Herpes Zoster Clinical Presentation and Management

Clinical Characteristics

The American College of Physicians notes that herpes zoster typically presents with prodromal pain that precedes the rash by 24-72 hours, often described as burning, stabbing, or aching in the affected dermatome 1, 2
The disease is characterized by a unilateral vesicular eruption strictly respecting the midline, following the dermatomal distribution 2
Lesion progression occurs from erythematous macules to papules, then vesicles that may coalesce and eventually crust over 1, 2
The duration of new lesion eruption in immunocompetent patients is typically 4-6 days, with a total disease course of approximately 2 weeks 1, 2

The Centers for Disease Control and Prevention recommends that clinical diagnosis is usually sufficient in immunocompetent patients with typical presentation, but laboratory confirmation is needed for immunocompromised patients or atypical cases 5
PCR testing of vesicle fluid is the gold standard with nearly 100% sensitivity and specificity 3, 6
Serology is not useful for diagnosis of active shingles 3, 6

The Infectious Diseases Society of America suggests that treatment should be initiated immediately upon clinical suspicion, without waiting for laboratory confirmation 3, 6
For immunocompetent patients, oral valacyclovir or famciclovir are preferred over acyclovir due to superior bioavailability and less frequent dosing 3, 6, 5
For immunocompromised patients, high-dose intravenous acyclovir is the treatment of choice 1, 5

The American Gastroenterological Association recommends screening for VZV IgG antibody status at IBD diagnosis, and seronegative patients should receive two doses of varicella vaccine at least 3 weeks before starting immunomodulators 4, 7
The Centers for Disease Control and Prevention recommends the recombinant zoster vaccine (Shingrix) for prevention in adults ≥50 years and immunocompromised patients 1, 5