What is the difference between a persistent and non-persistent agent in general terms?

• A. Persistent agents remain on surfaces longer and require longer decon times; non-persistent agents dissipate more quickly and may require shorter decon or no residue.
• B. Persistent agents dissipate more quickly; non-persistent stay longer.
• C. Both types require identical decon times.
• D. Only cleaners can remove them.

Answer: (A)

Persistence describes how long an agent remains active on surfaces and in the environment. Persistent agents cling to materials, degrade slowly, and can pose a contamination risk for longer periods, so decontamination needs are longer and more thorough, often with residues that require additional cleaning steps. Non-persistent agents are more volatile and evaporate quickly, so they tend to leave little or no residue and decontamination can be shorter or even unnecessary beyond initial cleanup. This is why the best answer explains that persistent agents stay on surfaces longer and require longer decon, while non-persistent agents dissipate faster and may require shorter decon or no residue. The other statements don’t fit because they misstate how persistence affects dissipation, decon times, or removal.