2-Intestinal Cestode Concise Pharmacy

Life cycle in human trematodes

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Intestinal Cestodes

Dr Mohiedden M Abdul-Fattah Abdul-Fatt ah









1- Adult Adult in intestine of man

1- Adult Adult in intestine of Man

Pseudophyllidea: Diphyllobothrium latum

4-

2nd

larva in fish

2-Egg 2Egg in water

3- 1st Larva in cyclops 1- Adult Adult in intestine of Man

Cyclophyllidea: 1.Taenia saginata 2.T. 2.T. solium s olium 3.Hymenolepis nana. 4.H. diminuta 5.Dipylidium caninum

3-Larva in 3-Larva tissue of IH

2-Egg 2Egg in soil









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Man is usually infected by intestinal cestodes when ingests the larvae except H.nana, infection occurs by eggs. All Cyclophyllidea must need one intermediate host in their life cycle except H. nana The IH in Taenia is vertebrate host (cattle or pigs). In Hymenolepis and Dipylidium it is invertebrate insect (fleas, beetles or cockroach) Pseudophyllidea (D. latum)









OUTLINE OF LLIFE CYCLE IN INTESTINAL CESTODES CESTODES









1.

Biology:

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Final host: human. Habitat: small intestine . Exit stage: mature egg or

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gravid segments. 

Diagnostic morphology of adult:

1.

segmented 4-7 meter long

2.

with globular scolex without

Taenia saginata











Taenia Life Cycle











4. Lab Diagnosis:  Detection of either of the following in stool: 

the non hooked scolex of the adult after treatment,











2. Epidemiology  Distribution: cosmopolitan. Intermediate host: cattle.  Infective stage: Cysticercus bovis larva in meat.  Mode of infection: ingestion of under cooked 











5. Treatment:  Praziquantel is the drug of choice,(1020mg/kg PO for single dose), or 

Niclosamide (1-2 g children and 4 g for adults; for single dose).











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Biology: Man is the only final host but can act as blind end intermediate host also. Habitat: small intestine Exit stage from the final host:

Taenia solium













Taenia solium Life Cycle













2. Epidemiology













3. Host parasite relationship:













5. Treatment:













Hymenolepis nana









































































































OUTLINE OF LLIFE CYCLE IN INTESTINAL CESTODES CESTODES

2-Intestinal Cestode Concise Pharmacy

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