Name of the disease caused by a bacterium.

Options

A. Plague
B. Mumps
C. Dengue
D. Sleeping sickness

Answer

**Step-by-Step Solution:**

1. **Understand the Question**: The question asks for the name of a disease that is caused by a bacterium.

2. **Evaluate the Options**:
- **Option A**: Slipping sickness - This is caused by a parasite known as African trypanosomiasis, so it is not the correct answer.
- **Option B**: Dengue - This disease is caused by a virus, specifically the dengue virus, and is transmitted by mosquitoes. Therefore, it is not the correct answer.
- **Option C**: Mumps - Mumps is also a viral disease caused by the mumps virus, which belongs to the paramyxovirus family. Hence, this is not the correct answer either.
- **Option D**: Plague - Plague is a disease caused by the bacterium Yersinia pestis. This makes it a bacterial disease.

3. **Identify the Correct Answer**: After evaluating all the options, the only disease caused by a bacterium is plague, which is caused by Yersinia pestis.

4. **Conclusion**: The correct answer to the question is **plague**.