Micro Chapter 35

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1. The condition in the host that results from pathogenic parasitic organism growing and multiplying within or on the host is called
A. an infection.
B. an infectious disease.
C. pathogenesis.
D. all of these.

A. an infection.

2. The final outcome of most host-parasite relationships depends on
A. the number of organisms present in or on the host.
B. the virulence of the organism.
C. the host’s defenses.
D. all of the choices

D. all of the choices

3. Which of the following has no effect on the outcome of the host-parasite relationship?
A. The number of parasites on or in the host.
B. The virulence of the parasite.
C. The defenses of the host.
D. All of these have an effect on the outcome of the host-parasite relationship.

D. All of these have an effect on the outcome of the host-parasite relationship.

4. Any organism that can cause disease in the host after direct interaction is a
A. focal pathogen.
B. opportunistic pathogen.
C. primary pathogen.
D. secondary pathogen.

C. primary pathogen.

7. If a symbiont either harms or lives at the expense of another organism, the relationship is called
A. symbiosis.
B. parasitism.
C. commensalisms.
D. pathogenicity.

B. parasitism.

8. An organism other than a human that is infected with a parasitic organism that can also infect humans is called a(n) ________ host.
A. reservoir.
B. endoparasite.
C. transfer.
D. intermediate.

A. reservoir.

9. Which of the following is required of a pathogen to possess in order for it to be successful at causing infectious disease?
A. Initially be transported to the host.
B. Be able to exit the host.
C. Ability to adhere to, colonize, or invade the host.
D. Ability to damage the host.
E. All of the choices.

E. All of the choices.

10. An inanimate object that may be contaminated with a pathogen is called a
A. vector.
B. fomite.
C. zoonoses.
D. none of the choices

B. fomite.

11. Which of the following is a facultative intracellular pathogen?
A. Viruses
B. Brucella abortus
C. Rickettsia
D. All of the choices

B. Brucella abortus

16. Vector-borne transmission can be either external or internal. In external (mechanical) transmission, the pathogen is carried
A. on a fomite.
B. on the body surface of a vector.
C. within the vector.
D. all of the choices

B. on the body surface of a vector.

18. Bacteria within biofilms exchange
A. plasmids.
B. quorum-sensing molecules.
C. nutrients.
D. all of the choices

D. all of the choices

34. Listeria monocytogenes propels itself through mammalian host cells using:
A. a modified form of gliding motility.
B. host cell actin and other cytoskeletal proteins.
C. periplasmic flagella.
D. fimbriae based twitching motility.

B. host cell actin and other cytoskeletal proteins.

35. The toxic component of lipopolysaccharide is called
A. lipid A.
B. exotoxin.
C. hemolysin.
D. antigen polysaccharide.

A. lipid A.

36. The characteristics of a pathogen that determine its virulence include which of the following?
A. pathogenicity
B. invasiveness
C. infectivity
D. all of the choices

D. all of the choices

37. Pathogenicity islands are typically associated with
A. genes encoding tRNA.
B. genes encoding rRNA.
C. G+C content similar to the rest of the bacterial genome.
D. none of the choices

A. genes encoding tRNA.

38. Which of the following is not a biological effect associated with endotoxin?
A. coagulation
B. paralysis
C. fever
D. fibrinolysis

B. paralysis

39. Endotoxin is released when
A. gram negative pathogens lyse or divide.
B. cells are starved for iron.
C. cells are lysogenic for the beta phage.
D. all of the choices

A. gram negative pathogens lyse or divide.

40. Which of the following is not a characteristic of lipid A?
A. heat stable.
B. toxic in nanogram amounts.
C. weakly immunogenic.
D. neurotoxic.

D. neurotoxic.

41. Endotoxins include which of the following?
A. diphtheria toxin
B. lipopolysaccharide
C. tetanus toxin
D. botulinum toxin

B. lipopolysaccharide

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