Parasitology Exam 1 Questions With
Correct Answers
Cyclospora cayetanensis cannot be transmitted directly from person to
| | | | | | | | |
person because they: - ANSWER✔✔✔-must have a period of
| | | | | | | | |
maturation before they are infective.
| | | |
Serological tests for antibody to Entamoeba histolytica are clinically
| | | | | | | | |
relevant in which of the following situations? - ANSWER✔✔✔-an
| | | | | | | | |
individual with GI problems, blood in the stool, and negative ova and
| | | | | | | | | | | |
parasite examinations
|
The IMAGE of this protozoan trophozoite (single bullseye nucleus, some
| | | | | | | | | |
vacuoles) measures 21 μm and is identified as: - ANSWER✔✔✔-
| | | | | | | | |
Entamoeba coli |
Cysts of Entamoeba histolytica have this many nuclei: - ANSWER✔✔✔-
| | | | | | | | |
1-4
A reliable and relatively easy method to obtain duodenal contents for
| | | | | | | | | | |
parasitic examination is: - ANSWER✔✔✔-using the Entero-test
| | | | | | |
procedure
,Laboratory diagnosis of Naegleria infection is made by examining: -
| | | | | | | | | |
ANSWER✔✔✔-spinal fluid |
A host in which a parasite reaches sexual maturity and reproduction is
| | | | | | | | | | | |
a/an: - ANSWER✔✔✔-definitive host
| | |
If fecal specimens are to be preserved for the preparation of permanent
| | | | | | | | | | | |
slides, what would be the preservative of choice? - ANSWER✔✔✔-PVA
| | | | | | | | | |
(Polyvinyl Alcohol) |
Charcot-Leyden crystals in human clinical stool specimens are | | | | | | | |
associated with the breakdown of: - ANSWER✔✔✔-eosinophils
| | | | | |
An 85-year-old woman was admitted to the hospital with abdominal
| | | | | | | | | |
cramps and diarrhea of approximately one week's duration. She
| | | | | | | | |
appeared cahectic and severely dehydrated and gave a history of eating
| | | | | | | | | | |
poorly for several months prior to the onset of the above symptoms.
| | | | | | | | | | | |
The direct wet prep of her fecal specimen revealed an oval ciliated
| | | | | | | | | | | |
trophozoite measuring approximately 90 microns and containing a
| | | | | | | |
funnel shaped cytostome and a kidney-shaped nucleus. Other inclusions
| | | | | | | |
were not visible. This organism is identified as: - ANSWER✔✔✔-
| | | | | | | | | |
Balantidium coli |
The infective form of Cryptosporidium is the: - ANSWER✔✔✔-oocyst
| | | | | | | |
, When preparing permanent stained slides, you will find that smears,
| | | | | | | | | |
which are too thick, do not stain well, while those that are too thin -
| | | | | | | | | | | | | | |
ANSWER✔✔✔-de-stain too rapidly | |
Which specimen is the LEAST likely to provide recovery of Trichomonas
| | | | | | | | | | |
vaginalis?
urine
urethral discharge |
vaginal discharge |
feces - ANSWER✔✔✔-feces
| |
The IMAGE of this protozoan (two bullseye nuclei, longitudinal fibrils,
| | | | | | | | | |
teardrop shape) has been implicated in waterborne diarrheal disease
| | | | | | | | |
and is identified as: - ANSWER✔✔✔-Giardia lamblia
| | | | | |
The IMAGE of this immature protozoan cyst (round, red, 1 nucleus with
| | | | | | | | | | | |
somewhat eccentric karyosome and peripheral chromatin) measures 17
| | | | | | | |
μm and is identified as: - ANSWER✔✔✔-Entamoeba histolytica
| | | | | | |
When an experienced technologist was examining a formalin-ethyl
| | | | | | | |
acetate concentration sediment, a small number of protozoan cysts
| | | | | | | | |
were seen and tentatively identified as Entamoeba coli. However, when
| | | | | | | | | |
the trichrome stained smear was examined, these organisms were not
| | | | | | | | | |
Correct Answers
Cyclospora cayetanensis cannot be transmitted directly from person to
| | | | | | | | |
person because they: - ANSWER✔✔✔-must have a period of
| | | | | | | | |
maturation before they are infective.
