Which is the causal agent for syphilis ?

Options

A. Haemophilus ducreyi
B. Treponema pallidum
C. Chlamydia trachomatis
D. All of the above

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the causal agent of syphilis. This means we need to identify the specific organism responsible for causing this disease.

2. **Reviewing the Options**: The options provided are:
- A) Haemophilus Ducre
- B) Treponema Pallidum
- C) Chlamydia Trachomatis
- D) All of the above

3. **Analyzing Each Option**:
- **Haemophilus Ducre**: This is a gram-negative bacterium that causes chancroid, which is characterized by genital ulcers. However, it is not the causal agent for syphilis.
- **Treponema Pallidum**: This is a spirochete bacterium specifically known to cause syphilis. It is the correct answer.
- **Chlamydia Trachomatis**: This bacterium causes chlamydia, another sexually transmitted infection, but it is not responsible for syphilis.
- **All of the Above**: This option suggests that all the listed organisms cause syphilis, which is incorrect.

4. **Selecting the Correct Answer**: Based on the analysis, the only organism that is the causal agent for syphilis is Treponema Pallidum.

5. **Final Answer**: The correct answer is **B) Treponema Pallidum**.

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