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Fungal keratitis

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https://www.readbyqxmd.com/read/28708218/microbial-characteristics-of-posttraumatic-infective-keratitis
#1
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/28704321/observation-of-retrocorneal-plaques-in-patients-with-infectious-keratitis-using-anterior-segment-optical-coherence-tomography
#2
Yuki Takezawa, Takashi Suzuki, Atsushi Shiraishi
PURPOSE: Endothelial plaques are a typical characteristic in patients with fungal keratitis. However, bacterial keratitis and herpetic keratouveitis are rarely associated with fibrin formation on the retrocorneal surface. This study was conducted to examine plaques attached to the endothelium in patients with infectious keratitis using anterior segment optical coherence tomography (AS-OCT). METHODS: Seventeen patients (10 women and 7 men; mean age, 75 ± 15.5 years) suspected to have infectious keratitis with retrocorneal plaques were included...
July 11, 2017: Cornea
https://www.readbyqxmd.com/read/28702317/fungal-keratitis-caused-by-metarhizium-anisopliae-complex
#3
Mahmood J Showail, Julianne V Kus, George Kar Tsui, Hall F Chew
PURPOSE: To report a case of fungal keratitis caused by Metarhizium anisopliae complex. METHODS: Case report. RESULTS: Our patient presented with a central corneal infiltrate. Fungal culture yielded a Metarhizium species. She was started on antifungal agents with no significant improvement. A therapeutic corneal transplant was performed after perforation. At two years follow up, she was free of infection. CONCLUSION: Metarhizium anisopliae is a very rare cause of keratitis...
September 2017: Medical Mycology Case Reports
https://www.readbyqxmd.com/read/28691942/rose-bengal-photodynamic-antimicrobial-therapy-a-novel-treatment-for-resistant-fusarium-keratitis
#4
Guillermo Amescua, Alejandro Arboleda, Neda Nikpoor, Heather Durkee, Nidhi Relhan, Mariela C Aguilar, Harry W Flynn, Darlene Miller, Jean-Marie Parel
PURPOSE: To evaluate the efficacy of rose bengal PDAT for the management of a patient with multidrug-resistant Fusarium keratoplasticum keratitis unresponsive to standard clinical treatment. METHODS: This case report presents a clinical case of F. keratoplasticum keratitis not responsive to standard medical care. In vitro studies from patients culture isolated responded to rose bengal PDAT. Patient received two treatments with rose bengal 0.1% and exposure to green light with a total energy of 2...
July 6, 2017: Cornea
https://www.readbyqxmd.com/read/28681884/condition-responsive-nanoparticles-for-managing-infection-and-inflammation-in-keratitis
#5
Saad M Ahsan, Ch Mohan Rao
Keratitis is a major cause of avoidable visual impairment. About 30% of patients with fungal keratitis eventually become permanently blind in the developing world. Proteases, secreted by the pathogen and the host, damage the cornea before the infection is resolved. Treating keratitis is a challenge because both infection and inflammation need to be addressed. An additional challenge is to maintain a therapeutic dose at the corneal surface as blinking and tear film wash away the drugs, administered as eye drops...
July 20, 2017: Nanoscale
https://www.readbyqxmd.com/read/28658821/intracorneal-amphotericin-b-injection-in-a-case-of-indolent-candidal-keratitis
#6
Jyoti Deswal, Sudesh Kumar Arya
Ocular candidiasis is one of the opportunistic infection occurring in human body. Pathogenesis wise, Candida is very virulent and slow growing organism. We report a case of 76-year-old female with left eye candidal stromal abscess, not responding to topical and oral antifungal drugs. Patient was administered intrastromal amphotericin B injection in the affected eye. Four midstromal injections were given in the areas surrounding the corneal abscess. A total of approximately 0.05 mL of amphotericin B, 5 μg per 0...
May 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28632575/clinical-profile-etiology-and-outcome-of-infantile-ocular-trauma-a-developing-country-perspective
#7
Vedang D Shah, Madhu Uddaraju, Amitabh Singh, Rashmi Ranjan Das
OBJECTIVE: The aim of this article was to study the clinical profile, etiology, and outcome of infantile ocular trauma in a developing country setting. METHODS: A retrospective study on corneal trauma in infants (≤12 months old) was undertaken in a tertiary care hospital during a 2-year period. An analysis of clinical profile, etiology, microbiological profile, clinical course, and outcome was studied. RESULTS: Seventy-six infants were included...
