Which factor is important when selecting a low- or intermediate-level disinfectant?

Contact time is a critical factor when selecting a low- or intermediate-level disinfectant because it determines how long the disinfectant needs to remain on the surface to effectively kill or inactivate pathogens. Proper contact time is essential for ensuring that the disinfectant has sufficient efficacy, as different microorganisms require varying amounts of time in the presence of the disinfectant to be eliminated.

For example, if a disinfectant is supposed to remain wet on the surface for a specified duration, failing to adhere to this guideline could result in incomplete disinfection, as the chemical agents may not have enough time to act on the microorganisms. Therefore, understanding and following the recommended contact time is key to achieving the desired level of infection control.

In contrast, factors such as cost, color, and origin might influence product selection for other reasons but do not directly impact the effectiveness of the disinfectant in killing pathogens.