BOC parasitology Test Questions and 100% Correct
Answers
Artifacts found in a stool specimen that can be confused with ova or cysts are:
a. partially digested meat fibers
b. degenerated cells from the gastrointestinal mucosa
c. dried chemical crystals
d. pollen grains
D
Polyvinyl alcohol used in the preparation of permanently stained smears of fecal material:
a. concentrates eggs
b. dissolves artifacts
c. serves as an adhesive
d. enhances stain penetration
C
A method to culture Acanthamoeba sp from corneal ulcer scrapings is to inoculate
a. McCoy cells
b. Novy, MacNeal and Nicolle (NNN) medium
c. an agar plate overlaid with Escherichia coli
d. Regan-Lowe medium
C
Primary amoebic encephalitis is caused by:
a. Entamoeba coli
, b. Dientamoeba fragilis
c. Endolimax nana
d. Naegleria fowleri
D
A formed stool is received in the laboratory at 3AM for ova and parasite exam. The night
shift technologist is certain that the workload will prevent examination of the specimen
until 6 AM when the next shift arrives. The technologist should:
a. request that a new specimen be collected after 6AM
b. perform a zinc sulfate floatation procedure for eggs and hold the remaining specimen at
room temperature
c. examine a direct prep for trophozoites and freeze the remaining specimen
d. preserve the specimen in formalin until it can be examined
D
The advantage of thick blood smears for malarial parasites is to:
a. improve staining of the organisms
b. improve detection of the organisms
c. remove RBC artifacts
d. remove platelets
B
Multifocal brain lesions in AIDS patients are commonly caused by:
a. Toxoplasma gondii
b. Pneumocystis jiroveci
Answers
Artifacts found in a stool specimen that can be confused with ova or cysts are:
a. partially digested meat fibers
b. degenerated cells from the gastrointestinal mucosa
c. dried chemical crystals
d. pollen grains
D
Polyvinyl alcohol used in the preparation of permanently stained smears of fecal material:
a. concentrates eggs
b. dissolves artifacts
c. serves as an adhesive
d. enhances stain penetration
C
A method to culture Acanthamoeba sp from corneal ulcer scrapings is to inoculate
a. McCoy cells
b. Novy, MacNeal and Nicolle (NNN) medium
c. an agar plate overlaid with Escherichia coli
d. Regan-Lowe medium
C
Primary amoebic encephalitis is caused by:
a. Entamoeba coli
, b. Dientamoeba fragilis
c. Endolimax nana
d. Naegleria fowleri
D
A formed stool is received in the laboratory at 3AM for ova and parasite exam. The night
shift technologist is certain that the workload will prevent examination of the specimen
until 6 AM when the next shift arrives. The technologist should:
a. request that a new specimen be collected after 6AM
b. perform a zinc sulfate floatation procedure for eggs and hold the remaining specimen at
room temperature
c. examine a direct prep for trophozoites and freeze the remaining specimen
d. preserve the specimen in formalin until it can be examined
D
The advantage of thick blood smears for malarial parasites is to:
a. improve staining of the organisms
b. improve detection of the organisms
c. remove RBC artifacts
d. remove platelets
B
Multifocal brain lesions in AIDS patients are commonly caused by:
a. Toxoplasma gondii
b. Pneumocystis jiroveci
