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pseudomonas keratitis

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https://www.readbyqxmd.com/read/28993066/clinical-and-microbiological-profile-of-infectious-keratitis-in-an-area-of-madrid-spain
#1
Soraya Mediero, Ana Boto de Los Bueis, Karina Spiess, Mariana Díaz-Almirón, Almudena Del Hierro Zarzuelo, Isabel Villalaín Rodes, Adela García Perea
INTRODUCTION: To study antibiotic susceptibility in bacterial keratitis (BK), its profile over 10 years and its influence on ophthalmological practice. METHODS: Retrospective review of BK with positive corneal scraping over a 10-year period. Risk factors for keratitis, visual acuity (VA), empirical topical treatment, corneal infection characteristics and outcomes were analyzed for BK due to Staphylococcus aureus, Staphylococcus epidermidis, Streptococcus pneumoniae, Pseudomonas aeruginosa and Propionibacterium acnes...
October 6, 2017: Enfermedades Infecciosas y Microbiología Clínica
https://www.readbyqxmd.com/read/28980569/-severe-bilateral-pseudomonas-sclerokeratitis-in-comatose-patient-clinical-case
#2
Evg A Kasparova, A A Kasparov, E A Kasparova, A V Zaytsev
The article presents a clinical case of severe bilateral pseudomonas sclerokeratitis in a patient with occlusion hydrocephalus and intracranial hypertension, who was in a coma and on a ventilator for 20 days. At first examination (7 days after the onset of purulent keratitis, during which the process had been rapidly progressing), the clinical picture included lagophthalmos, severe purulent corneal ulcer, bilateral purulent scleromalacia, perforated cornea in the left eye. On the same day, in order to maintain eye integrity, urgent reconstructive penetrating sclerokeratoplasty with subsequent sclerocorneal coating was performed in both eyes right in the intensive care unit...
2017: Vestnik Oftalmologii
https://www.readbyqxmd.com/read/28961278/nlrc4-regulates-caspase-1-and-il-1beta-production-in-a-cd11blowly6glow-population-of-cells-required-for-resistance-to-pseudomonas-aeruginosa-keratitis
#3
Sharon A McClellan, Andrew Jerome, Susmit Suvas, Linda D Hazlett
Psbetaeudomonas (P.) aeruginosa infection of the cornea in BALB/c mice does not result in perforation and the mice have been classified as resistant. However, regulation of this response via inflammasome activation remained untested. Therefore, BALB/c mice were infected with P. aeruginosa ATCC strain 19660 and NLRP3 and NLRC4 protein tested by ELISA. Since NLRC4 vs NLRP3 protein levels were significantly higher in the corneas of BALB/c at 1 and 5 days postinfection we used silencing to knockdown NLRC4. Silencing NLRC4 vs scrambled siRNA treatment exacerbated disease in BALB/c mice, reduced myeloperoxidase levels and elevated bacterial plate counts at 5 days postinfection...
2017: PloS One
https://www.readbyqxmd.com/read/28942073/update-on-the-management-of-infectious-keratitis
#4
REVIEW
Ariana Austin, Tom Lietman, Jennifer Rose-Nussbaumer
Infectious keratitis is a major global cause of visual impairment and blindness, often affecting marginalized populations. Proper diagnosis of the causative organism is critical, and although culture remains the prevailing diagnostic tool, newer techniques such as in vivo confocal microscopy are helpful for diagnosing fungus and Acanthamoeba. Next-generation sequencing holds the potential for early and accurate diagnosis even for organisms that are difficult to culture by conventional methods. Topical antibiotics remain the best treatment for bacterial keratitis, and a recent review found all commonly prescribed topical antibiotics to be equally effective...
September 20, 2017: Ophthalmology
https://www.readbyqxmd.com/read/28938380/bacterial-keratitis-in-toronto-a-16-year-review-of-the-microorganisms-isolated-and-the-resistance-patterns-observed
#5
Alex L C Tam, Elie Côté, Mario Saldanha, Alejandro Lichtinger, Allan R Slomovic
PURPOSE: To review the incidence, distribution, current trends, and resistance patterns of bacterial keratitis isolates in Toronto over the past 16 years. METHODS: Microbiology records of suspected bacterial keratitis that underwent a diagnostic corneal scraping and cultures from January 1, 2000, through December 31, 2015, were retrospectively reviewed. The distribution of the main isolated pathogens and in vitro laboratory minimum inhibitory concentration testing results were used to identify resistance patterns...
