Yersinia enterocolitica & pestis Quiz
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Yersinia enterocolitica & pestis Quiz

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Questions and Answers

What is the primary mode of transmission for Yersinia enterocolitica?

  • Insect vector
  • Airborne droplets
  • Direct contact with infected animals
  • Contaminated food and water (correct)
  • Which of the following is a common symptom of Yersinia enterocolitica infection?

  • Bloody diarrhea (correct)
  • Neurological symptoms
  • Pneumonia
  • Rash
  • What is the characteristic staining pattern observed in Yersinia enterocolitica?

  • Uniform staining
  • No staining
  • Gram-positive
  • Bipolar 'safety pin' staining (correct)
  • Which of the following is a common symptom of Yersinia pestis infection?

    <p>Buboes</p> Signup and view all the answers

    What is the primary reservoir and mode of transmission for Yersinia pestis?

    <p>Rodents and their fleas</p> Signup and view all the answers

    How does Yersinia enterocolitica evade the immune system?

    <p>Through the production of a glass capsule</p> Signup and view all the answers

    Which of the following statements regarding Yersinia enterocolitica is NOT true?

    <p>It is a gram-negative bacterium.</p> Signup and view all the answers

    What is the primary virulence factor associated with Yersinia enterocolitica?

    <p>Capsule formation</p> Signup and view all the answers

    Which of the following is NOT a common symptom associated with Yersinia enterocolitica infection?

    <p>Pneumonia</p> Signup and view all the answers

    What is the primary reservoir and mode of transmission for Yersinia pestis?

    <p>Rodents and their fleas</p> Signup and view all the answers

    Which of the following is a characteristic clinical manifestation of Yersinia pestis infection?

    <p>Buboes (swollen lymph nodes)</p> Signup and view all the answers

    Which of the following statements about the transmission of Yersinia enterocolitica is NOT true?

    <p>It can be transmitted through direct person-to-person contact.</p> Signup and view all the answers

    Study Notes

    Yersinia Enterocolitica

    • Gram-negative bacteria with a red hue
    • Also known as enterocholitica due to its association with the English terrier
    • Transmission occurs through zoonotic means, such as:
      • Puppy feces
      • Contaminated milk products
    • Children are the most common individuals infected
    • Resistant to cold temperatures, similar to listeria
    • Exhibits bipolar "safety pin" staining, with heavy staining on two ends
    • Pathogenesis involves an encapsulated virulence factor
    • Diseases caused by Yersinia enterocolitica include:
      • Bloody diarrhea
      • Invasive systemic effects:
        • Fever
        • Intestinal issues
        • Leukocytosis
        • Abscesses
        • Major bowel issues
        • Necrotic bowel
      • Pseudoappendicitis, which mimics appendicitis with symptoms such as:
        • RLQ pain
        • Fever
        • Elevated white count

    Yersinia Pestis

    • Reservoir and transmission occur through zoonotic means, involving:
      • Rodents (usually rats or prairie dogs in the US) as the primary host
      • Fleas as vectors that bite humans
    • Forms buboes with swollen tender lymph nodes
    • Transmitted through human as incidental host, usually with rodents or prairie dogs in the US

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    Description

    Test your knowledge about Yersinia enterocolitica and pestis through this quiz. Learn about the characteristics, transmission, and staining properties of these bacteria.

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