Parasitology MCQ I

Question 1 of 42

1. Question

Giardia lamblia: Which of the statements below is incorrect?

It is a flagellated protozoon.
It has a bilaterally symmetrical trophozoite.
Trophozoites are usually located in the sigmoid colon.
Infection is satisfactorily treated with metronidazole.

Question 2 of 42

2. Question

Which of the following statements about Schistosoma mansoni is correct

Adults are found in small branches of the superior mesenteric vein.
Eggs have a terminal spine.
Eggs are satisfactorily demonstrated using the wet mount technique.
Rectal biopsy is a useful investigation in chronic infections.

Question 3 of 42

3. Question

Entamoeba histolytica: Which of the statements below is correct?

It primarily inhabits the upper ileum.
It is hematophagous.
Cysts contain erythrocytes.
Pseudopodia are features of the early cyst forms

Question 4 of 42

4. Question

Which of the following statements about Schistosoma haematobium is correct?

The infective stage matures in subcutaneous tissues.
Eggs are deposited in the walls of the urinary bladder and prostate gland.
Eggs have a prominent lateral spine.
Biopsy of the ascending colon is the best source for eggs.

Question 5 of 42

5. Question

Which of the following is a feature of amebiasis?

Dysentery.
Enteritis.
Involvement of the small intestine.
Severe lower abdominal pain.

Question 6 of 42

6. Question

Which of the following drugs is effective for the treatment of schistosomiasis?

Hydroxyurea.
Apo-hydroxyquine.
Hydroxyzine.
Praziquantel.

Question 7 of 42

7. Question

Dracontiasis: Which of the statements below is correct?

It usually affects the face.
It is spread by the gravid adult female worm discharging larvae when the affected part touches water.
It does not cause arthritis.
It is a cause of low morbidity in endemic areas.

Question 8 of 42

8. Question

Which of the following statements about amebiasis is incorrect?

Flask-shaped ulcers are seen in the submucosa of affected gut.
Sigmoidoscopy shows normal mucosa in-between ulcers.
Perforation of the colon is known to occur.
Ameboma is an acute granulomatous lesion.

Question 9 of 42

9. Question

Which of the following is correct of schistosomiasis?

Pruritus, malaise and cough are unusual symptoms.
Terminal hematuria is usual in Schistosoma mansoni infection.
Dysentery is a symptom seen one to three months after infection with Schistosoma mansoni.
Features of urinary tract obstruction are unlikely in chronic infections.

Question 10 of 42

10. Question

Which of the following is correct of guinea worm infestation?

It involves ingestion of water infested by a crustacean.
It is caused by the bite of Cyclops on the exposed part of the body in contact with water.
Extraction of the larvae is part of treatment.
Ivermectin is use for treatment.

Question 11 of 42

11. Question

Amebic liver abscess: Which of the statements below is correct?

It rarely demonstrates leukocytosis.
It is unlikely when there is a single, large hepatic abscess.
It may present as shoulder tip pain.
It usually contains trophozoites which are demonstrable from abscess aspirates.

Question 12 of 42

12. Question

Scabies: Which of the statements below is correct?

Arthropods are vectors.
The infective stage is the egg.
Nosocomial infection is a likelihood.
Secondary bacterial infection is uncommon

Question 13 of 42

13. Question

Ascariasis: Which of the statements below is correct?

It is a trematode disease.
It is transmitted by the feco-oral route.
It is caused by an adult worm which is not visible to the naked eye.
It can only be diagnosed by stool microscopy.

Question 14 of 42

14. Question

Amebiasis does not involve which of the following?

Pericardium.
Para-colostomy skin.
Penis.
Gluteal skin.

Question 15 of 42

15. Question

Which of the following is not an arthropod-borne disease?

Filariasis.
Hidradenitis suppurativa.
Diphyllobothriasis.
Leishmaniasis.

Question 16 of 42

16. Question

Ascaris lumbricoides: Which of the statements below is correct?

Eggs survive in hot, dry soil.
It is infective at the embryonated egg stage.
It is found in human feces which contains segmented eggs of the worm.
It is a tiny intestinal roundworm.

Question 17 of 42

17. Question

Which of the following statements about amebiasis is correct?

Microscopic examination of a direct wet stool film is a poor means of demonstrating trophozoites.
Stool concentration techniques are more useful in demonstrating cysts than trophozoites
Trophozoites survive on damp soil many weeks after passing them in stools.
Serological tests are not useful for diagnosis.

Question 18 of 42

18. Question

Tunga penetrans: Which of the statements below is correct?

It is a mite.
Found under the toe nail or in the interdigital clefts, it is likely to be a fertilized female.
It feeds on skin debris.
It causes large, deep ulcers which may be secondarily infected by bacteria.

Question 19 of 42

19. Question

Which of the following statements about ascariasis is incorrect?

It is a known cause of lymphocytosis.
It causes intestinal obstruction especially in small children.
It can be treated satisfactorily with pyrantel pamoate.
It may cause cough and abdominal pain.

Question 20 of 42

20. Question

Which of the following statements about filariae is correct?

They are cestodes.
Adults cannot be found in subcutaneous tissues of man.
Microfilariae of most filariae are present in subcutaneous tissues.
Onchocerca volvulus microfilariae are found in subcutaneous and cutaneous tissues only.

Question 21 of 42

21. Question

Regarding amebiasis which of the following statements is correct?

Feco-oral transmission is unexpected.
Hetero- and homo-sexual transmissions are likely.
Transmissison is mainly by the patient with acute diarrheal disease.
Treatment with di-iodohydroxyquin is safe in pregnancy.

