Microbiology: E. Coli Characteristics and Antigenic Structure
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Questions and Answers

What is the basis for serotyping or antigenic typing of E. coli?

  • Flagellar antigen H only
  • Somatic antigen O, flagellar antigen H, and capsular antigen K (correct)
  • Somatic antigen O only
  • Capsular antigen K only

    • What is the role of surface antigens in E. coli virulence?

  • They are involved in motility
  • They cause endotoxic activity
  • They protect the organism (correct)
  • They help in genetic recombination

    • What is the function of somatic antigen O in E. coli?

  • Protects the organism
  • Facilitates genetic recombination
  • Provides motility
  • Causes endotoxic activity (correct)

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