Microbiology Fundamentals: A Clinical Approach
3rd Edition
ISBN: 9781259709227
Author: Marjorie Kelly Cowan Professor, Heidi Smith
Publisher: McGraw-Hill Education
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Chapter 11, Problem 18Q
Summary Introduction
To deduce:
The circumstances that make lower virulence of no advantage to a pathogen.
Concept introduction:
There are certain circumstances when the first exposure of microbes is quite virulent; however, with the passage of time with the new host, it causes a milder form of the disease. There are various pathogens which spread their infections to humans. Zoonosis is a type of infection which is indigenous to animals but it is naturally transmissible to humans also.
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Question 1
Which is mismatched?
1
adhesins - help pathogen attach to host cells
2
neurotoxin - exotoxin that act on nervous system tissues
3
enterotoxin - exotoxin that acts on GI tract tissue
4
endotoxin - lyses red blood cells
5
streptokinase - digests blood clots
Question 2
Which of the following virulence mechanisms is mismatched:
1
hemolysins - lyse red blood cells
2
leukocidins - break down substance between cells ("cellular cement")
3
capsule - antiphagocytic
4
coagulase - activates clotting proteins
5
streptokinase - dissolves fibrin clots
Question 3
Which of the following contributes the LEAST to the virulence of microorganisms?
1
capsules
2
endotoxin
3
fimbriae
4
leukocidin production
5
flagella
Chapter 11 Solutions
Microbiology Fundamentals: A Clinical Approach
Ch. 11.1 - Prob. 1AYPCh. 11.1 - Enumerate the sites where normal biota is found in...Ch. 11.1 - Discuss how the Human Microbiome Project is...Ch. 11.1 - Prob. 2NPCh. 11.2 - Differentiate between a microbes pathogenicity and...Ch. 11.2 - Prob. 5AYPCh. 11.2 - Explain the significance of polymicrobial...Ch. 11.2 - Prob. 7AYPCh. 11.2 - Prob. 8AYPCh. 11.2 - Prob. 9AYP
Ch. 11.2 - Prob. 10AYPCh. 11.2 - Prob. 11AYPCh. 11.2 - Draw a diagram of the stages of disease in a humanCh. 11.2 - Prob. 13AYPCh. 11.2 - Prob. 14AYPCh. 11.2 - Define healthcare-associated infection, and list...Ch. 11.2 - Prob. 16AYPCh. 11.2 - Prob. 1MMCh. 11.2 - Prob. 3NPCh. 11.2 - Prob. 2MMCh. 11.2 - Prob. 4NPCh. 11.2 - Prob. 5NPCh. 11.2 - Q. Can you think of what type of incident might...Ch. 11.2 - Prob. 6NPCh. 11.3 - Summarize the goals of epidemiology, and...Ch. 11.3 - Prob. 18AYPCh. 11.3 - Prob. 19AYPCh. 11.3 - Discuss the three major types of epidemics, and...Ch. 11 - Prob. 1NPCh. 11 - Prob. 1QCh. 11 - Prob. 2QCh. 11 - Prob. 3QCh. 11 - Prob. 4QCh. 11 - Prob. 5QCh. 11 - Discuss the role of endospores in ensuring the...Ch. 11 - Prob. 7QCh. 11 - Correlate the stages in the course of an...Ch. 11 - Prob. 9QCh. 11 - Prob. 10QCh. 11 - Prob. 11QCh. 11 - Prob. 12QCh. 11 - Prob. 13QCh. 11 - Prob. 14QCh. 11 - Prob. 15QCh. 11 - Prob. 16QCh. 11 - Prob. 17QCh. 11 - Prob. 18QCh. 11 - The number of cases, including new cases as well...Ch. 11 - Prob. 20QCh. 11 - One important way to critically analyze a study...Ch. 11 - Prob. 1VC
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- A microbiologist argued that there is no such thing as “normal” microbiota of the human body, since the population is dynamic and is constantly changing, depending on diet and external environment. What would be an argument against this microbiologist’s view?arrow_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_forwardA variety of microorganisms live as symbionts in the human digestive tract. What Determines whether their relationship with the human is parasitic or mutualisticarrow_forward
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