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What is the primary virulence factor of Escherichia coli O157:H7?

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Question: What is the primary virulence factor of Escherichia coli O157:H7?

Options:

  1. Endotoxin
  2. Shiga toxin
  3. Capsule
  4. Flagella

Correct Answer: Shiga toxin

Solution: 

Escherichia coli O157:H7 produces Shiga toxin, which can cause severe gastrointestinal disease and hemolytic uremic syndrome.

What is the primary virulence factor of Escherichia coli O157:H7?

Practice Questions

Q1
What is the primary virulence factor of Escherichia coli O157:H7?
  1. Endotoxin
  2. Shiga toxin
  3. Capsule
  4. Flagella

Questions & Step-by-Step Solutions

What is the primary virulence factor of Escherichia coli O157:H7?
  • Step 1: Understand that Escherichia coli O157:H7 is a type of bacteria.
  • Step 2: Learn that this bacteria can make a harmful substance called Shiga toxin.
  • Step 3: Recognize that Shiga toxin can lead to serious health problems, like severe stomach issues.
  • Step 4: Know that one of the severe conditions caused by Shiga toxin is called hemolytic uremic syndrome, which affects the kidneys.
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