Mycobacterium chelonae conjunctivitis and scleritis following vitrectomy

Area of Science:

• Ophthalmology
• Infectious Diseases
• Microbiology

Background:

• Nontuberculous mycobacteria (NTM) are opportunistic pathogens found in various environments, including healthcare settings.
• NTM infections often occur post-trauma or surgery and are increasingly recognized in medical environments.
• Ocular infections caused by NTM pose management challenges due to variable antibiotic efficacy and slow host immune responses.

Observation:

• This report details a case of severe ocular infection caused by Mycobacterium chelonae.
• The infection developed in a patient following a vitrectomy procedure.
• Despite successful eradication of the Mycobacterium chelonae infection, the patient experienced irreversible vision loss and persistent ocular pain.

Findings:

• In vitro antibiotic susceptibility does not reliably predict in vivo treatment outcomes for NTM ocular infections.
• The host's immune system may respond too slowly to prevent permanent damage to ocular tissues from mycobacterial infections.
• Mycobacterium chelonae can cause severe, sight-threatening ocular infections even after successful antimicrobial therapy.

Implications:

• This case highlights the potential for severe visual impairment and complications from NTM ocular infections post-ophthalmic surgery.
• Effective management strategies for NTM ocular infections require careful consideration of both antimicrobial therapy and host immune factors.
• Further research is needed to improve diagnostic and therapeutic approaches for these challenging infections to prevent vision loss.