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Microbiology keratitis

Michael Politis, Denise Wajnsztajn, Boris Rosin, Colin Block, Abraham Solomon
PURPOSE: To describe the trends in pathogens and antibacterial resistance of corneal culture isolates in infectious keratitis during a period of 13 years at Hadassah-Hebrew University Medical Center. METHODS: A Retrospective analysis of bacterial corneal isolates was performed during the months of January 2002 to December 2014 at Hadassah Hebrew University Medical Center. Demographics, microbiological data and antibiotic resistance and sensitivity were collected...
2016: PloS One
Pui Wai Rachel Kwok, Ka Wai Kam, Vishal Jhanji, Alvin L Young
PURPOSE: To report an atypical case of contact lens-related Acanthamoeba keratitis. CASE REPORT: A 15-year-old secondary school female student with a history of soft contact lens wear was referred to our hospital by a private general practitioner for management of right eye redness and discomfort for 2 weeks. Upon examination, the best-corrected visual acuity was 20/20 and 20/16 for her right and left eyes, respectively. There was diffuse radial keratoneuritis noted in the cornea of her right eye without any associated epithelial defect...
November 19, 2016: Optometry and Vision Science: Official Publication of the American Academy of Optometry
N Venkatesh Prajna, Tiruvengada Krishnan, Revathi Rajaraman, Sushila Patel, Muthiah Srinivasan, Manoranjan Das, Kathryn J Ray, Kieran S O'Brien, Catherine E Oldenburg, Stephen D McLeod, Michael E Zegans, Travis C Porco, Nisha R Acharya, Thomas M Lietman, Jennifer Rose-Nussbaumer
Objective: To compare oral voriconazole with placebo in addition to topical antifungals in the treatment of filamentous fungal keratitis. Design, Setting, and Participants: The Mycotic Ulcer Treatment Trial II (MUTT II), a multicenter, double-masked, placebo-controlled, randomized clinical trial, was conducted in India and Nepal, with 2133 individuals screened for inclusion. Patients with smear-positive filamentous fungal ulcers and visual acuity of 20/400 (logMAR 1...
October 27, 2016: JAMA Ophthalmology
Rusheng Chew, Andrew Dorman, Marion L Woods
OBJECTIVE: To describe the clinical features and risk factors of and optimal antifungal therapy for Purpureocillium lilacinum keratitis. DESIGN: Retrospective case series in a quaternary referral hospital setting. METHODS: Comprehensive chart review of patients diagnosed with P. lilacinum keratitis in the past 10 years. PARTICIPANTS: Four patients were identified. All were aged 60 years or greater, with none having prior ocular trauma...
October 2016: Canadian Journal of Ophthalmology. Journal Canadien D'ophtalmologie
David T Truong, Minh-Thuy Bui, H Dwight Cavanagh
PURPOSE: To review the epidemiology, risk factors, microbiologic spectrum, and treatment of microbial keratitis during a 5-year period at an urban public hospital in comparison with an adjacent private university practice. METHODS: Retrospective chart review in the 5-year interval, 2009 through 2014. Primary outcome measures included patient age at presentation, best-corrected visual acuity (BCVA), risk factors, culture and sensitivities, treatment, and complication occurrence...
October 7, 2016: Eye & Contact Lens
Winai Chaidaroon, Sumet Supalaset, Napaporn Tananuvat, Nongnuch Vanittanakom
PURPOSE: To report a rare case of keratitis infected by Bipolaris hawaiiensis. METHODS: A patient who was diagnosed as fungal keratitis caused by B. hawaiiensis was retrospectively reviewed for history, clinical characteristics, risk factors, laboratory findings, treatments, and outcomes. RESULTS: A 63-year-old man with a history of trauma and saw dust in the left eye presented with a corneal ulcer. Eye examination revealed whitish infiltration with a feathery edge and small brownish deposits in the anterior stroma of the left cornea...
May 2016: Case Reports in Ophthalmology
Shreesha Kumar Kodavoor, Ramamurthy Dandapani, Ajay Ramesh Kaushik
A 32-year-old female patient underwent deep anterior lamellar keratoplasty (DALK) in both eyes for advanced keratoconus. She developed an infiltrate in the nasal paracentral interface of the left eye. In view of the paracentral location, localized epithelial removal/stromal scraping was done and the infiltrate was removed using forceps and sent for microbiological assay, which revealed fungal filaments. The patient successfully responded to intensive topical antifungal therapy with the maintenance of visual acuity...
