Clinical Parasitology: Cestodes Module 4

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What is unique about Hymenolepis nana among the Cestodes?

It is a true tapeworm

It has two life cycles: Direct and Indirect (correct)

It has a single life cycle

It is a false tapeworm

Which of the following Cestodes belongs to Pseudophyllidea?

Echinococcus granulosus

Taenia solium

Diphyllobothrium latum (correct)

Hymenolepis nana

What is the characteristic of the adult worm in the intestines of the definitive host?

It absorbs nutrients and excretes waste products through its outer surface (correct)

It has a complex body structure

It has multiple hosts

It has a single larval stage

What is the result of human ingestion of egg or larval stage of Cestodes?

An adult worm eventually emerges in the intestine (B) Signup and view all the answers

What is the characteristic of the eggs of Diphyllobothrium latum?

They are operculated (B) Signup and view all the answers

What characteristic do cestodes possess, which is unlike other helminths?

Having a longer lifespan (B) Signup and view all the answers

What is the classification of cestodes?

Phylum: Platyhelminthes, Class: Cestoda (A) Signup and view all the answers

What is the laboratory diagnosis method most commonly used for Cestodes?

Stool examination (C) Signup and view all the answers

What is the characteristic of the body of adult tapeworms?

Flattened and ribbon-like (B) Signup and view all the answers

What is the developmental stage of cestodes that inhabit tissues?

Larva (D) Signup and view all the answers

What is the characteristic of the cuticle that covers the body of cestodes?

It is resistant to damage (B) Signup and view all the answers

What is the exception to the hexacanth embryo in the phylum Platyhelminthes?

Echinococcus granulosus (A) Signup and view all the answers

What is the characteristic feature of the scolex of T.solium?

Double row of brown chitinous hooks (A) Signup and view all the answers

Which of the following tapeworms has a rudimentary apical rostellum without hooks?

H.diminuta (B) Signup and view all the answers

What is the function of the rostellum in the scolex?

Attachment and penetration of the intestinal mucosa (B) Signup and view all the answers

Which of the following tapeworms has a retractile rostellum with single row of Y-shaped hooks?

H.nana (D) Signup and view all the answers

What is the shape of the scolex of D.latum?

Spatulate/Spoon Shaped (A) Signup and view all the answers

Which of the following tapeworms has no rostellum or hooks?

T.saginata (B) Signup and view all the answers

What is the distinctive feature of H.nana hexacanth in terms of its presence in the intestinal wall of infected host?

Presence of 6 small hooks (hooklets), arranged in pairs (B) Signup and view all the answers

Which of the following is NOT a clinical symptom of intestinal cestode infection?

Fever (A) Signup and view all the answers

What is the characteristic feature of the uterus in mature gravid segments of D.latum?

Not distinct (C) Signup and view all the answers

What is the typical location of the genital pore in mature gravid segments of cestodes?

Laterally located (C) Signup and view all the answers

Which of the following cestodes has a characteristic persistent cough as a clinical symptom?

T.solium (B) Signup and view all the answers

What is the characteristic feature of the segments of E.granulosus?

Presence of 1 set of reproductive structure (C) Signup and view all the answers

What is the characteristic of the uterus in a gravid segment of E. granulosus?

Sac-like and not usually visible (D) Signup and view all the answers

Which of the following tapeworms has an intermediate host of cattles or cows?

Taenia saginata (B) Signup and view all the answers

What is the characteristic of the proglottid of a typical taeniid?

Armed with hooks (C) Signup and view all the answers

How many segments can a Taenia solium tapeworm produce?

800-1000 (B) Signup and view all the answers

What is the characteristic of the infective stage of Taenia saginata?

Cysticercus cellulosae (B) Signup and view all the answers

What is the length of the adult tapeworm of D. latum?

5-10 m (D) Signup and view all the answers