Micro Lecture Quiz 2 Flashcards
Difference between Sterilizing, disinfecting, degerming, sanitizing, antiseptic and how to recognize them.
The process of filtration is a(n)
ANS: Sterilizing method
Which of the following is a sterilizing agent?
ANS: Peracetic acid
Washing dishes in the dishwasher with detergent and hot water is a ____ process.
ANS: Disinfecting
Characteristics of disinfectants.
Which of the following statements is true of disinfectants?
ANS: They are used on inanimate surfaces
Disinfectants that damage membranes include
ANS: both alcohol and phenolics
Recognizing the action of Sanitation, means.
You notice a sign in a public restroom that states “sanitized for your safety.” This means
ANS: methods of disinfection that meet minimum standards of microbial removal have been used.
What is pasteurization, types and how is it attained
Which of the following is an example of pasteurization?
ANS: Heat is used to kill potential pathogens in apple juice.
Meaning of Aseptic, asepsis, in various scenarios
Aseptic means
ANS: Free of pathogens
Viral meningitis is also called “aseptic meningitis”
ANS: to indicate no bacteria are involved
What are the methods of microbial control? Meaning of antiseptic, sanitizing, microbicidal , degerming, microbiostatic.
Methods of microbial control are called ____ arrest the growth of microbes.
ANS: Microbistatic
Antiseptic: Substance that prevents infection by killing or inhibiting pathogens on living tissues.
Sanitizing: Process that reduces the microbial population to a safe level.
Microbicidal: Agents that kill microbes.
Degerming: Removal of microbes from an area.
Microbiostatic: Agents that inhibit the growth of microbes.
What is an antimicrobial agent, types and their targets.
Antimicrobial agents that damage nucleic acids also affect
ANS: Protein synthesis
Effect of chemical agents that dissolve lipids on various types of microbes.
A chemical agent that dissolves lipids can damage
ANS: Cells and enveloped viruses
Which microbes or their products are more difficult to eradicate or destroy
Which of the following is the most difficult to inactivate?
ANS: low-level germicide
What are the condition of temp and time to attain pasteurization in the various types?
Which of the following describes flash pasteurization?
ANS: Heating at 72 C for 15 seconds
HTST: 72°C for 15 seconds.
UHT: 135°C for 2-5 seconds.
Silver and other heavy metals are used for microbial control, how does it (Ag) work?
Silvadene, a topical treatment for burns, contains 1% silver. What category of chemical control agent is Silvadene?
ANS: Heavy metals
Silver ions (Ag+) bind to bacterial cell walls and membranes, disrupting their functions and causing cell death.
How does ethanol with a concentration of > 70 % work? What microbes can be eliminated with it? And which cannot.
Seventy percent alcohol is effective against
ANS: Enveloped viruses
Ethanol disrupts cell membranes and denatures proteins, effective against most bacteria, fungi, and many viruses but less effective against bacterial spores and some viruses.
What are disinfecting agents, types and what is their action?
Quaternary ammonium compounds are disinfectants against
ANS: enveloped viruses
Disinfecting agents naturally produced by microorganisms are
ANS: Antibiotics
Chemical agents used to kill or inhibit microorganisms on inanimate objects. Types include alcohols, phenols, aldehydes, and quaternary ammonium compounds.
A chemical agent that kills pathogenic microbes.
A chemical agent that kills pathogenic microbes in general is a(n)
ANS: Germicide
Bactericidal agents like bleach and hydrogen peroxide can effectively kill pathogenic microbes.
What is an ideal antimicrobial agent and what it not ideal
Which of the following is NOT a desirable characteristic of an ideal antimicrobial agent?
ANS: It only arrests growth of vegetative cells.