August 2016: Indian Journal of Ophthalmology
Chia-Yi Lee, Yi-Ju Ho, Chi-Chin Sun, Hsin-Chiung Lin, Ching-Hsi Hsiao, David Hui-Kang Ma, Chi-Chun Lai, Hung-Chi Chen
Aspergillus species produces a wide spectrum of fungal diseases like endophthalmitis and fungal keratitis ophthalmologically, but there has been no report about blepharitis caused by Aspergilus flavus to date. Herein, we report a 61-year-old ethnic Han Taiwanese male who had suffered from pain with burning and foreign body sensation after an insect bite on his left eye. Specimens from bilateral eyelids suggested infection of A. flavus, whereas corneal scraping showed the presence of Gram-negative bacteria. He was admitted for treatment of infectious keratitis with topical antibiotic and antifungal eye drops...
November 2, 2016: American Journal of Tropical Medicine and Hygiene
I-Huang Lin, Yi-Sheng Chang, Sung-Huei Tseng, Yi-Hsun Huang
Infectious keratitis after penetrating keratoplasty (PK) is a devastating condition that may result in graft failure and poor visual outcome. In this study, we retrospectively reviewed the medical records of patients who underwent PK between 2009 and 2014, and recorded those who developed infectious keratitis. We compared the predisposing factors and organisms isolated to those identified in our previous study, conducted between 1989 and 1994. The incidence of post-PK infectious keratitis decreased from 11...
September 2, 2016: Scientific Reports
Carla Sofia Ferreira, Luis Figueira, Nuno Moreira-Gonçalves, Raúl Moreira, Luis Torrão, Fernando Falcão-Reis
OBJECTIVES: To study the microbial profile, antibiotic susceptibility pattern, risk factors, therapeutic trends, and clinical outcomes for microbial keratitis (MK) in a tertiary health care center. METHODS: All cases with suspected bacterial keratitis that were followed at consultation from September 2007 to August 2015 were included. Microbial cultures were obtained and patients were managed following an internal protocol. RESULTS: Two hundred thirty-five patients were included, with a mean age of 50...
July 12, 2016: Eye & Contact Lens
Jaya D Chidambaram, Namperumalsamy V Prajna, Natasha L Larke, Srikanthi Palepu, Shruti Lanjewar, Manisha Shah, Shanmugam Elakkiya, Prajna Lalitha, Nicole Carnt, Minna H Vesaluoma, Melanie Mason, Scott Hau, Matthew J Burton
PURPOSE: To determine the diagnostic accuracy of in vivo confocal microscopy (IVCM) for moderate to severe microbial keratitis (MK). DESIGN: Double-masked prospective cohort study. PARTICIPANTS: Consecutive patients presenting to Aravind Eye Hospital, Madurai, India, between February 2012 and February 2013 with MK (diameter ≥3 mm, excluding descemetocele, perforation, or herpetic keratitis). METHODS: Following examination, the corneal ulcer was scanned by IVCM (HRT3/RCM, Heidelberg Engineering, Heidelberg, Germany)...
August 15, 2016: Ophthalmology
Anup K Ghosh, Amit Gupta, Shivaprakash M Rudramurthy, Saikat Paul, Vinay Kumar Hallur, Arunaloke Chakrabarti
To assess the prevalence of fungal keratitis, we conducted a retrospective study over 7 years (2005 through 2011) at a tertiary care center in North India. Effort has been made to analyze the disease burden, spectrum of agents and treatment history. The findings were compared with an earlier study at the same center for any change in the epidemiology of the disease. Microbiology records were screened at the Postgraduate Institute of Medical Education and Research, Chandigarh, India, to identify fungal keratitis cases, and available clinical records of those cases were analyzed...
July 29, 2016: Mycopathologia
Swapnali Sabhapandit, Somasheila I Murthy, Prashant Garg, Veeresh Korwar, Geeta K Vemuganti, Savitri Sharma
PURPOSE: To describe the history, clinical features, and outcomes of a large case series of microsporidial stromal keratitis with emphasis on probable predictors of the etiology in this rare and unspecified form of keratitis. METHODS: Retrospective analysis of cases seen between January, 2002, and December, 2013, diagnosed at LV Prasad Eye Institute as having microsporidial stromal keratitis based on clinical, microbiology, and histopathology examination. Outcomes of medical and surgical management with visual recovery were documented...
