Lab Diagnosis of UTIs & Diagnostic Methods for Diarrheagenic E
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Questions and Answers

What color are the colonies of E. coli on blood agar?

  • Purple
  • Red
  • White
  • Gray (correct)

    • What is the gram stain result of E. coli?

  • Gram-positive
  • Gram-negative (correct)
  • Cannot be determined by gram staining
  • Gram-variable

    • What is the optimal growth temperature for E. coli?

  • 37°C (correct)
  • 45°C
  • 25°C
  • 30°C

    • What type of organism is E. coli in terms of oxygen requirements?

    <p>Facultative anaerobe</p> Signup and view all the answers

    On which culture media does E. coli produce moist colonies due to lactose fermentation?

    <p>MacConkey agar</p> Signup and view all the answers

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