June 20, 2017: Pediatric Emergency Care
https://www.readbyqxmd.com/read/28631638/clinicomicrobiological-profile-of-endophthalmitis-a-10-year-experience-in-a-tertiary-care-center-in-north-india
#8
Gita Satpathy, Niranjan Nayak, Meenakshi Wadhwani, Pradeep Venkwatesh, Atul Kumar, Yograj Sharma, Vishnu Sreenivas
PURPOSE: To determine the clinicomicrobiological profile of infectious agents and their antibiotic susceptibility in different type of endophthalmitis. METHODS: A retrospective review of clinical and microbiological records from January 2001 to December 2010, was performed in 1110 patients diagnosed with different type of endophthalmitis (postoperative, posttraumatic, endogenous and post keratitis) to record the demographic details, clinical presentations; microbiological agents isolated with their antimicrobial sensitivity pattern...
April 2017: Indian Journal of Pathology & Microbiology
https://www.readbyqxmd.com/read/28611646/corneal-cross-linking-as-a-treatment-for-fungal-keratitis-associated-with-corneal-melting
#9
Vadim Igal, Yael Sara Pikkel Igal, Yoav Yechezkel Pikkel
We present the case of a young male that suffered from fungal corneal abscess and corneal melting. The patient was treated successfully by corneal cross-linking. Taking into account our experience from this case, we offer to consider corneal cross-linking as a therapeutic option in cases of fungal keratitis.
January 2017: Case Reports in Ophthalmology
https://www.readbyqxmd.com/read/28603237/-contact-lens-related-fusarium-keratitis-a-case-report
#10
Silvia Amadasi, Giovanni Federico Pelliccioli, Paolo Colombini, Annalisa Bonomini, Claudio Farina, Filomena Pietrantonio, Palmino Pedroni
We aim to highlight the key factors for a good outcome of fungal keratitis. We describe a case of contact lens-related Fusarium keratitis in a young girl. After identification of Fusarium spp under direct microscopic examination and in culture, a prolonged treatment with topic natamycin 5% was started and administered for five months with restitutio ad integrum of the eye. Prompt microbiological diagnosis and a specific and prolonged treatment are essential for correct management of Fusarium keratitis.
June 1, 2017: Le Infezioni in Medicina
https://www.readbyqxmd.com/read/28599020/isg15-in-host-defense-against-candida-albicans-infection-in-a-mouse-model-of-fungal-keratitis
#11
Chen Dong, Nan Gao, Bing X Ross, Fu-Shin X Yu
Purpose: ISG15, a di-ubiquitin-like protein, is critical for controlling certain viral and bacterial infections. We sought to determine if ISG15 plays a role in corneal innate immunity against Candida albicans (C. albicans) using a C57BL/6 (B6) mouse model of human fungal keratitis. Methods: Scarified corneas of adult B6 mice were pretreated with TLR5 ligand flagellin and then inoculated with C. albicans. The expression of ISG15 and other genes involved in ISG15 conjugation (ISGylation) was determined by real-time PCR...
June 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28582375/pythium-insidiosum-keratitis-histopathology-and-rapid-novel-diagnostic-staining-technique
#12
Ruchi Mittal, Shipra K Jena, Alisha Desai, Sunil Agarwal
PURPOSE: To elucidate the histopathology of Pythium insidiosum keratitis and to describe a novel, simple, and rapid staining technique for identification of oomycete Pythium insidiosum and to differentiate it from fungi. METHODS: This is a laboratory investigation study of 38 nonconsecutive cases (37 ocular samples and 1 colonic biopsy); 14 microbiologically diagnosed as Pythium insidiosum keratitis and 24 as fungal keratitis. Review of clinical, demographic details, microbiological results, and identification of cases that necessitated evisceration was performed...
June 2, 2017: Cornea
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
#13
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
#14
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
https://www.readbyqxmd.com/read/28524886/fungal-keratitis-in-the-republic-of-ireland
#15
S Farrell, E McElnea, S Moran, S Knowles, C C Murphy
PurposeFungal keratitis is relatively rare in temperate climates with only one previous population-based study, which reported a minimum annual incidence of 0.32 per million population in the United Kingdom. We performed a nationwide study in the Republic of Ireland of cases over a 6-year period to establish the incidence, risk factors, treatment, and outcomes of fungal keratitis.Patients and methodsAll corneal scraping specimens positive for fungal species over a 6-year period were identified at the microbiology departments of the seven main ophthalmology units in the Republic of Ireland...
