Connect With Learnsmart Labs Online Access For Prescott's Microbiology
11th Edition
ISBN: 9781260408997
Author: Joanne Willey
Publisher: Mcgraw-hill Higher Education (us)
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Chapter 35.1, Problem 4CC
What is an obligate intracellular pathogen? How might it survive?
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All the following would be of benefit to extracellular pathogens, except
A) O the presence of a capsule
B) O ability to prevent the fusion of a phagosome and lysosome
C) O ability to prevent of opsonization
D) O ability to alter cell surface proteins via phase variation
E) O There are no exceptions; all are of benefit to extracellular pathogens.
Our environment contains masses of microorganisms, many of which reside as commensal organisms on our body’s mucosal and epithelial surfaces without causing disease. What two features distinguish a pathogenic microbe from these commensal microbes?
Pathogenic 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 complexes
Chapter 35 Solutions
Connect With Learnsmart Labs Online Access For Prescott's Microbiology
Ch. 35.1 - MICRO INQUIRY During which stages does the host...Ch. 35.1 - Define infection, infectious disease,...Ch. 35.1 - Prob. 2CCCh. 35.1 - What are some important characteristics of a...Ch. 35.1 - What is an obligate intracellular pathogen? How...Ch. 35.1 - Prob. 5CCCh. 35.1 - Prob. 6CCCh. 35.2 - Prob. 1CCCh. 35.2 - Prob. 2CCCh. 35.2 - Define droplet nuclei, vehicle, fomite, and...
Ch. 35.2 - Prob. 4CCCh. 35.2 - Prob. 5CCCh. 35.2 - Prob. 6CCCh. 35.3 - Prob. 1CCCh. 35.3 - Prob. 2CCCh. 35.3 - Prob. 3CCCh. 35.3 - Prob. 4CCCh. 35.4 - What are virulence factors?Ch. 35.4 - What are pathogenicity islands and why are they...Ch. 35.4 - Prob. 3CCCh. 35.4 - Prob. 4CCCh. 35 - Prob. 1RCCh. 35 - Prob. 2RCCh. 35 - Prob. 3RCCh. 35 - Prob. 1ALCh. 35 - Prob. 2ALCh. 35 - Prob. 3ALCh. 35 - Prob. 4ALCh. 35 - Prob. 5ALCh. 35 - Prob. 6AL
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- What are the steps in a lysogenic infection?arrow_forwardWhy are some pathogens more noticeable than others?arrow_forwardNormal 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.arrow_forward
- 14) When considering virulence factors, which class of virulence factor would be most likely to increase the severity of disease caused by the pathogen possessing the virulence factor, due to this class of virulence factor most likely causing the death of cells? A) extracellular enzymes C) anti-phagocytic factors B) toxins D) adherence factors 15) Which of the following classes of virulence factor is absolutely needed for nearly every infection? In fact, if the organism lacks this factor, it is most likely going to be avirulent (not disease-causing). A) extracellular enzyme B) adherence factor D) anti-phagocytic factor C) exotoxin 16) Which of the following is an iron-binding protein produced by pathogens to access the body's store of iron? A) ferritin B) siderophores C) hemolysin D) transferrin 17) The complement cascade and its by-products contribute to A) attracting phagocytes to sites of infection. B) triggering release of interferons. C) triggering inflammation. D) triggering…arrow_forwardWhich of the following virulence factors among A-D is correctly matched with its definition or characterization? A) O Invasins: pathogen proteins that prevent opsonization of the pathogen B) O Phase variation: allows pathogen to switch between different forms of an extracellular antigen (e.g., flagellum) C) O Protein A. a microbial factor that allows for attachment, typically a surface protein or surface glycoprotein D) O Prevention of lysosome:phagosome fusion mechanism employed by an extracellular pathogen E) OM protein, Opa protein: enzymes that interfere with the functioning of antibodiesarrow_forwardWhich of the following is true of commensal bacterium? Question 2 options: A) commensal bacteria do not receive any benefit from its host B) commensal bacteria only colonize adult hosts C) commensal bacterium may also be an opportunistic pathogen D) commensal bacterium cannot cause an infection its hostarrow_forward
- What are the factors influencing the extent and the deverity of an infection, explain.arrow_forwardWhich virulence factor description among A-E is false? view Later A) O Adhesins: fimbriae or pili are examples of this B) O Invasins: virulence factor of intracellular pathogens C) O Kinases: breaks apart a blood clot; streptokinase is an example. D) O Hyaluronidases: dissolves connections between cells of a tissue E) O Coagulases: found in certain Staphylococcus pathogens; induces clot formation in the body F) O None of A-E is false; all are true 12 Review Later O Type here to search 13 * 12 * esc 立arrow_forwardA disease ____ is a source of the pathogen in the environment a) interferon b) pandemic c) epidemic d) reservoir Please I need a surely answer and a quicker responsearrow_forward
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