PT2 Flashcards
LEMON-shaped cyst
Chilomastix mesnili
Trophozoite has a ventrally located sucking disc
Giardia intestinalis
Transmitted by helminth ova
Dientamoeba fragilis
Specimen of choice is a MOUTH SCRAPING
Trichomonas tenax
Specimen of choice can be a URETHRAL swab
Trichomonas vagilis
Fibrils form a characteristic BIRD’S BEAK
Retortamonas intestinalis
All cases of T.vaginalis infection result in symptomatic vaginitis in women and urethritis in men
False
All flagellate life cycle possess trophozoite and cyst morphologic forms
False
This flagellate morphologic structure is often not visible
under microscopic examination.
Flagella
The presence of nonpathogenic flagellates is important because it suggests that:
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?
Support, Energy and Metabolism
Which specimen type and collection regimen would
be most appropriate for the diagnosis of G. intestinalis?
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.
Sucking disk
Individuals become infected with G. intestinalis by
which of the following?
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?
Use only bottled water for drinking, cooking &
appropriate personal hygiene.
A liquid stool is the specimen of choice for the recovery of which of these morphologic forms of C.
mesnili?
Trophozoites only
Which of the following are key morphologic charac-
teristics of C. mesnili?
Lemon-shaped and presence of a cytosome
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?
Dientamoeba fragilis
The permanent stain of choice for observing the
nuclear features of D. fragilis is which of the following?
Iron hematoxylin
The specimen of choice for the recovery of T. hominis
is which of the following?
Stool
Trichomonas hominis can be transmitted by which of
the following?
Contaminated milk
When E. hominis cysts contain more than one nuclei,where do they tend to be positioned within the cytoplasm?
At opposite ends of the cell
Treatment is always indicated for patients when
E. hominis is present on parasite examination.
False
The traditional technique and specimen of choice for
identifying Retortamonas intestinalis is which of the
following?
Permanently stained stool
Individuals contract R. intestinalis by which of the
following?
Ingesting infective cysts in contaminated food or
drink
This prominent structure found in T. vaginalis tropho-
zoites that often extends beyond the body provides
the parasite with support.
Axostyle
The cyst morphologic form is not known to exist in
the life cycle of T. vaginalis.
True
T. vaginalis may be recovered in which of the following specimen types?
Urethral discharge
Infant infections with T. vaginalis tend to affect which of the following of these body areas?
Respiratory and eye
