Identify the incorrectly matched pair

Options

A. Sleeping sickness - Trypanosoma gambience
B. Dengue fever - Arbovirus
C. Plague - Yersinia pestis
D. Syphilis- Bacillus anthracis

Answer

To identify the incorrectly matched pair from the given options, we will analyze each pair provided in the question.

### Step-by-Step Solution:

1. **Analyze the First Pair: Sleeping Sickness and Trypanosoma gambiense**
- Sleeping sickness is indeed caused by the parasite Trypanosoma gambiense, which is transmitted by the tsetse fly.
- **Conclusion**: This pair is correctly matched.

2. **Analyze the Second Pair: Dengue Fever and Arbovirus**
- Dengue fever is caused by the dengue virus, which is classified as an arbovirus. It is transmitted by the Aedes mosquito.
- **Conclusion**: This pair is correctly matched.

3. **Analyze the Third Pair: Plague and Yersinia pestis**
- Plague is caused by the bacterium Yersinia pestis. It is known for causing severe outbreaks historically referred to as the Black Death.
- **Conclusion**: This pair is correctly matched.

4. **Analyze the Fourth Pair: Syphilis and Bacillus anthracis**
- Syphilis is a sexually transmitted disease caused by the bacterium Treponema pallidum. Bacillus anthracis, on the other hand, causes anthrax, which primarily affects animals.
- **Conclusion**: This pair is incorrectly matched because it associates syphilis with Bacillus anthracis instead of Treponema pallidum.

### Final Answer:
The incorrectly matched pair is **Syphilis with Bacillus anthracis**.

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