PT2

Question 1

LEMON-shaped cyst

Answer 1

Chilomastix mesnili

Question 2

Trophozoite has a ventrally located sucking disc

Answer 2

Giardia intestinalis

Question 3

Transmitted by helminth ova

Answer 3

Dientamoeba fragilis

Question 4

Specimen of choice is a MOUTH SCRAPING

Answer 4

Trichomonas tenax

Question 5

Specimen of choice can be a URETHRAL swab

Answer 5

Trichomonas vagilis

Question 6

Fibrils form a characteristic BIRD’S BEAK

Answer 6

Retortamonas intestinalis

Question 7

All cases of T.vaginalis infection result in symptomatic vaginitis in women and urethritis in men

Answer 7

False

Question 8

All flagellate life cycle possess trophozoite and cyst morphologic forms

Answer 8

False

Question 9

This flagellate morphologic structure is often not visible
under microscopic examination.

Answer 9

Flagella

Question 10

The presence of nonpathogenic flagellates is important because it suggests that:

Answer 10

Contaminated food or drink was consumed by the
patient.

Question 11

The proposed function(s) of the median bodies seen
in G. intestinalis is (are) which of the following?

Answer 11

Support, Energy and Metabolism

Question 12

Which specimen type and collection regimen would
be most appropriate for the diagnosis of G. intestinalis?

Answer 12

Multiple stool samples collected on subsequent
days

Question 13

G. intestinalis trophozoites attach to the mucosa of
the duodenum and feed with the assistance of this
morphologic structure.

Answer 13

Sucking disk

Question 14

Individuals become infected with G. intestinalis by
which of the following?

Answer 14

Ingesting contaminated food or drink

Question 15

Individuals at risk for contracting G. intestinalis when camping and hiking are encouraged to take which of these steps to prevent infection?

Answer 15

Use only bottled water for drinking, cooking &
appropriate personal hygiene.

Question 16

A liquid stool is the specimen of choice for the recovery of which of these morphologic forms of C.
mesnili?

Answer 16

Trophozoites only

Question 17

Which of the following are key morphologic charac-
teristics of C. mesnili?

Answer 17

Lemon-shaped and presence of a cytosome

Question 18

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?

Answer 18

Dientamoeba fragilis

Question 19

The permanent stain of choice for observing the
nuclear features of D. fragilis is which of the following?

Answer 19

Iron hematoxylin

Question 20

The specimen of choice for the recovery of T. hominis
is which of the following?

Answer 20

Stool

Question 21

Trichomonas hominis can be transmitted by which of
the following?

Answer 21

Contaminated milk

Question 22

When E. hominis cysts contain more than one nuclei,where do they tend to be positioned within the cytoplasm?

Answer 22

At opposite ends of the cell

Question 23

Treatment is always indicated for patients when
E. hominis is present on parasite examination.

Answer 23

False

Question 24

The traditional technique and specimen of choice for
identifying Retortamonas intestinalis is which of the
following?

Answer 24

Permanently stained stool

Question 25

Individuals contract R. intestinalis by which of the following?

Answer 25

Ingesting infective cysts in contaminated food or drink

Question 26

This prominent structure found in T. vaginalis tropho- zoites that often extends beyond the body provides the parasite with support.

Answer 26

Axostyle

Question 27

The cyst morphologic form is not known to exist in the life cycle of T. vaginalis.

Answer 27

True

Question 28

T. vaginalis may be recovered in which of the following specimen types?

Answer 28

Urethral discharge

Question 29

Infant infections with T. vaginalis tend to affect which of the following of these body areas?

Answer 29

Respiratory and eye