Bacterial Infections and Sources

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Questions and Answers

Which of the following antigens is a classic example of a K antigen?

  • L antigen
  • K1 antigen (correct)
  • H antigen
  • O antigen

Which Shigella species is associated with postinfectious arthritis in HLA-B27-positive patients?

  • S.sonnei
  • S.flexneri
  • S.dysenteriae (correct)
  • S.boydii

What is the characteristic of Klebsiella colonies on blood agar?

  • Slimy
  • Dry
  • Mucoid (correct)
  • Rough

What is the purpose of MacConkey agar in the identification of Enterobacteriaceae?

<p>To differentiate based on lactose fermentation (D)</p> Signup and view all the answers

What is the etiologic agent of typhoid fever?

<p>Salmonella typhi (B)</p> Signup and view all the answers

Which of the following is NOT a characteristic of typhoid fever?

<p>Gastrointestinal symptoms (D)</p> Signup and view all the answers

What is the characteristic of Gram staining reaction in Enterobacteriaceae?

<p>Helpful in speciation (C)</p> Signup and view all the answers

What is the characteristic of the K antigen?

<p>Heat stable (C)</p> Signup and view all the answers

Which of the following media is used to isolate Salmonella species?

<p>XLD agar (C)</p> Signup and view all the answers

What is the characteristic of bipolar staining?

<p>Typical of Salmonella (B)</p> Signup and view all the answers

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