Antemoem rabies diagnosis is commonly made by?
**Core Concept**
Ante-mortem rabies diagnosis is crucial for prompt treatment initiation and prevention of further transmission. The diagnosis relies on detecting the presence of the rabies virus or its antigens in the body, particularly in the central nervous system.
**Why the Correct Answer is Right**
The correct answer is based on the detection of the rabies virus or its antigens in the cerebrospinal fluid (CSF) using techniques such as direct fluorescent antibody (DFA) test or reverse transcription polymerase chain reaction (RT-PCR). These tests can identify the presence of the virus in the CSF, which is a strong indicator of rabies infection. The CSF is collected through a lumbar puncture, and the sample is then sent to a laboratory for analysis. The rapid detection of rabies in the CSF allows for timely treatment and reduces the risk of transmission to others.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as the diagnosis of rabies is not typically made by detecting the virus in the blood. While the virus may be present in the blood, it is not a reliable indicator of rabies infection.
**Option B:** This option is incorrect as the diagnosis of rabies is not typically made by detecting the virus in the saliva. While the virus may be present in the saliva, it is not a reliable indicator of rabies infection.
**Option C:** This option is incorrect as the diagnosis of rabies is not typically made by detecting the virus in the skin. While the virus may be present in the skin, it is not a reliable indicator of rabies infection.
**Clinical Pearl / High-Yield Fact**
It is essential to note that a history of exposure to a suspected rabid animal, combined with clinical symptoms such as hydrophobia, aggression, and confusion, is crucial for suspecting rabies. A prompt diagnosis is critical to prevent further transmission and ensure timely treatment.
**Correct Answer: C. Detection of the rabies virus or its antigens in the cerebrospinal fluid (CSF) using techniques such as direct fluorescent antibody (DFA) test or reverse transcription polymerase chain reaction (RT-PCR).**