Bio 2010 - Microbiology » Fall 2021 » Chapter 14 Quiz

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

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