Haemophilus ducryei causes

Options

A. AIDS
B. Gonorrhoea
C. Chancroid
D. Syphillis

Answer

**Step-by-Step Solution:**

1. **Identify the Bacteria**: The question asks about Haemophilus ducreyi, which is a specific type of bacteria.

2. **Characterize the Bacteria**: Haemophilus ducreyi is a gram-negative bacterium. This means it has a specific cell wall structure that can be identified using a Gram stain.

3. **Determine the Disease Caused**: Haemophilus ducreyi is known to cause a disease called chancroid. This is a sexually transmitted disease (STD).

4. **Describe the Symptoms**: Chancroid is characterized by painful sores or ulcers in the genital area. This symptom is a key feature that helps in identifying the disease.

5. **Evaluate the Options**: The options given are AIDS, gonorrhea, chancroid, and syphilis.
- **AIDS** is caused by the HIV virus, so it is incorrect.
- **Gonorrhea** is caused by Neisseria gonorrhoeae, so it is also incorrect.
- **Syphilis** is caused by Treponema pallidum, making it incorrect as well.
- **Chancroid** is the correct answer since it is caused by Haemophilus ducreyi.

6. **Conclusion**: Therefore, the correct answer to the question is that Haemophilus ducreyi causes chancroid.

**Final Answer**: Chancroid

---