Herpes zoster multiply in:
First, the core concept here is the life cycle of Herpes zoster. I know that Herpes zoster, caused by VZV (Varicella-Zoster Virus), has a primary infection as chickenpox. After that, the virus becomes latent in sensory ganglia, like the dorsal root ganglia. Reactivation leads to shingles, right? So during reactivation, the virus travels along the sensory nerves to the skin, causing the rash.
The question is about where the virus multiplies. The primary multiplication would occur in the initial infection (chickenpox) in the skin's epithelial cells. But during reactivation (shingles), the virus reactivates from latency in the ganglia and then replicates in the skin. Wait, but does it multiply in the ganglia or in the skin? I think the multiplication happens in the skin during shingles. The ganglia are where it's latent. So when it reactivates, it moves to the skin and then multiplies there. So the correct answer would be the skin, perhaps the dorsal root ganglia for latency, but multiplication happens in the skin.
Looking at possible options, maybe the options include dorsal root ganglia, skin epithelial cells, etc. If the options were like A. Dorsal root ganglia B. Skin epithelial cells C. Lymph nodes D. Blood, then the correct answer would be B. Skin epithelial cells during reactivation. But since the options are missing, I have to make an educated guess. The core concept is that during primary infection, multiplication is in skin epithelial cells, leading to chickenpox. During reactivation, it's the skin again for shingles. The ganglia are sites of latency, not multiplication.
So the correct answer is likely the skin epithelial cells. Let me structure the explanation accordingly. The core concept is the replication sites of VZV during different phases. Why the correct answer is right: during primary infection, the virus replicates in epithelial cells, causing chickenpox. During reactivation (shingles), it reactivates from the ganglia and replicates in the skin epithelial cells again. The wrong options would be other sites like ganglia (latency), blood (viremia phase), or other tissues. The clinical pearl is to remember that the same virus causes chickenpox and shingles, with different replication sites in different phases.
**Core Concept** Herpes zoster, caused by varicella-zoster virus (VZV), reactivates from **dorsal root ganglia** where it remains latent after primary infection (chickenpox). During reactivation, the virus travels **centrifugally** along sensory nerves to the skin, where it replicates in **epithelial cells** to cause the characteristic dermatomal rash.
**Why the Correct Answer is Right** During reactivation (shingles), VZV exits latency in sensory ganglia and **replicates in skin epithelial cells**, leading to vesicular lesions. This replication is localized to the **dermis