Alternaria keratitis after uneventful phacoemulsification in an otherwise healthy adult
© Khochtali et al. 2016
Received: 30 December 2015
Accepted: 9 February 2016
Published: 16 February 2016
Fungal infections of self-sealing corneal incisions in cataract surgery are scarce. We report a case of Alternaria keratitis, several weeks after uneventful clear-cornea phacoemulsification.
A 42-year-old woman, with a history of retinitis pigmentosa, complained of painful red right eye, 45 days after uneventful self-sealing clear-cornea phacoemulsification. Slit-lamp examination revealed multiple snow-like contiguous stromal infiltrates, with irregular margins, and no epithelial defect. These infiltrates were unresponsive to topical quinolones and topical corticosteroids as well as oral valaciclovir. Culture from corneal biopsy specimen grew Alternaria species. Management consisted of topical amphotericin-B, and then a combination of topical and oral voriconazole. The corneal infiltrates progressively healed. One year later, the best-corrected visual acuity was 20/400.
Fungal infection, particularly Alternaria keratitis, should be considered in the differential diagnosis of delayed post-cataract surgery keratitis. Prompt diagnosis and management are mandatory to improve visual prognosis.
KeywordsPhacoemulsification Keratitis Fungi Alternaria
Infectious complications after cataract surgery are usually sight-threatening. They mainly include postoperative endophthalmitis, and more rarely wound infections which may be associated or not with endophthalmitis. There have been a few reports about wound infections after clear-cornea phacoemulsification. Bacteria are the most common causative agents . Fungal infection of self-sealing corneal incisions in cataract surgery is scarce, with Aspergillus being the most commonly identifiable fungi in this setting [1, 2].
We herein report a case of Alternaria keratitis, 45 days after uneventful clear-cornea phacoemulsification in a 42-year-old otherwise healthy patient.
A 42-year-old woman with a history of retinitis pigmentosa, pseudophakic in both eyes, was referred to our department with vision blurring and pain in the right eye (RE). Uneventful self-sealing clear-cornea phacoemulsification with in-the-bag foldable hydrophilic acrylic intraocular lens implantation had been performed in the RE, 45 days prior to the onset of symptoms. The main port had been temporal. Medical history ruled out ocular trauma and contact lens wear.
This case report was approved by local ethics committee.
Wound infection of a self-sealing corneal incision in cataract surgery, defined by an infectious process starting from the incision area, is rare. Fungi are less commonly identified as causative agents than bacteria, with Aspergillus ranking first, followed by Candida, Fusarium, Alternaria, and Scedosporium which were identified in only few cases [1–5].
The sources of microorganisms in clear-cornea self-sealing incisions are probably similar to those of postoperative endophthalmitis. The possible sources include the patient’s eyelids and conjunctiva, contaminated instruments, intraocular lenses, or irrigating solutions, airborne germs, and major breaches in the sterile techniques [2, 3, 6]. Many factors have been involved in the development of self-sealing wound infections including immunosuppression, diabetes mellitus, dry eye syndrome, preoperative eyelid infections, obstructed nasolacrimal duct, prolonged use of systemic or topical steroids, and defect in wound architecture .
Fungal wound infections are rare. Garg et al. reported five cases of fungal infection of sutureless self-sealing incision for phacoemulsification and identified Aspergillus in four eyes (80 %) and Candida in one case (20 %). In our patient, culture of corneal biopsy grew Alternaria. It is a filamentous dematiaceous ubiquitous mold that is frequently isolated from soil, plants, and indoor air environment particularly in tropical and subtropical climates . Alternaria keratitis has been rarely reported. It usually occurs after ocular trauma or in the setting of contact lens wear [7–10]. Postsurgical Alternaria corneal infection has been described after corneal transplantation , laser in situ keratomileusis , and after cataract surgery . To the best of our knowledge, Alternaria keratitis has been previously described as a complication of a self-sealing clear-cornea phacoemulsification in only one patient . Similarly to our patient, the fungal origin of the keratitis in this patient was initially overlooked. Delay in diagnosis was 5 months in the previously reported case, and 1 month in our case. The use of topical steroids has worsened the infectious process in both cases. Early recognition of the snow-like appearance of the infiltrates associated with satellite lesions as seen in our case, or of fernlike feathery margins could have allowed an earlier diagnosis of the fungal cause of infectious keratitis [3, 8].
However, interval between the phacoemulsification procedure and the insidious onset of symptoms was longer in our patient (45 versus 15 days). The source of the wound infection remained unknown in both cases. Our patient was otherwise healthy, unlike the previously reported patient who had a history of diabetes . In fact, diabetes mellitus has been described as an important predisposing or aggravating factor in fungal wound infections .
