Cestodes, Trematodes, Acanthocephalans Flashcards
(47 cards)
phylum platyhelminthes includes 2 classes
trematodes and cestodes
what are trematodes and cestodes
flatworms that lack body cavity
cestodes have 2 subclasses
eucestoda (true tapeworms) and cotyloda (pseudotapeworms)
life cycle of platyhelminthes
always indirect and need 1 or 2 intermediate hosts (arthropods, fish, mammals)
larval stages of some tapeworms are found in domestic animals and look like fluid filled sacs with one or more scoleces
bladder worms
what are scoleces
heads
eucestodes are…
multicellular but lack body cavity
where are eucestodes organs
embedded in parenchyma
body parts of eucestodes
scolex (head) with 2-4 suckers and may have snout with hooks, neck, stroblia (body) immature, mature, and gravid proglottids
process of gravid proglottids
break off stroblia and pass through host feces and new proglottids are formed from the neck
most common tapeworm found in sm. intestines of dogs and cats
Dipylidium caninum
prepatent period for D. caninum
14-21 days
what are found in the feces, fur, and bedding of dogs with D. caninum
gravid proglottids
what is required for an animal to get tapeworms?
fleas
dogs become infested with this sp. of tapeworms from ingesting rabbits or hares
Taenia pisiformis
dogs become infested with with this sp. of tapeworms from ingesting ruminants
Taenia hydatigena and T. ovis
feline tapeworms
T. taeniaeformis and Hydatigera taeniaeformis
tapeworms associated with unilocular and multilocular hydatid disease
Echinococcus granulosus and E. multilocularis
parts of tiny tapeworms
3 proglottids: one immature, one mature, one gravid
human bladder worm that is associated with “beef measles”
Taenia saginata
human bladder worm associated with “pork measles”
Taenia solium
parasites of sm intestines of rodents but occasionally dogs and humans
Vampirolepis nana and Hymenolepis diminuta
Spirometra sp. peudotapeworms common name
zipperworms
where are zipperworms found
jejunum of dogs and cats in florida and along gulf
