Brock Biology of Microorganisms (15th Edition)
Brock Biology of Microorganisms (15th Edition)
15th Edition
ISBN: 9780134261928
Author: Michael T. Madigan, Kelly S. Bender, Daniel H. Buckley, W. Matthew Sattley, David A. Stahl
Publisher: PEARSON
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Chapter 32.8, Problem 1CR

Staphylococcal food poisoning results from the ingestion of a preformed staphylococcal enterotoxin, a superantigen produced by cells of Staphylococcus aureus as they grow in food. Proper food preparation, handling, and storage can prevent staphylococcal food poisoning.

What causes the symptoms of staphylococcal food poisoning? Why are cases of staph food poisoning often linked to a food preparer?

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What causes the symptoms of staphylococcal foodpoisoning? Why are cases of staph food poisoning oftenlinked to a food preparer?
Explain the role of pylori in the pathogenesis of peptic ulcers. Which populations are most susceptible to peptic ulcers? Is H. pylori normal flora? If so, what causes the species to become pathogenic? Construct at table to compare and contrast the 5 steps of microbial pathogenesis. How does extracellular growth differ from intracellular growth? Diagram the 5 step pathogenesis cycle for coli O157:H7, an extracellular, intestinal pathogen acquired by consuming contaminated food/water. Be sure to include the role of exoenzymes and the Shiga exotoxin in your diagram. (2 points) Explain the pathogenesis of Listeria monocytogenes. Be sure to include temperature regulation, intracellular growth, and at risk groups in your discussion.
The intestinal epithelium produces a variety of antimicrobial peptides that play a crucial role in establishing the balance of commensal organisms versus pathogens constituting the healthy host microbiota. Studies have found that, in Crohn's disease, individuals have dysbiosis, a condition in which there is disruption of the normal composition of the host microbiota. It is, therefore, not surprising that several cases of Crohn's disease have been linked to: Reduced recruitment of neutrophils to the intestinal mucosa O Increased IL-10 secretion by intestinal macrophages O Reduced production of IL-1-3 in response to microbial antigens O Defects in production of antimicrobial peptides in Paneth cells O Reduced number of Th17 cells in the lamina propria

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Brock Biology of Microorganisms (15th Edition)

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