Rajeev Reddy Pappuru

Endophthalmitis after open globe injuries: changes in microbiological spectrum and isolate susceptibility patterns over 14 years

BackgroundThe objective of this study was to evaluate the microbiologic spectrum and antimicrobial susceptibility of isolates in post-traumatic endophthalmitis and compare with our earlier published report. A retrospective review was conducted on 581 consecutive patients with culture-proven post-traumatic endophthalmitis at L. V. Prasad Eye Institute, India, from January 2006 to March 2013.FindingsA total of 620 isolates from 581 patients were identified (565 bacteria and 55 fungi). The most common isolate was Bacillus spp. (106/620, 17.1%) closely followed by Streptococcus pneumoniae (105/620, 16.9%), and coagulase-negative Staphylococci (97/620, 15.6%). In our earlier report, the commonest bacteria included Streptococcus spp. (30/139, 21.6%) and gram-positive coagulase-negative micrococci (26/139, 18.7%). Gram-positive isolates were usually susceptible to vancomycin (98.2%). Gram-negative isolates were generally susceptible to gatifloxacin (92.9%), ofloxacin (89.4%), chloramphenicol (88.6%, Pseudomonas isolates were often resistant), amikacin (83.5%), and ceftazidime (77.2%). Fourteen years ago, the most sensitive antibiotic was ciprofloxacin for both gram-positive bacteria (95.12%) and gram-negative bacteria (100%).ConclusionsThe microbiological spectrum of post-traumatic endophthalmitis has remained unchanged over the last 14xa0years, and Bacillus spp. continues as the most common infecting organism. Vancomycin is the drug of choice for empiric coverage of gram-positive bacteria. Susceptibility of gram-negative bacteria to commonly used antimicrobials (amikacin and ciprofloxacin) has decreased by 10% - 15% and to ceftazidime has increased by 10.5%.

Microbiologic spectrum and susceptibility of isolates in acute postcataract surgery endophthalmitis: are they same as they were more than a decade ago?

Endophthalmitis is a severe and vision-threatening complication of intraocular surgeries like cataract surgery. Treatment of endophthalmitis includes vitreous tap/biopsy to identify the etiologic organisms and prompt initiation of broad-spectrum intravitreal antibiotics.nnThe choice of initial broad-spectrum antibiotics is based on the susceptibility patterns of micro-organisms in a particular region. The purpose of the current study was to investigate the spectrum of organisms causing culture-proven acute postcataract surgery endophthalmitis and their antimicrobial susceptibilities at our centre between 2006 and 2013, and to compare the results with the previously published data from the same centre.1 nnThis was a retrospective, non-comparative, consecutive case series. Microbiology records were reviewed of all the culture-proven, acute postcataract surgery endophthalmitis cases treated at L V Prasad Eye Institute, Hyderabad, India, between January 2006 and March 2013. Bacterial isolates were identified using Analytical Profile Index (API, Bio Meriux, France). The susceptibility was determined by the Kirby–Bauer disk diffusion method. …

Vascular Changes in Eyes Treated with Dexamethasone Intravitreal Implant for Macular Edema after Retinal Vein Occlusion

