Endophthalmitis caused by Klebsiella species

Klebsiella pneumoniae Endophthalmitis with Subretinal Abscess: A Case Series and Review of the Literature

This study assessed prognostic factors and the role of vitrectomy in patients with subretinal abscesses secondary to K. pneumoniae endophthalmitis. We reviewed published studies, including three cases from our cohort. Among 50 eyes, 26 had poor visual outcomes (final visual acuity <20/800, eyeball removal, or phthisis bulbi). Poor outcomes correlated with delayed ocular symptom-to-diagnosis time, initial visual acuity <20/800, severe vitritis, and macular involvement of abscesses (p < 0.001, p = 0.008, p < 0.001, and p = 0.033, respectively). Vitrectomy had a trend towards reducing eyeball removal and phthisis bulbi rates compared with non-vitrectomy (10.8% vs 30.8%, p = 0.181). However, the final visual acuity was not different and the rate of retinal detachment tended to be higher in vitrectomized eyes (45.9% vs 15.4%, p = 0.095). The study suggested that vitrectomy and drainage of K. pneumoniae subretinal abscesses could be avoided in patients with a mild degree of vitritis.

[Bacterial endogenous endophthalmitis : Spectrum of pathogens and drug therapy]

Endogenous endophthalmitis represents an ophthalmological emergency requiring immediate diagnostics and treatment. Pathogens should be detected using appropriate methods, such as the Freiburg endophthalmitis set. In bacterial endophthalmitis both Gram-positive and Gram-negative bacteria can be detected. Frequent underlying sources include endocarditis, gastrointestinal or urogenital surgery, indwelling venous catheters, liver abscesses, skin or soft tissue infections, meningitis or less commonly, intravenous drug abuse. The treatment consists of systemic and intraocular administration of antibiotics and vitrectomy. Systemic or intraocular corticosteroids can additionally be considered.

Case report: A case of acute postoperative endophthalmitis following penetrating keratoplasty due to carbapenem-resistant Klebsiella Pneumoniae and literature review

A 22-year-old lady underwent penetrating keratoplasty for serious keratoconus. The following day, it was complicated by the development of infectious endophthalmitis. The source of infection was identified as carbapenem-resistant Klebsiella pneumoniae. The donor corneal button might be playing a role in infection transmission due to carbapenem-resistant Klebsiella pneumoniae in a sputum culture when the donor was still alive. Nosocomial infections were typically severe, rapidly progressive, and difficult to treat. Finally, the patient underwent therapeutic penetrating keratoplasty again with complete resolution of the infection.

Bilateral Endogenous Klebsiella pneumoniae Endophthalmitis in Culture-Negative Liver Abscess Requiring Evisceration: A Case Report and Review of Literature

Endogenous endophthalmitis is a very rare but potentially devastating intraocular inflammation resulting from hematogenous dissemination into the eye from a remote focus of infection. We present a case of a 49-year-old Vietnamese gentleman with underlying hypertension and ischemic heart disease who presented with sudden onset bilateral eye blurring of vision for five days associated with fever, chills, and rigors. He started to have a chesty cough with right-sided pleuritic chest pain for three days as well as shortness of breath, which developed one day prior to admission. Bilateral ocular examinations and B-scan ultrasonography were consistent with endophthalmitis. A systemic workup was performed and showed multiloculated liver abscess and right lung empyema seen radiologically. Bilateral eye vitreous tap and intravitreal antibiotic injection were performed. He underwent ultrasound-guided pigtail catheter insertion and drainage of the subcapsular and pelvic collection. Microbiological findings revealed Klebsiella pneumoniae infection obtained from vitreous and endotracheal aspirate samples. There were no cultures yielded from the intraabdominal collection and peripheral blood. The right eye infection rapidly progressed to panophthalmitis, which subsequently led to globe perforation despite prompt treatment and eventually required evisceration. Thus, despite culture-negative pyogenic liver abscess in a non-diabetic patient, a high index of suspicion, emergent radiographic evaluation, and prompt intervention and treatment are crucial in salvaging the globes.

