Rice water stool is a characteristic symptom of:

RIMS Nursing Officer - 2022

Medical & Surgical Nursing

Easy

Appeared in: RIMS Nursing Officer - 2022

Explanation

Rice-water stool is the pathognomonic (hallmark) sign of cholera, an infection caused by the bacterium Vibrio cholerae.
The cholera toxin causes intestinal cells to secrete massive amounts of fluid and electrolytes, resulting in profuse, watery diarrhea.
The stool is described as pale and milky with flecks of mucus, resembling the water left after washing rice.
This rapid fluid loss, which can exceed one liter per hour, leads to severe dehydration, electrolyte imbalance, and potentially fatal hypovolemic shock if not treated promptly.

Option A: Malaria is a parasitic disease transmitted by mosquitoes. Its classic symptoms are cycles of fever, chills, and sweating. While gastrointestinal symptoms can occur, they are not the primary feature, and the stool is not rice-water in character.
Option B: Diphtheria is a bacterial infection affecting the mucous membranes of the nose and throat. Its hallmark sign is a thick, gray, adherent pseudomembrane covering the throat and tonsils, which can cause breathing difficulties.
Option D: Chicken pox is a highly contagious viral infection caused by the varicella-zoster virus. Its characteristic sign is an itchy rash that progresses from macules to papules and then to vesicular lesions (blisters) before crusting over.

Clinical Relevance

Nursing practice connection: Knowing Pathognomonic Signs of Infectious Diseases helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
Recognizing rice-water stool is a critical nursing assessment skill that should immediately raise suspicion for cholera. This allows for prompt initiation of life-saving rehydration therapy, which is the cornerstone of cholera management.
Failure to quickly identify and treat the severe dehydration associated with cholera can lead to hypovolemic shock, acute kidney injury, and death within hours.
What if? If the patient's stool was described as containing blood and pus (dysentery), the primary suspicion would shift from cholera to invasive bacterial pathogens like Shigella, Campylobacter, or enteroinvasive E. coli. Management would then focus more on identifying the specific pathogen and targeted antibiotic therapy.

How to Approach the Question

First, identify the key clinical sign presented in the question stem, which is 'Rice water stool'.
Recognize this as a pathognomonic sign, meaning it is specifically characteristic of a particular disease.
Systematically review the options provided, recalling the hallmark symptom of each disease.
Match the sign 'rice water stool' to its corresponding disease, Cholera.
Eliminate the other options by confirming their primary symptoms are different: Malaria (fever/chills), Diphtheria (throat pseudomembrane), and Chicken pox (vesicular rash).

Concept Tested & Keywords

Qx9ujYfI50vzybm3mUMwG5

E6 Nelson Textbook of Pediatrics(2024) — Volume 1 p. 1791-1793

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