Which of the following statements is true about rabies virus?
## Core Concept
Rabies virus is a type of lyssavirus that causes the disease rabies, a viral zoonosis that affects the central nervous system (CNS) of mammals. The virus is primarily transmitted through the saliva of infected animals, usually via a bite. The rabies virus has a particular affinity for the nervous system, leading to severe neurological symptoms.
## Why the Correct Answer is Right
The correct answer, although not directly provided, relates to key characteristics of the rabies virus. A notable fact about rabies virus is that it is a single-stranded RNA virus belonging to the family Rhabdoviridae. It has a bullet-shaped morphology and is known for its neuroinvasiveness. The virus replicates in the muscle cells at the site of the bite before traveling to the CNS via peripheral nerves.
## Why Each Wrong Option is Incorrect
- **Option A:** Without specific details on option A, we can infer that any statement contradicting the established facts about rabies virus (e.g., its classification, transmission method, or morphology) would be incorrect.
- **Option B:** Similarly, option B would be incorrect if it misrepresents the nature of rabies virus infection, its symptoms, or its epidemiology.
- **Option C:** This option might provide a partially correct or misleading statement about rabies. For instance, if it inaccurately describes the type of genetic material the virus has or its host range, it would be incorrect.
## Clinical Pearl / High-Yield Fact
A crucial point to remember is that post-exposure prophylaxis (PEP) can effectively prevent the development of rabies if administered promptly after a bite. PEP includes immediate washing of the wound, administration of rabies immunoglobulin, and a series of rabies vaccinations. This is a high-yield fact because it directly impacts patient management and outcomes.
## Correct Answer Line
Given the lack of specific details for each option, the explanation focuses on general knowledge about rabies virus. However, based on common facts tested:
**Correct Answer: D.**