Textbook Question
True or False: Clostridioides difficile cases are usually associated with a prior antibiotic therapy.
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Ch. 19 - Digestive System Infections
Norman-McKay2nd EditionMicrobiology: Basic and Clinical PrinciplesISBN: 9780137661619
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Table of contents
- Ch. 1 - Introduction to Microbiology22
- Ch. 2 - Biochemistry Basics19
- Ch. 3 - Introduction to Prokaryotic Cells17
- Ch. 4 - Introduction to Eukaryotic Cells16
- Ch. 5 - Genetics25
- Ch. 6 - Viruses and Prions12
- Ch. 7 - Fundamentals of Microbial Growth20
- Ch. 8 - Microbial Metabolism16
- Ch. 9 - Principles of Infectious Disease and Epidemiology11
- Ch. 10 - Host Microbe Interactions and Pathogenesis19
- Ch. 11 - Innate Immunity24
- Ch. 12 - Adaptive Immunity22
- Ch. 13 - Immune System Disorders15
- Ch. 14 - Biomedical Applications: Vaccines, Diagnostics, Therapeutics, and Molecular Method14
- Ch. 15 - Antimicrobial Drugs18
- Ch. 16 - Respiratory System Infections16
- Ch. 17 - Skin and Eye Infections19
- Ch. 18 - Nervous System Infections12
- Ch. 19 - Digestive System Infections20
- Ch. 20 - Urinary and Reproductive System Infections10
- Ch. 21 - Cardiovascular and Lymphatic Infections15
Norman-McKay2nd EditionMicrobiology: Basic and Clinical PrinciplesISBN: 9780137661619Not the one you use?Change textbook
Chapter 19, Problem 13
What animals generally serve as the source of Escherichia coli O157:H7 for human infection?
Verified step by step guidance1
Understand that Escherichia coli O157:H7 is a pathogenic strain of E. coli that can cause serious foodborne illness in humans.
Recognize that this strain is commonly found in the intestines of certain animals without causing them harm, acting as reservoirs.
Identify that cattle are the primary animal reservoir for E. coli O157:H7, meaning they carry the bacteria and can contaminate meat or other products.
Note that other ruminants such as sheep and goats can also carry this strain, but cattle are the most significant source for human infections.
Understand that contamination typically occurs through consumption of undercooked beef, unpasteurized milk, or contact with environments contaminated by these animals.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Escherichia coli O157:H7
Escherichia coli O157:H7 is a pathogenic strain of E. coli bacteria that produces Shiga toxin, causing severe foodborne illness in humans. It is known for causing symptoms like bloody diarrhea and hemolytic uremic syndrome, making it a significant public health concern.
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Animal Reservoirs of E. coli O157:H7
Certain animals, especially ruminants like cattle, serve as natural reservoirs for E. coli O157:H7. These animals carry the bacteria in their intestines without showing symptoms, and the bacteria can contaminate meat, milk, or the environment, leading to human infection.
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Transmission Pathways to Humans
Humans typically acquire E. coli O157:H7 through ingestion of contaminated food or water, often linked to undercooked beef or contact with animal feces. Understanding these transmission routes is crucial for preventing infection and controlling outbreaks.
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A father suspects his son has intestinal worms due to his complaint of an itchy bottom. What habit is most likely responsible for his infection?
a. Walking outside barefoot
b. Eating without first washing hands
c. Eating fruit that is not washed
d. Eating undercooked meat
e. Swimming in a nearby freshwater lake
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