[Elizabeth_Zeibig]_Clinical_Parasitology__A_Practi(z-lib.org)

CHAPTER 8 The Nematodes
189
A. Identify and/or label the designated
characteristic structure(s).
B. State the purpose of designated
characteristic structure(s).
C. Identify the organism by scientific name,
common name, and morphologic form.
D. State the common name for associated
conditions or diseases, if applicable.
8-11. Analyze case studies that include pertinent
patient information and laboratory data
and do the following:
A. Identify each responsible nematode
organism by scientific name, common
name, and morphologic form.
B. Identify the associated diseases and
conditions associated with the
responsible parasite
C. Construct a life cycle associated with
each nematode parasite present that
includes corresponding epidemiology,
route of transmission, infective stage,
and diagnostic stage.
D. Propose each of the following related to
stopping and preventing nematode
infections:
1. Treatment options
2. Prevention and control plan
E. Recognize sources of error, including
but not limited to those involved in
specimen collection, processing, and
testing and propose solutions to remedy
them.
F. Interpret laboratory data, determine
specific follow-up tests to be done, and
predict the results of those identified
tests.
8-12. Identify, compare, and contrast the
similarities and differences among the
parasites discussed in this and other
chapters in this text.
8-13. Describe standard and alternative
laboratory diagnostic approaches as
appropriate for the recovery of nematodes
in clinical specimens.
8-14. Given prepared laboratory specimens
and with the assistance of this manual,
the learner will be able to do the
following:
A. Differentiate nematode organisms from
artifacts.
B. Differentiate the nematode
organisms from each other and from
the other appropriate categories of
parasites.
C. Correctly identify each nematode
parasite by scientific, common name,
and morphologic form based on its key
characteristic structure(s).
CASE STUDY 8-1
UNDER THE MICROSCOPE
Maria, a 5-year-old girl, presented to a local clinic complaining
of diarrhea and gastrointestinal pain and bleeding.
Patient history revealed that Maria recently emigrated to
the United States from Puerto Rico. The physician on duty
ordered a series of stool samples for O&P. Barrel-shaped
structures, as noted below, that appeared to have plugs at
each end were seen on the direct wet preps, concentrated
wet preps after performing a zinc sulfate flotation method,
and permanent stains.
Questions and Issues for Consideration
1. What is the scientific name and morphologic form of
the parasite present in Maria’s samples? (Objective
8-11A)
2. What is the common name for this parasite? (Objective
8-11 A)
3. How did Maria contract this parasite? (Objective 8-11C)
4. Which disease state is associated with this parasite?
(Objective 8-11B)
5. Which morphologic form of this parasite may be visible
on microscopic examination of the intestinal mucosa of
this patient? (Objective 8-11F)