OBJECTIVEnTo evaluate the angiographic findings in eyes from 2 clinical trials of the dexamethasone intravitreal implant (DEX implant) 0.7 mg in the treatment of macular edema (ME) after branch retinal vein occlusion (BRVO) or central retinal vein occlusion (CRVO).nnnDESIGNnPost hoc analysis of pooled data from 2 identical phase 3 clinical trials.nnnPARTICIPANTSnPatients with vision loss as a result of ME (≥ 6 weeks duration) after BRVO or CRVO for whom angiographic data were available (n = 329 eyes).nnnMETHODSnFluorescein angiography (FA) results assessed by masked, certified graders using standardized grading protocols.nnnMAIN OUTCOME MEASURESnThe primary outcome measure in the parent studies was change from baseline in best-corrected visual acuity. Prospectively defined secondary outcomes included FA measurements (to assess macular capillary leakage, neovascularization, and nonperfusion) and optical coherence tomography results (to assess central retinal thickness [CRT]).nnnRESULTSnAt baseline, 42% of eyes in the DEX implant group and 38% of eyes in the sham group had unreadable assessments because of hemorrhage. At day 180, significantly fewer DEX implant-treated eyes (2%) than sham-treated eyes (9%) had unreadable assessments because of hemorrhage (P = 0.029). Among eyes with gradable assessments, the incidence of nonperfusion remained fairly steady from baseline to day 180. The proportion of eyes with active neovascularization increased from baseline to day 180 in the sham group, but stayed relatively constant in the DEX implant group (P = 0.026 for DEX vs. sham). The mean area of overall nonperfusion and the mean area of macular capillary nonperfusion increased from baseline to day 180 in both treatment groups (no statistically significant between-group difference). There was a statistically significant positive correlation between changes in macular leakage and changes in CRT in both the DEX implant group (r = 0.22; 95% confidence interval, 0.03-0.40; P = 0.023) and the sham group (r = 0.29; 95% confidence interval, 0.10-0.46; P = 0.003).nnnCONCLUSIONSnThis study demonstrated that the clinical improvements observed with the DEX implant were accompanied by significant improvements in vascular parameters and suggests that treatment with the DEX implant may be associated with some clinically significant improvements in angiographic findings, specifically active neovascularization.

Surgical management in patient with uveitis.

Surgery in the management of uveitis can be divided based on indication: either for therapeutic or can be for diagnostic purposes or to manage complications. The commonest indications include: Visual rehabilitation: surgery for removal of cataract, band keratopathy, corneal scars, pupillary membranes, removal of dense vitreous membranes, management of complications: anti-glaucoma surgery, vitreous hemorrhage, retinal detachment and chronic hypotony and diagnostic: aqueous tap, vitreous biopsy, tissue biopsy (iris, choroid). In this review, we shall describe the surgical technique for visual rehabilitation and for management of complications.

Endophthalmitis in Boston keratoprosthesis: case series and review of literature.

To report the clinical and microbiological characteristics of infectious endophthalmitis after Boston type I keratoprosthesis (B–K-Pro) implantation. Retrospective analysis of 136 eyes that received a B–K-Pro type 1 between 1999 and 2012 was performed. Five eyes with a diagnosis of exogenous endophthalmitis after B–K-pro type 1 were identified and information about demographic data, indication for K-Pro, post-operative bandage contact lens use, post-operative prophylactic antibiotic use, timing and clinical presentation of endophthalmitis, gram stain and culture results of intraocular fluid and preoperative and post-operative visual acuity were collected. The incidence of endophthalmitis was 3.67xa0% (5 of 136 eyes) and average time to develop endophthalmitis was 5.62xa0months (range 2xa0days to 8xa0months). Mean patient age was 31.4xa0years (5 to 65xa0years). The surgical indications included corneal injury due to chemical burns (nxa0=xa02), multiple failed grafts secondary to microbial keratitis (nxa0=xa02) and congenital glaucoma with congenital herpetic keratitis (nxa0=xa01). Post-Boston K-Pro, the visual acuity ranged from light perception (LP) to 20/50. K-pro was explanted in 4 patients. There was bacterial and fungal growth in two patients each and one vitreous did not grow anything. All the eyes were phthisical at last visit. Infectious endophthalmitis after K-Pro implantation in our study had a higher incidence, early onset and extremely poor visual outcome compared with post-cataract surgery endophthalmitis, as reported in literature. Not only bacterial but also fungal infections are an important etiology for infectious endophthalmitis in these cases.

