A major cattle viral disease is

Options

A. brucellosis
B. foot and mouth disease
C. ringworm
D. None of the above

Answer

To answer the question "A major cattle viral disease is," we will analyze the options provided and identify the correct one step by step.

### Step 1: Evaluate the Options
The options given are:
1. Brucellosis
2. Foot and Mouth Disease
3. Ringworm
4. None of the above

### Step 2: Analyze Brucellosis
- Brucellosis is a disease caused by bacteria, specifically the genus Brucella.
- It primarily affects animals and can be transmitted to humans through unpasteurized dairy products.
- Since it is a bacterial disease, it is not the correct answer to the question about a viral disease.

**Hint:** Look for diseases caused by viruses, not bacteria.

### Step 3: Analyze Foot and Mouth Disease
- Foot and Mouth Disease (FMD) is a highly contagious viral disease that affects cloven-hoofed animals, including cattle.
- The causative agent of FMD is the Picornavirus.
- Since this is a viral disease and is significant in cattle, it fits the criteria of the question.

**Hint:** Identify the disease that is specifically viral and affects cattle.

### Step 4: Analyze Ringworm
- Ringworm is a fungal infection that affects the skin.
- It is not a viral disease and is primarily a concern in humans and animals but not classified under viral diseases.
- Therefore, it is not the correct answer.

**Hint:** Remember that ringworm is caused by fungi, not viruses.

### Step 5: Conclusion
Based on the analysis of the options:
- The correct answer to the question "A major cattle viral disease is" is **Foot and Mouth Disease**.

**Final Answer:** Foot and Mouth Disease