Which finding is most suggestive of viral conjunctivitis?

• A. Copious watery discharge
• B. Fever
• C. Bilateral eye discharge
• D. Pre-auricular LAD

Answer: (D)

Preauricular lymphadenopathy is a hallmark clue pointing toward a viral conjunctivitis. When the conjunctiva is infected by a virus, the regional lymph nodes that drain that area—the preauricular nodes—tend to enlarge as part of the immune response. This finding is more specific for a viral cause than other common features.

Viral conjunctivitis often follows or accompanies a recent upper respiratory infection and typically presents with watery discharge and conjunctival injection. While watery discharge can occur with other causes, and bilateral involvement can be seen with allergies or viral etiologies, the presence of enlarged preauricular nodes is the most suggestive sign of a viral process. Bacterial conjunctivitis usually shows purulent discharge and crusting rather than prominent preauricular LAD, and allergic conjunctivitis is dominated by itching and bilateral involvement with itching and cobblestone papillae rather than LAD. Fever is nonspecific and not diagnostic for viral conjunctivitis.

So, the preauricular lymphadenopathy stands out as the best clue that the conjunctivitis is viral in origin.