Acute hemorrhagic conjunctivitis

Acute hemorrhagic conjunctivitis (AHC), also known as epidemic hemorrhagic conjunctivitis or "red eye" disease, is mainly caused by enterovirus 70, coxsackievirus A24 variant and adenovirus type 11.

Patients are the main source of infection, with the virus present in eye secretions and tears. The highest infectivity occurs within two weeks after the onset of the disease. The primary mode of transmission is through contact with contaminated hands, objects, or water containing the patient's eye secretions. It has a high infectivity and spreads rapidly. The general population is generally susceptible, leading to outbreaks.

The incubation period is generally 12 to 48 hours, with a maximum of six days. The onset is rapid, with common symptoms including subconjunctival hemorrhage and punctate epithelial keratitis.

Irritation symptoms are severe, and symptoms such as foreign body sensation, eye pain, tearing, photophobia and increased watery discharge can quickly appear. Both eyes may simultaneously or successively show symptoms, and recovery typically occurs within two to three weeks.

It is recommended for the public to maintain good hygiene practices, avoid sharing towels and other personal items, practice hand hygiene, and avoid direct contact with the eyes. During the prevalence of the disease, it is advisable to minimize visits to crowded places such as swimming pools and bathrooms.