MISCELLANEOUS PROTOZOA Quick Quiz

Question 1

What makes each member of the the parasites discussed in this chapter similar?

A. Presence of cilia
B. They are all unicellular.
C. All are intestinal protozoa.
D. Presence of tachyzoites

Answer 1

C. All are intestinal protozoa.

Question 2

Which structure is always visible in then stained cyst and troph of Balantidium coli?

A. Macronucleus
B. Micronucleus
C. Cilia
D. Ingested bacteria

Answer 2

A. Macronucleus

Question 3

The life cycle of Balantidium coli and clinical symp- toms are similar to that of which of the following?

A. Isospora belli
B. Entamoeba histolytica
C. Crytosporidium parvum
D. Giardia intestinalis

Answer 3

B. Entamoeba histolytica

Question 4

Which two factors play an important role in the prognosis of a Balantidum coli infection?

A. How infection occurred and duration of the infection
B. Presence of coinfection and duration of the infection
C. Severity of infection and response to treatment
D. Immunocompetent status and severity of
infection

Answer 4

C. Severity of infection and response to treatment

Question 5

All the following are highly recommended when processing samples for the identification of Isospora belli to ensure identification except:

A. Iodine wet prep
B. Decreased microscope light level
C. Modified acid-fast stain
D. Saline wet prep

Answer 5

D. Saline wet prep

Question 6

Which stage of reproduction is considered capable of initiating another infection of Isospora belli?

A. Sporozoites
B. Immature oocysts
C. Merozoites
D. Mature oocysts

Answer 6

D. Mature oocysts

Question 7

Which of the following patients would be more likely to contract an infection with Isospora belli?

A. HIV-positive man
B. Female leukemia patient
C. Pig farmer
D. Nursing home resident

Answer 7

A. HIV-positive man

Question 8

Which genus of parasite is most similar to Sarcocystis based on morphologic similarities?

A. Isospora
B. Blastocystis
C. Entamoeba
D. Toxoplasma

Answer 8

A. Isospora

Question 9

How do humans become infected with Sarcocystis?

A. Ingestion of uncooked or undercooked beef or pork
B. Inhalation of oocysts
C. Ingestion of animal fecal contaminated food
D. More than one of the above: ________________ (specify)

Answer 9

A. Ingestion of uncooked or undercooked beef or pork

Question 10

In addition to oocysts, these Sarcocystis morphologic forms may be seen in human samples:

A. Packets of eggs
B. Single or double sporocysts
C. Clusters of cysts
D. Groups of sporoblasts

Answer 10

B. Single or double sporocysts

Question 11

Which stage of reproduction is considered capable of autoinfection of Cryptosporidium?

A. Intact oocysts
B. Merozoites
C. Gametocytes
D. Sporozoites

Answer 11

A. Intact oocysts

Question 12

The permanent stain of choice for the recovery of Cryptosporidium parvum is:

A. Iron hematoxylin
B. Modifed acid-fast
C. Gram
D. Trichrome

Answer 12

B. Modifed acid-fast

Question 13

All the following are recommended to prevent and control an outbreak of Cryptosporidium except:

A. Proper treatment of water supplies
B. Sterlize equipment using high heat.
C. Sterilize equipment using full-strength bleach.
D. Sterilize equipment using 5% to 10% household ammonia.

Answer 13

B. Sterlize equipment using high heat.

Question 14

Which is the best screening method for the identification of Blastocystis hominis?

A. Saline wet prep
B. Modified acid-fast stain
C. Iodine wet prep
D. Iron hematoxylin stain

Answer 14

C. Iodine wet prep

Question 15

Blastocystis hominis is always considered as being responsible for clinical symptoms when present in human samples.

A. True
B. False

Answer 15

B. False

Question 16

Which of the following measures that when taken can prevent the spread of Blastocystis hominis?
A. Avoid swimming in potentially contaminated
water.
B. Proper sewage treatment
C. Use insect repellent.
D. Avoid unprotected sex.

