The Flagellates Quick Quiz Flashcards
All flagellate life cycles possess trophozoite and cyst morphologic forms.
A. True
B. False
B. False
This flagellate morphologic structure is often not visible under microscopic examination.
A. Undulating membrane
B. Pseudopods
C. Flagella
D. Axostyle
C. Flagella
The presence of nonpathogenic flagellates is important because it suggests that:
A. The patient will develop clinical signs and symptoms.
B. Onlycystformswillberecoveredincorresponding patient samples.
C. The parasites will invade multiple organ systems in the body.
D. Contaminated food or drink was consumed by the patient.
D. Contaminated food or drink was consumed by the patient.
The proposed function(s) of the median bodies seen in G. intestinalis is (are) which of the following?
A. Support
B. Energy
C. Metabolism
D. All of the above
D. All of the above
Which specimen type and collection regimen would be most appropriate for the diagnosis of G. intestinalis?
A. One stool sample
B. Two stool samples
C. Multiple stool samples collected on subsequent days
D. One stool sample and one blood sample
C. Multiple stool samples collected on subsequent days
G. intestinalis trophozoites attach to the mucosa of the duodenum and feed with the assistance of this morphologic structure.
A. Sucking disk
B. Axostyle
C. Axoneme
D. Nucleus
A. Sucking disk
Individuals become infected with G. intestinalis by which of the following?
A. Swimming in contaminated water
B. Ingesting contaminated food or drink
C. Inhalation of infective cysts
D. Walking barefoot on contaminated soil
B. Ingesting contaminated food or drink
Individuals at risk for contracting G. intestinalis when camping and hiking are encouraged to take which of these steps to prevent infection?
A. Treat potentially infected water with a double strength saturated saline solution prior to consuming.
B. Use only bottled water for drinking, cooking & appropriate personal hygiene.
C. Avoid swimming in contaminated water.
D. Wear shoes at all times.
B. Use only bottled water for drinking, cooking & appropriate personal hygiene.
Which of the following are key morphologic charac- teristics of C. mesnili?
A. Round and four to eight nuclei
B. Oval and presence of a cytosome
C. Round and presence of an axoneme
D. Lemon-shaped and presence of a cytosome
D. Lemon-shaped and presence of a cytosome
A liquid stool is the specimen of choice for the recovery of which of these morphologic forms of C. mesnili?
A. Trophozoites only
B. Cysts only
C. Trophozoites and cysts
A. Trophozoites only
A flagellate trophozoite that could be described as 9 to 12 μm with one or two nuclei, each with four symmetrically positioned chromatin granules and vacuoles containing bacteria in the cytoplasm, would most likely be which of the following?
A. Giardia intestinalis
B. Dientamoeba fragilis
C. Chilomastix mesnilli
D. Blastocystis hominis
B. Dientamoeba fragilis
The permanent stain of choice for observing the nuclear features of D. fragilis is which of the following?
A. Trichrome
B. Iodine
C. Saline
D. Iron hematoxylin
D. Iron hematoxylin
The specimen of choice for the recovery of T. hominis is which of the following?
A. Stool
B. Urine
C. Intestinal contents
D. Gastric contents
A. Stool
Trichomonas hominis can be transmitted by which of the following?
A. Contaminated milk
B. Bite of an infected mosquito
C. Ingestion of an embryonated ovum
D. Ingestion of undercooked meat
A. Contaminated milk
When E. hominis cysts contain more than one nuclei, where do they tend to be positioned within the cytoplasm?
A. Center
B. Around the periphery of the organism
C. At opposite ends of the cell
D. Throughout the organism
C. At opposite ends of the cell
