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In Situ Characterization of Shewanella oneidensis MR1 Biofilms by SALVI and ToF-SIMS
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Shewanella algae keratitis.

Chelsey A Bravenec1, Rahul T Pandit2, Hilary A Beaver2

  • 1Department of Ophthalmology, The University of Texas Medical Branch College of Medicine, Galveston, TX, USA.

Indian Journal of Ophthalmology
|December 22, 2018
PubMed
Summary
This summary is machine-generated.

A severe corneal ulcer caused by Shewanella algae and Klebsiella oxytoca required penetrating keratoplasty (PKP). The corneal transplant successfully improved vision in this complex glaucoma and dry eye patient.

Keywords:
S. algae; keratitisShewanellacornea ulcer

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Area of Science:

  • Ophthalmology
  • Infectious Diseases

Background:

  • The patient had a history of chronic dry eye syndrome, glaucoma, and Fuchs dystrophy.
  • Previous ocular surgeries included a tube shunt, Descemet stripping endothelial keratoplasty, and a prior penetrating keratoplasty (PKP).

Observation:

  • A 75-year-old male presented with a significant corneal ulcer (2.7 × 4.2 mm).
  • Cultures confirmed infection with Shewanella algae and Klebsiella oxytoca.
  • The patient experienced poor follow-up, leading to descemetocele formation.

Findings:

  • Initial treatment involved topical gentamicin and vancomycin, with concurrent loteprednol and later erythromycin ointment.
  • The corneal ulcer showed improvement with antibiotic therapy.
  • Descemetocele formation necessitated a repeat PKP, which was successful.

Implications:

  • This case highlights the importance of diligent follow-up in managing infectious keratitis, especially in patients with complex ocular histories.
  • Successful corneal transplantation can restore significant visual function even after severe infectious keratitis and prior graft failure.
  • Management of infectious keratitis in patients with pre-existing ocular conditions requires a tailored and vigilant approach.