Post Fever Retinitis Research Articles

Choroidal and central macular thickness before and after treatment in post fever retinitis.

To study the choroidal thickness (CT) and central macular thickness (CMT) in post-fever retinitis (PFR) and their correlation with visual acuity and treatment. A retrospective, observational study of patients presenting with PFR from 2013 to 2021 and with spectral domain optical coherence tomography (SD-OCT) (Heidelberg®, SpectralisTM, Heidelberg, Germany) images were included. The CT and CMT were measured at presentation and at the final visit. The CT was measured subfoveally and at points 2000 µm superior, inferior, medial, and lateral from the fovea using the caliper tool. Seventy-nine eyes of 65 patients were included for this study. The mean age was 39.03 (±16.00) years with female preponderance of 53.84% (n = 35). Mean follow-up duration was 30 days. Mean CT at presentation and at follow-up was 254.12 µm and 241.51 µm, respectively. CT was decreased in majority of the eyes 67.1% (n = 53) from their baseline value. Mean CMTs at presentation and final visit were 454.8 µm and 223.7 µm, respectively. Best corrected visual acuity had a positive correlation with CMT (r = 0.340; P = 0.002) and negligible correlation with CT. A significant decrease in the mean CT was noted in patients who received doxycycline either alone or in combination with a steroid as compared to those who did not receive any treatment (P < 0.001). The significance of which is unknown presently. CMT has a greater role in determining the final visual outcome than CT. CT can be reduced post-treatment with no effect on vision.

Vascular Changes in Eyes with Post-Fever Retinitis Pre and Post Treatment Demonstrated Using Optical Coherence Tomography Angiography

ABSTRACT Purpose To document vascular changes in eyes with post-fever retinitis (PFR) pre and post treatment demonstrated using optical coherence tomography angiography (OCTA). Methods This is a retrospective observational case series wherein patients with PFR were retrospectively evaluated for changes in the retinal vasculature during the course of disease using OCTA. Results At presentation, OCTA revealed flow void areas in superficial and deep capillary plexus (SCP and DCP) corresponding to the areas of retinitis. Post treatment, OCTA showed a significant decrease in the flow void areas with the appearance of new capillary network in both SCP and DCP. The optical coherence tomography also demonstrated normalization of retinal architecture over time. It is speculated that the good visual outcome in PFR could be attributed to the normalization of retinal architecture and remodelling in retinal vasculature. Conclusion OCTA being non-invasive can be used to understand and quantify the extent of vascular remodelling in PFR.

Post-fever Retinitis With a Positive Weil-Felix Test: A Study From a Tertiary Center in South India.

Background Post-fever retinitis (PFR) is reported two to six weeks after fever and affects one or both eyes. Rickettsial fever is one of the most common causes of PFR. This study aimed to report the clinical features and treatment outcomes of PFR cases with a positive Weil-Felix test. Methodology In this study, we collected demographic data, fever details, eye symptoms, ocular examination findings, optical coherence tomography (OCT) and fundus fluorescein angiography findings, laboratory findings, and length of follow-up of consecutive PFR cases with a positive Weil-Felix test. All cases were treated with oral doxycycline and prednisolone. Final best-corrected visual acuity (BCVA) and ocular examination findings were recorded. Visual field examination and follow-up OCT results were noted if available. Results A total of nine patients (eight males) with a mean age of 39.1 years with fever before ocular symptoms and positive Weil-Felix test were included.Six patients had bilateral disease. The mean initial and final BCVA in the affected eyes was 1.16 and 0.35 logMAR units, respectively (p < 0001). All 15 eyes had typical white retinitis patches and retinal hemorrhages which resolved after treatment. OCT showed hyperreflectivity and inner retinal disorganization over retinitis patches. White subretinal lines were noted in three patients and retinal nerve fiber bundle defect with corresponding visual field defect was seen in one eye. Conclusions In this study, PFR due to rickettsia infections has been reported from our region for the first time. Hence, eye specialists in the region should be aware of this entity.