September 21, 2017: Cornea
https://www.readbyqxmd.com/read/28926883/-etiological-analysis-and-in-vitro-drug-sensitivity-of-bacterial-keratitis-in-northern-china-in-the-period-of-2006-2015
#6
Y Zhang, Z Q Wang, X G Sun
Objective: To analyze the etiology and drug sensitivity of bacterial keratitis and their changes, and to provide evidence for treatment and drug selection of bacterial keratitis. Methods: Retrospective case series study. From January 2006 to December 2015, corneal specimens suspected of bacterial infection were collected and cultured in Beijing Tongren Eye Center. General information of patients, etiological results and drug sensitivity test results were summarized and analyzed. The Chi-square test and Spearman correlation analysis were performed using SPSS 20...
September 11, 2017: [Zhonghua Yan Ke za Zhi] Chinese Journal of Ophthalmology
https://www.readbyqxmd.com/read/28919333/status-of-the-effectiveness-of-contact-lens-disinfectants-in-malaysia-against-keratitis-causing-pathogens
#7
Farhat Abjani, Naveed Ahmed Khan, Suk Yul Jung, Ruqaiyyah Siddiqui
The aim of this study was (i) to assess the antimicrobial effects of contact lens disinfecting solutions marketed in Malaysia against common bacterial eye pathogens and as well as eye parasite, Acanthamoeba castellanii, and (ii) to determine whether targeting cyst wall would improve the efficacy of contact lens disinfectants. Using ISO 14729 Stand-Alone Test for disinfecting solutions, bactericidal and amoebicidal assays of six different contact lens solutions including Oxysept(®), AO SEPT PLUS, OPTI-FREE(®) pure moist(®), Renu(®) fresh™, FreshKon(®) CLEAR and COMPLETE RevitaLens™ were performed using Manufacturers Minimum recommended disinfection time (MRDT)...
September 15, 2017: Experimental Parasitology
https://www.readbyqxmd.com/read/28892949/corneal-collagen-cross-linking-for-treatment-of-bacterial-and-herpetic-keratitis
#8
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/28878761/effect-of-different-antibiotic-chemotherapies-on-pseudomonas-aeruginosa-infection-in-vitro-of-primary-human-corneal-fibroblast-cells
#9
Maria Del Mar Cendra, Myron Christodoulides, Parwez Hossain
Pseudomonas aeruginosa is a major cause of bacterial keratitis (BK) worldwide. Inappropriate or non-optimal antibiotic chemotherapy can lead to corneal perforation and rapid sight loss. In this study, we tested the hypothesis that P. aeruginosa strain PAO1 invades primary human corneal fibroblasts (hCFs) in vitro and persists intracellularly, despite chemotherapy with antibiotics used commonly to treat BK. In rank order, ciprofloxacin, levofloxacin and polymyxin B showed the highest activity against planktonic PAO1 growth (100% inhibitory concentration ≤10 μg/mL; 50% inhibitory concentration ≤1 μg/mL), followed by gentamicin and ofloxacin (100% inhibitory concentration ≤50 μg/mL; 50% inhibitory concentration ≤10 μg/mL)...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28832498/corneal-fibroblasts-as-sentinel-cells-and-local-immune-modulators-in-infectious-keratitis
#10
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/28731142/nlrc3-promotes-host-resistance-against-pseudomonas-aeruginosa-induced-keratitis-by-promoting-the-degradation-of-irak1
#11
Litao Guo, Qingzhu Kong, Zhijun Dong, Weili Dong, Xiaoxiao Fu, Leqi Su, Xiaobo Tan
Pseudomonas aeruginosa (PA)-induced keratitis is one of the most common and destructive bacterial diseases. The pathogenesis of PA infections is closely associated with excessive inflammatory responses. Nucleotide oligomerization domain (NOD)-like receptor (NLR) family with caspase activation and recruitment domain (CARD) containing 3 (NLRC3) protein has been implicated as a negative regulator of inflammation and antiviral response, but the role of NLRC3 in PA-induced keratitis has not been described...
July 20, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/28721848/evaluation-of-biofilm-specific-antimicrobial-resistance-genes-in-pseudomonas-aeruginosa-isolates-in-farabi-hospital
#12
Mahmood Saffari, Shabnam Karami, Farzaneh Firoozeh, Mojtaba Sehat
BACKGROUND: Biofilm produced from Pseudomonas aeruginosa is the cause of infection induced by contact lenses, trauma and post-surgery infection. The aim of this study was to evaluate biofilm formation and the presence of the genes ndvB and tssC1 in ocular infection isolates of P. aeruginosa. METHODS: A total of 92 P. aeruginosa strains were collected from patients with ocular infection referred to Farabi Hospital between March 2014 and July 2015. Antibiotic susceptibility patterns were evaluated by the agar disc-diffusion method according to CLSI guidelines...