Choroidal thickness profile in healthy Indian children

Purpose: The purpose was to study choroidal thickness and its profile based on location in healthy Indian children using enhanced depth spectral-domain-optical coherence tomography (SD-OCT). Methods: In this cross-sectional observational study 255 eyes of 136 children with no retinal or choroidal disease were consecutively scanned using enhanced depth SD-OCT. Eyes with any ocular disease or axial length (AXL) >25 mm or < 20 mm were excluded. A single observer measured choroidal thickness from the posterior edge of the retinal pigment epithelium to the choroid/sclera junction at 500-microns intervals up to 2500 microns temporal and nasal to the fovea. Generalized estimating equations were used to evaluate the correlation between choroidal thickness at various locations and age, AXL, gender and spherical equivalent (SEq). Results: Mean age of the subjects was 11.9 ± 3.4 years (range: 5–18 years). There were 62 Females and 74 males. The mean AXL was 23.55 ± 0.74 mm. Mean subfoveal choroidal thickness was 312.1 ± 45.40 μm. Choroid was found to be thickest subfoveally, then temporally. Age, AXL and SEq showed a significant correlation with choroidal thickness, whereas gender did not affect choroidal thickness. Conclusion: Our study provides a valid normative database of choroidal thickness in healthy Indian children. This database could be useful for further studies evaluating choroidal changes in various chorioretinal disorders. Age and AXL are critical factors, which negatively correlated with choroidal thickness.

A novel smartphone ophthalmic imaging adapter: User feasibility studies in Hyderabad, India.

Aim of Study: To evaluate the ability of ancillary health staff to use a novel smartphone imaging adapter system (EyeGo, now known as Paxos Scope) to capture images of sufficient quality to exclude emergent eye findings. Secondary aims were to assess user and patient experiences during image acquisition, interuser reproducibility, and subjective image quality. Materials and Methods: The system captures images using a macro lens and an indirect ophthalmoscopy lens coupled with an iPhone 5S. We conducted a prospective cohort study of 229 consecutive patients presenting to L. V. Prasad Eye Institute, Hyderabad, India. Primary outcome measure was mean photographic quality (FOTO-ED study 1–5 scale, 5 best). 210 patients and eight users completed surveys assessing comfort and ease of use. For 46 patients, two users imaged the same patients eyes sequentially. For 182 patients, photos taken with the EyeGo system were compared to images taken by existing clinic cameras: a BX 900 slit-lamp with a Canon EOS 40D Digital Camera and an FF 450 plus Fundus Camera with VISUPAC™ Digital Imaging System. Images were graded post hoc by a reviewer blinded to diagnosis. Results: Nine users acquired 719 useable images and 253 videos of 229 patients. Mean image quality was ≥ 4.0/5.0 (able to exclude subtle findings) for all users. 8/8 users and 189/210 patients surveyed were comfortable with the EyeGo device on a 5-point Likert scale. For 21 patients imaged with the anterior adapter by two users, a weighted κ of 0.597 (95% confidence interval: 0.389–0.806) indicated moderate reproducibility. High level of agreement between EyeGo and existing clinic cameras (92.6% anterior, 84.4% posterior) was found. Conclusion: The novel, ophthalmic imaging system is easily learned by ancillary eye care providers, well tolerated by patients, and captures high-quality images of eye findings.

Sympathetic Ophthalmia in Pediatric Age Group: Clinical Features and Challenges in Management in a Tertiary Center in Southern India

Abstract Purpose: To study the clinical features and visual outcome of sympathetic ophthalmia in pediatric patients attending a tertiary care center. Methods: Retrospective review of patients ≤16 years with sympathetic ophthalmia seen during the period 2001–2011. Results: During this period, 2511 pediatric patients with open globe injuries and 14 patients with sympathetic ophthalmia were seen. Six patients developed sympathetic ophthalmia during follow-up here. The incidence rate of sympathetic ophthalmia is 0.24% (6/2511, 95% CI:0.05–0.43%). The commonest presenting signs were anterior uveitis and exudative detachment. All patients were treated with systemic steroids, while 7 patients received additional immunosuppressive therapy. Eight patients had a follow-up of more than 6 months. Mean presenting best-corrected visual acuity (1.25u2009±u20091.03 logMAR) in the sympathizing eye improved significant following treatment (0.42u2009±u20090.80 logMAR, pu2009=u20090.003). Conclusions: The incidence of sympathetic ophthalmia was 0.24%. Appropriate immunosuppression can lead to favorable visual outcomes in the sympathizing eye.

