All of the following are true about Lymes disease except:
**Core Concept**
Lyme disease is a tick-borne zoonotic infection caused by the spirochete *Borrelia burgdorferi*. It is characterized by a characteristic skin rash, fever, headache, and joint pain.
**Why the Correct Answer is Right**
The correct answer is related to the pathophysiology of Lyme disease. The disease is caused by the bacterium *Borrelia burgdorferi*, which is transmitted to humans through the bite of an infected blacklegged tick (*Ixodes scapularis*). The bacteria invade the skin, joints, and nervous system, causing a range of symptoms.
**Why Each Wrong Option is Incorrect**
**Option A:** This statement is true. Lyme disease is indeed caused by the bacterium *Borrelia burgdorferi*.
* **Option B:** This statement is also true. The characteristic skin rash of Lyme disease, known as erythema migrans, is a hallmark of the disease.
* **Option C:** This statement is true. Lyme disease can cause joint pain and swelling, particularly in the knees.
* **Option D:** This statement is false. Lyme disease is not caused by a virus, but rather by the bacterium *Borrelia burgdorferi*.
**Clinical Pearl / High-Yield Fact**
Lyme disease can be treated with antibiotics, but early diagnosis is crucial to prevent long-term complications. A characteristic "bull's-eye" rash is a common symptom of the disease.
**Correct Answer:** D. Lyme disease is not caused by a virus.