In the childhood immunization now days in DPT vaccine, one vaccine is removed due to its occurrence of large number of side effects, it is?

Appeared in: NORCET 3 - 2022 (Shift-2)

Explanation

The question refers to the modification of the DPT vaccine due to side effects.
The whole-cell Pertussis (wP) component was known to cause a higher frequency of adverse reactions compared to the Diphtheria and Tetanus components.
Common reactions included high fever, local swelling, and persistent crying.
More severe, though rare, complications like hypotonic-hyporesponsive episodes (HHE) and neurological issues were primarily attributed to the whole-cell pertussis component.
This led to the development and widespread adoption of the acellular Pertussis (aP) vaccine (DTaP), which has a much better safety profile.
Therefore, while not entirely 'removed', the pertussis component was significantly changed from whole-cell to acellular to reduce side effects.

Option A: The Tetanus component of the DPT vaccine is a toxoid, which is generally well-tolerated and was not the cause of the significant side effects that led to the vaccine's reformulation.
Option B: The Diphtheria component is also a toxoid. It is not associated with the high rate of adverse reactions that were linked to the pertussis component.
Option D: This is incorrect because the significant side effects were primarily associated with only one component, Pertussis, not all three.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain DPT vaccine components and associated side effects as background academic context rather than a clinical decision trigger.
Understanding the difference between DTwP and DTaP is crucial for nurses for parent counseling. Parents may have concerns about vaccine side effects, and explaining that the newer DTaP vaccine is safer can improve vaccine acceptance.
Nurses must be able to recognize and manage post-vaccination adverse events. For common reactions like fever and local pain, advising parents on using paracetamol and cold compresses is standard practice.
It is vital to identify red-flag symptoms post-vaccination, such as inconsolable crying for over 3 hours, HHE, or seizures, and ensure prompt reporting and referral as an Adverse Event Following Immunization (AEFI).

How to Approach the Question

First, identify the core of the question: it asks which part of the DPT vaccine was changed due to side effects.
Recall the full names for D, P, and T: Diphtheria, Pertussis, and Tetanus.
Access your knowledge about vaccine components. Diphtheria and Tetanus are toxoids, while Pertussis was originally a whole-cell vaccine.
Think about the history of vaccines and common reasons for reformulation. Side effect profiles are a major driver of vaccine development.
Differentiate the reactogenicity of the components. The whole-cell pertussis component is historically known for causing more reactions than the toxoid components.
Conclude that Pertussis is the component that was modified (from whole-cell to acellular) to reduce side effects, making it the correct answer.

Concept Tested & Keywords

QmxvxQF9ueIlGE9KzmDGQH

E6 Parks TextBook of Preventive & Social Medicine part 1 — Subpart A (pp 26-201 of 604) p. 165-167

E6 Microbiology Essentials Sastry 4e Part 2 p. 170-171

Practise the full NORCET 3 - 2022 (Shift-2)

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