Practical Medical Microbiology Lab Sterilization and Disinfection Quiz
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Questions and Answers

What is the main difference between sterilization and disinfection?

  • Sterilization and disinfection both use chemical solutions to eliminate most pathogenic microorganisms, but sterilization also kills bacterial spores
  • Sterilization only eliminates most pathogenic microorganisms but not bacterial spores, while disinfection kills all microorganisms, including bacterial spores
  • Sterilization and disinfection both kill all microorganisms, including bacterial spores, but sterilization is achieved by physical means and disinfection is achieved by chemical means
  • Sterilization kills all microorganisms, including bacterial spores, while disinfection eliminates most pathogenic microorganisms but not bacterial spores (correct)

    • Which of the following is an example of asepsis?

  • Applying antiseptics topically on animate surfaces
  • Lowering microbial counts in public settings to prevent transmission
  • Using bacteriocidal agents on inanimate objects
  • Absence of significant contamination (correct)

    • What distinguishes bacteriocidal agents from bacteriostatic agents?

  • Bacteriocidal agents and bacteriostatic agents both kill bacteria, including endospores, but bacteriocidal agents also inhibit the growth of bacteria
  • Bacteriocidal agents and bacteriostatic agents are both used to prevent infection on animate surfaces
  • Bacteriocidal agents only inhibit the growth of bacteria, while bacteriostatic agents kill bacteria, including endospores
  • Bacteriocidal agents kill bacteria, including endospores, while bacteriostatic agents inhibit the growth of bacteria but do not necessarily kill them (correct)

    • What does sepsis indicate in microbiology?

    <p>Bacterial contamination</p> Signup and view all the answers

    What is the purpose of sanitization in public settings?

    <p>To prevent transmission by lowering microbial counts to a safe level</p> Signup and view all the answers

    Which statement best describes antiseptics?

    <p>Agents that prevent infection by inhibiting the growth of microorganisms and can be applied topically on animate surfaces</p> Signup and view all the answers

    Which method is responsible for spontaneous sterilization in natural conditions?

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

    Which method is unreliable for sterilizing spores?

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

    What is the main purpose of filtration in microbiology?

    <p>Removing microorganisms from heat-sensitive solutions</p> Signup and view all the answers

    What type of radiation has greater capacity to induce lethal changes in the cell's genome (DNA)?

    <p>Ionizing rays</p> Signup and view all the answers

    Which dry heat method includes sterilization using a Bunsen flame till the article becomes red hot?

    <p>Red heat</p> Signup and view all the answers

    At what temperature is the holding method employed for pasteurization in the food and dairy industry?

    <p>$63C°$</p> Signup and view all the answers

    Which method is used to sterilize all glassware at high temperatures?

    <p>$180C°$/30 min</p> Signup and view all the answers

    What is the main action of moist heat on microorganisms?

    <p>Denaturation of proteins</p> Signup and view all the answers

    Which type of filtration is used for removing microorganisms from air?

    <p>Filtration using high efficiency particulate air filters</p> Signup and view all the answers

    What is the most common and excellent method for treating infectious waste in hospitals?

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

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