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  • Title: Intrastromal voriconazole as successful adjunctive approach for recalcitrant deep fungal keratitis.
    Author: Bhirud A, Mishra A, Agrawal M, Sharma J.
    Journal: Rom J Ophthalmol; 2023; 67(1):7-13. PubMed ID: 37089799.
    Abstract:
    Aim: To assess efficacy of intrastromal voriconazole (ISV) in the treatment of fungal keratitis non-responding to conventional antifungals. Methods: Eighteen patients with smear positive fungal keratitis, not responding to conventional topical/ systemic antifungal therapy up to 2 weeks, were included in the study. Afterwards, they were given ISV (50 µg in 0.1 ml) around the ulcer and continued to receive conventional antifungal therapy. Responses to treatment (decrease in size of the ulcer and infiltrates) were recorded daily for 3-days, at 1-week and every 2 weeks for 3-months, or until the ulcer had healed completely. Results: The mean age at presentation was 51 ± 17.83 years. The most common organism isolated was Fusarium (17/ 18), followed by Aspergillus (1/ 18). All the patients were successfully treated in terms of corneal healing, but one case did not improve in vision due to the existence of diabetic macular oedema. 6 patients improved after a single injection, 7 had to receive 2 and 5 improved after 3 injections. The mean number of injections in 17 treated patients was 1.94 ± 0.78. Moreover, the mean resolution time was 18.50 ± 6.25 days. The size of ulcer and height of hypopyon at presentation were noteworthy risk-factors linked to management outcomes. Deeper ulcers required a greater number of injections when compared to superficial ulcers. The mean best-corrected visual acuity improved from 0.94 to 0.25 at 3 months follow-up in all the patients. Conclusion: Intrastromal Voriconazole (50 µg/ 0.1 mL) appears to be an effective adjunct therapy in cases of recalcitrant deep fungal keratitis non-responding to conventional antifungals. Though, some may require repeated injections, timely ISV administration certainly reducing the need for tectonic/ therapeutic keratoplasty. Abbreviations: ISV = Intrastromal Voriconazole, AS-OCT = anterior-segment optical coherence topography, KOH = potassium hydroxide, BCVA = best-corrected visual acuity.
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