Metastatic Klebsiella Pneumoniae in an Immunocompetent Patient: A Rare, Atypical Presentation of Klebsiella Syndrome

Metastatic Klebsiella pneumoniae (MKP) is a rare, atypical presentation of Klebsiella syndrome. The disease primarily affects patients with underlying immunocompromised status, but its prevalence in immunocompetent patients without any underlying illness is rare. We present a rare case of MKP in a 41-year-old Caucasian male without prior comorbidities who presented with blurry vision and was found to have MKP. The current case report also discusses the diagnostic modalities, complications, and treatment options of MKP.

Hypervirulent Klebsiella Pneumoniae, an Emerging Cause of Endogenous Endophthalmitis in A French Center: A Comparative Cohort Study

INTRODUCTION

Klebsiella pneumoniae (KP) is the most common cause of endogenous endophthalmitis (EE) in Asia, but data in Europe are scarce. We describe eight cases of KP EE compared to a cohort of EE in a French center.

METHODS

EE cases were retrospectively studied between January 2014 and January 2021. KP EE cases were analyzed to assess clinical, microbiological features, and outcome.

RESULTS

Among the 33 EE cases identified, the first causative agent (24%, n = 8) was KP, mainly (7/8) with hypervirulent phenotype (hvKP). All but one of these cases occurred from December 2019 to January 2021. Contrary to non-KP patients, KP patients had multiple extraocular infective foci (p = .006), all presented with liver abscesses (p < .001), 50% had cerebral involvement (p = .13). Visual outcome was poor in both groups.

CONCLUSION

KP is an emerging cause of EE in a French center, consistently associated with liver abscesses, frequent cerebral involvement, and predominance of hvKP strains.

The invasive Klebsiella pneumoniae syndrome: Case series

This case-series aims to report three cases of endogenous endophthalmitis due to invasive Klebsiella pneumoniae syndrome.

Case 1

A 34-year-old lady who was admitted for pneumonia developed painful blurring of vision and redness in the right eye (RE) for one week. An examination of the RE revealed visual acuity (VA) of light perception (PL) with positive relative afferent pupillary defect (RAPD), proptosis, and restriction of extraocular movement with hypopyon. The patient was treated for RE panophthalmitis with a lung abscess and was started on systemic and topical antibiotics. The vitreous tap culture grew Klebsiella pneumoniae. Despite treatment, the patient's condition deteriorated, and evisceration was undertaken.

Case 2

A 38-year-old lady presented with a acute onset of RE pain associated with blurred vision and redness for two days, and fever for one week. RE VA was hand movement with a positive RAPD and anterior chamber cells of 2+. A B-scan revealed a dome-shaped subretinal mass with exudative retinal detachment. The patient was treated for RE panophthalmitis complicated by a basal ganglia abscess. The urine and vitreous tap cultures grew Klebsiella pneumoniae. She responded to high-dose intravenous and intravitreal antibiotics. Unfortunately, her RE became phthisical.

Case 3

A 70-year-old lady presented with painless blurring of vision over the RE. The blood and urine cultures grew Klebsiella pneumoniae. RE VA was PL, and she was treated for endogenous endophthalmitis. The vitreous culture grew Klebsiella pneumoniae. Unfortunately, the RE became phthisical.

Endogenous Endophthalmitis-The Clinical Significance of the Primary Source of Infection

Endophthalmitis is a severe form of ocular inflammation. The source of pathogens in endogenous endophthalmitis is located inside the body, and infection spreads hematogenously. Although rare, endogenous endophthalmitis is a very serious condition, as this type of inflammation is very devastating for ocular tissues. Prognosis is very poor, and the patients are often in a serious general condition, so they require special care and an individual approach in the treatment process. Thanks to the knowledge of the risks associated with infections of individual tissues and organs as well as potential pathogens and the clinical picture, it is possible to make a correct diagnosis faster and implement the correct treatment. In the case of endogenous endophthalmitis, reaction time is absolutely crucial for prognosis. In this review, we focus primarily on the importance of the primary source of infection for the course of the disease and prognosis.

