Bio 2010 - Microbiology » Spring 2023 » Chapter 14 Quiz

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Question #1
Diseases that are always present in a community, usually at a low, more or less constant, frequency are classified as having an ____________ pattern.
A.   epidemic
B.   sporadic
C.   endemic
D.   pandemic
Question #2
A disease vector is a(n) ____________________ .
A.   more than one of the above is correct
B.   environmental condition associated with a disease
C.   surface that it is found on
D.   organism that transmits a disease
E.   symptom of a disease
Question #3
In terms of symbiotic relationships with the host, pathogenic microorganisms are generally
A.   normal microbiota.
B.   commensuals.
C.   mutuals.
D.   parasites.
Question #4
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.
Question #5
Which of the following are considered attachment factors?
A.   exotoxins
B.   adhesins (ligands)
C.   endotoxins
D.   hyaluronidase
Question #6
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.   incubation
C.   prodromal
D.   decline
Question #7
In epidemiological terms, __________ is the total number of existing cases of a disease.
A.   morbidity
B.   prevalence
C.   incidence
D.   mortality
Question #8
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.   Threshold immunity
C.   Herd immunity
D.   Vicarious immunity
Question #9
Which of the following factors contribute to the spread of microorganisms and their diseases?
A.   All of these
B.   Habitat destruction
C.   Increased global travel
D.   Global climate change
Question #10
The lethal death/50 (LD50) is a value that refers to:
A.   The number of contaminating cells required to kill 50% of those infected
B.   The number of contaminating cells required to make 50% of those infected sick.
C.   The number of people who die from the infection
D.   The number of people living with the infection

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