Which is the most commonly used disinfectant for hospital surface cleaning?

RML PRE 2025

Applied Microbiology & Infection control

Easy

Appeared in: RML PRE 2025

Explanation

Sodium hypochlorite (household bleach) is recommended by health authorities like the CDC as a universal, broad-spectrum disinfectant.
It is inexpensive, fast-acting, and effective against a wide range of pathogens including bacteria, viruses, fungi, and spores.
Its ability to remove biofilms and its effectiveness in decontaminating blood spills make it the most common choice for general environmental surfaces in hospitals.

Option A: Phenol is highly corrosive, toxic, and has been largely replaced by safer, more effective agents for general surface cleaning. Its use is now restricted.
Option B: 70% alcohol evaporates too quickly from large surfaces to provide the necessary contact time for disinfection. It is also flammable and more expensive for large-scale use.
Option D: Hydrogen peroxide is generally used for high-level disinfection or sterilization of specific items or areas (like endoscopes or operation theaters), not for routine, daily cleaning of general hospital surfaces.

Clinical Relevance

Nursing practice connection: Knowing Hospital Infection Control and Disinfectants helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
Proper surface disinfection is a cornerstone of infection prevention, crucial for breaking the chain of transmission and preventing healthcare-associated infections (HAIs).
Nurses must know the correct disinfectant, dilution, and contact time for each situation to ensure efficacy and patient safety. Using the wrong agent can lead to disinfection failure.
What if the surface is contaminated with C. difficile spores? The answer remains sodium hypochlorite, as alcohol-based disinfectants are ineffective against C. difficile. This highlights the importance of choosing a sporicide for specific pathogens.

How to Approach the Question

First, identify the core of the question: it asks for the 'most commonly used' disinfectant for 'hospital surface cleaning'. This implies looking for an agent that is broad-spectrum, effective, and economical for large-scale use.
Evaluate each option based on its primary application in a hospital setting.
Recall that 70% alcohol is primarily a skin antiseptic and evaporates too quickly for surfaces.
Remember that phenol is largely historical and toxic, limiting its modern use.
Differentiate between routine surface cleaning and high-level disinfection. Hydrogen peroxide is used for the latter, making it less common for general surfaces.
Conclude that sodium hypochlorite (bleach) fits the criteria of a common, inexpensive, and effective surface disinfectant, making it the best answer.

Concept Tested & Keywords

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