Which one is not spread by droplet infection?

Options

A. Tuberculosis
B. Diptheria
C. Pertusis
D. Gonoorrhea

Answer

To determine which disease is not spread by droplet infection, we will analyze each of the provided options based on the definition of droplet infection.

### Step-by-Step Solution:

1. **Understand Droplet Infection**:
- Droplet infection is defined as an infection transmitted through airborne droplets of saliva or sputum that contain infectious organisms. This means that if a person with an infectious disease coughs or sneezes, the droplets can carry the pathogens to another person.

2. **Analyze Each Option**:
- **Option A: Tuberculosis (TB)**:
- Tuberculosis is caused by the bacterium Mycobacterium tuberculosis. It is known to be spread through airborne droplets when an infected person coughs or sneezes. Therefore, TB is spread by droplet infection.

- **Option B: Diphtheria**:
- Diphtheria is caused by the bacterium Corynebacterium diphtheriae. Similar to TB, it can also be transmitted through droplets from an infected person's respiratory secretions. Thus, diphtheria is also spread by droplet infection.

- **Option C: Pertussis (Whooping Cough)**:
- Pertussis is caused by Bordetella pertussis and is transmitted through respiratory droplets. Hence, pertussis is another example of a disease spread by droplet infection.

- **Option D: Gonorrhea**:
- Gonorrhea is a sexually transmitted disease caused by the bacterium Neisseria gonorrhoeae. It is primarily spread through sexual contact and is not transmitted through respiratory droplets. Therefore, gonorrhea is not spread by droplet infection.

3. **Conclusion**:
- After analyzing all options, it is clear that the disease that is not spread by droplet infection is **Gonorrhea**.

### Final Answer:
**Gonorrhea is not spread by droplet infection.**

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