Which of the following is not a water borne disease?

MP CHO -2019 (Shift-2)

Applied Microbiology & Infection control

Easy

Appeared in: MP CHO -2019 (Shift-2)

Explanation

Tuberculosis (TB) is caused by the bacterium Mycobacterium tuberculosis.
Its primary mode of transmission is airborne, through the inhalation of respiratory droplets expelled by an infected person when they cough, sneeze, or talk.
Unlike the other options, TB is not transmitted through contaminated water or food, making it the correct answer.

Option A: Hepatitis A is a classic example of a water-borne disease. It is caused by the Hepatitis A virus (HAV) and spreads primarily through the fecal-oral route, often via contaminated water and food.
Option B: Typhoid fever, caused by the bacterium Salmonella Typhi, is transmitted through the ingestion of food or water contaminated with the feces of an infected person. It is a well-known water-borne illness.
Option C: Dysentery is an intestinal inflammation that causes bloody diarrhea. It can be caused by bacteria (like Shigella) or amoebas (Entamoeba histolytica), both of which are commonly spread through contaminated water and poor sanitation.

Clinical Relevance

Nursing practice connection: Knowing Modes of disease transmission, specifically differentiating between water-borne and airborne diseases helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
A nurse's understanding of transmission modes is fundamental to patient education and infection control. For water-borne diseases, nurses educate on water purification (boiling, chlorination), hand hygiene, and safe food handling.
For airborne diseases like TB, nursing interventions include placing the patient in a negative pressure room (if available), ensuring they wear a mask when outside the room, and teaching cough etiquette.
Patient safety is paramount. Incorrectly identifying the transmission route can lead to ineffective preventive measures and further spread of the disease within the community or a healthcare setting.

How to Approach the Question

First, identify the core concept of the question, which is 'water-borne disease'.
Next, note the negative keyword 'not'. This means you are looking for the option that does not fit the definition of a water-borne disease.
Evaluate each option one by one based on its primary mode of transmission.
Recall or deduce the transmission route for Hepatitis A (water/food), Typhoid fever (water/food), and Dysentery (water/food). These are all water-borne.
Recall the transmission route for Tuberculosis (airborne droplets).
The option that does not match the 'water-borne' criteria is Tuberculosis. Therefore, it is the correct answer.

Concept Tested & Keywords

Concept Tested: Modes of disease transmission, specifically differentiating between water-borne and airborne diseases.
Stem keywords: water borne disease
Lead-in keywords: not
Negative lead-in flag: The question asks to identify the disease that is NOT water-borne, requiring elimination of the options that are.

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