The common route of transmission of Hepatitis-A is?

Appeared in: SJH Nursing Officer - 2019

Explanation

The most common mode of transmission for Hepatitis A Virus (HAV) is the feco-oral route.
This means the virus is shed in the feces of an infected person and spreads through the ingestion of contaminated food or water.
Common vehicles for transmission include food handled by an infected person with poor hand hygiene, contaminated drinking water, and raw shellfish from polluted waters.
Unlike Hepatitis B and C, HAV does not typically establish a chronic infection and is rarely transmitted through blood.

Option A: Transmission via blood transfusion is extremely rare for Hepatitis A because the viremic (virus in blood) phase is brief and there is no chronic carrier state.
Option C: While sexual transmission of Hepatitis A can occur, particularly through oral-anal contact, it is not considered the most common route of transmission for the general population.
Option D: Droplet transmission involves respiratory particles and is the mechanism for spreading illnesses like influenza, the common cold, and tuberculosis. Hepatitis A is an enteric virus and is not spread this way.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Infection Control and Prevention: Hepatitis A Transmission as background academic context rather than a clinical decision trigger.
Understanding the feco-oral route is critical for nursing practice, as it dictates the necessary precautions: contact precautions, meticulous hand hygiene, and patient education on food and water safety.
Nurses play a key role in preventing outbreaks by educating patients, families, and communities about the importance of handwashing, especially after using the bathroom and before preparing food.
Vaccination is a cornerstone of Hepatitis A prevention. Nurses should identify at-risk populations (e.g., travelers to endemic areas, food handlers, children in daycare) and advocate for vaccination.

How to Approach the Question

First, identify the core of the question: it asks for the 'common route' of transmission for a specific disease, 'Hepatitis-A'.
Recall the different types of hepatitis (A, B, C, D, E) and their primary modes of transmission. A useful mnemonic is: 'Hepatitis A and E come from the Feces' (Fecal-oral), while 'B, C, and D are from Blood and Body fluids'.
Evaluate each option based on this knowledge.
Option A (Blood transfusion) is primarily for B and C.
Option B (Feco-oral route) matches the mnemonic for Hepatitis A.
Option C (Sexual intercourse) is a major route for B, less common for A.

Concept Tested & Keywords

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E6 Parks TextBook of Preventive & Social Medicine part 1 — Subpart B (pp 202-403 of 604) p. 62-64

E6 Medicine Harrison 22e Part 2 p. 556-558

Practise the full SJH Nursing Officer - 2019

Attempt every question from this paper in a timed mock, then review the full solution for each one.