[Elizabeth_Zeibig]_Clinical_Parasitology__A_Practi(z-lib.org)

CHAPTER 11 The Trematodes
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C. Small (12 × 30 µm), with an
operculum
D. Large (60 × 150 µm), with a large
lateral spine
11-10. Match the host for metacercariae with
the parasite. Answers can be used more
than once. (Objective 11-5)
Column A
A. Fish
B. Water plants
C. Crawfish
Column B
1. Fasciolopsis buski
2. Fasciola hepatica
3. Clonorchis sinensis
4. Paragonimus westermani
5. Metagonimus yokogawai
6. Heterophyes heterophyes
CASE STUDY 11-2
UNDER THE MICROSCOPE
Anthony, a 30-year-old Italian man, worked as an archeologist
in the Nile Valley. Anthony and his team recently made
an important historical discovery, the Providence Stone.
This stone allows a person’s mind and soul on his or her
death to be transferred into another person’s body. To celebrate
this find, the team went out to a local pub for
champagne and escargot (snails). The team members
became somewhat rowdy and insisted on ending the
evening with a dip in the Nile.
Approximately 1 month later, Anthony experienced
increased urination with spots of blood. He was also frequently
tired and complained of a slight fever. Anthony
explained his symptoms to a local physician and was asked
if he had eaten or done anything unusual lately. Embarrassed,
Anthony admitted only to an early morning swim
in the Nile. On examination, the physician ordered a complete
blood count (CBC), Chem 6 (a battery of chemistry
tests for Na + , K + , Cl − , CO 2 , glucose, and BUN-blood urea
nitrogen), and urinalysis (UA).
The samples were sent to a laboratory. The CBC revealed
eosinophilia. The Chem 6 results were normal. The UA
showed a trace of blood. Microscopic examination of the
concentrated urine showed a yellowish-brown ovoid
organism that measured approximately 115 by 50 µm.
Questions and Issues for Consideration
1. What parasite, including its morphologic form, is suspected?
(Objective 11-11A)
2. Name the disease caused by this parasite. (Objective
11-11B)
3. What is the first intermediate host associated with the
life cycle of this parasite? (Objective 11-11C)
4. What is the mode of transmission for this parasite?
(Objective 11-11C)