When antibodies are produced in one body and transferred to another body for protection against a disease, wh… - MP CHO -2021 (Shift 1st)

MP CHO -2021 (Shift 1st)

Microbiology

Easy

Appeared in: MP CHO -2021 (Shift 1st)

Explanation

Passive immunity is defined by the transfer of pre-formed antibodies from one individual to another, providing immediate protection.
The recipient's body does not produce its own antibodies, hence the term 'passive'.
This type of immunity provides rapid but temporary protection as the transferred antibodies are eventually broken down and are not replaced by the host's immune system.
A key feature is the absence of immunological memory, meaning the body will not have a faster, stronger response upon future exposure to the same pathogen.

Option A: Active immunity involves the body producing its own antibodies after exposure to an antigen (e.g., through infection or vaccination), not receiving them from another source.
Option B: Herd immunity is a population-level concept, describing indirect protection for non-immune individuals when a high percentage of the community is immune. It is not a type of individual immunity.
Option D: Cellular immunity is mediated by T-lymphocytes and other immune cells, not by antibodies. The question specifically mentions the transfer of antibodies.

Clinical Relevance

Nursing practice connection: Knowing Types of Immunity helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
Passive immunization is a critical nursing intervention for post-exposure prophylaxis. For example, administering rabies immunoglobulin to a person bitten by a potentially rabid animal provides immediate antibodies to neutralize the virus while their body begins to mount its own active response to the rabies vaccine.
Nurses play a key role in educating new mothers about the benefits of breastfeeding, which includes providing natural passive immunity to the infant through antibodies in colostrum and breast milk, protecting them from common infections.
What if? If a patient is immunocompromised and cannot mount an effective active immune response (e.g., due to chemotherapy), passive immunization with immunoglobulins (IVIG) becomes the primary method to provide protection against various infections.

How to Approach the Question

First, carefully read the question and identify the core concept. The question asks about the transfer of pre-made antibodies from one body to another.
Analyze the keywords: 'antibodies produced in one body' and 'transferred to another'. This immediately points to a process where the recipient is receiving protection passively, without their own immune system doing the work.
Evaluate the options based on this core concept.
Option A, 'Active Immunity,' is the opposite; 'active' implies the body is actively making its own antibodies.
Option B, 'Herd Immunity,' relates to community protection, not individual antibody transfer.
Option C, 'Passive Immunity,' perfectly matches the description of receiving 'passive' or ready-made protection.

Concept Tested & Keywords

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