Arteriolar occlusion in post-fever retinitis; Case report with review of literature

We report a rare association of retinal vascular occlusion in post-fever retinitis (PFR). A 58-year-old male presented with a vision of 3/60 in the right eye and 6/24 in the left eye 1 month after an episode of fever. Examination revealed vitritis (4+), cotton wool spots, venous beading and hemorrhages in both eyes, and retinal whitening superior and temporal to the fovea in the right eye suggestive of arteriolar occlusion. Optical coherence tomography (OCT) showed inner retinal hyperreflectivity, and OCT angiography showed flow-void areas corresponding to the area of whitening confirming occlusion. Our findings, together with those from previous studies, show that retinal vascular occlusive events, predominantly involving the arterial circulation, may complicate PFR.

Clinical Features of Post Fever Retinitis and Visual Outcomes with Oral Corticosteroids: A Retrospective Study

Introduction: Post Fever Retinitis (PFR) is an infectious or parainfectious uveitis presenting with visual impairment after a fever episode. The condition can cause potential visual impairment in these patients. There is no national guideline for treatment of PFR. Hence, there is a need to study the clinical features and visual outcomes with the use of corticosteroid therapy. Aim: To describe the clinical features of patients presenting with PFR and visual outcome with the oral corticosteroid therapy. Materials and Methods: This retrospective study conducted in the Outpatient Department (OPD) of Ophthalmology at SDM College of Medical Sciences and Hospital, Dharwad, Karnataka, India. The duration of the study was 35 months, from January 2019 to December 2021. A total of 23 eyes of 13 patients treated with oral corticosteroids were included. Data collected included patients’ demographic details including name, age, sex, hospital identification number, duration of vision loss, detailed ophthalmic examination findings, including visual acuity testing with Snellen’s chart, slit lamp examination findings and fundus examination findings including detailed fundus drawings, Optical Coherence Tomogram (OCT) and fundus photographs. Visual Acuity (VA) at the time of presentation and after steroid therapy were recorded. Data was entered in microsoft excel spreadsheet and descriptive analysis was done. Results: Age of the study participants ranged from 15 years to 52 years with an average of 29.6 years. A total of 23 eyes of 13 patients were included in the present study. At the time of presentation, two eyes had visual acuity better than 6/12 on Snellen’s chart. Five eyes had mild vision impairment, five eyes had moderate vision impairment and eleven eyes had vision &lt;3/60, according to the visual impairment classification of World Health Organisation (WHO). Macular oedema was the other most common finding seen in 12 (52.17%) eyes. All the patients showed beginning of resolution of retinitis by 2-3 weeks after starting oral corticosteroids. A total of 23 eyes, 8 (34.7%) eyes recovered vision &gt;6/12, out of which 6 eyes (26.08%) recovered with 6/6 vision. Conclusion: PFR affects predominantly young immunocompetent individuals. Treatment outcomes with oral steroids is found to be satisfactory

A Case of Post-Fever Retinitis in a Patient with Positive Lyme Borreliosis Serology

Background: Lyme Borreliosis accounts for less than 1% of all uveitis cases. The challenge in diagnosing Lyme-associated uveitis in a seropositive patient is determining whether the serology status is causative or incidental. We describe a case that illustrates this challenge: a post-fever retinitis in a patient with persistent positive Lyme serology. Case Presentation: A patient presented to the eye clinic with complaints of blur and foreign body sensation in his right eye after getting sawdust in his eye. Further lab workup was only remarkable for Lyme IgG and IgM and the patient was subsequently diagnosed with a post-fever retinitis. Management and Outcomes: The patient was treated with oral prednisone, and a subsequent IOP spike was managed with topical ocular hypotensive drops until the course of steroid therapy was completed. The uveitis resolved over seven weeks. Conclusions: Post-fever retinitis is a diagnosis of exclusion, and diagnosis can be challenging in the presence of positive serology for other known causes of uveitis. This case highlights the importance of detailed case history and clinical findings in determining alternative causes of uveitis in patients with positive LB serology. CE Notification: This article is available as a COPE accredited CE course. You may take this course for 1-hour credit. Read the article and take the qualifying test to earn your credit. Click here to Enroll (https://www.crojournal.com/a-case-of-post-fever-retinitis-in-a-patient-with-positive-lyme-borreliosis-serology) Please check COPE course expiry date prior to enrollment. The COPE course test must be taken before the course expiry date.

