Question 1

An amoebic trophozoite that can be described as 15 to 20 microns, with fine uniform nuclear peripheral chromatin, central karyosome, and finely granular cytoplasm would most likely be

Accepted Answer

A)  Entamoeba histolytica.
B)  E.coli.
C)  Iodamoeba bütschlii.
D)  E.hartmanni. A

Question 2

The most common larvae found in stool specimens is

Accepted Answer

A)  Ascaris lumbricoides.
B)  Strongyloides stercoralis.
C)  Paragonimus westermani.
D)  Naegleria fowleri. B

Question 3

The specimen of choice for diagnosing infection with Leishmania spp is

Accepted Answer

A)  feces.
B)  blood smear.
C)  liver tissue.
D)  CSF. C

Question 4

A red blood cell parasite that can be described as infecting older and younger RBCs, presenting in mostly young ring forms, and having a crescent-shaped or banana gametocyte would most likely be

Accepted Answer

A)  Plasmodium malariae.
B)  Plasmodium vivax.
C)  Plasmodium falciparum.
D)  Babesia microti.

Question 5

Sputum may be submitted for examination for which parasite?

Accepted Answer

A)  Ascaris lumbricoides
B)  Strongyloides stercoralis
C)  Paragonimus westermani
D)  Echinococcus granulosus
E)  All of the above are correct.

Question 6

Match the parasite with the best diagnostic specimen type.
-Trichomonas vaginalis

Accepted Answer

A)  Feces
B)  Blood smear
C)  Vaginal secretions
D)  CSF
E)  Skin scraping

Question 7

Match the parasite with the best diagnostic specimen type.
-Naegleria fowleri

Accepted Answer

A)  Feces
B)  Blood smear
C)  Vaginal secretions
D)  CSF
E)  Skin scraping

Question 8

Match the parasite with the best diagnostic specimen type.
-Enterobius vermicularis

Accepted Answer

A)  Rectal tape prep
B)  Tissue biopsy
C)  Sputum
D)  Feces
E)  Blood smear

Question 9

The Schistosoma species with a prominent lateral spine is

Accepted Answer

A)  Schistosoma japonicum.
B)  Schistosoma haematobium.
C)  Schistosoma mansoni.
D)  Schistosoma westermani.

Question 10

The eggs of which intestinal parasite are not commonly found in feces and must be detected by other diagnostic techniques?

Accepted Answer

A)  Giardia lamblia
B)  Cryptosporidium parvum
C)  Clonorchis sinensis
D)  Enterobius vermicularis

Question 11

Match the parasite with the best diagnostic specimen type.
-Cryptosporidium spp.

Accepted Answer

A)  Feces
B)  Blood smear
C)  Vaginal secretions
D)  CSF
E)  Skin scraping

Question 12

Match the parasite with the best diagnostic specimen type.
-Toxoplasma gondii

Accepted Answer

A)  Feces
B)  Blood smear
C)  Vaginal secretions
D)  CSF
E)  Skin scraping

Question 13

A red blood cell parasite that can be described as infecting younger RBCs, having Schüffner's dots, presenting in all stages, and having 12 to 24 merozoites would most likely be

Accepted Answer

A)  Plasmodium malariae.
B)  Plasmodium vivax.
C)  Plasmodium falciparum.
D)  Babesia microti.

Question 14

Match the parasite with the best diagnostic specimen type.
-Paragonimus westermani

Accepted Answer

A)  Feces
B)  Blood smear
C)  Vaginal secretions
D)  CSF
E)  Skin scraping

Question 15

Match the parasite with the best diagnostic specimen type.
-Taenia solium

Accepted Answer

A)  Rectal tape prep
B)  Tissue biopsy
C)  Sputum
D)  Feces
E)  Blood smear

Question 16

Match the parasite with the best diagnostic specimen type.
-Giardia lamblia

Accepted Answer

A)  Feces
B)  Blood smear
C)  Vaginal secretions
D)  CSF
E)  Skin scraping

Question 17

Match the parasite with the best diagnostic specimen type.
-Trypanosoma cruzi

Accepted Answer

A)  Feces
B)  Blood smear
C)  Vaginal secretions
D)  CSF
E)  Skin scraping

Question 18

The concentration part of the O&P (ova and parasite) examination

Accepted Answer

A)  requires freshly passed, unpreserved stool.
B)  is designed to allow detection of protozoan cysts, coccidian oocysts, microsporidial spores, and helminth eggs and larvae.
C)  is examined microscopically at low, high dry, and oil immersion magnifications.
D)  is designed to facilitate identification of intestinal protozoa.
E)  All of the above are correct.

Question 19

Match the parasite with the best diagnostic specimen type.
-Strongyloides stercoralis

Accepted Answer

A)  Rectal tape prep
B)  Tissue biopsy
C)  Sputum
D)  Feces
E)  Blood smear

Question 20

Match the parasite with the best diagnostic specimen type.
-Entamoeba histolytica

Accepted Answer

A)  Feces
B)  Blood smear
C)  Vaginal secretions
D)  CSF
E)  Skin scraping

Exam 46: Laboratory Methods for Diagnosis of Parasitic Infections

An amoebic trophozoite that can be described as 15 to 20 microns, with fine uniform nuclear peripheral chromatin, central karyosome, and finely granular cytoplasm would most likely be

The most common larvae found in stool specimens is

The specimen of choice for diagnosing infection with Leishmania spp is

A red blood cell parasite that can be described as infecting older and younger RBCs, presenting in mostly young ring forms, and having a crescent-shaped or banana gametocyte would most likely be

Sputum may be submitted for examination for which parasite?

Match the parasite with the best diagnostic specimen type. -Trichomonas vaginalis

Match the parasite with the best diagnostic specimen type. -Naegleria fowleri

Match the parasite with the best diagnostic specimen type. -Enterobius vermicularis

The Schistosoma species with a prominent lateral spine is

The eggs of which intestinal parasite are not commonly found in feces and must be detected by other diagnostic techniques?

Match the parasite with the best diagnostic specimen type. -Cryptosporidium spp.

Match the parasite with the best diagnostic specimen type. -Toxoplasma gondii

A red blood cell parasite that can be described as infecting younger RBCs, having Schüffner's dots, presenting in all stages, and having 12 to 24 merozoites would most likely be

Match the parasite with the best diagnostic specimen type. -Paragonimus westermani

Match the parasite with the best diagnostic specimen type. -Taenia solium

Match the parasite with the best diagnostic specimen type. -Giardia lamblia

Match the parasite with the best diagnostic specimen type. -Trypanosoma cruzi

The concentration part of the O&P (ova and parasite) examination

Match the parasite with the best diagnostic specimen type. -Strongyloides stercoralis

Match the parasite with the best diagnostic specimen type. -Entamoeba histolytica