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.   pandemic
C.   sporadic
D.   endemic
Question #2
A disease vector is a(n) ____________________ .
A.   surface that it is found on
B.   organism that transmits a disease
C.   environmental condition associated with a disease
D.   symptom of a disease
E.   more than one of the above is correct
Question #3
In terms of symbiotic relationships with the host, pathogenic microorganisms are generally
A.   normal microbiota.
B.   parasites.
C.   mutuals.
D.   commensuals.
Question #4
Microbes that only cause disease when the host has been injured or is immunocompromised are called:
A.   opportunistic pathogens.
B.   parasites.
C.   commensualistic pathogens.
D.   mutualistic pathogens.
Question #5
Which of the following are considered attachment factors?
A.   exotoxins
B.   hyaluronidase
C.   adhesins (ligands)
D.   endotoxins
Question #6
The __________ period is that phase where general, vague symptoms begin to appear; when a person realizes that they are becoming ill.
A.   incubation
B.   prodromal
C.   decline
D.   acme (critical)
Question #7
In epidemiological terms, __________ is the total number of existing cases of a disease.
A.   incidence
B.   morbidity
C.   prevalence
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.   Vicarious immunity
B.   Threshold immunity
C.   Resistance effect
D.   Herd immunity
Question #9
Which of the following factors contribute to the spread of microorganisms and their diseases?
A.   All of these
B.   Increased global travel
C.   Global climate change
D.   Habitat destruction
Question #10
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 who die from the infection
C.   The number of people living with the infection
D.   The number of contaminating cells required to kill 50% of those infected

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