A rare presentation of Klebsiella pneumoniae endogenous panophthalmitis with optic neuritis and orbital cellulitis from a urinary tract infection

This case illustrates the rare presentation of endogenous Klebsiella pneumoniae endophthalmitis with concomitant orbital cellulitis from an acute pyelonephritis. A 59-year-old Caucasian female with type 2 diabetes mellitus was transferred from a regional hospital with decreased visual acuity, periorbital edema, photophobia, proptosis and pain of the right eye, as well as suprapubic discomfort. Initial ocular examination and B-scan ultrasonography were consistent with endophthalmitis and orbital cellulitis which lead to a vitreous tap and intravitreal antibiotics injection and systemic antibiotherapy. Vitreous and blood cultures confirmed Klebsiella pneumoniae as the causative organism. An orbital MRI showed a panophthalmitis with optic neuritis and further imaging confirmed a concomitant pyelonephritis secondary to a septic nephrolithiasis. The patient was given treatment with high-does intravenous antibiotics, oral and topical corticotherapy, and an early core pars plana vitrectomy (PPV), performed 5 days after presentation with repeat injections of antibiotics and dexamethasone. Unfortunately, two weeks following PPV, despite an initial stable postoperative course, the patient deteriorated and presented with purulent discharge from one of the vitrectomy port incision site. An emergency evisceration was performed in order to control the infection, revealing a large subretinal abscess and necrosed sclerotic tissue around the prior vitrectomy incision sites. Conclusion: This is the first case report of Klebsiella pneumoniae endophthalmitis or panophthalmitis presenting with orbital cellulitis and optic neuritis from an urinary tract infection. Prognosis is poor despite treatment including early vitrectomy.

Clinical Features and Mortality of Endogenous Panophthalmitis in China: A Six-Year Study

PURPOSE

To report the clinical features, treatment strategy, and mortality of patients with endogenous panophthalmitis (EP).

METHODS

Fifteen patients (16 eyes) diagnosed with EP from December 2012 to December 2018 were investigated with a standard protocol at a tertiary medical center of the largest eye center in Northern China. Mortality was followed up.

RESULTS

All participants were Han Chinese. The mean age was 58.3, 62.5% were male, and 93.3% were unilaterally involved. The average number of predisposing factors was 3.0. The top two predisposing factors were diabetes mellitus (DM, 93.3%) and pyogenic liver abscess (PLA, 66.7%). All patients initially presented at an ophthalmic emergency due to severe ocular symptoms. All patients were co-managed by relevant specialists and were admitted to medical or surgical wards instead of the eye center unless the systemic condition was well controlled. Only four eyes were eligible for vitrectomy. The mean follow-up duration was 12.5 months. The mortality rate was 0%. The predominant causative organism was Klebsiella pneumoniae (80.0%), and there were no positive fungal cases.

CONCLUSIONS

EP is a rare, life-threatening disease. DM and PLA could predispose its development. The predominant causative organism was Klebsiella pneumoniae. The interdisciplinary cooperation system of the management of EP may reduce the mortality rate.Abbreviations :EP: endogenous panophthalmitis; EE: endogenous endophthalmitis; DM: diabetes mellitus; PLA: pyogenic liver abscess; ACI: acute cerebral infarction; UTI: urinary tract infection; ICU: intensive care unit; VA: visual acuity; LP: light perception; HM: hand motion; NLP: no light perception; K. pneumoniae: Klebsiella pneumoniae; CT: computed tomography; MRI: magnetic resonance imaging; CRP: C-reactive protein; PCT: procalcitonin; FBG: fasting blood glucose; WBC: white blood cell; NEUT: neutrophil proportion; BDG: 1,3-β-D-glucan; GM: galactomannan; IVI: intravitreal injection; PPV: pars plana vitrectomy; ILAS: invasive liver abscess syndrome; cps: capsular polysaccharide; CSF: cerebrospinal fluid; SD: standard deviation.

