Pregunta 1
Pregunta
Each of the following statements concerning malaria is correct EXCEPT:
Respuesta
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Release of merozoites from red blood cells causes periodic fever and chills.
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The principal site of gametocyte formation is the human gastrointestinal tract.
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Early in infection, sporozoites enter hepatocytes.
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The female Anopheles mosquito is the vector.
Pregunta 2
Pregunta
Which of the following agent is used to prevent Malaria
Respuesta
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Mebendazole
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Chloroquine
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Zinc tablet
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Inactivated vaccine
Pregunta 3
Pregunta
Laboratory diagnosis of a patient with a suspected liver abscess due to Entamoeba histolytica should include:
Respuesta
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Stool examination and indirect hemagglutination test
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Stool examination and blood smear
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Xenodiagnosis and string test
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Indirect hemagglutination test and skin test
Pregunta 4
Pregunta
Infective stage of Entamoeba histolytica is:
Respuesta
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filariform larvae
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trophozoite
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quadrinucleate cyst
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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
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Chlamydia trachomatis
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Giardia lamblia
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Candida albicans
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Trichomonas vaginalis
Pregunta 6
Pregunta
Each of the following parasites has an intermediate host as part of its life cycle EXCEPT:
Respuesta
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Taenia solium
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Trichomonas vaginalis
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Echinococcus granulosus
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Toxoplasma gondii
Pregunta 7
Pregunta
In malaria, the form of plasmodia that is transmitted from mosquito to human is the:
Respuesta
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Merozoite
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Hypnozoite
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Sporozoite
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Gametocyte
Pregunta 8
Pregunta
Trophozoites, Schizonts and gametocytes of all the malarial parasites are seen in the peripheral blood smear except;
Respuesta
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P. ovale
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P. falciparum
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P. vivax
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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
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Plasmodium falciparum
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Plasmodium malariae
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Plasmodium vivax
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Leishmania species
Pregunta 10
Pregunta
Each of the following statements concerning sleeping sickness is correct EXCEPT:
Pregunta 11
Pregunta
Each of the following statements concerning kala-azar is correct except:
Respuesta
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Kala-azar is caused by Leishmania donovani
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kala-azar is transmitted by the bite of sandflies
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Kala-azar occurs primarily in rural latin America
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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
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Giardia Lamblia
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Entamoeba coli
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Isasporabelli
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Entamoeba histolytica
Pregunta 13
Pregunta
Naegleria fowleri infection is diagnosed by:
Respuesta
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Blood film
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Serological examination
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Lumber puncture
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None of the above
Pregunta 14
Pregunta
Naegleria fowleri is
Pregunta 15
Pregunta
Acanthamoeba species cause:
Pregunta 16
Pregunta
regarding toxoplasmosis in humans:
Respuesta
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becomes active in immuno-compromised patients
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acute infection could be transmitted from mother to fetus
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associated with cats
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is mainly diagnosed by serological tests
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all of the above
Pregunta 17
Pregunta
oocyst of Toxoplasma is found in:
Pregunta 18
Pregunta
cryptosporidium multiplies in:
Respuesta
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the lumen of small intestine
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the brush border of epithelial lining of small intestine
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the lumen of large intestine
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non of the above
Pregunta 19
Pregunta
in visceral Leishmaniasis culture of the biopsy material on NNN medium results in :
Pregunta 20
Pregunta
Each of the following statements concerning Trypanosoma cruzi is correct EXCEPT:
Respuesta
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T. cruzi typically affects heart muscle, leading to cardiac failure.
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T. cruzi occurs primarily in tropical Africa.
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T. cruzi is transmitted by the reduviid bug.
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T. cruzi can be diagnosed by seeing amastigotes in a bone marrow aspirate.