Foundations in Microbiology
9th Edition
ISBN: 9780073522609
Author: Kathleen Park Talaro, Barry Chess Instructor
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 20.L2, Problem 1CT
What is the logic behind testing for E. coli to detect fecal contamination of water?
Expert Solution & Answer
Summary Introduction
To determine:
The logic behind testing for E. coli to detect fecal contamination of water.
Introduction:
E. coli is a common inhabitant of the human intestine; it is also able to survive in the outside environment.
Explanation of Solution
Coliforms such as E. coli are used to detect fecal contamination in water samples due to their widespread presence in the human intestine. They are able to survive in the outside environment, and will therefore provide a reasonable inoculum for culture tests. They are also easier to culture than true pathogens. For this reason, they are used as the initial indicator for fecal contamination; their presence indicates the possible presence of true enteric pathogens such as Salmonella.
Conclusion
E. coli is used to detect fecal contamination in water due to the fact that it is a prominent inhabitant of the human intestine, it is able to survive in the environment and it is easier to culture than true enteric pathogens.
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Chapter 20 Solutions
Foundations in Microbiology
Ch. 20.1 - Explain the effect of the virulence factor common...Ch. 20.1 - Identify those people most at risk of developing a...Ch. 20.1 - Briefly describe the human infections caused by...Ch. 20.1 - How can antibiotic treatment of a gram-negative...Ch. 20.2 - Name the genera of bacteria that are...Ch. 20.2 - Outline the pathology and epidemiology of...Ch. 20.2 - Explain the epidemiology of Francisella tularensis...Ch. 20.2 - Prob. 6ELOCh. 20.2 - Prob. 7ELOCh. 20.2 - Prob. 8ELO
Ch. 20.2 - List the four genera of bacteria that cause...Ch. 20.2 - Prob. 4CYPCh. 20.2 - Prob. 5CYPCh. 20.2 - Prob. 6CYPCh. 20.2 - What is unusual about the reservoir of Legionella?...Ch. 20.3 - Recall the medically important members of the...Ch. 20.3 - Prob. 10ELOCh. 20.3 - Explain the importance of the three major surface...Ch. 20.3 - Name the key characteristics shared by the...Ch. 20.3 - Explain what is meant by IMViC.Ch. 20.3 - Prob. 10CYPCh. 20.3 - Prob. 11CYPCh. 20.3 - Briefly describe the methods used to isolate and...Ch. 20.3 - Prob. 13CYPCh. 20.4 - Differentiate among the major enteric pathologies...Ch. 20.4 - Explain the role of E. coli in infantile and...Ch. 20.4 - Prob. 14ELOCh. 20.4 - Prob. 14CYPCh. 20.4 - Prob. 15CYPCh. 20.4 - Justify treating E. coli Ol57:H7 differently from...Ch. 20.4 - Prob. 17CYPCh. 20.5 - Differentiate between true noncoliform enteric...Ch. 20.5 - Distinguish the pathologies of typhoidal and...Ch. 20.5 - Identify the possible sources of Shigella...Ch. 20.5 - Prob. 18ELOCh. 20.5 - Prob. 19ELOCh. 20.5 - Prob. 18CYPCh. 20.5 - Prob. 19CYPCh. 20.5 - What are the Five F’s and how do they relate to...Ch. 20.5 - Prob. 22CYPCh. 20.5 - Which body systems are commonly infected by...Ch. 20.5 - Describe the epidemiology and pathology of...Ch. 20.L1 - A unique characteristic of many isolates of...Ch. 20.L1 - Prob. 2MCQCh. 20.L1 - Prob. 3MCQCh. 20.L1 - A classic symptom of pertussis is a. labored...Ch. 20.L1 - Prob. 5MCQCh. 20.L1 - Prob. 6MCQCh. 20.L1 - Prob. 7MCQCh. 20.L1 - Which of the following is a major difference...Ch. 20.L1 - A complication/complications of typhoid fever...Ch. 20.L1 - Prob. 10MCQCh. 20.L1 - Prob. 11MCQCh. 20.L1 - Haemophilus influnzae is ____________ and requires...Ch. 20.L1 - Prob. 13MCQCh. 20.L1 - Prob. 14MCQCh. 20.L1 - Single Matching. Match the infectious agent with...Ch. 20.L1 - Prob. 1CSRCh. 20.L1 - Prob. 2CSRCh. 20.L1 - Prob. 3CSRCh. 20.L1 - Prob. 1WCCh. 20.L1 - What are unique features in the epidemiology of E....Ch. 20.L1 - Explain several practices an individual can use to...Ch. 20.L1 - Prob. 4WCCh. 20.L1 - Briefly outline the zoonotic infections in this...Ch. 20.L2 - What is the logic behind testing for E. coli to...Ch. 20.L2 - Identify the genera with the following...Ch. 20.L2 - Given that so many infections arc caused by...Ch. 20.L2 - Prob. 4CTCh. 20.L2 - Students in our classes sometimes ask how it is...Ch. 20.L2 - Explain lhe reasons for an increase in numbers of...Ch. 20.L2 - Compare and contrast the pathology, diagnosis, and...Ch. 20.L2 - Prob. 8CTCh. 20.L2 - Prob. 9CTCh. 20.L2 - Prob. 10CTCh. 20.L2 - "There is no circumstance [in which] you can cook...Ch. 20.L2 - Use figure 20.5 a, b as a reference guideline for...
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