The most important and frequent mode of transmission of nosocomial infection is?

KPSC Staff Nurse - 2017

Applied Microbiology & Infection control

Easy

Appeared in: KPSC Staff Nurse - 2017

Explanation

Contact transmission is the most common and important route for spreading nosocomial (hospital-acquired) infections.
This occurs either through direct person-to-person contact or, more frequently, indirect contact via the contaminated hands of healthcare workers.
Healthcare workers' hands can touch multiple patients and contaminated surfaces (like bed rails or equipment), easily transferring pathogens from one place to another.

Option B: This mode involves tiny particles that remain suspended in the air for long periods and is responsible for fewer nosocomial infections compared to contact.
Option C: This involves larger respiratory droplets that travel short distances (e.g., less than 6 feet) and do not remain suspended in the air. It is less frequent than contact transmission for overall healthcare-associated infections (HAIs).
Option D: This involves transmission through contaminated items like food, water, blood, or medications. While it can cause significant outbreaks, it is not the most frequent day-to-day mode of transmission for all nosocomial infections combined.

Clinical Relevance

Nursing practice connection: Knowing Modes of transmission for nosocomial infections helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
Understanding that contact is the main route of transmission reinforces that hand hygiene is the single most effective measure to prevent HAIs.
Nurses must diligently practice the '5 Moments for Hand Hygiene' to break the chain of infection: before touching a patient, before a clean/aseptic procedure, after body fluid exposure risk, after touching a patient, and after touching patient surroundings.
What if? If a patient is known to have an infection spread by contact (e.g., MRSA or C. difficile), Contact Precautions (gown and gloves) must be implemented in addition to standard hand hygiene to prevent transmission.

How to Approach the Question

First, identify the keywords in the question: 'most important', 'frequent', 'nosocomial infection', and 'mode of transmission'.
This is a factual recall question asking for the most common pathway for hospital-acquired infections.
Define each of the four transmission modes provided in the options.
Consider the daily activities in a hospital setting. Healthcare workers move from patient to patient and touch many surfaces, making their hands a primary vector.
Based on this, conclude that contact transmission is the most frequent route compared to airborne, droplet, or vehicle-borne transmission for the overall number of HAIs.

Concept Tested & Keywords

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