PARASITOLOGY ASSESSMENT RATIONALIZATION

BOARD EXAM

INTESTINAL VENULES

The main anatomic location of Schistosoma mansoni adult worms is:

SPOROZOITE

In malaria, the form of plasmodia that is transmitted from mosquito to human is the:

LEISHMANIA DONOVANI

Which one of the following protozoa primarily infects macrophages?

TRICHOMONAS VAGINALIS

Each of the following parasites has an intermediate host as part of its life cycle, EXCEPT:

ENTEROBIUS VERMICULARIS

Each of the following parasites passes through the lung during human infection, EXCEPT:

SCHISTOSOMA MANSONI

Each of the following parasites is transmitted by flies, EXCEPT:

LEISHMANIA DONOVANI

Each of the following parasites is transmitted by mosquitoes, EXCEPT:

ASCARIS LUMBRICOIDES

Pigs or dogs are the source of human infection by each of the following parasites, EXCEPT:

ANCYLOSTOMA DUODENALE

Each of the following parasites is transmitted by eating inadequately cooked fish or seafood, EXCEPT:

STOOL EXAMINATION AND INDIRECT HEMAGGLUTINATION TEST

Laboratory diagnosis of a patient with a suspected liver abscess due to Entamoeba histolytica should include:

a. Stool examination and indirect hemagglutination test

b. Stool examination and blood smear

c. Indirect hemagglutination test and skin test

d. Xenodiagnosis and string test

TOXOPLASMA GONDII CAN BE DIAGNOSED BY FINDING TROPHOZOITE IN THE STOOL

Each of the following statements concerning Toxoplasma gondii is correct, except:

GIARDIA LAMBIA CAUSES HEMOLYTIC ANEMIA

Each of the following statements concerning Giardia lamblia is correct, except:

THE PRINCIPAL SITE OF GAMETOCYTE FORMATION IS THE HUMAN GASTROINTESTINAL TRACT

Each of the following statements concerning malaria is correct, except:

TRICHOMONAS VAGINALIS CAUSES BLOODY DIARRHEA

Each of the following statements concerning Trichomonas vaginalis is correct, except:

CHLOROQUINE

Which one of the following agents can be used to prevent malaria?

TRYPANOSOMA CRUZI OCCURS PRIMARILY IN TROPICAL AFRICA

Each of the following statements concerning Trypanosoma cruzi is correct, except:

SLEEPING SICKNESS CAN BE DIAGNOSED BY FINDING EGGS IN THE STOOL

Each of the following statements concerning sleeping sickness is correct, except:

KALA-AZAR OCCURS PRIMARILY IN RURAL LATIN AMERICA

Each of the following statements concerning kala-azar is correct, except:

DIPHYLLOBOTHRIUM LATUM IS A TAPEWORM THAT HAS A SCOLEX WITH A CIRCLE OF HOOKS

Each of the following statements concerning Diphyllobothrium latum is correct, except:

THE DISEASE OCCURS PRIMARILY IN TROPICAL AFRICA

Each of the following statements concerning hydatid cyst disease is correct, except:

SCHISTOSOMA HAEMOTOBIUM EGGS HAVE NO SPINE

Each of the following statements concerning Schistosoma haematobium is correct, except:

HOOKWORM INFECTION CAN BE DIAGNOSED BY FINDING THE TROPHOZOITE IN THE STOOL

Each of the following statements concerning hookworm infection is correct, except:

ASCARIS LUMBRICOIDES CAN CAUSE PNEUMONIA

Each of the following statements concerning Ascaris lumbricoides is correct, except:

STRONGYLOIDES STERCORALIS IS ACQUIRED BY INGESTION OF EGGS

Each of the following statements concerning Strongyloides stercoralis is correct, except:

TRICHINOSIS IS CAUSED BY A PROTOZOAN THAT HAS BOTH A TROPHOZOITE AND CYST STAGE IN ITS LIFE CYCLE

Each of the following statements concerning trichinosis is correct, except:

ENTAMOEBA HISTOLYTICA CAUSES “FLASK-SHAPED” ULCERATION IN THE COLON MUCOSA

Regarding Entamoeba histolytica, which one of the following is most accurate?

INFECTION BY. G LAMBIA OCCURS PRINICIPALLY IN THE SMALL INTESTINE, FREQUENTLY RESULTING IN THE MALABSORPTION OF FAT AND FOUL-SMELLING, FROTHY, FAT-CONTAINING STOOL

Regarding Giardia lamblia, which one of the following is most accurate?

C. LABORATORY DIAGNOSIS INVOLVES SEEING CYSTS OF THE ORGANISM IN AN ACID-FAST STAIN OF THE STOOL

Regarding Cryptosporidium hominis, which one of the following is most accurate?

THE DRUG OF CHOICE FOR TRICHOMONIASIS IS METRONIDAZOLE

Regarding Trichomonas vaginalis, which one of the following is most accurate?

CRYPTOSPORIDIUM HOMINIS

Your patient is a 30-year-old man with persistent watery diarrhea for 2 weeks. He is HIV antibody positive with a CD4 count of 10. Routine stool culture revealed no bacterial pathogen. Ova and parasite analysis revealed cysts that stained red in an acid-fast stain. Of the following, which one is the most likely cause of this infection?

THESE ORGANISMS ARE TRANSMITTED BY THE BITE OF FEMALE ANOPHELES MOSQUITOES

Regarding Plasmodium species, which one of the following is most accurate?

ARTEMISININ DERIVATIVES, SUCH AS ARTESUNATE AND ARTEMETHER, ARE EFFECTIVE IN THE TREATMENT OF MULTIPLE-DRUG RESISTANT P. FALCIPARUM

Regarding drugs used to treat or prevent malaria, which one of the following is most accurate?

THE MOST IMPORTANT DEFINITIVE HOST (THE HOST IN WHICH THE SEXUAL CYCLE OCCURS) FOR TOXOPLASMA IS THE DOMESTIC CAT

Regarding T. gondii, which one of the following is most accurate?

THE VECTOR FOR T. CRUZI , THE CAUSE OF CHAGAS’ DISEASE, IS THE REDUVIID (CONE-NOSED) BUG

Regarding Trypanosoma cruzi, which one of the following is most accurate?

BOTH VISCERAL LEISHMANIASIS AND CUTANEOUS LEISHMANIASIS ARE TRANSMITTED BY THE BITE OF SANDFLIES

Regarding leishmaniasis, which one of the following is most accurate?

THEY ARE FREE-LIVING AMOEBAS THAT LIVE IN WARM FRESH WATER

Regarding Acanthamoeba and Naegleria species, which one of the following is most accurate?