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Microbiology With Diseases By Taxonomy (6th Edition)
6th Edition
ISBN: 9780134832302
Author: Robert W. Bauman Ph.D.
Publisher: PEARSON
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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.
Which 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 host
Different 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)
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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.arrow_forwardA 19-year old female presented at the ER with fever, vomiting, intense headache and stiff neck. a )List three bacterial pathogens that would most likely be the cause of these signs and symptoms. Briefly describe each pathogen. b) What treatment would you immediately start?arrow_forwardThe most common causes of bacterial meningitis can be the result of infection by three very different bacteria. Which bacteria are they and how are these microbes similar to each other?arrow_forward
- Mycobacterium tuberculosis recruits phagocytes to the site of infection. Based on this information, which of the three methods shown here does the bacterium likely use to avoid being destroyed?arrow_forwardMycobacterium tuberculosis is very difficult to stain because of the A) presence of ribosomes in the cytoplasm. B) location of the DNA within the cell. C) large amounts of a waxlike lipids present in its cell wall. D) lack of a cell wall.arrow_forwardIn this case, bacteria were introduced to the patient’s muscles through an injection. How else might an infectious agent be introduced to skeletal muscle or bone?arrow_forward
- How does Mycobacterium tuberculosis gain access through that preferred portal of entry Explain how the Mycobacterium tuberculosis is able to evade innate human host defenses that prevent this from occurring. discuss specific components of your pathogen. (Examples may include capsules, cell wall components, exoenzymes, antigenic variation and penetration of the host cell cytoskeleton.)arrow_forwardWhich statement made by the patient newly diagnosed with systemic lupus erythematosus indicates a need for further teaching about the course and management of this disease? a) "I will take my medication even if my symptoms improve." Ob) "I will not have my hair dyed, frosted, or permed unless I am in a period of remission." Oc) "I will report any fever to my healthcare provider immediately." d) "I will sunbathe as often as possible to ensure I get enough vitamin D."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_forward
- Explain how the body (including cells, organs, organ systems) is affected by the bacterium called Neisseria meningitidis? Are there any long-term effects caused by the bacterium, even after recovery?arrow_forwardWhich of the following cells predominate at the sites of chronic bacterial infections? b) Macrophages c) B cells D) Basophils e) Mast cellsarrow_forwardLysozyme does which of the following?a) Disrupts cell membranesb) Hydrolyzes peptidoglycanc) Waterproofs skind) Propels gastrointestinal contentse) Propels the cilia of the respiratory tractarrow_forward
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