Protozoa

Descripción

MCQ for 3rd year medical students
Nada Medhat
Test por Nada Medhat, actualizado hace más de 1 año
Nada Medhat
Creado por Nada Medhat hace más de 5 años
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Resumen del Recurso

Pregunta 1

Pregunta
Each of the following statements concerning malaria is correct EXCEPT:
Respuesta
  • Release of merozoites from red blood cells causes periodic fever and chills.
  • The principal site of gametocyte formation is the human gastrointestinal tract.
  • Early in infection, sporozoites enter hepatocytes.
  • The female Anopheles mosquito is the vector.

Pregunta 2

Pregunta
Which of the following agent is used to prevent Malaria
Respuesta
  • Mebendazole
  • Chloroquine
  • Zinc tablet
  • Inactivated vaccine

Pregunta 3

Pregunta
Laboratory diagnosis of a patient with a suspected liver abscess due to Entamoeba histolytica should include:
Respuesta
  • Stool examination and indirect hemagglutination test
  • Stool examination and blood smear
  • Xenodiagnosis and string test
  • Indirect hemagglutination test and skin test

Pregunta 4

Pregunta
Infective stage of Entamoeba histolytica is:
Respuesta
  • filariform larvae
  • trophozoite
  • quadrinucleate cyst
  • sporozoite

Pregunta 5

Pregunta
A 30-year-old woman presents to her gynecologist with complaints of vaginal itching and a frothy, yellow discharge. She also complains of painful urination. She admits to being sexually active with several men in the past two weeks. Cultures are negative for bacterial growth, but organisms are visible via a wet preparation on low power. The most likely causal agent is
Respuesta
  • Chlamydia trachomatis
  • Giardia lamblia
  • Candida albicans
  • Trichomonas vaginalis

Pregunta 6

Pregunta
Each of the following parasites has an intermediate host as part of its life cycle EXCEPT:
Respuesta
  • Taenia solium
  • Trichomonas vaginalis
  • Echinococcus granulosus
  • Toxoplasma gondii

Pregunta 7

Pregunta
In malaria, the form of plasmodia that is transmitted from mosquito to human is the:
Respuesta
  • Merozoite
  • Hypnozoite
  • Sporozoite
  • Gametocyte

Pregunta 8

Pregunta
Trophozoites, Schizonts and gametocytes of all the malarial parasites are seen in the peripheral blood smear except;
Respuesta
  • P. ovale
  • P. falciparum
  • P. vivax
  • P. malariae

Pregunta 9

Pregunta
A 35-year-old man comes to the emergency department complaining of high fever, chills, severe headache, and confusion. He has recently returned from Africa. A peripheral blood smear reveals multiple ring structures and crescent-shaped gametes. Which of the following organisms is the most likely cause?
Respuesta
  • Plasmodium falciparum
  • Plasmodium malariae
  • Plasmodium vivax
  • Leishmania species

Pregunta 10

Pregunta
Each of the following statements concerning sleeping sickness is correct EXCEPT:
Respuesta
  • Sleeping sickness can be diagnosed by finding eggs in the stool.
  • Sleeping sickness is transmitted by tsetse flies.

Pregunta 11

Pregunta
Each of the following statements concerning kala-azar is correct except:
Respuesta
  • Kala-azar is caused by Leishmania donovani
  • kala-azar is transmitted by the bite of sandflies
  • Kala-azar occurs primarily in rural latin America
  • Kala-azar can be diagnosed by finding amastigotes in bone marrow

Pregunta 12

Pregunta
The pathogenic protozoon with extra-intestinal spread through blood is:
Respuesta
  • Giardia Lamblia
  • Entamoeba coli
  • Isasporabelli
  • Entamoeba histolytica

Pregunta 13

Pregunta
Naegleria fowleri infection is diagnosed by:
Respuesta
  • Blood film
  • Serological examination
  • Lumber puncture
  • None of the above

Pregunta 14

Pregunta
Naegleria fowleri is
Respuesta
  • Permanent parasite of man
  • Free living amoeba
  • Non pathogenic
  • Found in running water stream

Pregunta 15

Pregunta
Acanthamoeba species cause:
Respuesta
  • chronic primary meningoencephalitis
  • keratitis with blindness
  • granuloma of internal organs
  • all of the above

Pregunta 16

Pregunta
regarding toxoplasmosis in humans:
Respuesta
  • becomes active in immuno-compromised patients
  • acute infection could be transmitted from mother to fetus
  • associated with cats
  • is mainly diagnosed by serological tests
  • all of the above

Pregunta 17

Pregunta
oocyst of Toxoplasma is found in:
Respuesta
  • human tissue
  • the brain of chronic patients
  • faeces of infected cat
  • all of the above

Pregunta 18

Pregunta
cryptosporidium multiplies in:
Respuesta
  • the lumen of small intestine
  • the brush border of epithelial lining of small intestine
  • the lumen of large intestine
  • non of the above

Pregunta 19

Pregunta
in visceral Leishmaniasis culture of the biopsy material on NNN medium results in :
Respuesta
  • amastigote form
  • Leptomonas form (promastigote)
  • Epimastigote form
  • Leishmania form

Pregunta 20

Pregunta
Each of the following statements concerning Trypanosoma cruzi is correct EXCEPT:
Respuesta
  • T. cruzi typically affects heart muscle, leading to cardiac failure.
  • T. cruzi occurs primarily in tropical Africa.
  • T. cruzi is transmitted by the reduviid bug.
  • T. cruzi can be diagnosed by seeing amastigotes in a bone marrow aspirate.
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