Cat scratch disease is characterized by?
**Core Concept**
Cat scratch disease (CSD) is a bacterial infection caused by Bartonella henselae, typically acquired through scratches or bites from infected cats. It is characterized by a distinctive clinical presentation and histopathological findings.
**Why the Correct Answer is Right**
The correct answer is a manifestation of the disease. Cat scratch disease typically presents with a combination of symptoms including a papule or pustule at the site of the scratch, regional lymphadenopathy, and systemic symptoms such as fever and malaise. The disease is caused by the bacterium Bartonella henselae, which infects the lymph nodes and causes an inflammatory response. The correct answer is a key component of this inflammatory response.
**Option A:**
* Incorrect because while fever is a common symptom of cat scratch disease, it is not the primary characteristic of the disease.
**Option B:**
* Incorrect because while lymphadenopathy is a key feature of cat scratch disease, the specific histopathological finding is not as characteristic as the correct answer.
**Option C:**
* Incorrect because while a papule or pustule at the site of the scratch is a common presentation of cat scratch disease, it is not as specific or characteristic as the correct answer.
**Clinical Pearl / High-Yield Fact**
The clinical presentation of cat scratch disease can be remembered using the mnemonic "PALS": papule or pustule, lymphadenopathy, and systemic symptoms (fever, malaise).
**Correct Answer: C. Lymphadenopathy**