Chages' fever is caused by

Options

A. Trypanosoma cruzi
B. Trypanosoma gambiense
C. Trypanosoma brucei
D. Trypanosoma vivax.

Answer

### Step-by-Step Solution:

1. **Understanding Chagas' Fever**:
- Chagas' fever is a disease that affects humans and is primarily found in certain regions of Central and South America. It is important to know the symptoms and the causative agent of the disease.

2. **Identifying the Causative Agent**:
- Chagas' fever is caused by a parasite. The specific organism responsible for this disease is a protozoan.

3. **Recognizing the Protozoan**:
- The protozoan that causes Chagas' fever is known as *Trypanosoma cruzi*. This organism is transmitted to humans through the bite of an infected triatomine bug, also known as the "kissing bug."

4. **Confirming the Symptoms**:
- Common symptoms of Chagas' fever include fever, fatigue, body aches, rash, and in some cases, swelling at the site of the bite. Chronic symptoms can affect the heart and digestive system.

5. **Conclusion**:
- Based on the information gathered, the causative agent of Chagas' fever is confirmed to be *Trypanosoma cruzi*.

### Final Answer:
Chagas' fever is caused by *Trypanosoma cruzi*.

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