Which of the following disease is caused by a protozoan Eimeria in fowls resulting in bloody diarrhoea?

Options

A. Fowl cholera
B. Coccidiosis
C. Thrush
D. Ranikhet

Answer

**Step-by-Step Solution:**

1. **Identify the Disease in Question**: The question asks for a disease caused by the protozoan Eimeria in fowls that results in bloody diarrhea.

2. **Review the Options Provided**: The options given are:
- A) Fowl cholera
- B) Coccidiosis
- C) Thrush
- D) Trunicate

3. **Analyze Each Option**:
- **Fowl Cholera**: This is caused by the bacterium Pasteurella multocida, not a protozoan. Therefore, it is incorrect.
- **Coccidiosis**: This disease is indeed caused by protozoa of the genus Eimeria and is known to affect the intestinal tract of birds, leading to bloody diarrhea. Thus, this option is likely correct.
- **Thrush**: This is a fungal infection caused by Candida albicans, not a protozoan disease. Hence, it is incorrect.
- **Trunicate**: This is caused by a virus, specifically the paramyxovirus, and does not relate to protozoan infections. Therefore, it is also incorrect.

4. **Conclusion**: Based on the analysis, the disease caused by the protozoan Eimeria in fowls resulting in bloody diarrhea is **Coccidiosis**.

5. **Final Answer**: The correct option is **B) Coccidiosis**.

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