What is the most common cause of viral conjunctivitis?

The most common cause of viral conjunctivitis is adenovirus. This virus is responsible for a significant number of conjunctivitis cases, particularly in group settings, such as schools or daycare facilities, where it can easily spread from one individual to another. Adenovirus can result in a highly contagious form of conjunctivitis, often characterized by redness, watery discharge, and irritation of the eye.

While herpes simplex can cause conjunctivitis, it is less common compared to adenovirus and usually presents alongside other more severe symptoms. Staphylococci and Neisseria gonorrhea, while associated with bacterial conjunctivitis, do not produce viral infections and thus do not contribute to cases of viral conjunctivitis. Understanding the distinctions between the types of pathogens can help in effective diagnosis and management of conjunctivitis in clinical practice.