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life stages of trematodes (you don't need to memorize the life cycles of all the critters in this chapter!!!)
eggs in water--> Miracidium--> gets into intermediate host--> Sporocyst forms in intermediate host--> Rediae --> Cercariae --> Metacercaria --> adult
Schistosoma spp.
Schistosomiasis
name
host
intermediate host
most miserable condition second to malaria. Causes liver damage thats permanent.
"snail fever"
snail
Fasciolidae
name-
intermediate host
Fasciola hepatica- known as "liver rot
host: herbivores that eat aquatic plants
int: snail
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Huge liver fluke originally in North America (deer, elk, bison, otherruminants) but now is established in Europe. Lives in liver parenchymainstead of bile ducts. Can do extensive damage due to large size. Often theybecome encased in a calcareous cyst of host origin, which reduces the effecton the host.
Fascioloides magna
Ribeiroia ondatrae
name
host
intermediate host
second intermediate host
bird that eats frog
snail
frog
Dicrocoelium dendriticum
name
Host
first int host
second int host
Herbivore
first intermed host snail
second is ants
Chlonorchis sinensis (Chinese Liver Fluke)
name
host
intermed host
eggs in water, snails eat eggs. Secondary host is fish. People eat fish that aren't cooked and get sick.
Cestoidea: TapewormsThere are three main regions of an adult tapeworm:
-Scolex :(a)
-Neck :(b)
-Strobila : (c)
(a) head that contains holdfast organs for attachment to the host
(b) stem cells for new proglottid production
(c) maturing proglottids
Diphyllobothrium spp
name
host
intermed host
broad fish tapeworm
mammals and people
first intermed host- copopod
second intermed host- fish
Taenia saginata
name
host
intermed host
beef tapeworm
humans
cows
Taenia solium
name
host
intermed host
why is this the most dangerous tapeworm of humans/
pork tapeworm
humans
pork or humans
more dangerous because people can also ingest the eggs and become the intermediate hosts. People can get larval tapeworms in tissues from ingesting eggs
DIplylidium caninum
name
host
intermed host
dog or cat or even children
intermed host is flea (when ingested)
Moniezia
name
host
int host
goats and sheep
herbiage mites/grain mites