Hypervirulent Klebsiella pneumoniae Endogenous Endophthalmitis-A Global Emerging Disease

The review aims to document the new emerging hypervirulent Klebsiella pneumoniae (Kp) endogenous endophthalmitis (EKE) in terms of incidence, microbiological characterization of the pathogenic agent, associated risk factors, management, and outcomes. Hypervirulent (hv) strains of KP (hvKp) induce invasive liver abscesses (LA) with specific clinical features. Up to 80–90% of cases have hepatic liver abscess as a primary focus of infection, followed by renal or lung hvKp infections. However, the incidence of EKE in patients with KPLA varied between 3.4% (19) and 12.6% (13), with a total of 95 cases of endophthalmitis in 1455 cases of KPLA (6.5%). Severe visual loss was encountered in 75% of cases, with 25% bilateral involvement. Intravitreal antibiotics are the mainstay therapeutic approach. Pars plana vitrectomy is a subject of controversy. HvKp strains present mostly natural “wild-type” antibiotic resistance profile suggestive for community-acquired infections, being highly susceptive to the third and fourth generation of cephalosporins and carbapenems. Antimicrobial resistance in hypervirulent strains was recently documented via plasmid transfer and may result in extremely difficult to treat cases. Global dissemination of these strains is a major epidemiologic shift that should be considered in the diagnostic and therapeutic management of patients with endogenous endophthalmitis. Ophthalmologic screening in patients with KPLA and other hvKp infections and a multidisciplinary therapeutic approach is extremely important for early diagnosis and preservation of the visual function.

Pet-turtles: a potential source of human pathogenic bacteria

Human infections caused by the bacterial pathogens transmitted from pet-turtles are becoming very common and getting more importance as the turtles are considered unsafe pet animals, mainly for children and immunocompromised people. Pet-turtles are known as the reservoir of different bacterial species as their intestinal microflora. Extrinsic stressors, such as crowding, unhygienic handling, poor water quality, polluted feeding and inadequate nutrition, can predispose pet-turtles to bacterial infections. The presence of different virulence genes leads to the virulent potential of bacteria. The virulent bacteria can cause infections in turtles and humans, if the turtle owners or shopkeepers don't practice proper sanitation while handling turtles. The aim of this review paper was to provide an overview of different bacterial species isolated from pet-turtles for awareness-raising about potential health risks related to raise pet-turtles.

ENDOGENOUS ENDOPHTHALMITIS IN WESTERN AUSTRALIA: A Sixteen-Year Retrospective Study

PURPOSE

To review the clinical features, microbiology spectrum, management, and outcomes of patients with endogenous endophthalmitis in Western Australia over a 16-year period.

METHODS

This is a retrospective chart review of all patients with endogenous endophthalmitis who presented to all tertiary ophthalmology departments between 2000 and 2015 in Western Australia.

RESULTS

Sixty-six eyes of 57 patients with endogenous endophthalmitis were identified, and follow-up data were available for a mean of 554 days. The average frequency was 1.6 per 1,000,000 population per year. Diabetes mellitus (33%) and intravenous drug use (30%) were the most common risk factors. Concurrent systemic infections included urinary tract infection (28%), pneumonia (23%), and endocarditis (21%). Among culture-positive cases (93%), 57% were bacterial and 43% were fungal. Visual acuity improved in 33 (50%) and declined in 15 eyes (22.7%). Baseline visual acuity and the presence of Gram-negative or filamentous fungi were the only predictors of final visual acuity (P = 0.023 and P = 0.001).

CONCLUSION

The population frequency of endogenous endophthalmitis has not changed over 16 years despite the changing profile of pathogen and risk factors. Similar to previous studies in Asian and Western countries, visual and anatomical prognosis depends on initial visual acuity and isolated pathogen. Gram-negative and filamentous fungi culture predicted a worse visual outcome.

Endogenous Endophthalmitis: A Review of Case Series Published between 2011 and 2020

This is a literature review of 31 case series of endogenous endophthalmitis (EE) published in the last ten years, identified from a literature search of several databases (PubMed, EMBASE, and the Cochrane Library). While diabetes mellitus and malignancies remain the most frequently associated medical conditions, intravenous drug use is a significant risk factor (especially in the last years, in studies from Western countries). Ophthalmologic screening is recommended for candidaemia, but not in patients with sepsis of other aetiologies (however, the physician treating patients with sepsis must be well aware of EE). The most frequent Gram-positive microorganisms that cause EE are Staphylococcus and Streptococcus; the most frequent Gram-negative organism is Pseudomonas, and yeasts, probably Candida, usually cause fungal infections. In all-cause EE, prognostic factors of better visual outcomes are initial VA better than counting fingers, performing a pars plana vitrectomy (PPV), performing an intravitreal injection within the first 24 hours after clinical diagnosis, and the presence of a focal type of EE. In endogenous fungal endophthalmitis, more than 1/4 of patients have bilateral involvement. Blood samples have a low rate of positivity. Yeasts remain the most prevalent cause. Many authors report using azoles and echinocandins for systemic therapy (and voriconazole for intravitreal injections). Although PPV was performed in small proportions of eyes, the anatomical success rate is quite high. Klebsiella pneumoniae is an important cause of EE in Southeast Asia (and probably an emergent etiology in other regions), which is frequently associated with diabetes. There is a robust association with pyogenic liver abscess (PLA) (but in up to half of the cases, the diagnosis of EE precedes that of PLA). Blood cultures have a high diagnostic yield, while vitreous samples have a low yield. K. pneumoniae may carry antibiotic resistance. Anatomical and functional success rates are small, but they may be improved with PPV.

