Elsevier

Ophthalmology

Volume 105, Issue 7, 1 July 1998, Pages 1323-1330
Ophthalmology

Detection of varicella zoster virus DNA and viral antigen in human eyes after herpes zoster ophthalmicus1

https://doi.org/10.1016/S0161-6420(98)97042-7Get rights and content

Abstract

Objective

The purpose of the study was to identify varicella zoster virus (VZV) DNA and viral antigen in human eyes at various intervals after clinical onset of herpes zoster ophthalmicus (HZO).

Design

A retrospective case series.

Participants

There were 9 eyes and 4 corneal buttons surgically obtained from 13 patients with HZO at the University Eye Hospital of Erlangen-Nürnberg between 1984 and 1994. Specimens were examined at different timepoints after clinical onset of HZO (range, 1 day-19 years; median, 36 months).

Methods

Histopathologic evaluation was performed on formalin-fixed and paraffin-embedded tissue by routine histology, immunohistochemistry (5-B-7 murine monoclonal antibody to VZV; peroxidase-antiperoxidase method), and DNA-in situ hybridization (35S deoxyadenosine triphosphate-labeled HindIII fragments [A and C] of VZV).

Results

Typical histopathologic changes associated with HZO were identified: vascularization of the corneal stroma (11 of 13), granulomatous reaction to Descemet’s membrane (8 of 13), fusiform-shaped ciliary scarring (5 of 9), optic neuritis (4 of 9), and perineuritis (8 of 9) and perivasculitis (8 of 9) of the long posterior ciliary nerves and arteries. VZV antigen was detected in two patients with acute infection 1 and 7 days after onset of HZO, respectively. VZV-DNA was identified in seven patients up to 10 years after onset of HZO in corneal epithelial cells (2 of 13), corneal stroma (5 of 13), inflammatory infiltrate of the anterior chamber (1 of 9), episclera (2 of 9), posterior ciliary nerves (1 of 9) and arteries (5 of 9), optic nerve (5 of 9), and adjacent leptomeninges (2 of 9).

Conclusion

Persistence of viral genomes, most likely accompanied by gene expression or slow viral replication, appears to be responsible for the often smoldering panophthalmitis and the chronic recurrent keratouveitis in patients with HZO. Localization of viral DNA in vascular structures suggests a role for vasculitis in the pathogenesis of some ocular findings associated with HZO.

Section snippets

Patients

Nine surgically enucleated eyes and four corneal buttons obtained after penetrating keratoplasty were studied from 13 patients who had a clinical diagnosis of HZO. The study included seven female and six male patients ranging in age from 19 to 86 years (median, 75 years). The interval between clinical onset of HZO and surgery varied from 1 day to 19 years (median, 36 months). Two patients (patients 1 and 2; Table 1) showed the clinical features of acute HZO 1 and 7 days after clinical onset,

Histopathologic analysis

The previously reported typical pattern of histopathologic changes in HZO16, 17 was confirmed in our series (Table 1). Major changes in the anterior segment of the eye included vascular corneal scarring (11 of 13) (Fig 2), granulomatous reaction to Descemet’s membrane (9 of 13) (Fig 2), and trabeculitis (8 of 9) (Fig 3). All eyes were diagnosed with a chronic nongranulomatous scleritis and episcleritis in combination with the typical segmental necrosis of iris stroma and anterior part of the

Discussion

Although the histopathologic features of HZO are well described,16, 17, 20, 21 the details of the pathogenesis and the pathomechanism of different ocular manifestations still are uncertain. The mechanism of a “smoldering” VZV infection with progressive destruction of the eye is discussed with special frequency. Some authors implicate different immunoreactions17 against inactive viral antigens or persisting viral replication,22 whereas others favor nerve damage,10 direct cytopathic effects of

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