[Elizabeth_Zeibig]_Clinical_Parasitology__A_Practi(z-lib.org)

A P P E N D I X
D
Answers to Test Your Knowledge
(Review Questions)
CHAPTER 1
1-1. A. 6
B. 4
C. 1
D. 9
E. 8
F. 3
G. 10
H. 5
I. 2
J. 7
1-2. Parasites are endemic in underdeveloped
tropical and subtropical countries and
areas around the world. Examples of
these places include Guatemala, Myanmar
(Burma), and Africa. Factors that contribute
to their presence include the following:
(1) increased population density;
(2) poor sanitation; (3) marginal water
sources; (4) poor public health practices;
(5) environmental changes affecting
vector breeding areas; and (6) habits and
customs of the inhabitants.
1-3. The increasing prevalence of world travel
accounts for the increased incidence of
parasitic infections in nonendemic areas
of the world.
1-4. Primary modes of parasitic transmission
include the following: (1) ingestion of contaminated
food or drink; (2) hand-tomouth
transfer; (3) insect bite; (4) entry via
drilling through the skin; (5) unprotected
sexual relations; (6) mouth-to-mouth
contact; (7) droplet contamination; and
(8) eye contact with infected swimming
water.
1-5. A. Types of parasites: Endoparasites,
ectoparasites, obligatory parasites
and facultative parasites.
B. Types of host: Accidental or incidental
hosts, definitive hosts, intermediate
hosts, reservoir hosts, transport
hosts, and vectors.
C. Types of parasite-host relationships:
Symbiosis, commensalisms, mutualism,
and parasitism; in some cases the
association may become pathogenic.
Optional activity: Any reasonable informational
flyer is considered acceptable.
Follow your instructor’s guidelines and
requirements for completion; creativity is
encouraged. Keep the audience in mind
and use wording that the audience will
understand.
1-6. Parasites have the ability to alter their
makeup so that the host will not recognize
its presence as being foreign will
therefore not mount an immune response
against it. This in turn often creates an
environment that is conducive for parasite
establishment.
1-7. The two common phases of a parasitic
life cycle are the following: (1) occurs
when the parasite is in or on the human
body and: (2) occurs independently from
the human body.
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