July 27, 2016: Cornea
Ashok Kumar Reddy, Rangaiahgari Ashok, Madhavi Majety, Megharaj Chitta, Nitesh Narayen
Fungal keratitis due to Schizophyllum commune is very rare. In this study, we report the clinical and microbiological profile of five patients with fungal keratitis due to S. commune. Direct microscopic examination of corneal scrapings from all five patients showed septate branching hyaline fungal filaments. Similarly, in all five patients Sabouraud dextrose agar (SDA) plates inoculated with corneal scrapings showed white, cottony colonies on the second day of incubation. Lactophenol cotton blue stained wet preparation of 7-day-old colonies on SDA revealed clamp connections and no spores...
July 12, 2016: Mycoses
Eric C Ledbetter, Patrick L McDonough, Kay Kim
OBJECTIVE: To describe clinical, in vivo confocal microscopic, histopathologic, and microbiologic features of canine and feline cases of infectious crystalline keratopathy (ICK). ANIMALS STUDIED: Six dogs and two cats with naturally acquired ICK. PROCEDURES: Medical records of dogs and cats with a clinical diagnosis of ICK were reviewed. Signalment, medical history, clinical findings, and diagnostic evaluations were retrieved, including corneal cytology, histopathology, in vivo confocal microscopy, and microbiology results...
June 29, 2016: Veterinary Ophthalmology
Ana Lara Oya, María Eloisa Medialdea Hurtado, María Dolores Rojo Martín, Antonia Aguilera Pérez, Ana Alastruey-Izquierdo, Consuelo Miranda Casas, Marina Rubio Prats, Santiago Medialdea Marcos, José María Navarro Marí
Fungal keratitis is a severe ocular infection that primarily affects subjects engaged in outdoor activities. Risk factors include allergic conjunctivitis, previous eye surgery, previous treatment with wide-spectrum antimicrobial agents and corticosteroids and using contact lenses. Corneal infection is usually secondary to trauma involving organic material, which is often the only predisposing factor. Early diagnosis based on clinical examination and microbiological investigation (microscopy, cultures and molecular techniques) is crucial to selecting the appropriate antifungal therapy and prevent progression...
October 2016: Mycopathologia
Mahmood Nejabat, Nafiseh Yaqubi, Amir Khosravi, Kamiar Zomorodian, Mohammad Javad Ashraf, Ramin Salouti
Purpose. Evaluating the therapeutic effect of topical and intrastromal voriconazole and topical natamycin on Fusarium keratitis. Methods. 24 rabbits were selected. The stroma of their corneas was inoculated with suspension of Fusarium solani species complex. Seven days after injection they were divided into 4 groups randomly: the first group was treated with topical voriconazole (TV) 1% for one week, the second one with one-time intrastromal injection of voriconazole (ISV) 50 microgram/0.1 mL, and the third group with topical gel of natamycin (TN) for one week, and the last one did not receive any antifungal treatment...
2016: Journal of Ophthalmology
Surabhi Dutt, Manisha Acharya, Abha Gour, Neelam Sapra, Lokesh Chauhan, Umang Mathur
PURPOSE: To evaluate the efficacy of systemic and topical antiviral therapy in the treatment of active herpes simplex virus (HSV) necrotizing stromal keratitis (NSK). DESIGN: Prospective interventional case series. METHODOLOGY: Patients with a diagnosis of HSV NSK based on history and clinical findings were enrolled in the study. A standard protocol was used for microbiologic investigations. Ten weeks regime of systemic acyclovir and 2 weeks of topical acyclovir was given...
April 2016: Indian Journal of Ophthalmology
Sung A Lim, Kyung-Sun Na, Choun-Ki Joo
PURPOSE: Propionibacterium acnes is a commensal bacteria whose pathogenicity in infectious keratitis is unclear. In this study, we report infectious keratitis cultured with P. acnes and evaluate its clinical characteristics. METHODS: All cases of infectious keratitis submitted to the microbiology laboratory of St. Mary's Hospital of Seoul between January 2013 and April 2014 were reviewed. Nonpretreated cases that were positive for P. acnes were identified, and clinical characteristics and treatment outcomes were studied...
May 19, 2016: Eye & Contact Lens
Tewelde Tesfaye Gebremariam
BACKGROUND: In East Africa, particularly in Ethiopia, bacterial keratitis is a major cause of blindness. OBJECTIVE: The aims of this study were to identify risk factors of bacterial keratitis and the spectrum of bacterial etiologies, and to assess the in-vitro antimicrobial susceptibility of these bacterial isolates at Jimma University Specialized Hospital, Southwest Ethiopia. METHODS: A prospective study was employed from January 2012 to June 2012 from which a total of 24 patients with bacterial keratitis were included in the study...
October 2015: Ethiopian Medical Journal
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