BOC parasitology Test Questions With
100% Verified Correct Answers
A liquid stool specimen is collected at 10:00 pm and brought to the lab for culture
and ova and parasite examination. It is refrigerated until 10:10 AM the next day,
when the physician requests that the technologist look or amoebic trophozoites.
The best course of action would be to:
a. request a fresh specimen
b. perform a concentration on the original specimen
c. perform a trichome satin on the original specimen
d. perform a saline wet mount on the original specimen - ANSWER -A
Small protozoan cysts are found in a wet mount of sediment from ethyl-acetate
concentrated material. Each cyst has 4 nuclei that do not have peripheral chromatin
and each nucleus has a large karyosome, which appears as a refractive dot. These
oval cysts are most likely:
a. Endolimax nana
b. Chilomastix mesnili
c. Entamoeba histolytica
d. Entamoeba hartmanni - ANSWER -A (note the large karyosome with dot)
The term "internal autoinfection" is generally used in referring to infections with:
a. Ascaris lumbricoides
b. Necator americanus
c. Trichuris trichiura
d. Strongyloides stercoralis - ANSWER -D
Proper collection of a sample for recovery of Enterobius vermicularis includes
collection:
a. a 24-hr urine collection
b. a first morning stool collection with proper preservative
c. a scotch tape preparation from the perianal region
d. peripheral blood from a finger - ANSWER -C
A fibrous skin nodule is removed from the back of a patient from Central
America. A microfilaria seen upon microscopic exam of the nodule is most likely:
a. Wuchereria bancrofti
b. Brugia malayi
, c. Onchocerca volvulus
d. Loa loa - ANSWER -C
Refer to the following image:
The egg depicted above is most likely to be found in children suffering from
a. diarrhea
b. constipation
c. perianal itching
d. stomach pain - ANSWER -C
Refer to the following illustration:
The specimen of choice for finding the above parasite is:
a. stool
b. duodenal washing
c. rectal swab
d. scotch tape preparation - ANSWER -D
Human feces is not recommended specimen in the detection of:
a. Strongyloides stercoralis
b. Entamoeba histolytica
c. Echinococcus granulosus
d. Ancylostoma duodenale - ANSWER -C
The causative agent of cysticercosis is:
a. Taenia solium
b. Taenia saginata
c. Ascaris lumbricoides
d. Trichuris trichiura - ANSWER -A
Organisms that can be easily identified to the species level from the ova in fecal
specimens
a. Metagonimus yokogawai, Heterophyes heterophes
b. Taenia solium, Taenia saginata
c. Necator americanus, Ancylostoma duodenale
d. Paragonimus westermani, Hymenolepis nana - ANSWER -D
The preferred specimen for the diagnosis of paragonimiasis is:
a. bile drainage
b. blood smear
c. skin snips
100% Verified Correct Answers
A liquid stool specimen is collected at 10:00 pm and brought to the lab for culture
and ova and parasite examination. It is refrigerated until 10:10 AM the next day,
when the physician requests that the technologist look or amoebic trophozoites.
The best course of action would be to:
a. request a fresh specimen
b. perform a concentration on the original specimen
c. perform a trichome satin on the original specimen
d. perform a saline wet mount on the original specimen - ANSWER -A
Small protozoan cysts are found in a wet mount of sediment from ethyl-acetate
concentrated material. Each cyst has 4 nuclei that do not have peripheral chromatin
and each nucleus has a large karyosome, which appears as a refractive dot. These
oval cysts are most likely:
a. Endolimax nana
b. Chilomastix mesnili
c. Entamoeba histolytica
d. Entamoeba hartmanni - ANSWER -A (note the large karyosome with dot)
The term "internal autoinfection" is generally used in referring to infections with:
a. Ascaris lumbricoides
b. Necator americanus
c. Trichuris trichiura
d. Strongyloides stercoralis - ANSWER -D
Proper collection of a sample for recovery of Enterobius vermicularis includes
collection:
a. a 24-hr urine collection
b. a first morning stool collection with proper preservative
c. a scotch tape preparation from the perianal region
d. peripheral blood from a finger - ANSWER -C
A fibrous skin nodule is removed from the back of a patient from Central
America. A microfilaria seen upon microscopic exam of the nodule is most likely:
a. Wuchereria bancrofti
b. Brugia malayi
, c. Onchocerca volvulus
d. Loa loa - ANSWER -C
Refer to the following image:
The egg depicted above is most likely to be found in children suffering from
a. diarrhea
b. constipation
c. perianal itching
d. stomach pain - ANSWER -C
Refer to the following illustration:
The specimen of choice for finding the above parasite is:
a. stool
b. duodenal washing
c. rectal swab
d. scotch tape preparation - ANSWER -D
Human feces is not recommended specimen in the detection of:
a. Strongyloides stercoralis
b. Entamoeba histolytica
c. Echinococcus granulosus
d. Ancylostoma duodenale - ANSWER -C
The causative agent of cysticercosis is:
a. Taenia solium
b. Taenia saginata
c. Ascaris lumbricoides
d. Trichuris trichiura - ANSWER -A
Organisms that can be easily identified to the species level from the ova in fecal
specimens
a. Metagonimus yokogawai, Heterophyes heterophes
b. Taenia solium, Taenia saginata
c. Necator americanus, Ancylostoma duodenale
d. Paragonimus westermani, Hymenolepis nana - ANSWER -D
The preferred specimen for the diagnosis of paragonimiasis is:
a. bile drainage
b. blood smear
c. skin snips