Clinical spectrum, disease course and management outcome of post-fever retinitis cases: experience from a tertiary eye institute in central India

PurposeTo report a series of five cases with retinitis following episodes of febrile illness, its evaluation, management and outcome.MethodRetrospective, consecutive case series of five patients presenting with acute retinitis, following a febrile illness.ResultsThe retinal lesions had a sudden onset with rapid evolution, preceded by a febrile episode within one month of presentation, in all cases. Extensive serology and PCR testing were non-contributory toward identifying the etiology and guiding therapy. Systemic corticosteroid therapy was effective in hastening the resolution of lesions.ConclusionPost-fever retinitis appears to be a distinct clinical form of acute hemorrhagic non-necrotizing retinitis without a uniformly identifiable cause, and some evidence pointing toward a para-infectious etiology secondary to flu-like illnesses. With an unusual morphological presentation and annual seasonal patterns in the endemic areas, it is important to differentiate this entity, from other forms of infectious retinitis, before initiating corticosteroid therapy.

Intraocular Viral Communities Associated With Post-fever Retinitis.

The virome of ocular fluids is naive. The results of this study highlight the virome in the vitreous fluid of the eye of individuals without any ocular infection and compare it with the virome of the vitreous fluid of individuals with retinitis. A total of 1,016,037 viral reads were generated from 25 vitreous fluid samples comprising control and post-fever retinitis (PFR) samples. The top 10 viral families in the vitreous fluids comprised of Myoviridae, Siphoviridae, Phycodnaviridae, Herpesviridae, Poxviridae, Iridoviridae, Podoviridae, Retroviridae, Baculoviridae, and Flaviviridae. Principal coordinate analysis and heat map analysis clearly discriminated the virome of the vitreous fluid of the controls from that of the PFR virome. The abundance of 10 viral genera increased significantly in the vitreous fluid virome of the post-fever retinitis group compared with the control group. Genus Lymphocryptovirus, comprising the human pathogen Epstein-Barr virus (EBV) that is also implicated in ocular infections was significantly abundant in eight out of the nine vitreous fluid viromes of post-fever retinitis group samples compared with the control viromes. Human viruses, such as Hepacivirus, Circovirus, and Kobuvirus, were also significantly increased in abundance in the vitreous fluid viromes of post-fever retinitis group samples compared with the control viromes. The Kyoto Encyclopedia of Genes and Genomes (KEGG) functional analysis and the network analysis depicted an increase in the immune response by the host in the post-fever retinitis group compared with the control group. All together, the results of the study indicate changes in the virome in the vitreous fluid of patients with the post-fever retinitis group compared to the control group.

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Commentary

Predictors of visual outcome in post-fever retinitis: a retrospective analysis.

