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What do adult Alaria spp look like?
10 mm, pink or brown with oral and ventral suckers
Have cylindrical hind part
What is a miracidium?
free swimming, ciliated larva which emerges from the trematode egg and swims about in search of the first IH (snail).
What is a Cercariae?
Tadpole like larva that are the final and free swimming larval stages of trematodes.
What is a mesacercariae?
Larval stage of trematodes inside the final IH. AN encysted cercariae waiting for a final host.
What is Life cycle of Alaria spp?
Miracidia emerge from eggs, swim to snail, develop to cercariae in tadpoles, eaten by FH, develops to juvenile in the lungs, tracheal migration to small intestine where it becomes adult. PPP 5 weeks
What pathogenesis might you see with Alaria spp?
Adults may cause duodenitis, lung problems with juveniles
How do you diagnose Alaria spp?
Fecal sedimentation - eggs are too heavy to float (because they are so big!!!)
What are final hosts for Nanophyetus salmincola?
dogs, cats, minks, raccoons, fish eating mammals. This includes humans
What do adult Nanophyetus salmincola look like?
Adults are ovoid and creamy white, 2 mm
Has oral and ventral suckers
How can you distinguish Nanophyetus salmincola from Spirometra?
Nanophyteus common in Pacific NW, Spirometra common in FLorida and subtropical areas.
After Nanophyetus emerges from a snail, what is the second IH?
Salmonids. Eating these raw causes infection of FH.
Why is infestation of Nanophyetus salmincola so dangerous if the adults don't cause much harm themselves?
Carry Neorickettsia helminthoeca which causes severe hemorrhagic enteritis in dogs only. Usually fatal.
How can I recognize Nanophyetus in my dog?
high load may cause diarrhea, hemorrhagic enteritis, lymph node enlargement, sudden fever, vomit, weight loss, fatality
How do I treat Nanophyetus salmincola?
trematocidal medicines and broadspectrum antibiotic to kill rickettsial organisms.
Who are the hosts of Paragonimus kellicotti?
FH - dogs, cats, carnivores, humans
IH - 1. snails 2. crayfish
What does an adult Paragonimus kellicotti look like?
ovoid, 16 mm, reddish brown
Look like coffee beans with a spiny cuticle. Yuck!
Developing flukes cause lung cysts that are dark red-brown/gray, 50mm, in caudal right lung lobe.
What do the eggs of Paragonimus kellicotti look like and how can I find them?
oval, yellowish brown, up to 110um with distance operculum
Where do juvenile Paragonimus kellicotti migrate after ingestion by FH?
Excyst in small intestine, penetrate gut wall, migrate to lungs near a bronchiole.
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