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Parasitic Infections – 30 MCQ Quiz
Medical Microbiology / Parasitology Quiz

Topic: Protozoal infections, helminthic infections and ectoparasites.

Total Questions: 30
Total Marks: 30
Each question carries 1 mark.

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1. Human parasitic infections are broadly divided into: *
Revision feedback: Human parasitic infections are broadly classified into protozoal and helminthic infections. Ectoparasites such as lice and mites are also important.
2. Entamoeba histolytica commonly causes: *
Revision feedback: Entamoeba histolytica causes intestinal amoebiasis and may produce an amoebic liver abscess.
3. The usual mode of transmission of Entamoeba histolytica is: *
Revision feedback: Amoebiasis is usually acquired through ingestion of infective cysts by the fecal-oral route.
4. Which parasite is classically associated with foul-smelling diarrhea and malabsorption? *
Revision feedback: Giardiasis can cause foul-smelling diarrhea, bloating and malabsorption.
5. Trichomonas vaginalis is primarily transmitted by: *
Revision feedback: Trichomonas vaginalis causes trichomoniasis and is sexually transmitted.
6. Malaria is caused by: *
Revision feedback: Malaria is caused by Plasmodium parasites.
7. The important vector for human malaria is: *
Revision feedback: Human malaria is transmitted by infected female Anopheles mosquitoes.
8. Kala-azar is caused by: *
Revision feedback: Kala-azar (visceral leishmaniasis) is associated with Leishmania donovani complex.
9. The vector of visceral leishmaniasis (Kala-azar) is: *
Revision feedback: Leishmania is transmitted by infected female phlebotomine sandflies.
10. Trypanosomiasis may be transmitted by: *
Revision feedback: African trypanosomiasis is transmitted by tsetse flies, while American trypanosomiasis (Chagas disease) is transmitted by triatomine/reduviid bugs.
11. Toxoplasmosis is associated with exposure to: *
Revision feedback: Toxoplasma gondii can be acquired through contaminated cat feces/environment and undercooked meat containing tissue cysts.
12. Ascaris lumbricoides infection is generally acquired through: *
Revision feedback: Ascariasis is acquired by ingestion of infective eggs through fecally contaminated food, water or soil.
13. Hookworm infection is caused by: *
Revision feedback: Ancylostoma and Necator are the major human hookworms.
14. Hookworm larvae commonly enter the human body through: *
Revision feedback: Filariform hookworm larvae can penetrate intact skin, commonly through bare feet.
15. A major clinical consequence of chronic hookworm infection is: *
Revision feedback: Chronic intestinal blood loss caused by hookworms can lead to iron-deficiency anemia.
16. Enterobius vermicularis causes: *
Revision feedback: Enterobius vermicularis is the pinworm.
17. The characteristic symptom of Enterobius vermicularis infection is: *
Revision feedback: Female pinworms migrate to the perianal region, producing characteristic nocturnal pruritus.
18. Trichuris trichiura causes: *
Revision feedback: Trichuris trichiura is the whipworm and causes trichuriasis.
19. Taenia solium infection can cause: *
Revision feedback: Adult Taenia solium causes taeniasis, while ingestion of eggs can result in cysticercosis.
20. Human cysticercosis is acquired by ingestion of: *
Revision feedback: Cysticercosis results from ingestion of Taenia solium eggs.
21. Taenia saginata is commonly acquired from inadequately cooked: *
Revision feedback: Taenia saginata is the beef tapeworm and infection follows ingestion of inadequately cooked infected beef.
22. Hydatid disease is caused by: *
Revision feedback: Echinococcus granulosus is the major cause of cystic hydatid disease.
23. Human hydatid disease is strongly associated with the: *
Revision feedback: Dogs are important definitive hosts of Echinococcus granulosus; humans can become accidental intermediate hosts.
24. Lymphatic filariasis is commonly caused by: *
Revision feedback: Important causes of lymphatic filariasis include Wuchereria bancrofti and Brugia species.
25. Wuchereria bancrofti is commonly transmitted by: *
Revision feedback: Lymphatic filariasis is mosquito-borne; Culex is an important vector in many endemic regions.
26. Schistosomiasis is associated with exposure to: *
Revision feedback: Schistosoma infection is acquired through exposure to freshwater containing infective cercariae.
27. Fasciola hepatica infection is associated with ingestion of: *
Revision feedback: Fasciola hepatica infection can follow ingestion of metacercariae attached to aquatic plants such as watercress.
28. Scabies is caused by: *
Revision feedback: Scabies is caused by the mite Sarcoptes scabiei.
29. Pediculus humanus causes: *
Revision feedback: Pediculus humanus is a human louse and causes pediculosis.
30. Pthirus pubis is commonly known as: *
Revision feedback: Pthirus pubis is the pubic or crab louse and is commonly transmitted through close/sexual contact.
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