Parasitology Final Exam Review
The peripheral chromatin pattern of the nucleus of Entamoeba histolytica is: -
answersevenly distributed
Which tissue-invading protozoan causes severe destruction of CNS tissue and has both
amebic and flagellated morphological forms at some point in its life cycle? -
answersNaegleria fowleri
Cysts of Entamoeba histolytica have: - answersone to four nuclei
The largest protozoan known to parasitize man is: - answersBalantidium coli
In the urban setting, Cryptosporidium is usually found in patients with: - answersAIDS
Sporogony is: - answerssexual reproduction
In the trichrome stain, if the Histoclear contains water, the finished slides will: -
answersnot be clear and will appear cloudy or milky
If fecal specimens are to be preserved for the preparation of permanent slides, what
would be the preservative of choice? - answersPVA (Polyvinyl Alcohol)
Which specimen is the LEAST likely to provide recovery of Trichomonas vaginalis? -
answersfeces
In what suspected condition should a wet prep using a warm slide be examined? -
answersAmoebic meningoencephalitis
An unpreserved fecal specimen has been accidentally left at room temperature in the
laboratory overnight. Upon examination the next day, you find many motile "larvae"
which measure about 250 and have short buccal capsules and prominent genital
primordium, but no ova are found. Identification of this organism is: -
answersStrongyloides stercoralis, rhabditiform larva
The use of the trichrome stained smear in parasitology is advantageous in that it best
demonstrates the details of the _________ stage which may not be seen as easily in
other microscopic preparations - answerstrophozoite
, Which of the following animals acts as a reservoir of infection of Balantidium coli? -
answerspigs
A cyst of Iodamoeba butschlii would typically show: - answersa glycogen mass
Bloody, diarrheic stools would most likely contain which of the following parasites? -
answersEntamoeba histolytica
The most characteristic feature of Endolimax nana it its: - answersblot-like nucleus and
clear cytoplasm
Organisms that should be considered in a waterborne outbreak of diarrheal disease
include: - answersGiardia lamblia and Cryptosporidium parvum
Which of the following is the BEST technique to identify Dientamoeba fragilis in stool? -
answersTrichrome stained smear
Eye infections with Acanthamoeba spp. have most commonly been traced to: -
answersuse of contaminated lens cleaning solutions
A host in which a parasite does not reach its sexual maturity and reproduction is a/an -
answersIntermediate host
Macroscopic examination of unpreserved, fresh stool specimens involves briefly looking
for: - answersmucus, blood, adult worms
Permanent stained smears CANNOT be made from: - answersformalin preserved
specimens
A patient presented with the following symptoms: mild gastrointestinal complaints,
vitamin A deficiency, and steatorrheal (fat in stool) stool specimens. Five stool
specimens were submitted within two weeks. All O and P exams were reported
negative. Select the next most appropriate step: - answersrequest a duodenal aspirate
for parasitic exam
Motile protozoan trophozoites initially seen in wet preps should not be reported as
positively identified until they are similarly viewed on permanently stained smear -
answersTrue
Blastocystis hominis is: - answersa protozoan that has a large, fluid filled vacuole
surrounded by one to several nuclei
Blastocystis hominis is a: - answersprotozoan
Schizogony is: - answersasexual reproduction by multiple fission
The peripheral chromatin pattern of the nucleus of Entamoeba histolytica is: -
answersevenly distributed
Which tissue-invading protozoan causes severe destruction of CNS tissue and has both
amebic and flagellated morphological forms at some point in its life cycle? -
answersNaegleria fowleri
Cysts of Entamoeba histolytica have: - answersone to four nuclei
The largest protozoan known to parasitize man is: - answersBalantidium coli
In the urban setting, Cryptosporidium is usually found in patients with: - answersAIDS
Sporogony is: - answerssexual reproduction
In the trichrome stain, if the Histoclear contains water, the finished slides will: -
answersnot be clear and will appear cloudy or milky
If fecal specimens are to be preserved for the preparation of permanent slides, what
would be the preservative of choice? - answersPVA (Polyvinyl Alcohol)
Which specimen is the LEAST likely to provide recovery of Trichomonas vaginalis? -
answersfeces
In what suspected condition should a wet prep using a warm slide be examined? -
answersAmoebic meningoencephalitis
An unpreserved fecal specimen has been accidentally left at room temperature in the
laboratory overnight. Upon examination the next day, you find many motile "larvae"
which measure about 250 and have short buccal capsules and prominent genital
primordium, but no ova are found. Identification of this organism is: -
answersStrongyloides stercoralis, rhabditiform larva
The use of the trichrome stained smear in parasitology is advantageous in that it best
demonstrates the details of the _________ stage which may not be seen as easily in
other microscopic preparations - answerstrophozoite
, Which of the following animals acts as a reservoir of infection of Balantidium coli? -
answerspigs
A cyst of Iodamoeba butschlii would typically show: - answersa glycogen mass
Bloody, diarrheic stools would most likely contain which of the following parasites? -
answersEntamoeba histolytica
The most characteristic feature of Endolimax nana it its: - answersblot-like nucleus and
clear cytoplasm
Organisms that should be considered in a waterborne outbreak of diarrheal disease
include: - answersGiardia lamblia and Cryptosporidium parvum
Which of the following is the BEST technique to identify Dientamoeba fragilis in stool? -
answersTrichrome stained smear
Eye infections with Acanthamoeba spp. have most commonly been traced to: -
answersuse of contaminated lens cleaning solutions
A host in which a parasite does not reach its sexual maturity and reproduction is a/an -
answersIntermediate host
Macroscopic examination of unpreserved, fresh stool specimens involves briefly looking
for: - answersmucus, blood, adult worms
Permanent stained smears CANNOT be made from: - answersformalin preserved
specimens
A patient presented with the following symptoms: mild gastrointestinal complaints,
vitamin A deficiency, and steatorrheal (fat in stool) stool specimens. Five stool
specimens were submitted within two weeks. All O and P exams were reported
negative. Select the next most appropriate step: - answersrequest a duodenal aspirate
for parasitic exam
Motile protozoan trophozoites initially seen in wet preps should not be reported as
positively identified until they are similarly viewed on permanently stained smear -
answersTrue
Blastocystis hominis is: - answersa protozoan that has a large, fluid filled vacuole
surrounded by one to several nuclei
Blastocystis hominis is a: - answersprotozoan
Schizogony is: - answersasexual reproduction by multiple fission
