A community health nurse is conducting an awareness session. Which factor would the nurse highlight as a major reason for the re-emergence of diseases like diphtheria?

Appeared in: NORCET-1

Explanation

Diphtheria is a classic example of a vaccine-preventable disease, primarily controlled through widespread immunization with the diphtheria toxoid vaccine.
A 'relaxation in immunization practices' refers to a decline in vaccination rates within a population.
This decline reduces 'herd immunity,' the indirect protection that occurs when a large percentage of a population is immune, making it difficult for a disease to spread.
When herd immunity falls below a critical threshold, the number of susceptible individuals increases, allowing pathogens like Corynebacterium diphtheriae to circulate again and cause outbreaks.
Historical evidence from outbreaks in the former Soviet Union and other regions confirms that decreased childhood immunization rates are a primary driver of diphtheria's re-emergence.

Option A: Improved sanitation is a key public health measure that helps prevent the spread of infectious diseases, particularly those that are waterborne or foodborne. It would lead to a decrease, not a re-emergence, of such diseases.
Option B: The primary issue with diphtheria re-emergence is a failure of prevention (vaccination), not a failure of treatment (antibiotics). While antibiotic resistance is a major global health problem, it is not the main driver for the return of a disease so effectively controlled by a vaccine.
Option D: Decreased international travel would limit the geographic spread of pathogens. It is the rapid and extensive increase in global travel that is recognized as a major factor in the swift dissemination of emerging and re-emerging diseases worldwide.

Clinical Relevance

Nursing practice connection: Knowing Factors contributing to the re-emergence of vaccine-preventable diseases helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
A community health nurse's primary role includes health education and promotion, with a strong focus on the importance of routine immunization.
Nurses must be able to clearly explain to families and communities that vaccination is the safest and most effective way to prevent diseases like diphtheria.
This knowledge is crucial for addressing vaccine hesitancy and correcting misinformation, thereby maintaining high immunization coverage and protecting the community.

How to Approach the Question

First, identify the core concept of the question, which is the 're-emergence' of a disease.
Next, identify the specific disease mentioned: 'diphtheria'.
Recall the key characteristics of diphtheria. The most important fact is that it is a vaccine-preventable disease.
Evaluate each option based on this key fact. The most logical reason for a vaccine-preventable disease to re-emerge is a failure or relaxation in the vaccination program.
Eliminate the other options by considering their logical impact. Improved sanitation and decreased travel would prevent, not cause, disease spread. Antibiotics are related to treatment, not primary prevention through immunization.

Concept Tested & Keywords

Concept Tested: Factors contributing to the re-emergence of vaccine-preventable diseases.
Stem keywords: community health nurse, re-emergence of diseases, diphtheria
Lead-in keywords: major reason
Clinical cues: The care setting changes urgency, monitoring level, and the expected nursing action.
Negative lead-in flag: false

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E6 Parks TextBook of Preventive & Social Medicine part 1 — Subpart A (pp 26-201 of 604) p. 163-165

E6 Parks TextBook of Preventive & Social Medicine part 1 — Subpart C (pp 404-604 of 604) p. 21-23

Practise the full NORCET-1

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