Bubonic plague is transmitted by

Options

A. Aedes
B. Xenopsylla
C. Cockroach
D. Anopheles

Answer

To solve the question "Bubonic plague is transmitted by," we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Disease**:
- Bubonic plague is a serious infectious disease caused by the bacterium *Yersinia pestis*.

2. **Identify Symptoms**:
- The symptoms of bubonic plague include swollen and tender lymph glands, which are referred to as "buboes." This is how the disease gets its name.

3. **Determine Transmission Method**:
- Bubonic plague is primarily transmitted to humans through the bite of infected fleas.

4. **Identify the Flea**:
- The specific flea responsible for transmitting bubonic plague is known as the rat flea, scientifically named *Xenopsylla cheopis*.

5. **Evaluate the Options**:
- The options given are:
- a. Aedes (a genus of mosquitoes)
- b. Xenopsylla (the correct answer)
- c. Cockroach (not a vector for this disease)
- d. Anopheles (another genus of mosquitoes)
- Based on our understanding, the correct answer is option b, *Xenopsylla*.

6. **Conclusion**:
- Therefore, the bubonic plague is transmitted by the flea *Xenopsylla cheopis*.

### Final Answer:
Bubonic plague is transmitted by **Xenopsylla** (option B).

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