Mastering Microbial Control
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Questions and Answers

Which method of heat sterilization is preferred when sterilizing glassware to avoid any residual moisture that can contaminate the surface?

  • Autoclaving
  • Hot-air oven sterilization (correct)
  • Incineration
  • Boiling
  • What is the minimal time necessary for killing a population at a given temperature called?

  • Thermal death point
  • Dry heat
  • Decimal reduction time
  • Thermal death time (correct)
  • Which heat sterilization method kills bacteria by oxidizing cellular components?

  • Hot-air oven sterilization
  • Boiling
  • Incineration (correct)
  • Autoclaving
  • Which heat sterilization method is slower than moist heat?

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

    Which heat sterilization method requires long periods of exposure to high temperatures?

    <p>Hot-air oven sterilization</p> Signup and view all the answers

    Which heat sterilization method is preferred for metallic medical instruments?

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

    Which heat sterilization method kills bacteria by coagulating/denaturing proteins?

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

    Which heat sterilization method requires less energy than oxidation?

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

    Which heat sterilization method can be used at a lower temperature and shorter exposure time than dry heat?

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

    Which heat sterilization method is used for blankets, bedding, and utensils?

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

    Which method of microbial control involves the complete destruction/removal of all living microbes, spores, and viruses on an object or in an area?

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

    What is the term for an inanimate object that serves to transmit disease?

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

    Which type of microbial control method significantly reduces microbial numbers by using mild chemicals and gentle scrubbing of a small area of skin or tissue to avoid the transmission of pathogenic microbes?

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

    Which term refers to the application of chemicals for the removal of potential pathogens from living tissue?

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

    What is the term for a chemical that destroys bacteria?

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

    What is the term for a chemical that inhibits/prevents the growth of bacteria?

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

    What is the term for a chemical that destroys fungi?

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

    What is the term for a chemical that inhibits/prevents the growth of fungi?

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

    What is the term for a chemical that destroys viruses?

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

    What is the term for a chemical that destroys spores?

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

    Which method is commonly used for ultra pasteurization?

    <p>140oC for 3 seconds</p> Signup and view all the answers

    What is the temperature range for a freezer?

    <p>~-18oC</p> Signup and view all the answers

    Which method is used to remove microorganisms from a solution or gas?

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

    What is the purpose of salting in the process of desiccation?

    <p>To induce water diffusion</p> Signup and view all the answers

    What type of radiation is used to sterilize heat-sensitive pharmaceuticals?

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

    What is the most destructive wavelength of nonionizing radiation?

    <p>265nm</p> Signup and view all the answers

    What happens to DNA when it absorbs sufficient UV light?

    <p>It forms thymine dimers</p> Signup and view all the answers

    What is the main effect of microwaves on food?

    <p>To cook the food</p> Signup and view all the answers

    What is the purpose of filtration using a HEPA filter?

    <p>To trap microorganisms</p> Signup and view all the answers

    What is the purpose of membrane filtration?

    <p>To count the number of microorganisms in a solution</p> Signup and view all the answers

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