RUHS, Jaipur, M.Sc Nursing Entrance Exam-2015
Child Health Nursing (Pediatrics)
Medium
A child with a severe primary immunodeficiency is due for vaccinations. Which vaccine is strictly contraindicated for this child?
Appeared in: RUHS, Jaipur, M.Sc Nursing Entrance Exam-2015
Explanation
- The Measles, Mumps, Rubella (MMR) vaccine is a live attenuated vaccine.
- Live attenuated vaccines contain a weakened form of the living virus.
- In individuals with severe immunodeficiency, the immune system cannot mount an effective response, allowing the weakened virus to replicate and cause a severe, life-threatening infection.
- Therefore, live vaccines like MMR are strictly contraindicated in this patient population.
Why Other Options Were Wrong
- Option A: The DTaP vaccine is not a live vaccine. It is a combination of toxoids (diphtheria, tetanus) and acellular pertussis components, which are inactivated parts of the bacteria. It is safe for immunocompromised individuals.
- Option B: The Inactivated Poliovirus (IPV) vaccine contains a killed version of the virus. Because the virus is not live, it cannot replicate or cause disease, making it safe for children with immunodeficiency.
- Option D: The Hepatitis B vaccine is a recombinant subunit vaccine. It contains only a single protein from the virus (HBsAg) and no live viral components. It is safe for immunocompromised patients.
Related Visual
Clinical Relevance
- Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Vaccine contraindications in immunodeficiency as background academic context rather than a clinical decision trigger.
- A nurse's primary responsibility before administering any vaccine is to screen for contraindications and precautions. This includes asking about allergies, previous reactions, and underlying health conditions like immunodeficiency.
- Administering a live vaccine to a severely immunocompromised child is a critical medical error that can lead to severe infection and death. This highlights the importance of thorough patient history assessment.
- What if? If the child had a less severe immunodeficiency, such as an isolated IgA deficiency, or was HIV-positive but not severely immunocompromised (based on CD4 counts), the MMR vaccine might be considered. The decision would be based on a careful risk-benefit analysis by a specialist.
How to Approach the Question
- First, identify the key clinical information in the question stem: the patient is a child with 'severe primary immunodeficiency'.
- Next, understand the core of the question: which vaccine is 'strictly contraindicated'?
- Recall the different types of vaccines and their mechanisms. The most important distinction here is between live and non-live (inactivated, toxoid, subunit) vaccines.
- Apply the rule: Live attenuated vaccines are contraindicated in severely immunocompromised individuals because of the risk of the weakened pathogen causing disease.
- Evaluate each option: Classify DTaP, IPV, MMR, and HepB. Identify that MMR is the only live attenuated vaccine among the choices.
- Conclude that MMR is the vaccine that is strictly contraindicated for this child.
Concept Tested & Keywords
- Concept Tested: Vaccine contraindications in immunodeficiency
- Stem keywords: child, severe primary immunodeficiency, vaccinations, contraindicated
- Lead-in keywords: strictly contraindicated
- Clinical cues: The patient's diagnosis of 'severe primary immunodeficiency' is the key factor determining vaccine safety.
Question ID
Qt6xhWIpotb4qfGlE_I5ur
Reference Book
E6 Ghai Essential Pediatrics(pp 26-904 of 913) p. 215-217
E6 Nelson Textbook of Pediatrics(2024) — Volume 1 pp. 1610-1612, 1601-1603
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