Nester's Microbiology: A Human Perspective
Nester's Microbiology: A Human Perspective
9th Edition
ISBN: 9781259709999
Author: Denise G. Anderson Lecturer, Sarah Salm, Deborah Allen
Publisher: McGraw-Hill Education
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Chapter 24, Problem 7SA

Name four different pathogenic groups of Escherichia coli.

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While it is true that not all coliforms are pathogenic under normal conditions, please name two situations that can occur due to infection by pathogenic strains.
What are the common pathogens isolated from stool samples? What is the difference between a coliform bacterium and a noncoliform enteric bacterium? What diagnostic test differentiates Proteus and Providencia species from other Enterobacteriaceae? How would you differentiate between serotypes of E. coli? Are the gram-negative enteric bacilli fastidious organisms? Would they survive well outside of the body? If so, what significance would this have in their transmission? Why is serotyping particularly important in Salmonella infections and typhoid fever?
Why does Helicobacter pylori cause ulceractions in the lining of the Stomach? 1)The microbes secrete a toxin that prevents the host from detecting invasion of the microbe and thus allows it to thrive in the stomach and damage the host cells. 2)After invasion of the microbe in the cells lining the stomach, they are no longer able to produce mucous to protect the host cells from acid erosion 3)The microbe produces an enzyme that causes the cell to produce potent digestive enzymes that erode the stomach lining. 4)Once the microbe has entered the stomach, it releases digestive enzymes that degrade the mucous secreting cells.
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