Which agent is described as a disinfectant that is a volatile gas and toxic, capable of killing all but prions?

Which agent is described as a disinfectant that is a volatile gas and toxic, capable of killing all but prions?

• A. Alcohols
• B. Chlorine
• C. Aldehydes
• D. Hydrogen Peroxide

Answer: (C)

Aldehydes are known for their strong, broad-spectrum antimicrobial activity and their ability to inactivate a wide range of pathogens through cross-linking of proteins and nucleic acids. Formaldehyde, a volatile gas at room temperature, and related aldehydes like glutaraldehyde are highly toxic and used as powerful disinfectants and sterilants when handling equipment that can’t withstand heat. This combination—volatile and toxic, with broad efficacy against bacteria, fungi, viruses, and spores—fits the description of an agent that disinfects broadly but does not reliably inactivate prions, which are unusually resistant to most chemical disinfectants. Alcohols, chlorine compounds, and hydrogen peroxide each have different properties and limitations. They are not characterized primarily as volatile gases with the same broad sterilant spectrum that aldehydes provide, and their effectiveness against spores or prions differs, making aldehydes the best match for the given description.

Aldehydes are known for their strong, broad-spectrum antimicrobial activity and their ability to inactivate a wide range of pathogens through cross-linking of proteins and nucleic acids. Formaldehyde, a volatile gas at room temperature, and related aldehydes like glutaraldehyde are highly toxic and used as powerful disinfectants and sterilants when handling equipment that can’t withstand heat. This combination—volatile and toxic, with broad efficacy against bacteria, fungi, viruses, and spores—fits the description of an agent that disinfects broadly but does not reliably inactivate prions, which are unusually resistant to most chemical disinfectants.

Alcohols, chlorine compounds, and hydrogen peroxide each have different properties and limitations. They are not characterized primarily as volatile gases with the same broad sterilant spectrum that aldehydes provide, and their effectiveness against spores or prions differs, making aldehydes the best match for the given description.