Bacterial keratitis early after corneal crosslinking with riboflavin and ultraviolet-A
Department of Ophthalmology, Friedrich-Alexander-University Erlangen-Nürnberg, Erlangen, Germany. Journal of Cataract and Refractive Surgery
(Impact Factor: 2.72).
04/2009; 35(3):588-9. DOI: 10.1016/j.jcrs.2008.09.029
We report a case of bacterial keratitis 3 days after corneal crosslinking for keratoconus. The patient complained of increasing pain and redness combined with blurred vision in the treated eye starting on the first postoperative day. Clinical examination showed multiple stromal infiltrations and moderate anterior chamber inflammation. Corneal scraping revealed an Escherichia coli infection, which was successfully treated with fortified tobramycin and cephazolin eyedrops for several weeks. This is the first report of a case of rare postoperative complication resulted in an avascularized corneal scar and permanent reduction of the visual acuity.
Available from: Romina Fasciani
- "The most frequently observed complications are represented by corneal scarring, sterile infiltrates   , and delayed epithelial healing, whereas infectious keratitis, although rare, seems to be the most serious complication        . Keratoconus is commonly observed in patients with atopic disease, with itching causing repeated eye rubbing that may trigger or exacerbate corneal ectasia in genetically predisposed patients . "
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ABSTRACT: Purpose. To report the risk of methicillin-resistant Staphylococcus aureus (MRSA) ocular infection after UVA-riboflavin corneal collagen cross-linking in a patient with atopic dermatitis. Methods. A 22-year-old man, with bilateral evolutive keratoconus and atopic dermatitis, underwent UVA-riboflavin corneal cross-linking and presented with rapidly progressive corneal abscesses and cyclitis in the treated eye five days after surgery. The patient was admitted to the hospital and treated with broad-spectrum antimicrobic therapy. Results. The patient had positive cultures for MRSA, exhibiting a strong resistance to antibiotics. Antibiotic therapy was modified and targeted accordingly. The intravitreal reaction is extinguished, but severe damage of ocular structures was unavoidable. Conclusion. Riboflavin/UVA corneal cross-linking is considered a safe procedure and is extremely effective in halting keratoconus' progression. However, this procedure is not devoid of infectious complications, due to known risk factors and/or poor patients' hygiene compliance in the postoperative period. Atopic dermatitis is a common disease among patients with keratoconus and Staphylococcus aureus colonization is commonly found in patients with atopic dermatitis. Therefore, comorbidity with atopic dermatitis should be thoroughly assessed through clinical history before surgery. A clinical evaluation within three days after surgery and the imposition of strict personal hygiene rules are strongly recommended.
Available from: Rajesh S Kumar
- "Customization of CXL is in vogue . However, microbial keratitis due to varied etiology including herpetic, bacterial (Escherichia coli, Pseudomonas, Staphylococcus and Streptococcus), and Acanthamoeba has been reported after CXL      . We have evaluated the incidence of post-CXL infectious keratitis among keratoconus patients in our centre and reported a series of patients who developed moxifloxacin resistant Staphylococcus aureus (MXRSA) keratitis following CXL. "
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ABSTRACT: Purpose. To report the profile of microbial keratitis occurring after corneal collagen cross-linking (CXL) in keratoconus patients.
Methods. A retrospective analysis of 2350 patients (1715 conventional CXL, 310 transepithelial CXL, and 325 accelerated CXL) over 7 years (from January 2007 to January 2014) of progressive keratoconus, who underwent CXL at a tertiary eye care centre, was performed. Clinical findings, treatment, and course of disease of four eyes that developed postprocedural moxifloxacin resistant Staphylococcus aureus (MXRSA) infectious keratitis are highlighted. Results. Four eyes that underwent CXL (0.0017%) had corneal infiltrates. All eyes that developed keratitis had conventional CXL. Corneal infiltrates were noted on the third postoperative day. Gram's stain as well as culture reported MXRSA as the causative agent in all cases. Polymerase chain reaction (PCR) in each case was positive for eubacterial genome. All patients were treated with fortified antibiotic eye drops, following which keratitis resolved over a 6-week period with scarring. All these patients were on long-term preoperative oral/topical steroids for chronic disorders (chronic vernal keratoconjunctivitis, bronchial asthma, and chronic eczema). Conclusion. The incidence of infectious keratitis after CXL is a rare complication (0.0017%). MXRSA is a potential organism for causing post-CXL keratitis and should be identified early and treated aggressively with fortified antibiotics.
Available from: Jayesh Vazirani
- "Reported adverse effects with collagen crosslinking include bacterial, fungal, acanthamoeba, and sterile kerati-tis.69–75 Kymionis et al reported significant endothelial cell loss after crosslinking in thin corneas.76 "
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ABSTRACT: Keratoconus is characterized by progressive corneal protrusion and thinning, leading to irregular astigmatism and impairment in visual function. The etiology and pathogenesis of the condition are not fully understood. However, significant strides have been made in early clinical detection of the disease, as well as towards providing optimal optical and surgical correction for improving the quality of vision in affected patients. The past two decades, in particular, have seen exciting new developments promising to alter the natural history of keratoconus in a favorable way for the first time. This comprehensive review focuses on analyzing the role of advanced imaging techniques in the diagnosis and treatment of keratoconus and evaluating the evidence supporting or refuting the efficacy of therapeutic advances for keratoconus, such as newer contact lens designs, collagen crosslinking, deep anterior lamellar keratoplasty, intracorneal ring segments, photorefractive keratectomy, and phakic intraocular lenses.
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