May 19, 2017: Eye
https://www.readbyqxmd.com/read/28520596/fungal-keratitis-associated-with-airborne-organic-debris-and-soft-contacts-lenses-case-reports-and-review-of-the-literature
#16
Michael J Hodkin, Ryan C Gustus
OBJECTIVES: To report two cases of fungal keratitis in soft contact lens wearers who were exposed to environmental mold. METHODS: Case reports, with review of the relevant literature. RESULTS: Two otherwise healthy middle-aged women who were soft contact lens wearers developed fungal keratitis about 1 week after heavy exposure to environmental mold. Culture results showed Aspergillus from one patient and the unusual combination of Trichoderma and Penicillium from the other...
May 16, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/28503064/combined-intrastromal-injection-of-amphotericin-b-and-topical-fluconazole-in-the-treatment-of-resistant-cases-of-keratomycosis-a-retrospective-study
#17
Waled Mahdy Nada, Mahmoud A Al Aswad, Wael M El-Haig
PURPOSE: To evaluate the efficacy of combination therapy of a single intrastromal injection of amphotericin B and topical fluconazole in resistant cases of fungal keratitis, and also topical amphotericin B as monotherapy in terms of the duration of the recovery period and toxic drug effects. METHODS: This retrospective 2-year study reviewed 68 cases of unilateral fungal keratitis diagnosed by clinical features and positive laboratory culture results. Forty-one cases were resistant and did not respond to monotherapy with an antifungal agent...
2017: Clinical Ophthalmology
https://www.readbyqxmd.com/read/28484310/a-dot-hybridization-assay-for-the-diagnosis-of-bacterial-keratitis
#18
Po-Chiung Fang, Chun-Chih Chien, Hun-Ju Yu, Ren-Wen Ho, Shin-Ling Tseng, Yu-Hsuan Lai, Ming-Tse Kuo
PURPOSE: To evaluate a bacterial dot hybridization (BDH) assay for the diagnosis of bacterial keratitis (BK). METHODS: Sixty-one qualified corneal scrapings from 61 patients with suspected microbial keratitis were collected consecutively and prospectively. Among the 61 patients, 16 cases were BK and 45 cases were non-BK, including fungal keratitis, viral keratitis, parasitic keratitis, and non-microbial keratitis. Molecular diagnosis of BK in these corneal scrapes was performed using the BDH assay with three universal bacterial probes (PB1, PB2, and PB3) and three genus-specific probes (Aci, Klb, and Psu) to detect Acinetobacter, Klebsiella, and Pseudomonas, respectively...
2017: Molecular Vision
https://www.readbyqxmd.com/read/28470344/mitogenic-lectins-from-cephalosporium-curvulum-csl-and-aspergillus-oryzae-aol-mediate-host-pathogen-interactions-leading-to-mycotic-keratitis
#19
Suhas Ballal, Shivakumar Belur, Preeti Laha, Sanhita Roy, B M Swamy, Shashikala R Inamdar
A core-fucose-specific lectin, CSL from Cephalosporium curvulum, has been reported earlier. Here we assign the role for CSL and another lectin AOL, from pathogenic fungus Aspergillus oryzae, in causing mycotic keratitis. CSL and AOL show strong binding to immortalized and primary human corneal epithelial cells (HCECs) which are inhibited by asialofetuin, confirming their glycan-mediated binding. CSL and AOL showed increase in viability at lower concentrations (0.07 µg/ml) whereas at higher concentrations (0...
May 3, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/28460048/role-of-pattern-recognition-receptors-in-the-modulation-of-antimicrobial-peptide-expression-in-the-corneal-epithelial-innate-response-to-f-solani
#20
Satya Sree Kolar, Hasna Baidouri, Alison M McDermott
Purpose: Fusarium solani (F. solani) keratitis is a potentially sight-threatening fungal infection of the cornea. Antimicrobial peptides (AMPs), such as human β-defensins (hBDs) and cathelicidins, essential components of the immune system, likely have a protective role against F. solani keratitis. We examined the role of pattern recognition receptors (PRRs), Dectin-1, and TLR2 in F. solani-induced modulation of AMP expression in vitro. Methods: Human corneal epithelial cells (HCECs) were exposed to heat-inactivated F...
May 1, 2017: Investigative Ophthalmology & Visual Science
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