Antibiotics Mode of Action Quiz

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Questions and Answers

What characteristic of Pseudomonads allows them to be easily differentiated from lactose-fermenting bacteria?

  • Their ability to ferment lactose
  • Their rapid growth on culture media
  • Their production of pigments
  • Their inability to ferment lactose (correct)

Which of the following best describes the growth characteristics of Pseudomonads?

  • Pseudomonads are fastidious and difficult to culture
  • Pseudomonads grow readily on most culture media (correct)
  • Pseudomonads require specific, nutrient-rich media for growth
  • Pseudomonads grow slowly on most culture media

Which of the following is a key distinguishing feature between Pseudomonads and lactose-fermenting bacteria?

  • Pseudomonads do not ferment lactose, unlike lactose-fermenting bacteria (correct)
  • Pseudomonads are more resistant to antibiotics than lactose-fermenting bacteria
  • Pseudomonads produce more pigments than lactose-fermenting bacteria
  • Pseudomonads have a higher growth rate than lactose-fermenting bacteria

What is the primary implication of Pseudomonads' ability to 'grow readily on most culture media'?

<p>Pseudomonads are easily cultured and differentiated from other bacteria (D)</p> Signup and view all the answers

Which of the following best explains why Pseudomonads are 'easily differentiated from the lactose-fermenting bacteria'?

<p>Pseudomonads do not ferment lactose, unlike lactose-fermenting bacteria (A)</p> Signup and view all the answers

Which statement accurately describes the process of determining antimicrobial susceptibility for a bacterial pathogen?

<p>Guidelines are followed to determine which specific bacterial isolates require susceptibility testing based on their clinical significance. (B)</p> Signup and view all the answers

Which of the following statements is true regarding the predictability of antimicrobial susceptibility patterns among different bacterial groups?

<p>Gram-negative bacilli, enterococci, and staphylococci often exhibit unpredictable susceptibility patterns, necessitating susceptibility testing. (C)</p> Signup and view all the answers

Which of the following methods is used to determine the minimum concentration of an antimicrobial agent required to inhibit the growth of a bacterial isolate?

<p>Broth dilution method (A)</p> Signup and view all the answers

In the disk-diffusion method for antimicrobial susceptibility testing, what does the absence of growth around a disk indicate?

<p>The microorganism is sensitive to the antimicrobial agent in the disk. (D)</p> Signup and view all the answers

Which organization publishes and regularly updates the standards for antimicrobial susceptibility testing methods used in clinical laboratories?

<p>Clinical and Laboratory Standards Institute (CLSI) (B)</p> Signup and view all the answers

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