## **Core Concept**
Negri bodies are characteristic pathological features associated with **rabies**, a viral infection caused by the rabies virus. They are primarily found in the **neurons** of infected individuals. The presence of Negri bodies is a diagnostic hallmark for rabies.

## **Why the Correct Answer is Right**
Negri bodies are mainly found in the **neurons** of the brain, particularly in the **hippocampus**, **cerebellum**, and **cerebral cortex**. These inclusions are a result of the rabies virus infection, which leads to the accumulation of viral antigens within the neurons. The identification of Negri bodies in brain tissue is a definitive diagnostic criterion for rabies.

## **Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because Negri bodies are not typically associated with liver cells or liver tissue.
* **Option B:** This option is incorrect because, although Negri bodies could potentially be found in various parts of the nervous system, the most accurate and specific answer is neurons.
* **Option C:** This option is incorrect because Negri bodies are not characteristically found in muscle cells.

## **Clinical Pearl / High-Yield Fact**
A key clinical pearl is that Negri bodies are not only diagnostic for rabies but are also found in a high percentage of cases, particularly in the early stages of the disease. Their presence can be confirmed through **immunofluorescence** or **electron microscopy**. A classic exam trap is to assume that a diagnosis of rabies can be made solely based on clinical symptoms; however, laboratory confirmation, often through the identification of Negri bodies, is essential.

## **Correct Answer:** D. Neurons.