Question 22 of 42

22. Question

Hookworm disease: Which of the statements below is correct?

Necator americanus and Ankylostoma duodenale are causative organisms.
It starts with penetration of intact skin by the infective egg.
It causes swimmer’s itch.
It can be diagnosed by macroscopic examination of stools.

Question 23 of 42

23. Question

Which of the following statements about onchocerciasis is incorrect

It causes a dermatitis with leopard skin appearance.
Punctate keratitis and iridocyclitis are features.
Diethylcarbamazine is effective in eliminating adult worms.
Ivermectin sterilizes adult worms.

Question 24 of 42

24. Question

Which of the following statements about Plasmodium is correct?

The male anopheles mosquito transmits malaria parasites.
The female anopheles mosquito feeds on nectar.
Plasmodium falciparum causes the so-called malignant tertian malaria.
Benign tertian malaria is caused by Plasmodium ovale.

Question 25 of 42

25. Question

Hookworm disease: Which of the statements below is correct?

It is a known cause of macrocytic anemia.
It usually causes malabsorption syndrome.
It may coexist with ascariasis.
It causes anemia which is treated with folic acid.

Question 26 of 42

26. Question

Trypanosomes: Which of the statements below is correct?

They are flagellated nematodes.
They have two flagellae which arise from the kinetoplast.
They are present in both intestines and blood of man.
They have glossina as vectors.

Question 27 of 42

27. Question

Which of the following is not a filarial worm?

Dipetalonema perstans.
Iodamoeba butschlii.
Brugia malayi.
Mansonella ozzardi.

Question 28 of 42

28. Question

Cutaneous larva migrans: Which of the statements below is incorrect?

It is caused by dog hookworms.
It manifests as serpiginous cutaneous lesions.
It rarely causes pruritus.
It may be complicated by bacterial infection.

Question 29 of 42

29. Question

Which of the following statements about trypanosomiasis is correct?

Headache is an uncommon symptom.
Winterbottom’s sign is positive.
Somnolence is an early feature.
Secnidazole is a trypanosomicide.

Question 30 of 42

30. Question

Which of the following statements about onchocerciasis is correct?

Simulium damnosum is the intermediate host of the causative organism.
Onchocercomata are malignant nodules containing adult worms.
Skin slit smears demonstrate microfilariae satisfactorily.
The microfilaria is sheathed.

Question 31 of 42

31. Question

Trichuris trichiura: Which of the statements below is incorrect?

It is synonymous with pinworm.
Embryonated egg is the infective stage.
It causes rectal prolapse in children with heavy worm load.
Infestation is satisfactorily treated with mebendazole.

Question 32 of 42

32. Question

Which of the following is descriptive of schistosomes?

Eggs of Schistosoma haematobium have sharp spines.
Eggs are operculated.
They cause human infection when metacercariae are ingested.
Cercariae are released from eggs.

Question 33 of 42

33. Question

Which of the following associations is incorrect?

Crayfish and rickettsialpox
Ticks and relapsing fever.
Xenopsylla cheopis and plague.
Chrysops and loiasis.

Question 34 of 42

34. Question

Enterobiasis: Which of the statements below is correct?

It usually involves the duodenum.
It may result from reinfection by self-contamination
It uncommonly causes pruritus ani.
It is easily diagnosed by stool microscopy for eggs.

Question 35 of 42

35. Question

With regards to lice which of the statements below is incorrect?

They have no predilection for people with poor hygiene.
They are microscopic organisms.
Of the head have larvae which are firmly attached to hairs.
Of the body are frequently found on footwear.

Question 36 of 42

36. Question

Which of the following is not a causally related association?

Toxocara cati and visceral larva migrans.
Leishmania tropica and oriental sore.
Paragonimus uterobilateralis and fish tape-worm disease.
Toxoplasma gondii and cerebral calcifications.

Question 37 of 42

37. Question

Tapeworm: Which of the statements below is correct?

It has proglottides which are the segmented portion of the worm.
Scolex is attached to the most mature portion of the strobila.
Adult is attached to the mucosa of the rectum by the scolex.
Identification in stools, following treatment, is unimportant.

Question 38 of 42

38. Question

Which of the following statements about myiasis is incorrect?

A positive history of close contact with domestic animals is unlikely.
Genito-urinary and intestinal forms are known.
It may cause indolent ulcers.
Definitive diagnosis is by identifying the etiological agent from the affected part.

Question 39 of 42

39. Question

Taeniasis: Which of the statements below is incorrect?

It is acquired by ingesting cysticerci in pork or beef.
It requires two intermediate hosts.
It is diagnosed by gravid proglottid characteristics.
It causes vague abdominal discomfort.

Question 40 of 42

40. Question

Which of the following statements is correct?

Balantidium coli is a flagellated protozoon.
Heterophyes heterophyes is a lung fluke.
Diphyllobothrium latum is a fish tapeworm.
Strongyloides stercoralis is a cestode.

Question 41 of 42

41. Question

Paragonimiasis: Which of the statements below is correct?

It causes cough with bloody sputum.
It simulates tuberculosis radiologically.
It causes marked weight loss.
It is satisfactorily treated with albendazole.

Question 42 of 42

42. Question

Which of the following statements about schistosomes is correct?

They are cestodes.
Eggs of Schistosoma haematobium may be present in urine or stools.
The females have a ventral gynecophoral canal.
Eggs are laid in arterioles.