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cestoda (tapeworm)
shape ?
size ? teguments ?
-Shape: Long, flat, segmented and tape-like.
-Size: - From few millimeters to several meters.
- Has smooth protective tegument.
cestoda (tapeworm) adult body is divided into ? (3) how many suckers ?
scolex (head) (4 suckers with or without rostellum and hooks)
neck (thin part forming all new segments)
strobila (segments or proglottid)
strobila of cestoda may be ? 3
3 انواع اي هم
• Immature: follow the neck, small, without developed genitalia.
• Mature: majority of segments, with well developed genitalia.
• Gravid: lowermost segments, contain only uterus filled with eggs.
what systems does cestoda have ? 2
reproductive system and excretory system
معندوش الاتنين الجايين دول
it doesnt have digestive system (nutrients are absorbed through body wall) and circulatory system
cestode excretory system consists of ?
Multiple flame cells and collecting tubules opening posteriorly on bladder at the last segment.
cestode reproductive system consists of ?
-Multiple testes & bilobed ovary are present in each segment opening together through their ducts in common genital pore
طبعا طبعا كلهم hermaphrodites
cestode
definitive host ?
intermediate host ?
Definitive host: human for most cestodes.
Intermediate host: mainly animals or arthropods.
cestodes complete their life cycle in how many hosts ? exception ?
Cestodes complete their life cycles in two different hosts,
except Hymenolepis nana as man can act as both definitive and intermediate host.
enumerate the 3 larval stages of cestodes ?
1-egg
2-onchosphere
3-cystic larval stage
cestodes egg morpholgy
mature non operculated eggs
what is the infective stage for most cestodes
cystic larval stage
ايه ال cestode
اللي هيجيلك لو عملت الاتي
Ingestion of egg with contaminated food and drink: (3)
a. Taenia solium larva (Cysticercosis)
b. Echinococcus granulosus (hydatidosis)
c. Hymenolepis nana
ايه ال cestode
اللي هيجيلك لو عملت الاتي
Ingestion of larva in
undercooked meat:
undercooked pork:
a. Undercooked meat: Taenia saginata
b. Undercooked pork: Taenia solium
ايه ال cestode
اللي هيجيلك لو عملت الاتي
Ingestion of insect vector containing larva
Hymenolepis nana
ايه ال cestode
اللي هيجيلك لو حصل الاتي
Autoinfection (2)
a. Taenia solium larva (Cysticercosis)
b. Hymenolepis nana
intestinal cestodes are ? (3)
tth تتح 😄
• Taenia saginata
• Taenia solium
• Hymenolepis nana
tissue cestodes are ? (3)
eth اتح 😃
• Echinococcus granulosus
• Taenia solium
• Hymenolepis nana
compare between intestinal cestodes and tissue cestodes
man is which host ?
human harbor (eat) what ?
human eat the cestode in which stage ?
main complaint or problem for the host is ?
diagnosis depends on ?
compare between trematodes and cestodes according to
shape ?
size ?
tegument ?
organs of attachment ?
digestive system ?
genital system ?
compare between trematodes and cestodes according to
I.H ?
stages of life cycle ?
infective stage ?
diagnostic stage ?