Bacterial Species and Clinical Manifestations Quiz
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Questions and Answers

What are the virulence factors of Enterococci?

  • Biofilm formation, flagella, and pili
  • Toxins, exoenzymes, and adhesins
  • Polysaccharide capsule, endotoxin, and outer membrane proteins (correct)
  • Hemolysins, leukocidins, and streptokinase

    • Which species is capsulated and lens-shaped?

  • Enterococci
  • Streptococcus pneumoniae
  • Neisseria meningitidis (correct)
  • Streptococcus pyogenes

    • How can Neisseria meningitidis be diagnosed in the laboratory?

  • Urine antigen detection
  • Culturing from CSF, blood, or nasopharyngeal swabs (correct)
  • Serologic testing
  • PCR testing

    • Which infection can Neisseria meningitidis cause in susceptible individuals?

    <p>Pyogenic meningitis and septicemia</p> Signup and view all the answers

    What is the drug of choice for treating Neisseria meningitidis infections?

    <p>Third generation cephalosporins</p> Signup and view all the answers

    What is the most common clinical manifestation of Streptococcus pneumoniae infection?

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

    Which of the following is the most important virulence factor of Streptococcus pneumoniae?

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

    How can Streptococcus pneumoniae be differentiated from other Streptococcus species in the laboratory?

    <p>By their susceptibility to optochin</p> Signup and view all the answers

    Which antibiotic is the drug of choice for treating Streptococcus pneumoniae infections?

    <p>Penicillin-G</p> Signup and view all the answers

    Which vaccine is recommended for the prevention of pneumococcal infections?

    <p>Both PPSV23 and PCV13</p> Signup and view all the answers

    What is the primary reservoir for Streptococcus agalactiae (Group B Streptococcus)?

    <p>Female genital tract</p> Signup and view all the answers

    Which of the following is NOT a suppurative manifestation of Streptococcus pyogenes?

    <p>Acute rheumatic fever</p> Signup and view all the answers

    What is the leading cause of lobar pneumonia and otitis media in children, as well as meningitis in all ages?

    <p>Streptococcus pneumoniae</p> Signup and view all the answers

    Which of the following statements about the laboratory diagnosis of Streptococcus pyogenes is INCORRECT?

    <p>It is bacitracin-resistant</p> Signup and view all the answers

    Which virulence factor of Streptococcus pyogenes is responsible for non-suppurative manifestations like acute rheumatic fever and post-streptococcal glomerulonephritis?

    <p>Molecular mimicry</p> Signup and view all the answers

    Which antibiotic is primarily used for the treatment of Streptococcus pyogenes infections?

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

    Which of the following statements about Streptococcus pyogenes is CORRECT?

    <p>It can cause dental caries, subacute bacterial endocarditis, and suppurative infections</p> Signup and view all the answers

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