A patient presents with a vesicular rash in a dermatomal distribution that does not cross the midline. The causative agent is a double-stranded DNA virus that remains latent in dorsal root ganglia after primary infection. Which virus is responsible for this condition?

The correct answer to the question "A patient presents with a vesicular rash in a dermatomal distribution that does not cross the midline. The causative agent is a double-stranded DNA virus that remains latent in dorsal root ganglia after primary infection. Which virus is responsible for this condition?" is Option B: Varicella-Zoster Virus (VZV).

The other options — A) Herpes Simplex Virus Type 1 (HSV-1), C) Human Papillomavirus (HPV), D) Cytomegalovirus (CMV) — are incorrect for this USMLE Exam Prep question. As explained above: Varicella-Zoster Virus (VZV) causes chickenpox (primary infection) and subsequently establishes latency in dorsal root ganglia. Reactivation leads to herpes zoster (shingles), characterized by a pain…