Which of the following is not a bacterial disease ?

Options

A. Enteric fever
B. Jaundice
C. Bull neck disease
D. Lock jaw disease

Answer

To solve the question, "Which of the following is not a bacterial disease?", we will analyze each option provided.

### Step-by-Step Solution:

1. **Identify the Diseases**: We need to look at the options provided and identify what each disease is and its causative agent.

2. **Analyze Option 1 - Enteric Fever**:
- Enteric fever is commonly known as typhoid fever.
- It is caused by the bacterium *Salmonella typhi*.
- Conclusion: Enteric fever is a bacterial disease.

3. **Analyze Option 2 - Jaundice**:
- Jaundice is a condition characterized by yellowing of the skin and eyes.
- It is caused by liver infections, which can be due to viruses (like hepatitis A, B, C, D, and E) or parasites.
- Conclusion: Jaundice is not a bacterial disease.

4. **Analyze Option 3 - Bull Neck Disease**:
- Bull neck disease is another name for diphtheria.
- It is caused by the bacterium *Corynebacterium diphtheriae*.
- Conclusion: Bull neck disease is a bacterial disease.

5. **Analyze Option 4 - Lockjaw Disease**:
- Lockjaw is commonly known as tetanus.
- It is caused by the bacterium *Clostridium tetani*.
- Conclusion: Lockjaw disease is a bacterial disease.

6. **Final Conclusion**:
- From our analysis, we find that options 1 (Enteric fever), 3 (Bull neck disease), and 4 (Lockjaw disease) are all bacterial diseases.
- Option 2 (Jaundice) is not a bacterial disease.
- Therefore, the correct answer is **Option 2 - Jaundice**.