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CLINICAL PARASITOLOGY
cestodes
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Coleen Huerto
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Flatworms aka Large tapeworms
Cestodes
what is the shape of cestodes in small intestine?
Flat
and
ribbon-like
it is when both male and female reproductive organs are present in the mature proglottid
hermaphroditic
average life span of a cestode
20
years
what are the developmental stages
egg-larva-adult
what does the larvae inhabit?
tissues
in
the
small intestine
what does the adult tapeworm inhabit?
intestinal tract
the body is covered with what?
resistant cuticle
it has scolex and bothria
pseudophyllidean
proglottids are anapolytic
pseudophyllidean
it produces operculated and immature eggs
pseudophyllidean
its embryo is coracidium
pseudophyllidean
it has scolex with 4 suckers
cyclophyllidean
proglottids are apolytic
cyclophyllidea
it produces non-operculated and mature eggs
cyclophyllidean
its embryo is called hexacanth
cyclophyllidean
it has branching uterine branches
cyclophyllidean
utetine branches are absent
pseudophyllidean
uterine pore is present
pseudophyllidean
uterine pore is absent
cyclophyllidean
genital pore is ventral
pseudophyllidean
genital pore is lateral
cyclophyllidean
what are the pseudophyllidean species?
Diphyllobothrium
latum
What are the cyclophyllidean species?
Hymenolepsis
spp.
,
Taenia
spp.
,
Dipylidium caninum
consists of a hexacanth embryo also known as an
oncosphere
eggs
it is oval appearance and seen inhuman cestode
operculated egg
what spp. has operculated egg
Diphyllobothrium latum
it has circle appearance and a presence of hexacanth embryo
non-operculated
egg
larval stage of taenia solium
Cysticercus
cellulosae
larval stage of taenia saginata
Cysticercus bovis
larval stage of hymenolepsis spp.
cysticercoid
larval stage of dipylidium caninum
cysticercoid
larval stage of echinococcus granulosus
hydatid cyst
larval stage of diphyllobothrium latum
first stage -
procercoid
second stage -
plerocercoid
it resembles a ribbon appearance and are very primitive
adults
outer surface that absorb nutrients and excrete waste products
tegument
it occur in the life cycle of hymenolepsis nana
autoinfection
what spp. does development of a cyst tissue occur?
Echinococcus granulosus
head portion; it may be globular or spoon-shaped
scolex
flesh extension
rostellum
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