Factors affecting DSAEK graft lenticle adhesion: An in vitro experimental study

Purpose: The aim of this study was to evaluate different factors that affect Descemet stripping automated endothelial keratoplasty (DSAEK) donor graft lenticle adhesion to the recipient cornea. Methods: This experimental study included 10 eye bank recipient corneas and 10 donor DSAEK lenticles. Recipient corneas were mounted on an artificial anterior chamber (AC), whereas donor lenticles were placed beneath the host cornea. Using optical coherence tomography and imaging software, the interface gap (IG) between the donor and recipient cornea was quantified to evaluate the effect of variations in AC air fill pressure, AC air fill duration, corneal massage, and corneal venting incisions on DSAEK donor graft lenticle adhesion. Results: Different intraocular pressures (IOP) under air for the same time intervals, do not significantly correlate with the IG; nevertheless, it was noticed that the IG decreases as the IOP increases. With respect to the magnitude of AC IOP, there was no statistically significant difference when comparing 10 mm Hg with 30 mm Hg and assessing IG (P = 0.4). Complete air–fluid exchange resulted in significantly higher IG when compared with AC air bubble of 10 and 30 mm Hg that was sustained for 1 hour (P < 0.05). Furthermore, corneal surface massage did not facilitate DSAEK graft adhesion (P = 0.59). Finally, paracentral venting incisions followed by interface fluid aspiration seemed to significantly decrease the IG (P = 0.014). Conclusions: Corneal venting incisions and higher AC IOP values seem to facilitate DSAEK donor graft lenticle adhesion to the recipient cornea.

Endophthalmitis and concurrent or delayed-onset rhegmatogenous retinal detachment managed with pars plana vitrectomy, intravitreal antibiotics, and silicone oil

BACKGROUND AND OBJECTIVEnThe current study describes the treatment outcomes in patients with endophthalmitis and concurrent or delayed-onset retinal detachment managed with pars plana vitrectomy, intravitreal antibiotics, and silicone oil.nnnPATIENTS AND METHODSnIn this noncomparative, retrospective case series, the medical records of patients diagnosed with endophthalmitis and retinal detachment from January 1991 through December 2014 at a tertiary eye care center in South India were reviewed. All patients received silicone oil for the management of retinal detachment either concurrently or during follow-up treatment.nnnRESULTSnA total of 93 patients were included in the current study. Retinal detachment was diagnosed at presentation in 20 of 93 patients (21.5%) (concurrent group: Group 1) and during follow-up in the remaining 73 of 93 patients (78.5%) (delayed-onset group: Group 2). In Group 1, the initial treatment consisted of vitrectomy, intravitreal antibiotics, and silicone oil injection in 19 of 20 patients. In Group 2, patients did not receive silicone oil during initial treatment but underwent silicone oil injection during subsequent surgery for repair of retinal detachment. Rates of complete retinal reattachment and visual acuity of 20/400 or better were 73.7% and 30.0%, respectively, in Group 1 and 98.5% and 39.7%, respectively, in Group 2. The median visual acuity at last follow-up in 44 eyes undergoing silicone oil removal was 20/100 (logMAR 0.7), whereas in the remaining 49 eyes that did not undergo silicone oil removal, median visual acuity was 20/2000 (logMAR 2.0).nnnCONCLUSIONnIn these patients with endophthalmitis with concurrent or delayed-onset retinal detachment, the use of silicone oil can be a useful adjunct. [Ophthalmic Surg Lasers Imaging Retina. 2017;48:546-551.].