Microbiology: An Introduction
11th Edition
ISBN: 9780321733603
Author: Gerard J. Tortora, Berdell R. Funke, Christine L. Case
Publisher: Benjamin Cummings
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Question
Chapter 15, Problem 6MCQ
Summary Introduction
Introduction:
Some of the bacteria enclose themselves by capsules formed of polysaccharides called encapsulated. These encapsulated stains of the bacteria are more virulent and resistant to intracellular killing than non-encapsulated stains.
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An infection that spreads from a local site to other tissues is known as a
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e. none of the above
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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 - Prob. 1ACh. 15 - Prob. 2ACh. 15 - Prob. 3ACh. 15 - How do each of the following strategies contribute...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 - 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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Similar questions
- -Which of the following is not an example of a virulence factor? a. the pathogen changes it spike proteins over a short period of time b. the pathogen is nosocomial c. the pathogen can lyse phagosomes d. Lipopolysaccharide (LPS)arrow_forwardVirulence factors includea. toxins b. exoenzymes c. capsules d. all of thesearrow_forwardH1N1 is a component of:a. Infectious Microbe b. Reservoir c. Portal of Exit d. Portal of Entry e. Mode of Transmissionf. Susceptible Hostarrow_forward
- Match the pathogen to the correct virulence factor Varicella-zoster virus Staphylococcus aureus Streptococcus pyogenes Pseudomonas aeroginosa Clostridium tetani A. latent infection B. clumping factor C. Exotoxin B and F protein D. Exoenzyme S E. neurotoxinarrow_forwardDifferent strains of Streptococcus pyogenes have different virulence factors, giving these microbes much versatility. Virulence factors include which of the following? Choose one or more: A.A capsule that, when thick, will help the organism avoid phagocytosis by macrophages B.A cell wall containing lipoteichoic acid, thought to facilitate adherence to pharyngeal epithelial cells C.Enzymes that lyse blood cells (streptolysins) D.The production of several endotoxins called streptococcal pyogenic endotoxins (SPEs)arrow_forwardWhich of the following describes "incubation period"? a. It is the time interval between entry of an infectious agent into the body and the appearence of the first symptoms and/or signs of the disease b. It is the time after recovery when a person can still harbor the infection c. It is the time interval through which an infected person is able to transmit the infectious agent to others d. It is the time interval between the onset of primary and secondary casesarrow_forward
- In the exoerythrocytic phase of infection, Plasmodium invades thea. blood cells b. heart muscle c. salivary glandsd. liverarrow_forwardBacterial capsules a. kill phagocytes b. prevent engulfment by phagocytes c. prevent the activation of complementarrow_forwardWhich of the following is a mis-match? a. Urogenital - often associated with sexually transmitted pathogens b. Respiratory - spread by sneezing C. Parenteral - pathogen is passed from mother to child through the placenta O d. Gastrointestinal - often involves fecal-to-oral transmission e. Conjunctiva - involving eyesarrow_forward
- Select the letter of the choice that best completes the statement. In the chain of infection, colonization and reproduction take place while the agent is in thea. portal of entry link.b. reservoir link.c. portal of exit link.d. transmission link.arrow_forwardWhich of the following is not true? a. Cockroaches can transport a variety of parasites, usually on their external surface. This is an example of mechanical transmission by a vector b. A contamination will inevitably lead to an infection c. Case fatality rate is one of the indicators of virulence of an infectious agent d. None of the pandemics prior to COVID-19 were caused by a coronavirusarrow_forwardWhy are encapsolated bacteria generally more pathogenic than un-capsolated strains. a. Because capsule allows the organism to hide in the body of the host. b. because the capsule causes the phagocyte to mutate c. because the capsule protects bacteria from host immune cells d. because the capsule kills the phagocytes e. because the capsule stimulates a potent immune response in the host.arrow_forward
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