Module 6: Medically Important Helminths

What is the general term for worms that are restricted to members of the Phylum Platyhelminthes, Nematoda, and Acanthocephala?

Helminths (correct)
Fungi
Protozoa
Arthropods

What is the function of the scolex in cestodes?

Reproduction of the parasite
Production of eggs
Anchorage and attachment to the intestinal wall (correct)
Digestion of nutrients

How do cestodes obtain nutrients?

Through digestion in a digestive system
By absorbing nutrients through their integument (correct)
Through a process of osmosis
By sucking blood from the host

What is the term for the segmented part of a cestode that contains both male and female reproductive systems?

Proglottid (D) Signup and view all the answers

What is the range of pH that cestodes can survive in?

4-11 (B) Signup and view all the answers

What serves as the portal of entry for tapeworms?

Mouth (B) Signup and view all the answers

Where is Diphyllobothriasis infection commonly found?

Northern temperate areas of the world (D) Signup and view all the answers

What is the main host of the Diphyllobothriasis parasite?

Humans, canids, and felines (B) Signup and view all the answers

What is the primary symptom of Diphyllobothriasis infection?

Non-specific abdominal signs (C) Signup and view all the answers

What is the distinguishing feature of the scolex of Taenia solium?

4 suckers with rostellum and a double crown of hooks (A) Signup and view all the answers

What is the treatment for Diphyllobothriasis infection?

Praziquantel 10mg/kg single dose (D) Signup and view all the answers

What is the consequence of Diphyllobothriasis infection on vitamin levels?

Decreased vitamin B12 levels (D) Signup and view all the answers

What is the characteristic shape of mature proglottids of Taenia solium?

Squared shaped (D) Signup and view all the answers

How many branches are present in the uterus of a gravid Taenia solium?

713 branches (B) Signup and view all the answers

What is the shape of the uterus in a mature proglottid?

Rosette-shaped (D) Signup and view all the answers

What is the characteristic of the embryo or oncosphere of Taenia solium eggs?

6 hooked embryo or oncosphere (D) Signup and view all the answers

What is the primary mode of infection for Paragonium westermani?

Eating uncooked freshwater crabs (A) Signup and view all the answers

What is the characteristic feature of the scolex of Taenia saginata?

4 suckers without rostellum and hooks (A) Signup and view all the answers

How long can Diphyllobothrium latum tapeworms grow in humans?

Up to 310 meters (C) Signup and view all the answers

What is the characteristic shape of the ovary in Paragonium westermani?

Lobate shape (B) Signup and view all the answers

Which of the following is NOT a symptom of Paragonimiasis?

Diarrhea (D) Signup and view all the answers

What is the unique structure of Paragonium westermani?

Coffee-bean shape (A) Signup and view all the answers

What is the characteristic of the eggs of Paragonium westermani?

Large with a thick shell (A) Signup and view all the answers

What is the typical duration between infection and the occurrence of a severe eosinophilic granulomatous reaction?

1-2 weeks (A) Signup and view all the answers

What is the reservoir host for Paragonium westermani?

Piscivorous mammals (D) Signup and view all the answers

What is the recommended treatment for Trichinella infection?

Gastroscopic examination/surgical or endoscopic removal (C) Signup and view all the answers

What is the purpose of a stool ova and parasite test?

To detect intestinal parasites and their eggs (D) Signup and view all the answers

What is the characteristic shape of the male Trichinella spiralis?

Tapered at the anterior end and curved at the posterior end (B) Signup and view all the answers

What is the typical location of encysted larvae of Trichinella?

In the pressed muscle tissue inside the cyst (A) Signup and view all the answers