Veterinary Parasitology: Trematodes

Front 1

Name the species:
Blood flukes.
Found in the tropics.
Causes schistosomiasis in humans.
Sexes are separate.
No metacercariae stage: on release, the cercariae swim in water and actively seek their final host.

Back 1

Schistosomidae

Front 2

Name the species:
Small fluke found in the bile ducts of ruminants and other herbivores.
2 intermediate hosts: land snails and wood ants.

Back 2

Dicrocoelidae
ex. Dicrocoelium dendtriticum

Front 3

Name the species:
Severe losses in ruminants in the wet tropics.
Plump, cylindrical adult attaches to wall of rumen without causing serious damage.
Eggs similar to Fasciola.
Intermediate host: water snails
Disease occurs when metacercariae are eaten in large numbers.
Enteritis and diarrhea result when immature flukes migrate along the small intestine toward rumen.

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Paramphistomidae
ex. Paramphistomum spp.

Front 4

Name the species:
Parasitize small intestine of piscivorous carnivores of the Northwest.
Hosts become infected by eating infected salmon.
Hosts can be dogs, cats, coyotes, foxes, bears, raccoons, or minxes.
Host to rickettsial agent Neorickettsia helminthoeca which causes salmon poisoning.
Does not seriously affect humans

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Troglotrematidae
ex. Nanophyetus salmoncola