Clinical Bacteriology: Streptococcus, Enterococcus, and Similar Organisms Characteristics
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Questions and Answers

What is the most common cause of subacute bacterial endocarditis?

  • Viridans streptococci (correct)
  • Streptococcus pneumoniae
  • Enterococcus
  • Streptococcus pyogenes
  • Which streptococci is an opportunistic pathogen that can enter the bloodstream through dental procedures?

  • Enterococcus
  • Streptococcus pneumoniae
  • Viridans streptococci (correct)
  • Streptococcus pyogenes
  • Which streptococci are predominantly found in the oral cavity, upper respiratory tract, female genital tract, and gastrointestinal tract?

  • Enterococcus
  • Viridans streptococci (correct)
  • Streptococcus pyogenes
  • Streptococcus pneumoniae
  • Which streptococci have virulence factors including capsule, extracellular dextrans & glucans, and surface-associated adhesions?

    <p>Viridans streptococci</p> Signup and view all the answers

    What type of infections can be caused by Group C, G & F Streptococci in neonates?

    <p>Meningitis and pneumonia</p> Signup and view all the answers

    Which streptococci are skin tested to detect the presence of antibodies against pneumococci?

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

    Which of the following infections is associated with maternal infection by Streptococci?

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

    Which streptococcus is commonly isolated in children under 3 years old with recurrent otitis media?

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

    What is a characteristic feature of S.dysagalctiae subsp.equisimilis among Streptococci?

    <p>LARGE-colony forming; beta-hemolytic</p> Signup and view all the answers

    Enterococcus is indigenous to which part of the body?

    <p>Intestinal tracts</p> Signup and view all the answers

    What kind of reaction do Enterococci produce that results in weak bubble formation?

    <p>Pseudocatalase reaction</p> Signup and view all the answers

    Which virulence factor of Enterococcus plays a role in adherence?

    <p>Extracellular surface adhesion proteins</p> Signup and view all the answers

    Which term best describes the arrangement of Streptococci in thioglycollate broth?

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

    What is the catalase characteristic of Streptococci?

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

    Which group of Streptococci requires 5-10% CO2 for growth?

    <p>Pyogenic Group</p> Signup and view all the answers

    Which hemolytic pattern is associated with Alpha Hemolytic Streptococci?

    <p>Partial/Incomplete hemolysis</p> Signup and view all the answers

    What type of colonies are commonly observed in Streptococci cultures?

    <p>Grayish and pinpoint</p> Signup and view all the answers

    What distinguishes Streptococcus pneumoniae from other Streptococci in terms of arrangement?

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

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