Klebsiella Cluster Endophthalmitis following Intravitreal Bevacizumab: Role of Early Detection, Pars Plana Vitrectomy, and Intracameral Moxifloxacin

AIM

To report the clinical profile, outcomes of early vitrectomy for cluster endophthalmitis developing after intravitreal Bevacizumab (IVB), and discuss the role of prophylactic intracameral moxifloxacin for eyes undergoing combined cataract surgery with IVB.

METHODS

Single center, retrospective analysis of 35 consecutive eyes developing post-IVB inflammation.

RESULTS

Of the 35 eyes that were administered IVB (27 eyes 'IVB alone' and 8 eyes 'IVB with cataract surgery'). Endophthalmitis developed in 28 eyes, 6 eyes were managed with Intravitreal antibiotic (IVAB) alone, while 22 eyes required early vitrectomy. Only one eye undergoing a combined phacoemulsification with IVB developed endophthalmitis. Majority(26/28) of the eyes achieved visual acuity equal to/greater than pre-IVB injection vision over a period of 3.15 ± 3.2 months.

CONCLUSION

Early detection and prompt PPV were effectual for achieving good functional outcomes in our cluster of post-IVB Klebsiella endophthalmitis. Intracameral moxifloxacin was protective in cases undergoing combined cataract surgery with IVB.

Invasive liver abscess syndrome caused by Klebsiella pneumoniae: first Tanzanian experience

Over the past 20 years there has been growing awareness of community-acquired primary liver abscess caused by strains of Klebsiella pneumoniae (K. pneumoniae) especially in patients of Asian descent, a minority of which are characterized by metastatic spread. A common and frequent destructive complication is endophthalmitis as well as the involvement of the central nervous system (CNS), causing suppurative meningitis or brain abscess. Here we report a case of invasive liver abscess caused by K. pneumoniae in an Asian patient who presented to our hospital in Tanzania with bilateral lower limb swelling for 6 weeks with acute onset of difficulty in breathing.

Metastatic endophthalmitis - Has the trend of causative organism changed in the modern antibiotic era - A Systematic Review

Endogenous endophthalmitis, EE, a less common form of endophthalmitis, occurs when the microorganisms spread to the eye through the bloodstream, from a septic focus elsewhere in the body, that breaches into the integrity of the eyeball itself. The etiopathogenesis of endogenous endophthalmitis has changed over the past two decades, the aim of this review being to study the changing trends in causative organism in the era of modern antibiotics.

The cereus matter of Bacillus endophthalmitis

Bacillus cereus (B. cereus) endophthalmitis is a devastating intraocular infection primarily associated with post-traumatic injuries. The majority of these infections result in substantial vision loss, if not loss of the eye itself, within 12-48 h. Multifactorial mechanisms that lead to the innate intraocular inflammatory response during this disease include the combination of robust bacterial replication, migration of the organism throughout the eye, and toxin production by the organism. Therefore, the window of therapeutic intervention in B. cereus endophthalmitis is quite narrow compared to that of other pathogens which cause this disease. Understanding the interaction of bacterial and host factors is critical in understanding the disease and formulating more rational therapeutics for salvaging vision. In this review, we will discuss clinical and research findings related to B. cereus endophthalmitis in terms of the organism's virulence and inflammogenic potential, and strategies for improving of current therapeutic regimens for this blinding disease.

