Tetanus toxoid is an example of

IGNOU PB Bsc Entrance-2022

Applied Microbiology & Infection control

Easy

Appeared in: IGNOU PB Bsc Entrance-2022

Explanation

Tetanus toxoid is a vaccine containing an inactivated bacterial toxin that is no longer harmful but remains antigenic.
When injected, the toxoid stimulates the individual's own immune system to produce specific antibodies and memory cells.
This process, where the body actively creates its own defense in response to an antigen, is the definition of active immunity.
Because it is induced via a vaccine, it is specifically termed 'artificially acquired active immunity', which provides long-lasting protection.

Option B: Passive immunity involves receiving pre-formed antibodies from an external source, rather than the body producing its own. The body is a passive recipient.
Option C: Natural immunity is acquired through non-deliberate means, such as recovering from an actual infection (natural active) or from mother to child (natural passive). Vaccination is a deliberate, artificial process.
Option D: Herd immunity is a population-level concept, not a type of individual immunity. It describes the indirect protection of unvaccinated individuals when a large percentage of the population is immune.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Classification of immunity types, specifically active immunity as background academic context rather than a clinical decision trigger.
Nurses are responsible for administering tetanus toxoid vaccines and educating patients on the importance of maintaining up-to-date immunizations, including booster shots typically every 10 years.
Understanding the difference between active immunity (from the toxoid) and passive immunity (from immunoglobulin) is critical for providing appropriate post-exposure prophylaxis for tetanus-prone wounds.
What if? If a patient with an unknown vaccination history presents with a deep, contaminated wound, the nurse should anticipate orders for both Tetanus Toxoid (to build long-term active immunity) and Tetanus Immunoglobulin (TIG) (for immediate passive protection).

How to Approach the Question

First, identify the key term in the question: 'Tetanus toxoid'.
Recall the definition of a toxoid: it is a modified bacterial toxin that has been made non-toxic but can still stimulate an immune response.
Analyze the phrase 'stimulate an immune response'. This implies the body is actively involved in creating its own defense.
Evaluate the options based on this understanding. 'Active immunity' directly matches the process where the body produces its own antibodies.
Eliminate the other options: 'Passive' means receiving ready-made antibodies. 'Natural' implies acquisition through infection or from the mother, not a vaccine. 'Herd' is a population-level concept, not an individual one.

Concept Tested & Keywords

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