Purpose: To characterize the bacterial and fungal flora colonizing the ocular surface of eyes with Boston type 1 keratoprosthesis (KPro) and to determine the prevalence of resistance to antibiotics. Culture positivity and antibiotic resistance rates in eyes with KPro are compared with those of eyes after penetrating keratoplasty (PKP) as well as control eyes.
Design: Cross-sectional, case-control study.
Participants And Controls: A total of 75 eyes of 75 patients (25 KPro eyes, 25 PKP eyes, and 25 control eyes) were recruited from the Centre Hospitalier de l'Université de Montréal (Université de Montréal, Montréal, Canada) Ophthalmology Department.
Methods: The inferior bulbar conjunctiva was sampled using calcium alginate swabs. Standard culture media and protocols were used to identify colonizing bacteria and fungi. Extensive antibiotic susceptibility testing was performed on every isolate. Patients completed a validated questionnaire evaluating adherence to antibiotic prophylaxis. Hospital charts were reviewed to identify risk factors for bacterial resistance.
Main Outcome Measures: Culture positivity rates and prevalence of resistance to fourth-generation fluoroquinolones (FQ).
Results: Bacterial cultures were positive in 64% of KPro eyes, 76% of PKP eyes, and 80% of control eyes (chi-square test; P = 0.41). Fungal cultures were negative in all but 1 eye with PKP. The most common isolates were Staphylococcus epidermidis, other coagulase-negative Staphylococci, and Corynebacterium species. At least 1 bacterial isolate resistant to fourth-generation FQ was found in 44% of eyes with KPro, 24% of eyes with PKP, and 8% of control eyes (chi-square test; P = 0.01). Patient adherence to antibiotic prophylaxis did not alter microbial susceptibility to fourth-generation FQ (odds ratio, 0.83; 95% confidence interval, 0.2-4.1).
Conclusions: Culture positivity rates and bacterial species composition were similar in KPro, PKP, and control eyes. Eyes with KPro were more likely to be colonized with FQ-resistant bacteria. Chronic prophylaxis with low-dose FQ is likely responsible for this increased antibiotic resistance. Modifications to the current prophylaxis regimen may be helpful in preventing further emergence of resistant pathogens.
Financial Disclosure(s): The authors have no proprietary or commercial interest in any of the materials discussed in this article.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.ophtha.2013.01.003 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Comparisons of oscillatory potentials and 30 Hz flicker electroretinograms for discriminating eyes with diabetic retinopathy from normal eyes.
Jpn J Ophthalmol
January 2025
Department of Ophthalmology, Dokkyo Medical University Saitama Medical Center, 2-1-50 Minami-Koshigaya Koshigaya, Saitama, 343-8555, Japan.
Purpose: To compare the amplitudes and implicit times of the oscillatory (OPs) of the full-field electroretinograms (ERGs) to those of the 30 Hz flicker ERGs in differentiating eyes with diabetic retinopathy (DR) from normal eyes.
Study Design: Single-center observational study.
Methods: Full-field ERGs were recorded in 55 patients with Type 2 diabetes mellitus (DM) and 20 normal control subjects.
Systemic TRPV4 inhibition worsens retinal response to acute intraocular pressure elevation in older but not younger mice.
Optom Vis Sci
January 2025
Department of Anatomy and Physiology, The University of Melbourne, Parkville, Victoria, Australia.
Significance: Previous evidence showed that transient receptor potential vanilloid 4 (TRPV4) inhibition was protective of retinal ganglion cell (RGC) loss after chronic intraocular pressure (IOP) elevation in young animals. However, the role of TRPV4 in mechanosensing IOP changes in the aging eye is not well understood.
Purpose: This study compared the recovery of retinal function and structure after acute IOP elevation in 3- and 12-month-old mouse eyes with and without TRPV4 inhibition.
A spiking neural network for active efficient coding.
Front Robot AI
January 2025
Life- and Neurosciences, Frankfurt Institute for Advanced Studies, Frankfurt am Main, Germany.
Biological vision systems simultaneously learn to efficiently encode their visual inputs and to control the movements of their eyes based on the visual input they sample. This autonomous joint learning of visual representations and actions has previously been modeled in the Active Efficient Coding (AEC) framework and implemented using traditional frame-based cameras. However, modern event-based cameras are inspired by the retina and offer advantages in terms of acquisition rate, dynamic range, and power consumption.
View Article and Find Full Text PDFCharacterization of LTBP2 mutation causing mitral valve prolapse.
Eur Heart J Open
January 2025
Department of Medicine, Cardiovascular Precision Medicine Center, Hadassah Hebrew University Medical Center, P.O. Box 12000, 9112001 Jerusalem, Israel.
Aims: Mitral valve prolapse (MVP) is a common valvular disorder associated with significant morbidity and mortality, with a strong genetic basis. This study aimed to identify a mutation in a family with MVP and to characterize the valve phenotype in LTBP2 knockout (KO) mice.
Methods And Results: Exome sequencing and segregation analysis were performed on a large family with MVP.
Improving sensory integration in Chinese children with moderate sensory integration challenges through engaging basketball training.
Front Psychol
January 2025
College for Health, Community, and Policy, The University of Texas at San Antonio, San Antonio, TX, United States.
Objective: This study aimed to evaluate the effectiveness of combining basketball training with a traditional sensory integration therapy (SIT) vs. a SIT alone in enhancing sensory integration capability among Chinese children diagnosed with mild challenges in sensory integration and sensory processing (CSISP).
Methods: This study comprised a Control group and an Experimental group, both undergoing a 10-week intervention (4 sessions/week, 45 min/session).
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!