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.   commensualistic pathogens.
B.   opportunistic pathogens.
C.   parasites.
D.   mutualistic pathogens.
Question #2
Which of the following are considered attachment factors?
A.   endotoxins
B.   exotoxins
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.   sporadic
B.   endemic
C.   epidemic
D.   pandemic
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.   Herd immunity
B.   Threshold immunity
C.   Vicarious immunity
D.   Resistance effect
Question #5
The lethal death/50 (LD50) is a value that refers to:
A.   The number of people who die from the infection
B.   The number of people living with the infection
C.   The number of contaminating cells required to make 50% of those infected sick.
D.   The number of contaminating cells required to kill 50% of those infected
Question #6
In epidemiological terms, __________ is the total number of existing cases of a disease.
A.   mortality
B.   incidence
C.   prevalence
D.   morbidity
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.   incubation
C.   acme (critical)
D.   decline
Question #8
A disease vector is a(n) ____________________ .
A.   surface that it is found on
B.   organism that transmits a disease
C.   symptom of a disease
D.   environmental condition associated with a disease
E.   more than one of the above is correct
Question #9
Which of the following factors contribute to the spread of microorganisms and their diseases?
A.   Global climate change, habitat destruction, and iIncreased global travel
B.   Habitat destruction and increased global travel
C.   Global climate change
D.   Habitat destruction
Question #10
In terms of symbiotic relationships with the host, pathogenic microorganisms are generally
A.   mutuals.
B.   commensuals.
C.   normal microbiota.
D.   parasites.

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