A previously vaccinated healthcare worker (HCW) sustains a needle-stick injury from a Hepatitis B surface antigen (HBsAg)–positive patient. The HCW is a known non-responder. What should be done next?

Appeared in: INI-CET EXAM -2025

Explanation

A 'non-responder' to the Hepatitis B vaccine fails to produce adequate protective antibodies (anti-HBs < 10 mIU/mL) and is considered susceptible to infection.
For a non-responder exposed to a known HBsAg-positive source, passive immunization is required to provide immediate protection.
The standard protocol is to administer two doses of Hepatitis B Immunoglobulin (HBIG).
The first dose is given immediately, and the second dose is given one month (4 weeks) later to ensure prolonged passive immunity throughout the virus's incubation period.

Option A: This protocol (one dose of HBIG and a full vaccine series) is the standard recommendation for an unvaccinated person, not a known non-responder.
Option B: Taking no action is incorrect and dangerous. The HCW is a non-responder, meaning they have no protection against the virus and have had a significant exposure.
Option D: Administering two doses of HBIG immediately is not the correct protocol. The purpose of the second dose is to extend protection over time, not to double the initial dose.

Visual 1: Flowchart: A flowchart illustrating the decision-making process for Hepatitis B post-exposure prophylaxis based on the source's HBsAg status and the exposed person's vaccination and antibody response status.
Visual 2: Infographic: An infographic summarizing the different categories of Hepatitis B vaccine response (responder, non-responder, inadequate responder) and the corresponding management.

Clinical Relevance

Nursing practice connection: Use the key finding related to Hepatitis B Post-Exposure Prophylaxis (PEP) to guide bedside assessment, documentation, and the next nursing action.
Understanding the correct PEP protocol is a critical patient safety and occupational health competency for all healthcare workers to prevent the transmission of blood-borne pathogens.
It is essential for institutions to maintain clear records of HCWs' vaccination status and antibody responses to ensure correct and rapid management following an exposure.
What if the source patient's HBsAg status was unknown? In that case, the source patient should be tested for HBsAg immediately. The HCW would not typically receive HBIG unless the source is a high-risk individual, but initiating the vaccine series might be considered pending the source's test results.

How to Approach the Question

First, identify the key clinical details in the scenario: the disease (Hepatitis B), the type of exposure (needle-stick), the source's status (HBsAg-positive), and the exposed person's status (vaccinated but a known non-responder).
Recognize that 'non-responder' is the most critical piece of information. This means the person is not immune despite prior vaccination.
Recall the principles of post-exposure prophylaxis: it can involve active immunization (vaccine) or passive immunization (immunoglobulin), or both.
Evaluate the options based on the specific needs of a non-responder. Since they cannot mount their own rapid immune response, they need immediate passive protection.
Compare the options for administering passive protection (HBIG). The correct protocol involves a timed second dose to extend immunity, not giving two doses at once or combining it with a vaccine series in this specific case (as the primary action).

Concept Tested & Keywords

Concept Tested: Hepatitis B Post-Exposure Prophylaxis (PEP)
Stem keywords: Hepatitis B, needle-stick injury, HBsAg-positive, healthcare worker, non-responder
Lead-in keywords: what should be done next
Clinical cues: The HCW is a 'known non-responder', which is the critical factor determining the management plan.

QKKhynOdc70Z_aIyG8aUDK

Practise the full INI-CET EXAM -2025

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