Which one is incorrect match ?

Options

A. Xenopsylla-Plague
B. Pediculus-Typhoid
C. Culex-Malaria
D. Stegomyia-Yellow Fever.

Answer

To determine which match is incorrect among the given options, we need to analyze each option based on the known vectors for the respective diseases.

### Step-by-Step Solution:

1. **Analyze the First Option: Genopocella - Plague**
- The disease plague is caused by the bacterium Yersinia pestis and is primarily transmitted by fleas, particularly from rodents.
- **Conclusion:** This match is incorrect as Genopocella is not a recognized vector for plague.

2. **Analyze the Second Option: Pediculis - Typhoid**
- Typhoid fever is caused by the bacterium Salmonella typhi, and it is primarily transmitted through contaminated food and water, not by lice (Pediculis).
- **Conclusion:** This match is also incorrect as Pediculis is not a vector for typhoid.

3. **Analyze the Third Option: Culex - Malaria**
- Malaria is caused by the Plasmodium species and is transmitted by the bite of infected female Anopheles mosquitoes, not Culex mosquitoes.
- **Conclusion:** This match is incorrect as Culex is not the vector for malaria.

4. **Analyze the Fourth Option: Stegomyia - Yellow Fever**
- Yellow fever is transmitted by the Aedes aegypti mosquito, which is sometimes referred to as Stegomyia.
- **Conclusion:** This match is correct as Stegomyia is indeed a vector for yellow fever.

### Final Conclusion:
The incorrect matches are:
- Genopocella - Plague
- Pediculis - Typhoid
- Culex - Malaria

However, the question specifically asks for one incorrect match, and based on the analysis, the most notable incorrect match is **Culex - Malaria**.

### Answer:
The incorrect match is **Culex - Malaria**.

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