The best method of decontamination of infectious waste before final disposal is:-

AIIMS Manglagiri NO - 2019

Applied Microbiology & Infection control

Easy

Appeared in: AIIMS Manglagiri NO - 2019

Explanation

Autoclaving, also known as wet thermal treatment, uses high-pressure saturated steam to achieve sterilization.
This method is highly effective at killing all forms of microorganisms, including bacteria, viruses, fungi, and even highly resistant spores.
It is an environmentally sound and preferred method for pre-disposal decontamination of most infectious wastes, such as soiled dressings, laboratory cultures, and sharps.
The Bio-Medical Waste Management Rules, 2016, specify autoclaving as a key treatment process for red and white category waste.

Option B: Shredding is a mechanical process for mutilation and volume reduction. It does not decontaminate waste; it is performed after the waste has already been sterilized by a method like autoclaving.
Option C: Incineration is a high-temperature final disposal method, not a pre-treatment for decontamination. While it does destroy pathogens, it is generally reserved for specific waste types like human anatomical waste and cytotoxic drugs, and it has significant environmental disadvantages, such as the emission of toxic gases.
Option D: Pulverization is a mechanical process used to reduce the size of particles. It is not a method for killing microorganisms or decontaminating infectious waste.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Biomedical Waste Management: Decontamination Methods as background academic context rather than a clinical decision trigger.
Proper decontamination of infectious waste is a cornerstone of hospital infection control, preventing the spread of nosocomial infections to healthcare workers, patients, and the community.
Nurses play a critical role in the first and most crucial step of waste management: proper segregation of waste at the point of generation into color-coded bags (e.g., red for contaminated recyclables, yellow for anatomical/soiled waste).
What if the waste includes cytotoxic drugs or radioactive materials? In that case, autoclaving is inappropriate. Cytotoxic waste must be incinerated at very high temperatures (greater than 1200°C) or encapsulated, while radioactive waste requires specialized handling and disposal according to radiological safety protocols.

How to Approach the Question

First, identify the key terms in the question: 'best method,' 'decontamination,' 'infectious waste,' and 'before final disposal.'
The question is asking for a pre-treatment step, not the final disposal itself.
Define the function of each option. Autoclaving sterilizes. Shredding and pulverization reduce size. Incineration destroys by burning.
Evaluate each option against the question's requirements. Shredding and pulverization do not decontaminate.
Compare autoclaving and incineration. Autoclaving is a decontamination pre-treatment. Incineration is a final disposal method. Therefore, for decontamination before final disposal, autoclaving is the best choice.

Concept Tested & Keywords

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E6 Parks TextBook of Preventive & Social Medicine part 2 — Subpart B (pp 233-449 of 464) pp. 107-109, 109-111