Endogenous Endophthalmitis Caused by Klebsiella pneumoniae: A Ten-Year Retrospective Study in Western China

OBJECTIVES

The aim of this study was to analyse the clinical features, microbiology results, management and outcomes of patients with endogenous endophthalmitis caused by Klebsiella pneumoniae in western China.

METHODS

A retrospective review of medical records of 10 eyes in 10 subjects diagnosed with endogenous K. pneumoniae endophthalmitis from January 2008 to December 2018 was undertaken.

RESULTS

The top 3 predisposing medical conditions included diabetes mellitus (50%), malignancy (20%) and cardiac stent implantation (10%). Extraocular infective foci were mainly found in the liver (40%), lungs (20%) and kidneys (10%). The positive culture rate was 85.71% (6/7) in vitreous samples, 83.33% (5/6) in blood samples and 100% (4/4) in body fluid samples. Only 20% of the patients, who had good initial visual acuity (VA) better than hand movement (HM), achieved a final VA better than 1.0 (log MAR). The mortality rate was 10%.

CONCLUSIONS

Though the prognosis of endogenous K. pneumoniae endophthalmitis is often poor, patients with an initial VA better than HM may have a good prognosis under comprehensive treatments, including vitrectomy, systemic sensitive antibiotic injection and drainage of the primary infection loci.

Phylogenetic relationships, virulence and antimicrobial resistance properties of Klebsiella sp. isolated from pet turtles in Korea

Klebsiella sp. are responsible for a multitude of infectious diseases in both humans and animals. In this study, phylogenetic relationships, virulence and antimicrobial resistance gene properties of 16 Klebsiella sp. isolated from 49 pet turtles were investigated. The isolates including Klebsiella oxytoca (n = 13) and Klebsiella pneumoniae (n = 3) were identified using 16S rRNA gene sequencing and each species formed distinct clusters in the neighbour-joining phylogenetic tree. The prevalence of virulence genes including ureC (100%) and kfu (68·75%) was observed among the isolates using Polymerase chain reaction (PCR) assay. The fimH, mrkD and rmpA genes were detected in all K. pneumoniae while these were absent in every K. oxytoca isolate. In antimicrobial susceptibility testing, high resistance rates were observed against ampicillin (100%) and cephalothin (62·50%). The resistance rates against imipenem, tetracycline, trimethoprim/sulfamethoxazole, nalidixic acid and ciprofloxacin were 12·50, 12·50, 12·50, 6·25 and 6·25% respectively. The presence of antimicrobial resistance genes such as plasmid-mediated quinolone resistance (PMQR) [qnrB (37·50%), qnrA (31·25%), qnrS (12·50%) and aac(6')-Ib-cr (12·50%)], extended-spectrum β-lactamase (ESBL) [bla_CTX-M (18·75%)], β-lactamase [bla_SHV-1 (18·75%)] and tetracycline resistance [tetE (12·50%)] was observed. The results revealed that pet turtle-borne Klebsiella sp. may carry different types of virulence and antimicrobial resistance genes which represents a potential threat to public health. SIGNIFICANCE AND IMPACT OF THE STUDY: Klebsiella sp. are nonmotile Gram-negative bacteria that are found in different environments. The virulence and antimicrobial resistance properties of pet turtle-borne Klebsiella sp. have not been studied before. Phylogenetic relationships, virulence traits and antimicrobial resistance profiles of pet turtle-borne Klebsiella sp. were characterized for the first time in Korea. Multiple virulence and antimicrobial resistance genes were observed among the isolates. The occurrence of virulence and antimicrobial resistance determinants in Klebsiella sp. may represent a potential threat to public health.

Klebsiella pneumoniae endogenous endophthalmitis presenting as orbital cellulitis

This report describes the first documented case of Klebsiella pneumoniae endogenous endophthalmitis with concurrent orbital cellulitis in a patient without a liver abscess. A 34-year-old, caucasian male with a history of intravenous drug abuse and type 1 diabetes mellitus was transferred from an outside hospital for progressively worsening pain and swelling in the right eye. Careful history, physical examination, and imaging were consistent with a diagnosis of endogenous endophthalmitis with concurrent orbital cellulitis. Vitreous cultures were positive for Klebsiella pneumoniae. Despite aggressive and early intervention with antibiotics and vitrectomy, the patient's condition continued to worsen and evisceration was required to adequately control the infection. Klebsiella pneumoniae endogenous endophthalmitis with concurrent orbital cellulitis is a rare and often blinding infection, despite appropriately aggressive intervention.

