Bacterial Identification Quiz
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Questions and Answers

What type of hemolysis does E. faecalis exhibit on BAP?

  • Gamma hemolytic
  • Alpha hemolysis
  • Beta hemolysis (correct)
  • No hemolysis
  • Which test shows a positive result for S. agalactiae?

  • Hippurate hydrolysis
  • 6.5% NaCl (correct)
  • Catalase
  • PYR
  • What is the colony shape of S. agalactiae on BAP?

  • Small / convex (correct)
  • Large / flat
  • Medium / irregular
  • Rough / irregular
  • Which organism shows positive results in the PYR test?

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

    What is a distinguishing characteristic of Micrococcus luteus compared to E. faecalis and S. agalactiae based on the tests indicated?

    <p>It is catalase positive</p> Signup and view all the answers

    Which bacteria is identified as being positive for coagulase testing?

    <p>Staphylococcus aureus</p> Signup and view all the answers

    What does a gamma hemolysis result indicate about a bacterial organism?

    <p>No lysis of red blood cells</p> Signup and view all the answers

    Which organism is identifiable by its yellow or white colonies on culture media?

    <p>M. luteus</p> Signup and view all the answers

    In the context of bacterial identification, what does a positive catalase test signify?

    <p>Ability to break down hydrogen peroxide</p> Signup and view all the answers

    What biochemical reaction is indicated by a positive optochin sensitivity test?

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

    What type of bacteria is organism #8 based on its Gram stain result?

    <p>Gram-positive</p> Signup and view all the answers

    Which growth characteristic is observed for organism #9 on Blood Agar Plate (BAP)?

    <p>Small, circular colonies</p> Signup and view all the answers

    What is the arrangement of organism #9 based on the provided observations?

    <p>Singles or diplococci</p> Signup and view all the answers

    Which of the following characteristics was not provided for organism #8?

    <p>6.5% NaCl tolerance</p> Signup and view all the answers

    What type of hemolysis is observed for organism #9 on the Blood Enrichment Agar (BEA)?

    <p>Alpha-hemolysis</p> Signup and view all the answers

    What reaction did organism #8 display in the catalase test?

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

    Among the following features of organism #9, which one indicates a potential identification feature?

    <p>Alpha-hemolysis on BEA</p> Signup and view all the answers

    What was the result of the hippurate test for organism #9?

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

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