To identify the predictors of final visual outcome in cases with post-fever retinitis (PFR). This is a retrospective study of cases with diagnosis of post-fever retinitis. Colour fundus photograph and optical coherence tomography (OCT) parameters at presentation and final visit were analysed. Various factors at presentation [age, systemic illness, best-corrected visual acuity (BCVA), area of retinitis and hard exudates, OCT parameters], at final visit (OCT parameters) and the treatment modalities used were correlated with BCVA at final visit. Twenty-four eyes of 16 patients with PFR were included in the study. Median BCVA at presentation was 6/60 and at final visit was 6/9. By multiple linear regression after adjusting for other variables, for every 1 unit increase in height of subretinal fluid (SRF) at fovea at presentation, the value of final BCVA decreased by 0.001 unit. For every 1 unit increase in extent of ellipsoid zone (EZ) loss and subfoveal deposit height, the value of final BCVA decreased by 0.0001 unit and 0.004 unit, respectively. The baseline OCT parameters that had negative correlation with final BCVA included central macular thickness (r: - 0.5182, p: 0.02), maximum SRF height (r: - 0.5539, p < 0.01) and SRF height at fovea (r: - 0.582, p < 0.01). The OCT parameters at final visit which had a negative correlation with final BCVA included disorganisation of retinal inner layers (DRIL) within 1000 microns from centre of fovea (r: - 0.6494, p < 0.01), height of subfoveal deposit (r: - 0.7627, p < 0.01), horizontal extent of subfoveal deposit (r: - 0.6695, p < 0.01) and extent of EZ loss (r: - 0.8216, p < 0.01). Height of SRF at presentation, extent of EZ loss and subfoveal deposit height at final visit were associated with poor final BCVA in PFR.

Optical coherence tomography angiography (OCTA) of retinal vasculature in patients with post fever retinitis: a qualitative and quantitative analysis

Post fever retinitis is a heterogenous entity that is seen 2–4 weeks after a systemic febrile illness in an immunocompetent individual. It may occur following bacterial, viruses, or protozoal infection. Optical coherence angiography (OCTA) is a newer non-invasive modality that is an alternative to fundus fluorescein angiography to image the retinal microvasculature. We hereby describe the vascular changes during the acute phase of post fever retinitis on OCTA. Imaging on OCTA was done for all patients with post fever retinitis at presentation with 3 × 3 mm and 8 × 8 mm scans centred on the macula and corresponding enface optical coherence tomography (OCT) scans obtained. A qualitative and quantitative analysis was done for all images. 46 eyes of 33 patients were included in the study. Salient features noted were changes in the superficial (SCP) and deep capillary plexus (DCP) with capillary rarefaction and irregularity of larger vessels in the SCP. The DCP had more capillary rarefaction when compared to the SCP. The foveal avascular zone (FAZ) was altered with an irregular perifoveal network. Our series of post fever retinitis describes the salient vascular features on OCTA. Although the presumed aetiology was different in all our patients, they developed similar changes on OCTA. While OCTA is not useful if there is gross macular oedema, the altered FAZ can be indicative of macular ischemia.

Clinical profile and response to steroids in post-fever retinitis: a nine-year experience from a referral institute in the rural hinterland of Central India.

To describe the demographics, clinical features, and treatment outcomes with systemic steroids in eyes presenting with post-fever retinitis (PFR) from Central India. Single-center, retrospective analysis of 147 eyes of 98 PFR cases between 2011 and 2019. Mean age of the study cohort was 33.46 ± 12.76years, with 72 males and 26 females. The mean interval between the onset of fever and the diminution of vision was 21.10 ± 13.54days (range 0-60days). The number of PFR cases increased over the nine years with 89 cases (90.1%) presenting during winters. Unilateral involvement was seen in 49 cases, while 49 had bilateral involvement. Clinical characteristics included: multifocal retinitis (n = 122; 61.2%), hemorrhages (n = 132; 89.8%), disc edema (n = 57; 38.8%), anterior chamber reaction (n = 28; 19%), and vitritis (n = 103; 70.1%). Treatment included intravenous followed by oral steroids in 70 patients and oral steroids exclusively in 23; five patients denied treatment. The visual acuity improved from 1.09 ± 0.52 LogMAR to 0.29 ± 0.42 LogMAR (p < 0.05). There has been an increase in the prevalence of PFR cases over the last decade with clustering during the winters. Multifocal retinitis, retinal hemorrhages, and vitritis were the most common clinical findings in our series. The retinitis resolved with improvement in vision following steroid therapy in all eyes.

