Which one is not spread by droplet infection?

Options

A. Tuberculosis
B. Diphteria
C. Pertussis
D. Gonorrhea

Answer

To determine which disease is not spread by droplet infection, we can analyze each option provided:

1. **Identify the diseases**: We have four diseases labeled A to D. Let's examine each one:
- **A: Tuberculosis (TB)**
- **B: Diphtheria**
- **C: Pertussis (Whooping Cough)**
- **D: Gonorrhea**

2. **Analyze the transmission of each disease**:
- **Tuberculosis (TB)**: This is caused by the bacterium Mycobacterium tuberculosis and is known to spread through airborne droplets when an infected person coughs or sneezes. Therefore, TB is spread by droplet infection.
- **Diphtheria**: This disease is caused by the bacterium Corynebacterium diphtheriae and is also transmitted through respiratory droplets when an infected person coughs or sneezes. Hence, diphtheria is also spread by droplet infection.
- **Pertussis (Whooping Cough)**: This is caused by the bacterium Bordetella pertussis and is transmitted in a similar manner through droplets from coughing or sneezing. Thus, pertussis is spread by droplet infection.
- **Gonorrhea**: This is a sexually transmitted disease (STD) caused by the bacterium Neisseria gonorrhoeae. It is primarily spread through sexual contact and can also be transmitted from mother to child during childbirth. Gonorrhea is not spread through airborne droplets.

3. **Conclusion**: Based on the analysis, the disease that is not spread by droplet infection is **Gonorrhea**.

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

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