Keratitis, an inflammatory disease of the eye, when neglected could lead to sight-threatening complications and ultimately blindness. Globally, over a million people are affected by keratitis annually. Keratitis has a microbial etiology and is caused by bacteria, fungi, viruses, etc. The present study compared the ocular surface fungal microbiome of healthy individuals and individuals with fungal keratitis. Fungal microbiomes from the conjunctival swabs of healthy individuals and from conjunctival swabs and corneal scrapings of individuals with fungal keratitis were generated using ITS2 region amplicons. Microbiomes were sequenced using Illumina MiSeq 2 × 250 base pair chemistry with a paired-end protocol. Based on Alpha diversity indices, phylum and genera level diversity, abundance differences, and heat map analysis, the fungal microbiomes of conjunctival swabs and corneal scrapings of individuals with fungal keratitis exhibited dysbiosis (alterations in the diversity and abundance) compared to the ocular surface microbiome of the healthy control individuals. This is the first report indicating dysbiosis in the fungal microbiome of conjunctival swabs and corneal scrapings in individuals with fungal keratitis. A total of 11 genera present in the majority of the eyes constituted the variable core ocular microbiome.
Download full-text PDF |
Source |
---|---|
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6780152 | PMC |
http://dx.doi.org/10.3390/microorganisms7090309 | DOI Listing |
Clin Ophthalmol
January 2025
Center of Excellence for Cornea and Stem Cell Transplantation, Department of Ophthalmology, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand.
Purpose: To develop a comprehensively deep learning algorithm to differentiate between bacterial keratitis, fungal keratitis, non-infectious corneal lesions, and normal corneas.
Methods: This retrospective study collected slit-lamp photos of patients with bacterial keratitis, fungal keratitis, non-infectious corneal lesions, and normal cornea. Causative organisms of infectious keratitis were identified by either positive culture or clinical response to single treatment.
J Ophthalmic Inflamm Infect
January 2025
School of medicine, Shahid Sadoughi University of Medical sciences, Yazd, Iran.
Introduction: Infectious keratitis is a rare but devastating complication following photorefractive keratectomy (PRK) that may lead to visual impairment. This study assessed the clinical features, treatment strategies, and outcomes of post-PRK infectious keratitis.
Methods: This retrospective study was conducted on patients with post-PRK infectious keratitis presenting to Khalili Hospital, Shiraz, Iran, from June 2011 to March 2024.
J Med Microbiol
January 2025
Programa de Ps-Graduao em Cincias Farmacuticas, Faculdade de Farmcia, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil.
Ocular fungal infections are pathologies of slow progression, occurring mainly in the cornea, but can also affect the entire structure of the eyeball. The main aetiological agents are species of the genera and . Both diagnosis and treatment require speed and effectiveness.
View Article and Find Full Text PDFCornea
November 2024
External Diseases. Moorfield's Eye Hospital, London, United Kingdom.
Purpose: To describe and report the outcomes of allogeneic eccentric superficial anterior lamellar keratoplasty (SALK), a novel surgical technique, in the management of total bilateral limbal stem cell deficiency (LSCD).
Methods: Data were collected retrospectively on all patients with total bilateral LSCD who underwent SALK. Previous surgery, preexisting glaucoma, conjunctivalization, vascularization, lens status, and preoperative best-corrected visual acuity (BCVA) were collected from medical notes.
Viruses
November 2024
Department of Microbiology, University of Washington School of Medicine, Seattle, WA 98109, USA.
Certain species D human adenoviruses (HAdV-D19, -D37, and -D64) are causative agents of epidemic keratoconjunctivitis. HAdV-D37 has previously been shown to bind CD46 (membrane cofactor protein) and sialic acid as adhesion receptors. HAdV-D64 is genetically highly similar to HAdV-D37, with an identical fiber protein sequence, but differs substantially in its penton base and hexon proteins, two other major capsid components, due to genetic recombination.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!