Multiple Choice
Which link in the chain of infection is primarily broken by the use of personal protective equipment (PPE)?
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1. Introduction to Microbiology
Introduction to Microbiology
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Which of the following chemical agents would be ineffective against bacterial endospores?
A
Alcohol-based disinfectants
B
Glutaraldehyde
C
Ethylene oxide gas
D
Chlorine bleach
Verified step by step guidance1
Understand that bacterial endospores are highly resistant structures formed by some bacteria to survive extreme conditions, including chemical disinfectants.
Review the mode of action of each chemical agent: Alcohol-based disinfectants typically denature proteins and disrupt membranes but are generally ineffective against the tough protective layers of endospores.
Glutaraldehyde is a high-level disinfectant that can penetrate and inactivate endospores by cross-linking proteins and nucleic acids.
Ethylene oxide gas is a sterilizing agent that can penetrate endospores and disrupt DNA and proteins, effectively killing them.
Chlorine bleach is a strong oxidizing agent that can destroy endospores by damaging cellular components through oxidation.
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