The most common identified viral pathogen that causes diarrhea?

Appeared in: IGNOU Post B. SC. Nursing entrance-2019

Explanation

Rotavirus is a virus and is recognized as the leading cause of severe, dehydrating gastroenteritis in infants and children worldwide.
Before the widespread use of the rotavirus vaccine, nearly every child was infected by the age of five.
Transmission is primarily fecal-oral, and the virus is highly contagious, spreading easily in settings like daycare centers.
The question specifically asks for a 'viral' pathogen, making Rotavirus the correct choice among the options provided.

Option A: Giardia is a protozoan parasite, not a virus. It causes a different type of diarrhea, often chronic and associated with malabsorption.
Option C: Salmonella is a bacterium, not a virus. It is a common cause of foodborne bacterial gastroenteritis.
Option D: Shigella is a bacterium, not a virus. It is known for causing bacillary dysentery, which is characterized by bloody and mucoid stools.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Etiology of Infectious Diarrhea as background academic context rather than a clinical decision trigger.
Nurses must differentiate the cause of diarrhea to guide care. Viral diarrhea is managed with supportive care (hydration), while bacterial infections may sometimes require antibiotics.
Patient and family education on vaccination is a key nursing role. Promoting the rotavirus vaccine is a critical public health intervention to prevent severe disease.
Strict hand hygiene and contact precautions are essential nursing interventions to prevent the nosocomial spread of rotavirus in healthcare settings.

How to Approach the Question

First, identify the key terms in the question: 'most common' and 'viral pathogen'.
The term 'viral' is the most critical filter. Systematically evaluate each option to determine its classification.
Classify Giardia as a protozoan, eliminating it.
Classify Salmonella and Shigella as bacteria, eliminating them.
This leaves Rotavirus as the only viral pathogen among the choices.
Confirm with your knowledge that Rotavirus is indeed a very common cause of pediatric diarrhea, making it the correct answer.

Concept Tested & Keywords

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E6 Nelson Textbook of Pediatrics(2024) — Volume 2 p. 137-139

E6 Parks TextBook of Preventive & Social Medicine part 1 — Subpart B (pp 202-403 of 604) p. 78-80

E6 Pathology- ROBBINS & COTRAN PATHOLOGIC BASIS OF DISEASE 10TH Ed p. 796-798

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