**Core Concept**
The question requires knowledge of the various pathogens transmitted by mosquitoes, which are a common vector for many infectious diseases. Mosquito-borne diseases can be caused by viruses, bacteria, protozoa, and parasites, and understanding the specific pathogens transmitted by mosquitoes is crucial for diagnosis and treatment.

**Why the Correct Answer is Right**
The correct answer will be a pathogen not transmitted by mosquitoes. This requires knowledge of the vector-borne diseases and their transmission routes. For example, Lyme disease is transmitted by ticks, not mosquitoes. Similarly, other pathogens like Chagas disease, caused by Trypanosoma cruzi, and Leishmaniasis, caused by Leishmania species, are transmitted by sandflies and other vectors, not mosquitoes.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option might be a mosquito-borne disease like Malaria (caused by Plasmodium species), Dengue fever (caused by Dengue virus), or Yellow fever (caused by Yellow fever virus), which are all transmitted by mosquitoes.
* **Option B:** This option might be a mosquito-borne disease like Zika virus disease, Chikungunya fever, or West Nile virus disease, which are also transmitted by mosquitoes.
* **Option C:** This option might be a mosquito-borne disease like Japanese encephalitis (caused by Japanese encephalitis virus) or Eastern equine encephalitis (caused by Eastern equine encephalitis virus), which are transmitted by mosquitoes.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that different vectors transmit different diseases, and understanding the specific vector-borne diseases is crucial for diagnosis and treatment. For example, if a patient presents with symptoms of fever, headache, and rash, and has a history of travel to an endemic area, it's essential to consider mosquito-borne diseases like Dengue fever or Zika virus disease in the differential diagnosis.

**Correct Answer: D. Lyme disease is transmitted by ticks, not mosquitoes.**