July 2017: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/28708218/microbial-characteristics-of-posttraumatic-infective-keratitis
#13
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/28677399/super-cationic-carbon-quantum-dots-synthesized-from-spermidine-as-an-eye-drop-formulation-for-topical-treatment-of-bacterial-keratitis
#14
Hong-Jyuan Jian, Ren-Siang Wu, Tzu-Yu Lin, Yu-Jia Li, Han-Jia Lin, Scott G Harroun, Jui-Yang Lai, Chih-Ching Huang
We have developed a one-step method to synthesize carbon quantum dots (CQDPAs) from biogenic polyamines (PAs) as an antibacterial agent for topical treatment of bacterial keratitis (BK). CQDs synthesized by direct pyrolysis of spermidine (Spd) powder through a simple dry heating treatment exhibit a solubility and yield much higher than those from putrescine and spermine. We demonstrate that CQDs obtained from Spds (CQDSpds) possess effective antibacterial activities against non-multidrug-resistant Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa, and Salmonella enterica serovar Enteritidis bacteria and also against the multidrug-resistant bacteria, methicillin-resistant S...
July 25, 2017: ACS Nano
https://www.readbyqxmd.com/read/28631638/clinicomicrobiological-profile-of-endophthalmitis-a-10-year-experience-in-a-tertiary-care-center-in-north-india
#15
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/28573109/persistence-of-innate-immune-pathways-in-late-stage-human-bacterial-and-fungal-keratitis-results-from-a-comparative-transcriptome-analysis
#16
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/28534320/infectious-keratitis-and-orthokeratology-lens-use-a-systematic-review
#17
REVIEW
Ka Wai Kam, Wing Yung, Gabriel Ka Hin Li, Li Jia Chen, Alvin L Young
PURPOSE: Myopia is a prevalent condition among Asians. Orthokeratology lens has gained popularity as a method of myopia control. This systematic review is to summarize the clinical profile of infectious keratitis in association with orthokeratology lens wear. METHODS: We searched in the PubMed and EMBASE for articles adopting the search strategy "(orthokeratology lens OR orthokeratology) AND (bacterial eye infection OR keratitis OR cornea ulcer OR microbial keratitis OR bacterial keratitis)", from the start date of the databases to August 23, 2016...
May 22, 2017: Infection
https://www.readbyqxmd.com/read/28506643/epithelial-basement-membrane-injury-and-regeneration-modulates-corneal-fibrosis-after-pseudomonas-corneal-ulcers-in-rabbits
#18
Gustavo K Marino, Marcony R Santhiago, Abirami Santhanam, Luciana Lassance, Shanmugapriya Thangavadivel, Carla S Medeiros, Karthikeyan Bose, Kwai Ping Tam, Steven E Wilson
The purpose of this study was to investigate whether myofibroblast-related fibrosis (scarring) after microbial keratitis was modulated by the epithelial basement membrane (EBM) injury and regeneration. Rabbits were infected with Pseudomonas aeruginosa after epithelial scrape injury and the resultant severe keratitis was treated with topical tobramycin. Corneas were analyzed from one to four months after keratitis with slit lamp photos, immunohistochemistry for alpha-smooth muscle actin (α-SMA) and monocyte lineage marker CD11b, and transmission electron microscopy...
August 2017: Experimental Eye Research
https://www.readbyqxmd.com/read/28484310/a-dot-hybridization-assay-for-the-diagnosis-of-bacterial-keratitis
#19
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/28469996/signaling-mediated-by-toll-like-receptor-5-sensing-of-pseudomonas-aeruginosa-flagellin-influences-il-1%C3%AE-and-il-18-production-by-primary-fibroblasts-derived-from-the-human-cornea
#20
Maria Del Mar Cendra, Myron Christodoulides, Parwez Hossain
Pseudomonas aeruginosa is the principal cause of bacterial keratitis worldwide and overstimulation of the innate immune system by this organism is believed to contribute significantly to sight loss. In the current study, we have used primary human corneal fibroblast (hCF) cells as an ex vivo model of corneal infection to examine the role of P. aeruginosa flagellum and type three secretion system (TTSS) in inducing inflammasome-associated molecules that trigger IL-1β and IL-18 production during the early stages of the infection...
2017: Frontiers in Cellular and Infection Microbiology
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