak to your vet for more advice.