Microbiological diagnosis of endophthalmitis using nanopore targeted sequencing

21^st Asia Pacific Ophthalmologists Annual Meeting

June 13, 2022 | Webinar

Yang Cheng

Huazhong University of Science and Technology, China

Scientific Tracks Abstracts: Clin Case Rep

Abstract :

Background: Microorganism identification is critical for the early diagnosis and management of infectious endophthalmitis, but traditional culture can yield false-negative results. Nanopore targeted sequencing (NTS) is a third-generation sequencing technique with multiple advantages. This study aimed to test aqueous humour or vitreous fluid samples from presumed cases of infectious endophthalmitis using NTS to evaluate the feasibility of NTS in diagnosing endophthalmitis, especially for culture-negative cases. Methods: This prospective study enrolled patients who presented to the Department of Ophthalmology of Union Hospital (Wuhan, China) between June 2018 and December 2020. The samples were sent immediately for routine microbiology culture processing and NTS assay. Results: NTS identified microorganisms in 17 of 18 cases (94.4%) (eight culturepositive cases, nine culture-negative cases, and one case unavailable for culture). There was a high-quality match between culture and NTS for culture-positive cases. In the nine culture-negative cases and the case unavailable for culture, NTS detected either bacteria, fungi, or a mixture of bacteria and fungi in the intraocular fluids. The average waiting times for the results of bacterial and fungal cultures were 48 and 72 h, respectively. The average time for the NTS results was 12 h. Conclusions: NTS appears to be a promising diagnostic platform for diagnosing infectious endophthalmitis, even for culture-negative cases. Keywords: culture, endophthalmitis, false-negative, nanopore targeted sequencing.

Biography :

Yang Cheng specializes in vitreoretinal microsurgery, phacoemulsification and intraocular lens implantation combined with vitreoretinal surgery, and has accumulated rich experience in the diagnosis and treatment of complex retinal detachment, eye trauma, intraocular foreign bodies, diabetic retinopathy and retinopathy of prematurity.In recent studies, a set of diagnosis and treatment procedures for patients with infectious endophthalmitis have been established by collecting intraocular.