Clinical Significance of Streptococcus Quiz
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Clinical Significance of Streptococcus Quiz

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Questions and Answers

Which specimen is NOT typically used for laboratory analysis in disease identification?

  • Sweat samples (correct)
  • Lesion samples
  • Throat swabs
  • Sputum

    • From which of the following can laboratory specimens for analysis be obtained?

  • Nasal swabs
  • Urine
  • Saliva
  • Blood (correct)

    • What type of sample is typically taken from a lesion for laboratory analysis?

  • Skin scrape
  • Blood
  • Saliva
  • Pus (correct)

    • Which of the following is a form of specimen obtained for laboratory analysis in disease diagnosis?

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

    What is a potential source of specimens for laboratory analysis according to the form of the disease?

    <p>Spinal fluid</p> Signup and view all the answers

    What is one major syndrome associated with S.pyogenes?

    <p>Acute pharyngitis or pharyngo-tonsillitis</p> Signup and view all the answers

    Which of the following conditions is NOT commonly associated with S.pyogenes?

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

    Which of the following can lead to cellulitis?

    <p>S.pyogenes</p> Signup and view all the answers

    Which is a skin-related condition potentially caused by S.pyogenes?

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

    Among the listed conditions, which one is considered a syndrome caused by S.pyogenes?

    <p>Scarlet fever</p> Signup and view all the answers

    What effect does this toxin have on polymorphonuclear leukocytes?

    <p>It inhibits their activity.</p> Signup and view all the answers

    Which of the following diseases is associated with the bacteria producing this toxin?

    <p>Acute bacterial pneumonia.</p> Signup and view all the answers

    How does this toxin influence cytokine production?

    <p>It stimulates the production of proinflammatory cytokines.</p> Signup and view all the answers

    Which of the following processes is activated by the toxin?

    <p>Complement activation.</p> Signup and view all the answers

    What impact does this toxin have on inflammation?

    <p>It induces an inflammatory response.</p> Signup and view all the answers

    Which test detects a patient's antibody titer to Streptolysin O following a Group A Streptococcus infection?

    <p>ASO titer test</p> Signup and view all the answers

    What characteristic distinguishes S.pyogenes from other streptococci?

    <p>Catalase-negative status</p> Signup and view all the answers

    Which resistance property does S.pyogenes exhibit?

    <p>Optochin resistant</p> Signup and view all the answers

    What is true about the sensitivity of S.pyogenes to bacitracin?

    <p>It is highly sensitive to bacitracin</p> Signup and view all the answers

    What does a positive ASO titer test indicate?

    <p>Recent infection with Group A Streptococcus</p> Signup and view all the answers

    Which specimen is NOT suitable for laboratory evaluation in diagnosing S. pneumoniae?

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

    What type of colonies would be expected when S. pneumoniae is cultured under specific conditions?

    <p>a-Hemolytic colonies</p> Signup and view all the answers

    At what temperature should S. pneumoniae specimens be incubated for optimal culture results?

    <p>37°C</p> Signup and view all the answers

    When performing laboratory evaluations for S. pneumoniae, which method is appropriate for obtaining specimens?

    <p>Nasopharyngeal swab</p> Signup and view all the answers

    Which of the following methods is least likely to yield clinical specimens for the evaluation of S. pneumoniae?

    <p>Sweat test</p> Signup and view all the answers

    Study Notes

    Clinical Significance of Streptococcus pyogenes

    • Streptococcus pyogenes (Group A Streptococcus, GAS) is a major cause of cellulitis.
    • GAS causes a variety of infections, including:
      • Acute pharyngitis or pharyngo-tonsillitis
      • Impetigo
    • Depending on the type of infection, specimens for laboratory analysis can be obtained from:
      • Throat swabs
      • Pus and lesion samples
      • Sputum
      • Blood
      • Spinal fluid
    • S. pyogenes is highly sensitive to bacitracin.
    • S. pyogenes is catalase-negative and optochin resistant.

    Clinical Significance of Streptococcus pneumoniae

    • Streptococcus pneumoniae (pneumococcus) is the major cause of bacterial pneumonia.
    • Specimens for laboratory analysis can be obtained from:
      • Nasopharyngeal swab
      • Blood
      • Pus
      • Sputum
      • Spinal fluid
    • S. pneumoniae produces alpha-hemolytic colonies when grown on blood agar at 37°C.

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    Related Documents

    Streptococcus. Pyogenes and Streptococcus pneumoniae PDF

    Description

    Test your knowledge on the clinical significance of Streptococcus pyogenes and Streptococcus pneumoniae. This quiz covers their associated infections, laboratory analysis methods, and distinguishing characteristics. Perfect for students studying microbiology or healthcare professionals.

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