The Vi antigen of Salmonella Typhi is best described as which of the following?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $24.99Unlock all

Prepare for the Clinical Laboratory Science Bacteriology Test. Engage with multiple choice questions and flashcards with helpful hints and explanations. Ace your exam confidently!

Multiple Choice

The Vi antigen of Salmonella Typhi is best described as which of the following?

Explanation:
The Vi antigen is a capsule-associated polysaccharide produced by Salmonella Typhi that serves as a virulence factor and is targeted in vaccines. It is a capsular antigen, distinct from the surface O (somatic) antigen of the LPS and from the flagellar H antigen. Among these properties, the Vi capsule is described as heat-labile, meaning its structure—and thus its antigenic identity—can be damaged by heat. This contrasts with many other bacterial components, where heating can preserve or differently affect antigenicity. So, the Vi capsule’s key trait is that it’s a capsular antigen whose antigenic integrity is sensitive to heat.

The Vi antigen is a capsule-associated polysaccharide produced by Salmonella Typhi that serves as a virulence factor and is targeted in vaccines. It is a capsular antigen, distinct from the surface O (somatic) antigen of the LPS and from the flagellar H antigen. Among these properties, the Vi capsule is described as heat-labile, meaning its structure—and thus its antigenic identity—can be damaged by heat. This contrasts with many other bacterial components, where heating can preserve or differently affect antigenicity. So, the Vi capsule’s key trait is that it’s a capsular antigen whose antigenic integrity is sensitive to heat.

More Multiple Choice Questions
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy