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Microbial keratitis

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https://www.readbyqxmd.com/read/29227340/corneal-transplantation-in-new-zealand-2000-to-2009
#1
Alexandra Z Crawford, Thiyagaraj Krishnan, Susan E Ormonde, Dipika V Patel, Charles N McGhee
PURPOSE: To quantify all minor/major adverse events in a large cohort of consecutive corneal transplants, particularly in respect to penetrating keratoplasty (PKP). METHODS: All corneal transplants in the Auckland region over a 10-year period (2000-2009) were identified through the New Zealand National Eye Bank. Relevant clinical records were assessed for this period and 2 years after. All intraoperative or postoperative adverse events/complications, visual acuity, and graft outcomes were recorded...
December 8, 2017: Cornea
https://www.readbyqxmd.com/read/29135707/outcome-of-therapeutic-keratoplasty-in-hopeless-microbial-keratitis-cases-otherwise-advised-evisceration
#2
Rajat Jain, Karma L Bhutia, Neha Mohan, Col K C Gupta, Ashwani Ghai
PURPOSE: To study the outcome of therapeutic keratoplasty in severe microbial keratitis cases otherwise advised evisceration. METHODS: A retrospective, single-center clinical audit included 28 patients with severe microbial keratitis presenting from April 2014 to April 2016. Patients with microbial keratitis either affecting more than 2 quadrants of the limbus and/or cases with infections involving more than 180 mm of the cornea who were advised evisceration by more than one ophthalmologist were included...
November 13, 2017: Cornea
https://www.readbyqxmd.com/read/29111996/microbial-keratitis-after-accelerated-corneal-collagen-cross-linking-in-keratoconus
#3
Prafulla K Maharana, Pranita Sahay, M Sujeeth, Deepali Singhal, Anubha Rathi, Jeewan S Titiyal, Namrata Sharma
PURPOSE: To assess the pattern of microbial keratitis after accelerated corneal collagen cross-linkage (aCXL) in patients with keratoconus. METHOD: The medical records of cases of keratoconus that underwent aCXL from June 2014 to May 2017 were reviewed. Cases that developed microbial keratitis after aCXL were included in the study. The clinical, microbiological profile and the treatment outcomes were evaluated. RESULTS: Of 532 eyes that underwent aCXL, 7 cases developed microbial keratitis during the study period...
November 2, 2017: Cornea
https://www.readbyqxmd.com/read/29111995/diagnostic-evaluation-of-co-occurrence-of-acanthamoeba-and-fungi-in-keratitis-a-preliminary-report
#4
Anita Raghavan, Shaffie Baidwal, Prabhu Vijayaraghavan, Sakthi Rajeswari, Revathi Rajaraman, Narendran Venkatapathy, Sunitha Menon, Ram Rammohan
PURPOSE: To test the hypothesis that the coexistence of Acanthamoeba with other forms of microbial keratitis, especially fungal keratitis (FK), is more prevalent than suspected. METHODS: A prospective diagnostic study whereby patients presenting with stromal keratitis were additionally tested for Acanthamoeba, irrespective of the initial diagnosis. In addition to the routine workup with Gram stain, KOH mount, and cultures on blood agar and potato dextrose agar, nonnutrient agar was included...
November 14, 2017: Cornea
https://www.readbyqxmd.com/read/29053557/bacterial-keratitis-isolated-organisms-and-antibiotic-resistance-patterns-in-san-francisco
#5
Michelle Y Peng, Vicky Cevallos, Stephen D McLeod, Thomas M Lietman, Jennifer Rose-Nussbaumer
PURPOSE: Understanding the spectrum of pathogens in a given geographic region is important when deciding on empiric antibiotic therapy. In this study, we evaluate the spectrum of bacterial organisms cultured from corneal samples and their antibiotic sensitivities to guide initial treatment of keratitis. METHODS: We performed a retrospective case review of cultures from suspected infectious keratitis cases at the Francis I. Proctor Foundation, University of California, San Francisco, from 1996 through 2015...
October 17, 2017: Cornea
https://www.readbyqxmd.com/read/29044738/overview-of-mechanisms-of-antibiotic-resistance-in-pseudomonas-aeruginosa-an-ocular-perspective
#6
REVIEW
Dinesh Subedi, Ajay Kumar Vijay, Mark Willcox
Treatment of Pseudomonas aeruginosa eye infections often becomes a challenge due to the ability of this bacterium to be resistant to antibiotics via intrinsic and acquired mechanisms. Transfer of resistance due to interchangeable genetic elements is an important mechanism for the rapid transfer of antibiotic resistance in this pathogen. As a result, drug-resistant strains are becoming increasingly prevalent worldwide. This review systematically analyses data from recent publications to describe the global prevalence and antibiotic sensitivity of ocular P...
October 18, 2017: Clinical & Experimental Optometry: Journal of the Australian Optometrical Association
https://www.readbyqxmd.com/read/29041837/infective-keratitis-in-indian-patients-with-corneal-dystrophies
#7
Anita Ganger, Noopur Gupta, Ankit S Tomar, Murugesan Vanathi, Radhika Tandon
All eight patients seen with various types of corneal dystrophy, a rare hereditary corneal disease, presented with infective keratitis. Unilateral microbial invasion was seen in all patients and the visual acuity of the affected eyes was <6/60 at presentation. We highlight our impression that microbial invasion can occur with all types of epithelial and stromal corneal dystrophy, including macular corneal dystrophy. Regular follow-up to maintain a healthy ocular surface is recommended to avert blindness in such patients...
January 1, 2017: Tropical Doctor
https://www.readbyqxmd.com/read/29033270/a-survey-of-contact-lens-related-complications-in-a-tertiary-hospital-in-china
#8
Weiwei Li, Xuguang Sun, Zhiqun Wang, Yang Zhang
PURPOSE: To describe the type of complications related to contact lens (CL) wear in a tertiary hospital in XX, China. METHODS: A retrospective study of 141 patients who complained discomfort after wearing contact lens on an outpatient basis of XX Hospital were conducted from the January 2012 to December 2015. The data included patients' demographics, lens type, history, slit-lamp examination, reports of corneal scrapings, culture, and examination of in vivo confocal microscopy...
October 12, 2017: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/28954259/roles-of-trim32-in-corneal-epithelial-cells-after-infection-with-herpes-simplex-virus
#9
Hao Cui, Ying Liu, Yifei Huang
BACKGROUND: Epithelial cells play important roles as a critical barrier in protecting the cornea from microbial pathogens infection. METHODS: In this study, we were aiming to investigate the role of E3 ubiquitin ligase tripartite motif protein 32 (TRIM32) in corneal epithelial cells in response to Herpes Simplex Virus type 1 (HSV-1) infection and to elucidate the underlying mechanisms. RESULTS: We found the expression of TRIM32 was increased after infected with HSV-1 both in murine corneas and cultured human epithelial (HCE) cells...
2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28919243/drugs-do-we-need-them-applications-of-non-pharmaceutical-therapy-in-anterior-eye-disease-a-review
#10
REVIEW
Priyanka Mandal, Mohammad A Khan, Sunil Shah
Natural products have been in use long before the introduction of modern drug therapies and are still used in various communities worldwide for the treatment of anterior eye disease. The aim of this review is to look at the current non-pharmaceutical modalities that have been tried and assess the body of existing evidence behind them. This includes alternative medicine, existing non-pharmaceutical therapy and more recent low and high tech solutions. A detailed search of all available databases including MEDLINE, Pubmed and Google was made to look for English-language studies for complementary and alternative treatment modalities (CAM), natural therapies and new modalities for anterior eye disease such as blepharitis, dry eye and microbial keratitis...
September 14, 2017: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/28892949/corneal-collagen-cross-linking-for-treatment-of-bacterial-and-herpetic-keratitis
#11
Mohammad Reza Khalili, Hamid Reza Jahadi, Mashaallah Karimi, Masoud Yasemi
INTRODUCTION: Optimal management of infective keratitis is a formidable challenge and subject of ongoing studies. Recently, Collagen Cross-Linking (CXL) of the cornea has been considered to be a new effective therapeutic approach for resistant infectious keratitis. AIM: Aim of the study was to evaluate the effectiveness of CXL with Ultraviolet-A (UV-A) and riboflavin for treatment of the refractory bacterial and Herpes Simplex Virus (HSV) keratitis. MATERIALS AND METHODS: In this prospective interventional study, eight patients with diagnosis of infectious keratitis who were referred to Khalili Hospital eye emergency room, between 2014 and 2015 were included in the study...
July 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28832498/corneal-fibroblasts-as-sentinel-cells-and-local-immune-modulators-in-infectious-keratitis
#12
REVIEW
Ken Fukuda, Waka Ishida, Atsuki Fukushima, Teruo Nishida
The cornea serves as a barrier to protect the eye against external insults including microbial pathogens and antigens. Bacterial infection of the cornea often results in corneal melting and scarring that can lead to severe visual impairment. Not only live bacteria but also their components such as lipopolysaccharide (LPS) of Gram-negative bacteria contribute to the development of inflammation and subsequent corneal damage in infectious keratitis. We describe the important role played by corneal stromal fibroblasts (activated keratocytes) as sentinel cells, immune modulators, and effector cells in infectious keratitis...
August 23, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28815736/the-diagnosis-and-management-of-contact-lens-related-microbial-keratitis
#13
REVIEW
Nicole Carnt, Chameen Samarawickrama, Andrew White, Fiona Stapleton
Contact lens-associated microbial keratitis poses a diagnostic dilemma for optometrists on two fronts. The distinction between sterile inflammation and microbial infection is often blurred. In addition, there is a requirement with nearly 50 per cent of the Australian and New Zealand optometric profession being therapeutically endorsed, to distinguish between cases of infection that can be managed in the community verses those that require escalation to public hospitals that have access to laboratory diagnostic tools and advanced imaging techniques, such as in vivo confocal microscopy...
August 16, 2017: Clinical & Experimental Optometry: Journal of the Australian Optometrical Association
https://www.readbyqxmd.com/read/28813424/risk-factors-and-causative-organisms-in-microbial-keratitis-in-daily-disposable-contact-lens-wear
#14
MULTICENTER STUDY
Fiona Stapleton, Thomas Naduvilath, Lisa Keay, Cherry Radford, John Dart, Katie Edwards, Nicole Carnt, Darwin Minassian, Brien Holden
PURPOSE: This study investigated independent risk factors and causative organisms in microbial keratitis in daily disposable contact lens (CL)-wearers. METHODS: A multisite prospective case-control study was undertaken. Cases were daily disposable CL-wearers attending Moorfields Eye Hospital with microbial keratitis and those reported through a one-year surveillance study in Australia and in New Zealand. A population-based telephone survey identified daily disposable CL-wearing controls...
2017: PloS One
https://www.readbyqxmd.com/read/28739646/koh-mount-as-an-aid-in-the-management-of-infectious-keratitis-at-secondary-eye-care-centre
#15
Varsha M Rathi, Monica Thakur, Savitri Sharma, Rohit Khanna, Prashant Garg
AIMS: To report the clinical outcome of infectious keratitis managed after doing 10% KOH mount of corneal smears and reporting done by an ophthalmologist in the secondary eye care centre in South India. METHODS: 103 consecutive cases of microbial keratitis were studied. Inclusion criteria were presence of corneal infiltrate on slit lamp biomicroscopy. An ophthalmologist carried out microbiological evaluation of 10% KOH mount of corneal scrapings. No cultures were done at secondary centres...
November 2017: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/28708218/microbial-characteristics-of-posttraumatic-infective-keratitis
#16
Blanche X Lim, Victor T C Koh, Manotosh Ray
PURPOSE: To determine the demographics, risk factors, clinical and microbiological characteristics, and treatment outcome of posttraumatic infective keratitis. METHODS: Consecutive patients with posttraumatic infective keratitis presenting to the Ophthalmology Department of a tertiary referral hospital in Singapore between March 2012 and March 2016 were prospectively identified. A standardized data collection form was used to document patient demographics, microbiological diagnosis, antibiotic sensitivity, and pretreatment and posttreatment ocular characteristics...
July 8, 2017: European Journal of Ophthalmology
https://www.readbyqxmd.com/read/28644238/prevention-and-management-of-descemet-membrane-endothelial-keratoplasty-complications
#17
Ruth Quilendrino, Marina Rodriguez-Calvo de Mora, Lamis Baydoun, Lisanne Ham, Korine van Dijk, Isabel Dapena, Silke Oellerich, Gerrit R J Melles
PURPOSE: To describe Descemet membrane endothelial keratoplasty (DMEK) complications and strategies for their prevention and management. METHODS: Five hundred consecutive eyes with DMEK of 393 patients were reviewed in this retrospective study for intraoperative and postoperative complications up to 2 years and for corresponding management. RESULTS: Intraoperative challenges (difficult graft unfolding/positioning, high vitreous pressure, iris root hemorrhage, and Descemet membrane remnants) were encountered in 81 eyes (16...
September 2017: Cornea
https://www.readbyqxmd.com/read/28575976/thermosensitive-hydrogel-as-an-in-situ-gelling-antimicrobial-ocular-dressing
#18
S Mohammed, Gurpreet Chouhan, Olachi Anuforom, Megan Cooke, Anna Walsh, Peter Morgan-Warren, Mike Jenkins, Felicity de Cogan
Microbial keratitis is a severe ocular condition and one of the most prevalent causes of corneal scarring and associated blindness worldwide. Risk factors include contact lens use, ocular trauma, ocular surface disease and immunosuppression. Initial clinical management mandates intensive (hourly or more frequent) topical administration of broad spectrum antimicrobial therapy for at least 48h, which may require hospital admission, followed by tailored therapy based on microbiological investigation and the institution of strategies to reduce inflammation and promote healing...
September 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28573109/persistence-of-innate-immune-pathways-in-late-stage-human-bacterial-and-fungal-keratitis-results-from-a-comparative-transcriptome-analysis
#19
Jaya D Chidambaram, Shichina Kannambath, Palepu Srikanthi, Manisha Shah, Prajna Lalitha, Shanmugam Elakkiya, Julien Bauer, Namperumalsamy V Prajna, Martin J Holland, Matthew J Burton
Microbial keratitis (MK) is a major cause of blindness worldwide. Despite adequate antimicrobial treatment, tissue damage can ensue. We compared the human corneal transcriptional profile in late stage MK to normal corneal tissue to identify pathways involved in pathogenesis. Total RNA from MK tissue and normal cadaver corneas was used to determine transcriptome profiles with Illumina HumanHT-12 v4 beadchips. We performed differential expression and network analysis of genes in bacterial keratitis (BK) and fungal keratitis (FK) compared with control (C) samples...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28546688/collagen-cross-linking-for-microbial-keratitis
#20
REVIEW
Prashant Garg, Sujata Das, Aravind Roy
Collagen cross-linking is gaining popularity not only for arresting the progression of keratoconus but also other indications including management of corneal infections. In this review article, we analyzed the published literature to understand the level of evidence for its use in corneal ulcer. Photoactivated riboflavin and ultraviolet A light are known to possess antimicrobial properties. The treatment also induces formation of inter- and intra-fibrillar bonds, thereby making the corneal collagen resistant to the action of proteases arresting stromal melt...
January 2017: Middle East African Journal of Ophthalmology
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