Microbiology: An Introduction
12th Edition
ISBN: 9780321929150
Author: Gerard J. Tortora, Berdell R. Funke, Christine L. Case
Publisher: PEARSON
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Textbook Question
Chapter 15, Problem 9R
How can viruses and protozoa avoid being killed by the host’s immune response?
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How is viruses and protozoans cause pathogenesis and how is it different from bacteria?
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
Why are viruses considered “obligate intracellular parasites”? What does it mean to be “obligate”?
Chapter 15 Solutions
Microbiology: An Introduction
Ch. 15 - Compare pathogenicity with virulence.Ch. 15 - How are capsules and cell wall components related...Ch. 15 - Prob. 3RCh. 15 - Explain how drugs that bind each of the following...Ch. 15 - Prob. 5RCh. 15 - Prob. 6RCh. 15 - Prob. 7RCh. 15 - Which of the following genera is the most...Ch. 15 - How can viruses and protozoa avoid being killed by...Ch. 15 - Prob. 10R
Ch. 15 - The removal of plasmids reduces virulence in which...Ch. 15 - Prob. 2MCQCh. 15 - Prob. 3MCQCh. 15 - All of the following can occur during bacterial...Ch. 15 - The ID50 for Campylobacter sp. is 500 cells; the...Ch. 15 - Prob. 6MCQCh. 15 - A drug that binds to mannose on human cells would...Ch. 15 - The earliest smallpox vaccines were infected...Ch. 15 - Prob. 9MCQCh. 15 - Which of the following statements is true? a. The...Ch. 15 - Prob. 1ACh. 15 - Prob. 3ACh. 15 - How do each of the following strategies contribute...Ch. 15 - On July 8, a woman was given an antibiotic for...Ch. 15 - Explain whether each of the following examples is...Ch. 15 - Cancer patients undergoing chemotherapy are...
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- does a cell know that it has been invaded?arrow_forwardEndotoxin is associated witha) Gram-positive bacteria.b) Gram-negative bacteria.c) the cytoplasmic membrane.d) endospores.arrow_forward___________ are employed to kill the infectious germs and cure a disease.a) Antigens b) Antibiotics c) Vaccines d) Vitaminsarrow_forward
- How does the human normal microbiota play a rolein preventing disease?arrow_forwardWhich of the following is a viral disease that destroys the immune system? A) anemia B) HIV-AIDS C) asthma D) tuberculosisarrow_forwardWhich of the following diseases is NOT caused by a bacterium? Group of answer choices A) Epidemic typhus B) Typhoid fever C) Malaria D) Plaguearrow_forward
- Which of the following highly contagious viruses is a single-stranded ribonucleic acid (RNA) virus with a helical capsid and envelope and is transmitted by coming in contact with respiratory secretions? "This is a highly contagious respiratory illness transmitted when an infected person coughs or sneezes virus particles into the air," the health department said in a written statement. "It's so contagious that if one person is sick and spreading measles, nine out of 10 people around them who aren't immune will get it, too." Group of answer choices a. Measles b. Parvovirus c. Coxsackie virus A d. Rhinovirusarrow_forwardBecause most pathogens cannot survive for extended peri-ods of time outside the body, they must persist within inorder to maintain their ability to infect humans.(a) Macrophages(b) Viruses(c) Reservoirs of infection(d) Endosporesarrow_forwardWhich type of infection is the MOST easily spread to the largest number of people? Question 3 options: a) gastrointestinal b) vector-borne c) respiratory d) sexually transmittedarrow_forward
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