Nosocomial conjunctivitis caused by adenovirus type 4

Area of Science:

• Ophthalmology
• Infectious Diseases
• Hospital Epidemiology

Background:

• Adenovirus type 4 (AV 4) can cause pneumonia and other infections.
• Nosocomial infections pose a significant risk in healthcare settings.
• Previous isolation protocols may have been relaxed, potentially increasing transmission risk.

Observation:

• An outbreak of conjunctivitis linked to AV 4 occurred among hospital personnel.
• Nine individuals developed symptoms after contact with a patient with AV 4 pneumonia.
• Infectious virus was detected in ocular secretions for up to 10 days post-symptom onset.

Findings:

• Adenovirus type 4 infection was confirmed through viral isolation and serological testing.
• The incubation period ranged from 7 to 10 days, with illness lasting 5 to 7 days.
• One patient experienced prolonged visual disturbance due to subepithelial deposits.

Implications:

• Abandoning isolation procedures contributed to the nosocomial spread of AV 4.
• Effective infection control measures, including patient isolation and barrier nursing, are vital.
• Preventing adenoviral outbreaks protects healthcare workers and prevents patient complications.