Answer 16

B. Proper sewage treatment

Question 17

Diagnosis of Cyclospora can be accomplished by all the following except:

A. Concentration with formalin fixative
B. Flotation methods
C. Modified acid-fast stain
D. Addition of 5% potassium dichromate

Answer 17

A. Concentration with formalin fixative

Question 18

The clinical symptoms associated with Cyclospora infections in children are similar to those seen in cases of infection by which of the following?

A. Naegleria
B. Cryptosporidium
C. Leishmania
D. Balantidium

Answer 18

B. Cryptosporidium

Question 19

The most important Cyclospora prevention step that can be taken is:

A. Proper water treatment
B. Wearing shoes when walking in sandy soil
C. Insecticide treatment of mosquito breeding areas
D. Thoroughly cooking beef and pork.

Answer 19

A. Proper water treatment

Question 20

How do Microsporidia spores differ from other protozoan spores?

A. Double outer wall
B. Extruding polar filaments
C. Cilia
D. Pseudopods

Answer 20

B. Extruding polar filaments

Question 21

Of the following, which laboratory technique is required for species identification of Microsporidia?

A. Giemsa-stained biopsy material
B. Electron microscopy
C. Fecal concentration
D. PAS stain

Answer 21

B. Electron microscopy

Question 22

The life cycle of Microsporidia is a complex process in which both the infective and diagnostic stages are spores.

A. True
B. False

Answer 22

A. True

Question 23

All the following are morphologic forms in the life cycle of Toxoplasma gondii except:

A. Oocysts
B. Tachyzoites
C. Bradyzoites
D. Sporozoites

Answer 23

D. Sporozoites

Question 24

Human infection of Toxoplasma is initiated in all the following ways except:

A. Accidental ingestion of rodent feces
B. Ingestion of contaminated undercooked meat from cattle, pigs, or sheep
C. Transplacental infection
D. Transfusion of contaminated blood

Answer 24

A. Accidental ingestion of rodent feces

Question 25

In which geographic area would you be likely to find Toxoplasma gondii?

A. Tropics
B. Africa
C. United States
D. All of the above

Answer 25

D. All of the above

Question 26

What is the preferred method of diagnosis for Pneu- mocystis jiroveci?

A. Histologic stain
B. Giemsa stain
C. Iron hematoxylin stain
D. Iodine wet prep

Answer 26

A. Histologic stain

Question 27

Which of the following groups of individuals is con- sidered at highest risk for contracting Pneumocystis jiroveci?

A. Veterans
B. Active military personnel
C. Immunosuppressed individuals
D. Newborns

Answer 27

C. Immunosuppressed individuals

Question 28

Pneumocystis jiroveci is believed to be spread via which of the following?

A. Contaminated water
B. Mosquito bite
C. Person-to-person
D. Hand-to-mouth

Answer 28

C. Person-to-person

Question 29

Which of the following sporozoan oocysts do not contain sporocysts?

A. Isospora
B. Cryptosporidium
C. Sarcocystis
D. Blastocystis

Answer 29

B. Cryptosporidium

Question 30

The scientific name for sexual reproduc-
tion that occurs in select miscellaneous protozoa is:

A. Sporogony
B. Erthyrocytic cycle
C. Gametogony
D. Binary fission

Answer 30

C. Gametogony

Question 31

This parasite is recognizable because of
the presence of two nuclei. Name that parasite!

A. Isospora belli
B. Balantidium coli
C. Sarcocystis spp.
D. Pneumocystis jiroveci

Answer 31

B. Balantidium coli

Question 32

The presence of cilia sets this parasite
apart from the other members of the mis- cellaneous protozoa.

A. Cryptosporidium
B. Microsporidium
C. Cyclospora
D. Balatidium

Answer 32

D. Balatidium

Question 33

This member of the other protozoa group
is typically identified via serologic test methods.

A. Blastocystis
B. Toxoplasma
C. Sarcocystis
D. Pneumocystis

Answer 33

B. Toxoplasma