The elimination of pathogens or other substances from a spoiled implement or surface; there are at least three levels of decontamination, the most effective being sterilization, then disinfection, and the lowest level, sanitization.Click to see full answer. Likewise, people ask, what are the 3 stages of decontamination?There are three levels of decontamination: cleaning, disinfection and sterilization.Additionally, what are the four methods of decontamination? Methods. There are 4 main categories of physical and chemical means of decontamination: (1) heat; (2) liquid disinfection; (3) vapors and gases; and (4) radiation. Each category is discussed below. what are the three levels of cleaning that take place in healthcare facilities? Disinfection Versus Sterilization There are three levels of disinfection: high, intermediate, and low. The high-level disinfection (HLD) process kills all vegetative microorganisms, mycobacteria, lipid and nonlipid viruses, fungal spores, and some bacterial spores.What is the first level of physical decontamination?The first level is cleaning. Cleaning must be performed before the object can be disinfected or sterilized, but an object does not have to go through a separate disinfection process in order for it to be sterilized.