In poultry , coccidiosis is caused by

Options

A. virus
B. fungus
C. helminth parasite
D. protozoan

Answer

### Step-by-Step Solution:

1. **Understanding Coccidiosis**: Coccidiosis is a disease that affects the intestinal tract of poultry, leading to symptoms such as bloody diarrhea and enteritis (inflammation of the intestines).

2. **Identifying the Cause**: The question asks about the causative agent of coccidiosis in poultry. It is important to differentiate between various types of pathogens, such as viruses, fungi, helminths (worms), and protozoa.

3. **Reviewing Pathogen Types**:
- **Viruses**: Cause various diseases in poultry, such as Newcastle disease, but are not responsible for coccidiosis.
- **Fungi**: Generally not known to cause coccidiosis.
- **Helminths**: These are parasitic worms and do not cause coccidiosis.
- **Protozoa**: These are single-celled organisms that can cause intestinal infections in birds.

4. **Identifying the Specific Protozoa**: The specific protozoan responsible for coccidiosis in poultry is **Eimeria**. This genus includes several species that infect different types of poultry.

5. **Conclusion**: Based on the information gathered, coccidiosis in poultry is caused by a protozoan, specifically **Eimeria**.

### Final Answer:
Coccidiosis in poultry is caused by **Protozoa**, specifically **Eimeria**.

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