Role of multicolour imaging in post-fever retinitis involving posterior pole.

To describe composite multicolour (MC) imaging features along with the monocoloured fundus reflectance images in active and resolving stages of post-fever retinitis (PFR). Retrospective image analysis of cases of PFR who underwent dilated retinal clinical examination followed by optical coherence tomography and MC imaging. Twenty-five eyes of 18 patients diagnosed with PFR were included. There were 11 males and 7 females. Mean age of patients was 30.63years. The retinitis lesion appeared bright white on MC image and white mainly on blue and green reflectance images during the active stages of PFR. The lesion appeared dull-grey to greyish white during the resolving stages and as dull-green in resolved cases. The active stages showed the presence of intraretinal/subretinal fluid which appeared as green colour on MC images and less green to normal during resolving stages. Hard exudates were seen as bright yellow- or orange-coloured spots on MC image during the resolving stages of the disease. The different stages of PFR show different colour on multicolour image and different reflectance patterns on individual colour reflectance channels. Hence, multimodal fundus imaging with different wavelength can be helpful for differentiation of activity in PFR.

SARS-CoV-2 Virus: A new addition to the checklist of investigations for post fever retinitis?

SARS-CoV-2 Virus: A new addition to the checklist of investigations for post fever retinitis? - IJCEO- Print ISSN No: - 2395-1443 Online ISSN No:- 2395-1451 Article DOI No:- 10.18231/j.ijceo.2021.037, Indian Journal of Clinical and Experimental Ophthalmology-Indian J Clin Exp Ophthalmol

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Mycobiome changes in the vitreous of post fever retinitis patients.

Fungi have been associated with various diseases of the eye like keratitis, uveitis and endophthalmitis. Despite this fact, fungal microbiome (mycobiome) studies compared to the bacterial microbiome studies have remained neglected. In the present study, using metagenomic sequencing, the mycobiomes of the vitreous of healthy control individuals (VC, n = 15) and individuals with post fever retinitis + non-PFR uveitis (PFR+, n = 9) were analysed and compared. The results indicated that Ascomycota was the most predominant phylum in both VC and PFR+ groups. Further, at the genera level it was observed that the abundance of 17 fungal genera were significantly different in post fever retinitis (PFR, n = 6) group compared to control group. Of these 17 genera, it was observed that 14 genera were relatively more abundant in PFR group and the remaining 3 genera in the VC group. Genus Saccharomyces, a commensal of the gut and skin, was predominantly present in the vitreous of both the cohorts, however it was significantly less abundant in PFR group. Further, significant increase in the genera that have a pathogenic interaction with the host were observed in PFR group. On the whole the mycobiome in both the groups differed significantly and formed two distinct clusters in the heatmap and Principal co-ordinate analysis. These results demonstrate significant changes in the mycobiome from the vitreous of post fever retinitis patients compared to healthy controls thus implying that dysbiotic changes in the fungal vitreous microbiome are associated with PFR.

Comparison of the Vitreous Fluid Bacterial Microbiomes between Individuals with Post Fever Retinitis and Healthy Controls.

Ocular microbiome research has gained momentum in the recent past and has provided new insights into health and disease conditions. However, studies on sight threatening intraocular inflammatory diseases have remained untouched. In the present study, we attempted to identify the bacterial microbiome associated with post fever retinitis using a metagenomic sequencing approach. For this purpose, bacterial ocular microbiomes were generated from vitreous samples collected from control individuals (VC, n = 19) and individuals with post fever retinitis (PFR, n = 9), and analysed. The results revealed 18 discriminative genera in the microbiomes of the two cohorts out of which 16 genera were enriched in VC and the remaining two in PFR group. These discriminative genera were inferred to have antimicrobial, anti-inflammatory, and probiotic function. Only two pathogenic bacteria were differentially abundant in 20% of the PFR samples. PCoA and heatmap analysis showed that the vitreous microbiomes of VC and PFR formed two distinct clusters indicating dysbiosis in the vitreous bacterial microbiomes. Functional assignments and network analysis also revealed that the vitreous bacterial microbiomes in the control group exhibited more evenness in the bacterial diversity and several bacteria had antimicrobial function compared to the PFR group.

