Pre And Post Test For Extended Spectrum Beta-lactamases

4 Questions | Total Attempts: 16

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Pre And Post Test For Extended Spectrum Beta-lactamases

This pretest is given to determine if you already know information contained within this learning module.


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Questions and Answers
  • 1. 
    Which statement below correctly describes the beta-lactamase production by the organism growing on this Mueller-Hinton Double Disk plate?
    • A. 

      This organism is sensitive to all disk with the exception of CAZ which appears to be intermediate. No ESBL identified on this plate.

    • B. 

      There appears to be inhibitor effect between the disk CAZ and CAZ-CLA but not CTX and CTX-CLA. Both need to be present in order to call the ESBL phenotype.

    • C. 

      Cefoxitin appears to be more resistant than cefotetan indicating a phenotype other than ESBL.

    • D. 

      Inhibitor effect is noted between CAZ and CAZ-CLA. This is a sign that the organism is producing extended spectrum beta lactamases.

    • E. 

      I am unfamiliar with this material

  • 2. 
     Decide if this plate displays signs of an classical ESBL.
    • A. 

      Yes, the plate above displays features which identify an ESBL.

    • B. 

      No, the plate above does not display features which identify an ESBL.

    • C. 

      I am unfamiliar with this material.

  • 3. 
    Which statement below correctly describes features that we use to identify the AmpC phenotype?
    • A. 

      Aztreonam is more resistant than ertapenem and ceftriaxone is more resistant than cefotetan.

    • B. 

      Cefoxitin is resistant and cefepime is sensitive.

    • C. 

      Inhibitor effect or keyholes are observed on the plate.

    • D. 

      Ertapenem shows more resistance than imipenem.

    • E. 

      I am unfamiliar with this material.

  • 4. 
     and Which aberrant phenotype is displayed on this plate?
    • A. 

      ESBL

    • B. 

      AmpC

    • C. 

      KPC

    • D. 

      K1

    • E. 

      I am unfamiliar with this material.