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

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

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