LU3.1 Intro Pt.2 SCAQ Practice

Modes of Parasite Entry into the Host

1. Which of the following is NOT a common mode of parasite entry into the human body?

   • a) Mouth

   • b) Skin

   • c) Ear canal

   • d) Blood transfusion

2. How is Taenia solium typically transmitted to humans?

   • a) Mosquito bite

   • b) Eating undercooked pork

   • c) Skin penetration

   • d) Sexual contact

3. Which of the following parasites enters the human body through contaminated water?

   • a) Plasmodium spp.

   • b) Cryptosporidium spp.

   • c) Leishmania donovani

   • d) Trypanosoma brucei

4. Which parasite enters through the skin by direct penetration?

   • a) Ascaris lumbricoides

   • b) Strongyloides stercoralis

   • c) Giardia lamblia

   • d) Trichomonas vaginalis

5. How does Trypanosoma cruzi enter the body?

   • a) Inhalation of spores

   • b) Contaminated drinking water

   • c) Through breaks in the skin via triatomine bug feces

   • d) Sexual contact

Parasite Distribution in the Host

6. Where do Giardia lamblia and Entamoeba dispar primarily reside in the human body?

   • a) Liver

   • b) Intestinal tract

   • c) Bloodstream

   • d) Lungs

7. Which parasite migrates from the intestines into the liver and lungs?

   • a) Ascaris lumbricoides

   • b) Enterobius vermicularis

   • c) Taenia saginata

   • d) Wuchereria bancrofti

8. Which parasite typically resides in the veins of the urinary bladder?

   • a) Schistosoma haematobium

   • b) Schistosoma mansoni

   • c) Fasciola hepatica

   • d) Paragonimus westermani

9. Which parasite mainly remains in the urogenital tract?

   • a) Plasmodium falciparum

   • b) Trichomonas vaginalis

   • c) Trypanosoma cruzi

   • d) Leishmania donovani

10. What is the primary site of infection for Paragonimus westermani?

• a) Intestines

• b) Lungs

• c) Brain

• d) Lymph nodes

Effects of Parasites on the Host

11. Which parasite is responsible for causing elephantiasis?

• a) Brugia malayi

• b) Giardia lamblia

• c) Trypanosoma brucei

• d) Entamoeba histolytica

12. What clinical symptom is commonly associated with Plasmodium infections?

• a) Skin rash

• b) Fever and chills

• c) Chronic diarrhea

• d) Muscle paralysis

13. Which of the following parasites can cause anemia?

• a) Hookworms

• b) Enterobius vermicularis

• c) Trypanosoma brucei

• d) Cryptosporidium parvum

14. Which of the following parasites can cause intestinal blockage?

• a) Enterobius vermicularis

• b) Ascaris lumbricoides

• c) Trichuris trichiura

• d) Schistosoma japonicum

15. What is a severe complication of Plasmodium falciparum infection?

• a) Neuropathy

• b) Liver failure

• c) Cerebral malaria

• d) Chronic skin ulcers

Parasite Immune Evasion Strategies

16. Which parasite can evade the host's immune system by living inside red blood cells?

• a) Trypanosoma cruzi

• b) Plasmodium spp.

• c) Leishmania donovani

• d) Schistosoma mansoni

17. Trypanosoma brucei evades the host’s immune response by:

• a) Living inside macrophages

• b) Changing its surface antigens

• c) Secreting toxins to kill immune cells

• d) Rapidly leaving the bloodstream

18. How does Schistosoma spp. evade host immunity?

• a) Hiding inside red blood cells

• b) Suppressing the immune response

• c) Covering itself with host antigens

• d) Inducing apoptosis in white blood cells

Vector-Borne Parasitic Diseases

19. What is the vector for malaria?

• a) Aedes mosquito

• b) Culex mosquito

• c) Anopheles mosquito

• d) Tsetse fly

20. Which vector transmits leishmaniasis?

• a) Tsetse fly

• b) Sandfly

• c) Anopheles mosquito

• d) Triatomine bug

21. Trypanosoma brucei is transmitted by:

• a) Tsetse fly

• b) Triatomine bug

• c) Sandfly

• d) Mansonia mosquito

22. What is the main mode of transmission for lymphatic filariasis?

• a) Contaminated water

• b) Mosquito bites

• c) Ingestion of infected meat

• d) Direct human-to-human contact

Prevention and Control of Parasitic Diseases

23. Which of the following is a key measure to prevent schistosomiasis?

• a) Vaccination

• b) Avoiding contaminated water

• c) Using bed nets

• d) Taking antibiotics

24. What is the purpose of mass chemotherapy in controlling parasitic infections?

• a) Eradicate all parasites permanently

• b) Reduce parasite burden in a population

• c) Provide lifelong immunity

• d) Eliminate the need for vector control

25. Which of the following best describes the role of environmental engineering in parasite control?

• a) Eliminating mosquito breeding sites

• b) Administering vaccines

• c) Providing mass chemotherapy

• d) Increasing antibiotic distribution

26. What is the recommended control strategy for Taenia saginata infection?

• a) Vaccination

• b) Proper cooking of beef

• c) Avoiding stagnant water

• d) Using insect repellents

27. What is the primary method of preventing Giardia and Cryptosporidium infections?

• a) Avoiding mosquito bites

• b) Ensuring safe drinking water

• c) Using insecticide-treated nets

• d) Taking prophylactic antibiotics

28. Which of the following is a challenge in developing vaccines for parasitic infections?

• a) Parasites are too small to detect

• b) Parasites undergo antigenic variation

• c) Parasites are resistant to vaccines

• d) Parasites only affect animals

29. Which method is most effective in controlling lymphatic filariasis?

• a) Annual mass drug administration

• b) Avoiding contaminated food

• c) Wearing insect repellent

• d) Using antibiotics

30. What is the main reason why sanitation is critical for controlling parasitic diseases?

• a) It reduces the population of insect vectors

• b) It prevents human exposure to infective parasite stages

• c) It improves overall immune function

• d) It kills parasites directly

Answer Key

1 c 2. b 3. b 4. b 5. c 6. b 7. a 8. a 9. b 10. b

11 a 12. b 13. a 14. b 15. c 16. b 17. b 18. c 19. c 20. b

21 a 22. b 23. b 24. b 25. a 26. b 27. b 28. b 29. a 30. b