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Questions and Answers
Which chemical is used for hand washing?
Which chemical is used for hand washing?
- Flavine
- Iodine
- Methylated spirit (correct)
- Hydrogen peroxide
Which process involves eliminating all pathogenic organisms?
Which process involves eliminating all pathogenic organisms?
- Boiling
- Sterilization (correct)
- Pasteurization
- Disinfection
Which method is used for the sterilization of disposable syringes?
Which method is used for the sterilization of disposable syringes?
- Infra-red irradiation (correct)
- Filtration
- Ultraviolet radiation
- Moist heat/steam
What is the effect of cold on microorganisms?
What is the effect of cold on microorganisms?
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What is the primary purpose of filtration in the context of disinfection and sterilization?
What is the primary purpose of filtration in the context of disinfection and sterilization?
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What type of heat is used for incineration?
What type of heat is used for incineration?
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Which chemical has no effect on Gram negative organisms?
Which chemical has no effect on Gram negative organisms?
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What is the purpose of using gases such as ethylene oxide in sterilization?
What is the purpose of using gases such as ethylene oxide in sterilization?
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Study Notes
Disinfection and Sterilization
- Soap is commonly used for hand washing
Sterilization Methods
- Autoclaving involves eliminating all pathogenic organisms
- Ethylene oxide gas is used for the sterilization of disposable syringes and heat-sensitive materials
Effects of Temperature on Microorganisms
- Cold has a negligible effect on microorganisms, only slowing down their growth
Filtration
- The primary purpose of filtration is to remove microorganisms and other contaminants from liquids
Incineration
- Dry heat is used for incineration
Chemical Disinfectants
- Chlorhexidine has no effect on Gram-negative organisms
Gas Sterilization
- Gases such as ethylene oxide are used for sterilization, particularly for heat-sensitive materials
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