Viral conjunctivitis

Viral conjunctivitis, commonly known as pink eye, is an inflammation of the conjunctiva—the thin, transparent membrane that lines the white surface of the eye and the inner eyelid. The condition derives its colloquial name from the characteristic pink or reddish discoloration of the affected eye. Among infectious causes of conjunctivitis in adults, viral etiologies predominate, with adenoviruses identified as the responsible pathogen in approximately 65 to 90 percent of viral cases.

The clinical presentation of viral conjunctivitis typically includes redness of the eye, excessive tearing, and a watery discharge, though the discharge is not invariably watery. Patients may experience pain, burning sensation, scratchiness, or itching in the affected eye. The condition commonly begins in one eye and may spread to the contralateral eye. Associated findings may include pre-auricular lymph node swelling and, when the cornea is involved, eye pain. The infection frequently occurs in conjunction with symptoms of upper respiratory tract infection, common cold, or sore throat.

Viral conjunctivitis accounts for approximately 80 percent of conjunctivitis cases in adults, in contrast to children among whom bacterial causes predominate. The condition represents a substantial burden in primary care and ophthalmology practice due to its high prevalence and contagious nature. Outbreaks frequently occur in settings involving close personal contact, including schools, daycare facilities, and healthcare environments. Seasonal variation in incidence has been observed, though source-backed detail on specific temporal patterns is not yet available.

Viral conjunctivitis spreads readily among individuals through direct contact with infectious ocular secretions or contaminated surfaces. The highly contagious nature of the condition underlies its capacity for rapid propagation in community settings. Transmission may occur via hand-to-eye contact, sharing of contaminated towels or personal items, or close face-to-face interaction with infected persons.

Adults represent the primary demographic group affected by viral conjunctivitis, reflecting the predominance of viral etiologies in this population compared to children. Individuals in close-contact environments, including schoolchildren, household contacts of infected persons, and healthcare workers, face elevated exposure risk. Source-backed detail on specific immunocompromised or other high-risk populations is not yet available from the provided sources.

Prevention of viral conjunctivitis relies substantially on hand hygiene practices, including thorough handwashing with soap and water or appropriate hand sanitizers. Avoidance of direct contact with infected individuals and refraining from sharing personal items such as towels, washcloths, or eye cosmetics further reduce transmission risk. In healthcare settings, standard infection control precautions are warranted to prevent nosocomial spread.

Surveillance for viral conjunctivitis should account for its high transmissibility and potential for outbreak amplification in congregate settings. The condition's frequent association with adenovirus activity and upper respiratory infections may provide useful contextual indicators for monitoring. Case definitions should distinguish viral from bacterial and allergic etiologies where feasible, as this differentiation carries implications for infection control resource allocation and outbreak investigation priorities.

1. 1 Wikidata. acute hemorrhagic conjunctivitis.
2. 2 Wikipedia. Conjunctivitis - Wikipedia.

ICD-10

B30

ICD-11

9A60

Total cases

0

Peak month

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Coverage

0 reporting countries · —