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Questions and Answers
What is the purpose of the lysine decarboxylase test in differentiating between Shigella and E. coli?
What is the purpose of the lysine decarboxylase test in differentiating between Shigella and E. coli?
- To separate the two species based on their metabolic properties (correct)
- To determine the presence of Shiga toxin
- To identify the virulence factors of E. coli
- To distinguish between motile and non-motile bacteria
Which of the following is a characteristic of Shigella that distinguishes it from E. coli?
Which of the following is a characteristic of Shigella that distinguishes it from E. coli?
- Production of Shiga toxin
- Non-motility (correct)
- Indole production
- Motility
What is the primary mode of transmission of EHEC?
What is the primary mode of transmission of EHEC?
- Airborne transmission
- Contaminated food and water (correct)
- Vector-borne transmission
- Direct contact with infected individuals
What is the primary complication of Shiga-toxin infections?
What is the primary complication of Shiga-toxin infections?
Which of the following E. coli strains is commonly associated with traveler's diarrhea?
Which of the following E. coli strains is commonly associated with traveler's diarrhea?
What is the primary mechanism of action of Shiga toxin?
What is the primary mechanism of action of Shiga toxin?
What is the primary mechanism by which Shigella species breach the mucus layer in the gut?
What is the primary mechanism by which Shigella species breach the mucus layer in the gut?
What is the typical duration of a self-limiting Shigella infection?
What is the typical duration of a self-limiting Shigella infection?
What is a characteristic symptom of Shigella infection?
What is a characteristic symptom of Shigella infection?
Why is antibiotic treatment necessary for Shigella infections?
Why is antibiotic treatment necessary for Shigella infections?
What is a key challenge in distinguishing Shigella from E. coli in the laboratory?
What is a key challenge in distinguishing Shigella from E. coli in the laboratory?
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