Alternaria wound infections, similarly to other fungal wound infections, are often deep-seated, and superficial corneal scraping often yields negative results. Repeated deep scrapings, corneal biopsy as in our patient, or anterior chamber tap when it is compromised usually allow the identification of the causative germ [2, 3]. Polymerase chain reaction can be a useful adjunct to smear and culture in the diagnosis of fungal keratitis, in cases of failed detection with routine techniques .
In vivo confocal microscopy may show hyperreflective filaments, corresponding to filamentous fungi including Alternaria, and thus may help to establish an early diagnosis ; however, this technique is not widely available. In addition to that, anterior segment optical coherence tomography may visualize fungal hyphae growing into anterior chamber from the cornea, indicating the filamentous fungal origin of keratitis [8, 9].
In Alternaria keratitis, drops of fluconazole 0.02 %, voriconazole 1 %, ketoconazole, and amphotericin B maintained for several weeks are helpful to control infection . Topical caspofungin 0.5 % associated with intrastromal voriconazole was used in a refractory case . In our patient, improvement was not seen with amphotericin B, but significant improvement was observed soon after topical and systemic voriconazole was initiated.
In summary, Alternaria keratitis is a rare complication of self-sealing corneal incision phacoemulsification. It should be suspected when onset of keratitis is delayed and insidious. Satellite lesions and fernlike margins are very typical clinical features of filamentous fungal abscesses, including Alternaria keratitis. Prompt diagnosis and management are mandatory to improve visual prognosis.
Best-corrected visual acuity
This work has been supported by the Ministry of Higher Education and Research of Tunisia.
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- Kehdi EE, Watson SL, Francis IC, Chong R, Bank A, Coroneo MT, Dart JK (2005) Spectrum of clear corneal incision cataract wound infection. J Cataract Refract Surg 31(9):1702–1706View ArticlePubMedGoogle Scholar
- Garg P, Mahesh S, Bansal AK, Gpinathan U, Rao GN (2003) Fungal infection of sutureless self-sealing incision for cataract surgery. Ophthalmology 110:2173–2177View ArticlePubMedGoogle Scholar
- Espósito E, Maccio JP, Monti R, Cervi L, Serra HM, Urrets-Zavalía JA (2014) Alternaria keratitis and hypopyon after clear-cornea phacoemulsification. J Cataract Refract Surg 40:331–334View ArticlePubMedGoogle Scholar
- Jutley G, Koukkoulli A, Forbes J, Sharma V (2015) Unusual case of Scedosporium apiospermum keratitis following phacoemulsification in a systemically well patient. J Cataract Refract Surg 41(1):230–233View ArticlePubMedGoogle Scholar
- Jhanji V, Sharma N, Mannan R, Titiyal JS, Vajpayee RB (2007) Management of tunnel fungal infection with voriconazole. J Cataract Refract Surg 33(5):915–917View ArticlePubMedGoogle Scholar
- Cosar CB, Cohen EJ, Rapuano CJ, Laibson PR (2001) Clear corneal wound infection after phacoemulsification. Arch Ophthalmol 119(12):1755–1759View ArticlePubMedGoogle Scholar
- Tu EY (2009) Alternaria keratitis: clinical presentation and resolution with topical fluconazole or intrastromal voriconazole and topical caspofungin. Cornea 28:116–119View ArticlePubMedGoogle Scholar
- Cho KJ, Kim MS (2014) Fungal hyphae growing into anterior chamber from cornea. Can J Ophthalmol 49(6):e151–e154View ArticlePubMedGoogle Scholar
- Martone G, Pichierri P, Franceschini R, Moramarco A, Ciompi L, Tosi GM, Balestrazzi A (2011) In vivo confocal microscopy and anterior segment optical coherence tomography in a case of Alternaria keratitis. Cornea 30(4):449–453View ArticlePubMedGoogle Scholar
- Ursea R, Tavares LA, Feng MT, McColgin AZ, Snyder RW, Wolk DM (2010) Non-traumatic Alternaria keratomycosis in a rigid gas-permeable contact lens patient. Br J Ophthalmol 94(3):389–390View ArticlePubMedGoogle Scholar
- Konidaris V, Mersinoglou A, Vyzantiadis TA, Papadopoulou D, Boboridis KG, Ekonomidis P (2013) Corneal transplant infection due to Alternaria alternata: a case report. Case Rep Ophthalmol Med 2013:589620PubMed CentralPubMedGoogle Scholar
- Kocatürk T, Pineda R II, Green LK, Azar DT (2007) Post-LASIK dendritic defect associated with Alternaria. Cornea 26:1144–1146View ArticlePubMedGoogle Scholar
- Tananuvat N, Salakthuantee K, Vanittanakom N, Pongpom M, Ausayakhun S (2012) Prospective comparison between conventional microbial work-up vs PCR in the diagnosis of fungal keratitis. Eye (Lond) 26(10):1337–1343View ArticleGoogle Scholar