All of the following about Tetanus are true, EXCEPT:

UPUMS Nsg officer-2023

Microbiology

Medium

Appeared in: UPUMS Nsg officer-2023

Explanation

Herd immunity does not apply to tetanus because the disease is not transmitted from person to person.
Infection occurs from environmental exposure to Clostridium tetani spores, typically through contaminated wounds.
Since an unvaccinated individual cannot be protected by the vaccination of others, personal immunization is the only way to acquire protection.

Option B: This statement alludes to a correct principle of post-exposure prophylaxis. For significant or contaminated wounds, a tetanus booster is indeed recommended if the last dose was more than 5 years ago.
Option C: This is a correct statement. The causative agent, Clostridium tetani, exists as highly resistant spores found globally in soil and dust, creating a permanent environmental reservoir that cannot be eliminated.
Option D: This is a correct statement. It is the official target set by the World Health Organization (WHO) to define the 'elimination' of maternal and neonatal tetanus (MNT) as a public health problem.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Epidemiology and prevention of Tetanus as background academic context rather than a clinical decision trigger.
Understanding that herd immunity doesn't exist for tetanus reinforces the critical importance of individual vaccination and maintaining up-to-date boosters for all patients, regardless of community vaccination rates.
Nurses play a key role in wound assessment and management, including determining the need for post-exposure tetanus prophylaxis based on the wound type and the patient's vaccination history.
What if a patient with an unknown vaccination history presents with a deep, contaminated puncture wound? The protocol would be to administer both Tetanus Immune Globulin (TIG) for immediate passive immunity and a tetanus toxoid-containing vaccine to start building active immunity.

How to Approach the Question

First, recognize the keyword 'EXCEPT'. This signals that three of the options are true statements about tetanus, and your task is to find the one false statement.
Evaluate each option based on your knowledge of infectious diseases.
Consider Option A: 'Herd immunity'. Recall that herd immunity applies to contagious diseases spread between people. Tetanus is acquired from the environment (soil), not from other people. This makes the statement fundamentally incorrect for tetanus.
Review the other options. 'Cannot be eradicated' is logical for a soil-based organism. The 5-year booster rule and the elimination rate are specific public health facts that are likely correct.
Conclude that the statement about herd immunity is the only one that is definitively false, making it the correct answer to the 'EXCEPT' question.

Concept Tested & Keywords

Concept Tested: Epidemiology and prevention of Tetanus
Stem keywords: Tetanus, true
Lead-in keywords: EXCEPT
Negative lead-in flag: The question asks for the exception, meaning you must identify the FALSE statement among the options.

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E6 Parks TextBook of Preventive & Social Medicine part 1 — Subpart B (pp 202-403 of 604) p. 175-177

E6 Medicine Harrison 22e Part 1 p. 1271-1273