Moraxella atlantae keratitis presenting with an infectious ring ulcer

Area of Science:

• Ophthalmology
• Infectious Diseases
• Microbiology

Background:

• Moraxella atlantae is an infrequently encountered bacterial pathogen.
• Infectious keratitis caused by Moraxella atlantae has not been previously documented.
• Corneal ring infiltrates can arise from various causes, including infectious, toxic, and immunologic etiologies.

Observation:

• A 41-year-old male presented with acute eye pain and a corneal ring infiltrate.
• Moraxella atlantae was identified as the causative agent through corneal culture.
• The patient received treatment with topical antibiotics (gatifloxacin, tobramycin) and oral doxycycline.

Findings:

• Successful resolution of Moraxella atlantae infectious keratitis was achieved.
• The infection presented as a characteristic ring-shaped corneal ulcer.
• Visual acuity improved to 20/200 with a residual corneal scar.

Implications:

• This case highlights Moraxella atlantae as a potential cause of infectious keratitis.
• Distinguishing infectious ring infiltrates from immune-mediated rings (e.g., Wessely rings) is crucial for appropriate management.
• Understanding the diverse etiologies of corneal ring infiltrates is essential for ophthalmologists.