Bio 2010 - Microbiology » Summer 2021 » Chapter 14 Quiz (A)

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Question #1
Microbes that only cause disease when the host has been injured or is immunocompromised are called:
A.   opportunistic pathogens.
B.   commensualistic pathogens.
C.   mutualistic pathogens.
D.   parasites.
Question #2
Which of the following are considered attachment factors?
A.   exotoxins
B.   endotoxins
C.   hyaluronidase
D.   adhesins (ligands)
Question #3
Diseases that are always present in a community, usually at a low, more or less constant, frequency are classified as having an ____________ pattern.
A.   endemic
B.   pandemic
C.   epidemic
D.   sporadic
Question #4
The resistance of a population to infection and pathogen spread due to the immunity of a large presence of the population is known as:
A.   Resistance effect
B.   Herd immunity
C.   Threshold immunity
D.   Vicarious immunity
Question #5
The lethal death/50 (LD50) is a value that refers to:
A.   The number of people living with the infection
B.   The number of contaminating cells required to make 50% of those infected sick.
C.   The number of contaminating cells required to kill 50% of those infected
D.   The number of people who die from the infection
Question #6
In epidemiological terms, __________ is the total number of existing cases of a disease.
A.   prevalence
B.   morbidity
C.   incidence
D.   mortality
Question #7
The __________ period is that phase where general, vague symptoms begin to appear; when a person realizes that they are becoming ill.
A.   prodromal
B.   acme (critical)
C.   decline
D.   incubation
Question #8
A disease vector is a(n) ____________________ .
A.   organism that transmits a disease
B.   more than one of the above is correct
C.   surface that it is found on
D.   symptom of a disease
E.   environmental condition associated with a disease
Question #9
Which of the following factors contribute to the spread of microorganisms and their diseases?
A.   Habitat destruction
B.   Global climate change, habitat destruction, and iIncreased global travel
C.   Global climate change
D.   Habitat destruction and increased global travel
Question #10
In terms of symbiotic relationships with the host, pathogenic microorganisms are generally
A.   normal microbiota.
B.   parasites.
C.   mutuals.
D.   commensuals.

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