Microbiology: An Evolving Science (Fourth Edition)
4th Edition
ISBN: 9780393615098
Author: John W. Foster, Joan L. Slonczewski
Publisher: W. W. Norton & Company
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Chapter 25.4, Problem 2TQ
Summary Introduction
To review :
The secretion of exotoxin from a pathogen.
Introduction:
Exotoxin refers to the protein toxins secreted by the microbes after attachment to the host cell. These exotoxins kill the host cells and utilize the nutrients as the host cell lyses. Microbial toxins can be of various types based on their mechanism of action.
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Normal microbiota provide protection from infection in each of the following ways EXCEPT:
Question 3 options:
A)
they produce antibacterial chemicals.
B)
they compete with pathogens for nutrients.
C)
they make the chemical environment unsuitable for nonresident bacteria.
D)
they produce lysozyme.
Which one of the following is not
correct? *
a) Biocompatibility is the ability of a
material to perform within an appropriate
host response.
b) Bioactivity is the characteristic that
not allows the material to form a bond
with living tissue
c) Biodegradability is the breakdown of
O the implant due to chemical or cellular
interaction.
O d) all of above
Refer to the figures above:
41) Which figure displays the rate of bacterial growth in a living animal?
a) Figure A
b) Figure C
C) Both
d) Neither
e) Cannot be determined
42) Which figure tests the effects of one or more lymphocytes?
a) Figure A
b) Figure C
c) Both
d) Neither
e) Cannot be determined
43) Which figure demonstrates that addition of effector PCs leads to bacterial death?
a) Figure A
b) Figure C
C) Both
d) Neither
e) Cannot be determined
44) Based on these figures, Listeria infection control is most directly due to which effector cell:
a) CTL
b) T helper
c) Macrophage
d) Basophil
d) None of the above
Chapter 25 Solutions
Microbiology: An Evolving Science (Fourth Edition)
Ch. 25.1 - Prob. 1TQCh. 25.4 - Prob. 1TQCh. 25.4 - Prob. 2TQCh. 25.4 - Prob. 3TQCh. 25.4 - Prob. 4TQCh. 25.5 - Prob. 1TQCh. 25.6 - Prob. 1TQCh. 25.6 - Prob. 2TQCh. 25.6 - Prob. 3TQCh. 25.6 - Prob. 4TQ
Ch. 25.7 - Prob. 1TQCh. 25 - Prob. 1RQCh. 25 - Prob. 2RQCh. 25 - Prob. 3RQCh. 25 - Prob. 4RQCh. 25 - Prob. 5RQCh. 25 - Prob. 6RQCh. 25 - Prob. 7RQCh. 25 - Prob. 8RQCh. 25 - Prob. 9RQCh. 25 - Prob. 10RQCh. 25 - Prob. 11RQCh. 25 - Prob. 12RQCh. 25 - Prob. 13RQCh. 25 - Prob. 14RQCh. 25 - Prob. 15RQCh. 25 - Prob. 16RQCh. 25 - Prob. 17RQCh. 25 - Prob. 1TQCh. 25 - Prob. 2TQCh. 25 - Prob. 3TQCh. 25 - Prob. 4TQCh. 25 - Prob. 5TQ
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- When a child skins their knee and neosporin is applied, this reduces the chances of pathogens gaining entry to the body by A.) adhesion to receptor proteins. B.) endocytosis. C.) use of a biofilm. D.) the parenteral route.arrow_forwardGive an example of a cytolytic exotoxin and a superantigenexotoxin, as well as the bacteria that produce each.arrow_forwardMatch the PAMP to the type of pathogen it is specific to. 1) Peptidoglycan 2) Lipopolysaccharides 3) RNA 4) DNA Here is the options: a) Gram-negative bacteria b) Viruses c) Gram-positive bacteriaarrow_forward
- Why are bacteria referred to as pathogens?arrow_forwardWhat happens when a bacteria release toxin and how could we identify an endotoxin case?arrow_forwardAll of the following can be side effects of antimicrobialagents EXCEPT:(a) “Superinfections” can occur with new pathogens whendefensive capacity of normal flora is destroyed(b) Host toxicity(c) Disruption of normal microflora in host(d) Host allergic reaction(e) Host “superimmunity”arrow_forward
- Which pathogen is most likely to be treated with antibiotics?arrow_forwardPathogenic infections induce damage to the host by a variety of mechanisms. While many mechanisms are direct effects of the pathogen, some damaging mechanisms result from the immune response to the infection. Examples of damage caused by the host immune response are: a) Exotoxin production, endotoxin b) Cell-mediated inmunity, direct cytopathic effect c) Endotoxin, inmmunune complexes d) Direct cythopathic effect, endotoxin e) Cell-mediated inmunity, inmmunune complexesarrow_forwardEndotoxin is associated witha) Gram-positive bacteria.b) Gram-negative bacteria.c) the cytoplasmic membrane.d) endospores.arrow_forward
- What is the relationship between the superantigens of S. aureus and the organism’s production of toxic shock?arrow_forwardWhy must the top agar be supplemented with maltose? A) Maltose allows for binding of the phage to the E. Coli and aids in the infection process B) Maltose helps stabilize the phage within the mediaarrow_forwardWhat are the steps in a lysogenic infection?arrow_forward
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