Which one of the following pairs is not correctly matched?

Options

A. 1)Trichomoniasis - Trichuris trichiura
B. 2)Sleeping sickness - Trypanosoma gambiense
C. 3)Dengue fever - arbovirus
D. 4)Plague - Yersinia pestis

Answer

To determine which pair is not correctly matched, we will analyze each option provided in the question.

### Step 1: Analyze the first pair - Trichomoniasis with Trichurus trichura
- **Trichomoniasis** is a sexually transmitted disease caused by the protozoan parasite **Trichomonas vaginalis**.
- **Trichurus trichura**, also known as the human whipworm, is a type of roundworm that causes a different disease called **trichuriasis**.
- Since Trichomoniasis is caused by Trichomonas vaginalis and not by Trichurus trichura, this pair is **not correctly matched**.

### Step 2: Analyze the second pair - Sleeping sickness with Trypanosoma gambiense
- **Sleeping sickness** is caused by the protozoan parasite **Trypanosoma gambiense** (and also Trypanosoma brucei).
- This pair is correctly matched as sleeping sickness is indeed associated with Trypanosoma gambiense.

### Step 3: Analyze the third pair - Dengue fever with Arbovirus
- **Dengue fever** is caused by the **Dengue virus**, which is classified as an **arbovirus** (arthropod-borne virus).
- This pair is also correctly matched, as dengue fever is a well-known arboviral disease.

### Step 4: Analyze the fourth pair - Plague with Yersinia pestis
- **Plague** is caused by the bacterium **Yersinia pestis**.
- This pair is correctly matched since Yersinia pestis is the causative agent of plague.

### Conclusion
After analyzing all the pairs, we find that the first pair (Trichomoniasis with Trichurus trichura) is not correctly matched. Therefore, the answer to the question is:

**Correct Answer: Trichomoniasis with Trichurus trichura**

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