[Elizabeth_Zeibig]_Clinical_Parasitology__A_Practi(z-lib.org)

CHAPTER 7 Miscellaneous Protozoa
185
pictured next to each other in the comparison
drawings at the end of this chapter.
TEST YOUR KNOWLEDGE!
7-1. Match the parasite (column A) with the
specimen(s) of choice (column B). (Objective
7-8)
Column A
___ A. Balantidium coli
___ B. Isospora belli
___ C. Sarcocystis
___ D. Cryptosporidium
parvum
___ E. Blastocystis
hominis
___ F. Cyclospora
cayetanensis
Column B
1. Duodenal
contents
2. Stool
3. Blood
4. Sigmoidoscopy
material
7-2. List possible invasion areas of Balantidium
coli other than the intestine. (Objective
7-7A)
7-3. The following animals or vectors are
associated with which parasite(s)? (Objective
7-5)
A. Cat
B. Pig
C. Cow
7-4. A saline wet prep is not recommended for
which two parasites? (Objective 7-8)
7-5. Lung biopsies can aid in the identification
of which parasites? (Objective 7-8)
7-6. Which of the following sporozoan oocysts
do not contain sporocysts? (Objective 7-11)
A. Isospora
B. Cryptosporidium
C. Sarcocystis
D. Blastocystis
7-7. The scientific name for sexual reproduction
that occurs in select miscellaneous
protozoa is: (Objective 7-1)
A. Sporogony
B. Erthyrocytic cycle
C. Gametogony
D. Binary fission
7-8. This parasite is recognizable because of
the presence of two nuclei. Name that
parasite! (Objective 7-9C)
A. Isospora belli
B. Balantidium coli
C. Sarcocystis spp.
D. Pneumocystis jiroveci
7-9. The presence of cilia sets this parasite
apart from the other members of the miscellaneous
protozoa. (Objective 7-11)
A. Cryptosporidium
B. Microsporidium
C. Cyclospora
D. Balatidium
7-10. This member of the other protozoa group
is typically identified via serologic test
methods. (Objective 7-8)
A. Blastocystis
B. Toxoplasma
C. Sarcocystis
D. Pneumocystis
CASE STUDY 7-2
UNDER THE MICROSCOPE
Alette, a 17-year-old Haitian woman, presented to a
women’s clinic complaining of watery and foamy bowel
movements 5 to 10 times a day. She had also experienced
abdominal cramps and a low-grade fever. The physician
ordered a stool sample for routine O&P as well as for
culture and sensitivity tests.
The culture and sensitivity tests were reported as negative
for enteric pathogens. The laboratory technician
performed a routine O&P examination, including a permanent
trichrome stain. No parasites were observed.
Two days later, a repeat O&P was ordered. The patient
was now diagnosed as HIV-positive. The repeat sample was
again examined for ova and parasites by routine laboratory
procedures. This time, the technologist noted oval forms of
the wet preps that were highly refractile and suggestive of
fungal cells, but no budding was seen. The trichrome
Continued