| | | |
Serological tests for antibody to Entamoeba histolytica are clinically
| | | | | | | | |
relevant in which of the following situations? - ANSWER✔✔✔-an
| | | | | | | | |
individual with GI problems, blood in the stool, and negative ova and
| | | | | | | | | | | |
parasite examinations
|
The IMAGE of this protozoan trophozoite (single bullseye nucleus, some
| | | | | | | | | |
vacuoles) measures 21 μm and is identified as: - ANSWER✔✔✔-
| | | | | | | | |
Entamoeba coli |
Cysts of Entamoeba histolytica have this many nuclei: - ANSWER✔✔✔-
| | | | | | | | |
1-4
A reliable and relatively easy method to obtain duodenal contents for
| | | | | | | | | | |
parasitic examination is: - ANSWER✔✔✔-using the Entero-test
| | | | | | |
procedure
,Laboratory diagnosis of Naegleria infection is made by examining: -
| | | | | | | | | |
ANSWER✔✔✔-spinal fluid |
A host in which a parasite reaches sexual maturity and reproduction is
| | | | | | | | | | | |
a/an: - ANSWER✔✔✔-definitive host
| | |
If fecal specimens are to be preserved for the preparation of permanent
| | | | | | | | | | | |
slides, what would be the preservative of choice? - ANSWER✔✔✔-PVA
| | | | | | | | | |
(Polyvinyl Alcohol) |
Charcot-Leyden crystals in human clinical stool specimens are | | | | | | | |
associated with the breakdown of: - ANSWER✔✔✔-eosinophils
| | | | | |
An 85-year-old woman was admitted to the hospital with abdominal
| | | | | | | | | |
cramps and diarrhea of approximately one week's duration. She
| | | | | | | | |
appeared cahectic and severely dehydrated and gave a history of eating
| | | | | | | | | | |
poorly for several months prior to the onset of the above symptoms.
| | | | | | | | | | | |
The direct wet prep of her fecal specimen revealed an oval ciliated
| | | | | | | | | | | |
trophozoite measuring approximately 90 microns and containing a
| | | | | | | |
funnel shaped cytostome and a kidney-shaped nucleus. Other inclusions
| | | | | | | |
were not visible. This organism is identified as: - ANSWER✔✔✔-
| | | | | | | | | |
Balantidium coli |
The infective form of Cryptosporidium is the: - ANSWER✔✔✔-oocyst
| | | | | | | |
, When preparing permanent stained slides, you will find that smears,
| | | | | | | | | |
which are too thick, do not stain well, while those that are too thin -
| | | | | | | | | | | | | | |
ANSWER✔✔✔-de-stain too rapidly | |
Which specimen is the LEAST likely to provide recovery of Trichomonas
| | | | | | | | | | |
vaginalis?
urine
urethral discharge |
vaginal discharge |
feces - ANSWER✔✔✔-feces
| |
The IMAGE of this protozoan (two bullseye nuclei, longitudinal fibrils,
| | | | | | | | | |
teardrop shape) has been implicated in waterborne diarrheal disease
| | | | | | | | |
and is identified as: - ANSWER✔✔✔-Giardia lamblia
| | | | | |
The IMAGE of this immature protozoan cyst (round, red, 1 nucleus with
| | | | | | | | | | | |
somewhat eccentric karyosome and peripheral chromatin) measures 17
| | | | | | | |
μm and is identified as: - ANSWER✔✔✔-Entamoeba histolytica
| | | | | | |
When an experienced technologist was examining a formalin-ethyl
| | | | | | | |
acetate concentration sediment, a small number of protozoan cysts
| | | | | | | | |
were seen and tentatively identified as Entamoeba coli. However, when
| | | | | | | | | |
the trichrome stained smear was examined, these organisms were not
| | | | | | | | | |
