Herpes zoster infection can lead to ?
**Core Concept**
Herpes zoster, also known as shingles, is a viral infection caused by the reactivation of the varicella-zoster virus (VZV), which is the same virus that causes chickenpox. This reactivation occurs when the latent VZV is reactivated from the dorsal root ganglia, leading to a localized dermatomal rash and pain.
**Why the Correct Answer is Right**
The reactivation of VZV in the dorsal root ganglia leads to the production of new viral particles, which then travel down the nerve fibers to the skin, causing the characteristic rash of herpes zoster. This process is mediated by the axonal transport of viral particles and the activation of viral genes, which leads to the production of viral proteins and the replication of the virus. The rash typically appears in a dermatomal distribution, corresponding to the affected nerve root.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is not a known complication of herpes zoster infection. While herpes zoster can cause significant morbidity, it does not typically lead to this condition.
**Option B:** This option is not a direct complication of herpes zoster infection. While the virus can cause significant pain, it does not typically lead to this condition.
**Option C:** This option is a known complication of herpes zoster infection. Postherpetic neuralgia (PHN) is a common complication of herpes zoster, characterized by persistent pain that lasts for more than 30 days after the onset of the rash.
**Clinical Pearl / High-Yield Fact**
A memorable fact about herpes zoster is that it typically affects individuals over the age of 50, and the risk of developing postherpetic neuralgia increases with age.
**Correct Answer:** C. Postherpetic neuralgia.