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First case of fungal keratitis caused by Pestalotiopsis clavispora
Yu Monden1, Shohaku Yamamoto1, Ryoji Yamakawa1
1Department of Ophthalmology, Kurume University School of Medicine, Fukuoka, Tokyo.
Purpose:
To report the isolation of Pestalotiopsis clavispora from the cornea of a patient with recurrent keratitis.
Case Report:
A 73-year-old male gardener presented with conjunctival injection and an oval infiltrate with feathery margins in the temporal half of the cornea in the right eye. His ocular history in the right eye included cataract surgery, five episodes of herpes simplex keratitis, three glaucoma surgeries, and bullous keratopathy. He had been treated with corticosteroids for years. Light microscopy of corneal scrapings revealed a filamentous fungus, and fungal keratitis was diagnosed. Treatment with topical voriconazole and pimaricin ointment was commenced. One month later, the infiltrate resolved. The antifungal agents were discontinued 7 months later, and keratitis relapsed 4 days after the discontinuation. The fungus was isolated and identified by molecular techniques as P. clavispora. Based on the results of antifungal susceptibility testing, treatment with topical and intravenous micafungin was initiated. The corneal infiltrate resolved 1 month after the relapse.
Conclusion:
Molecular identification of the pathogen, and antifungal susceptibility testing, are useful in treating patients with fungal keratitis caused by a rare human pathogen.
Insights
This case report details the successful treatment of rare fungal keratitis caused by Pestalotiopsis clavispora. Molecular identification and antifungal susceptibility testing guided effective therapy for this challenging corneal infection.
Area of Science:
- Ophthalmology
- Mycology
- Infectious Diseases
Background:
- Fungal keratitis is a serious ocular infection, often challenging to diagnose and treat.
- Recurrent cases and those caused by rare fungal species require specific diagnostic and therapeutic approaches.
Observation:
- A 73-year-old male with a history of multiple ocular surgeries and corticosteroid use presented with recurrent keratitis.
- Corneal scrapings revealed a filamentous fungus, initially treated empirically.
- Relapse occurred after initial treatment discontinuation, necessitating further investigation.
Findings:
- Molecular techniques identified the causative agent as Pestalotiopsis clavispora, a rare cause of human fungal keratitis.
- Antifungal susceptibility testing guided the selection of topical and intravenous micafungin.
- Successful resolution of the corneal infiltrate was achieved with targeted antifungal therapy.
Implications:
- Accurate identification of fungal pathogens, including rare species, is crucial for effective treatment of fungal keratitis.
- Antifungal susceptibility testing provides essential data for selecting appropriate and effective antifungal agents.
- This case highlights the importance of a comprehensive diagnostic and therapeutic strategy for managing complex fungal keratitis.
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