Anti-tetanus serum (ATS), is an example of

Options

A. artificial passive immunity
B. natural passive immunity
C. artifical active immunity
D. natural active immunity

Answer

**Step-by-Step Solution:**

1. **Understanding Anti-Tetanus Serum (ATS):**
- Anti-Tetanus Serum is a medical preparation used to prevent and treat tetanus. It contains antibodies that neutralize the toxin produced by the tetanus bacteria.

2. **Source of Antibodies:**
- The antibodies in ATS are derived from the blood of equines (horses). These animals are immunized against the tetanus toxin, and their blood is then collected to extract the antibodies.

3. **Definition of Passive Immunity:**
- Passive immunity refers to the transfer of antibodies from one organism to another. This can occur naturally (e.g., maternal antibodies passed to a baby) or artificially (e.g., through serum injections).

4. **Classification of ATS:**
- Since the antibodies in ATS are extracted from another organism (equines) and administered to a person, it falls under the category of artificial passive immunity. This is because the recipient does not produce the antibodies themselves; they receive them from an external source.

5. **Conclusion:**
- Therefore, Anti-Tetanus Serum is an example of artificial passive immunity.

**Final Answer:**
Anti-Tetanus Serum (ATS) is an example of artificial passive immunity.

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