Clinical features, optical coherence tomography findings and treatment outcomes of post-fever retinitis.

Objectives:To study the clinical features, optical coherence tomography (OCT) findings, treatment options and follow-up outcomes of post-fever retinitis (PFR).Subjects:A total of 19 eyes of 13 patients, diagnosed with PFR (retinitis following febrile episode) over 2 years were retrospectively studied.Methods:Documented history, baseline clinical features and systemic investigations performed for PFR were reviewed. Fundus findings, foveal architecture on swept-source OCT, the treatment options and the follow-up outcomes including best-corrected visual acuity (BCVA) and central foveal thickness (CFT) were reviewed and analyzed.Results:Common fundus findings included whitish retinitis lesions (100%), macular star (95%, 18eyes), retinal flame-shaped hemorrhages (63%, 12 eyes), inflammatory retinal vessels (30%, 6 eyes), vitreous hemorrhage (one eye) and OCT findings included neuro-sensory detachment (79%, 15 eyes), intraretinal white dots (89.5%,17 eyes). The baseline median log MAR BCVA and CFT were 1.30 (interquartile range (IQR):0.8–1.8) and 423 microns (IQR:182–555). Overall, nine patients (12 eyes) received a combination of oral doxycycline and oral steroids and four patients (7 eyes) received a combination of oral doxycycline, oral steroid and intravitreal anti-vascular endothelial growth factor (IVA). Significant improvement was evident at 8 weeks in median BCVA (0.50, IQR: 0.3–0.8, p < 0.05) and median CFT (223 micron, IQR: 170–256, p < 0.05) though only 26% (5 eyes) attained BCVA > = 6/12.Conclusion:Our study puts forth certain characteristic fundus and OCT features of PFR. A combination of oral doxycycline and oral steroids as a treatment option showed improvement in BCVA and CFT. Additional IVA helps in faster visual recovery in patients presenting with severe macular edema at onset.

Post-fever retinitis - Newer concepts.

Post-fever retinitis (PFR) is an infectious or para-infectious uveitic entity caused by bacterial or viral agents and seen mainly in tropical countries. Systemic symptoms such as joint pain, skin rash are common during the febrile stage. On the basis of only clinical presentation, it is difficult to pin-point the exact etiology for PFR. Serological investigations, polymerase chain reaction, and knowledge of concurrent epidemics in the community may help to identify the etiological organism. Bacterial causes of PFR such as rickettsia and typhoid are treated with systemic antibiotics, with or without systemic steroid therapy, whereas PFR of viral causes such as chikungunya, dengue, West Nile virus, and Zika virus have no specific treatment and are managed with steroids. Nevertheless, many authors have advocated mere observation and the uveitis resolved with its natural course of the disease. In this article, we have discussed the clinical features, pathogenesis, investigations, and management of PFR.

A clinical study on the efficacy of posterior subtenon injection of triamcinolone acetonide in patients with post fever retinitis

Aims: The aim of this study was to assess the visual outcome and fundoscopic changes following posterior subtenon (PST) injection of triamcinolone acetonide (TA) in patients with post fever retinitis. Settings and Design: This was a prospective interventional study. Subjects and Methods: A prospective interventional study was conducted on 12 patients with post fever retinitis responding poorly to systemic steroids or with contraindications to systemic steroids. Patients were treated with PST injection of 0.5 ml TA (20 mg). They were followed up for 6 months during which best-corrected visual acuity (BCVA), fundus changes, and intraocular pressure (IOP) were evaluated. Statistical Analysis Used: Descriptive statistics and paired t-test were used in this study. Results: All patients had BCVA