Management of multi drug resistant endogenous Klebsiella pneumoniae endophthalmitis with intravitreal and systemic colistin

We report a case of a 35-year-old male with a pancreatic pseudocyst, who developed bilateral endogenous endophthalmitis, 4 days after surgical drainage of the pseudocyst. Bacterial cultures of the pancreatic drain fluid and the vitreous tap showed the growth of Klebsiella pneumoniae. The cultured organism was resistant to all the tested antibiotics except colistin. Intravenous colistin was instituted and three injections of intravitreal colistin were given in the left eye of the patient. Complete resolution of infection was seen and visual acuity of 6/6 was regained in both eyes, which was maintained at 4-month follow-up.

Isolates and antibiotic susceptibilities of endogenous bacterial endophthalmitis: A retrospective multicenter study in Japan

Endogenous bacterial endophthalmitis, also called metastatic endophthalmitis, is a rare bacterial endophthalmitis derived from distant infectious foci via the bloodstream. This infection can potentially cause not only severe visual disturbance, but also loss of the eyeball or death, as most patients are immunocompromised. This retrospective Japanese multicenter study analyzed 32 eyes in 25 definitive cases. Twelve patients (48.0%) had diabetes mellitus. Typical ocular findings were vitreous haze (87.5%), cells in the anterior chambers (62.5%) and retinal infiltrates (50.0%). Elevated body temperature (64.0%), high serum C-reactive protein (96.0%) and leukocytosis (52.0%) were also frequently observed. Culture positivity rates for intraocular fluid were higher in the vitreous (62.5%) versus aqueous humor (28.6%). High positivity rates were also observed for blood (57.1%) and central venous catheters (100%). The most common pathogen was Staphylococcus aureus (10 cases), including methicillin-resistant S. aureus (4 cases). The next most common pathogen was Klebsiella pneumoniae (7 cases), which was highly associated with liver abscess. Compared to a previous 1991 national multicenter study, there has been a fourfold increase in the ratio of S. aureus. Antibiotic susceptibility tests revealed that all Gram-positives were susceptible to vancomycin and all Gram-negatives were susceptible to third-generation cephalosporins, imipenem/cilastatin, gentamycin and levofloxacin. Prognostic factors influencing poor visual outcome included poor initial visual acuity (p < 0.01), K. pneumoniae (p = 0.027) and gram-negative bacteria (p = 0.014) as the causative bacteria. Intravitreal antibiotic injection in combination with vancomycin and ceftazidime may be applicable for use as part of the standard treatment regimen for EBE.

Analysis of Klebsiella as a Prognostic Factor of Ocular Outcomes in Endogenous Endophthalmitis with Decision Tree Analysis

BACKGROUND

Endogenous endophthalmitis (EE) is a fulminant ocular disease. This study was conducted to explore frequent pathogens and significant prognostic factors associated with poor ocular outcomes.

MATERIALS AND METHODS

A retrospective analysis was performed in a tertiary hospital in Korea. Thirty-nine patients, treated between January 2000 and June 2017, were eligible for the analysis. Ocular outcomes were classified as follows: 1) no light perception (NLP), 2) light perception (LP), 3) hand motion (HM), 4) counting fingers (CF), and 5) 20/200 or better. Logistic regression and decision tree analyses were used to identify risk factors that were associated with poor outcomes.

RESULTS

Pathogens were identified in 23 (58.9%) samples from blood, liver aspirate, and/or vitreous humor. Klebsiella pneumoniae was the most frequent organism (12/39, 30.8%), followed by Candida species (3/39, 8.3%). The most common combined infection was liver abscess (16/39, 41.0%). Acute pyelonephritis occurred in 30.8% of cases (12/39). Final ocular outcomes were as follows: 35.9% (14/39) NLP, 15.4% (6/39) LP, 15.4% (6/39) HM, 7.7% (3/39) CF, and 25.6% (10/39) 20/200 or better. K. pneumoniae was a poor prognostic factor in univariate (odds ratio [OR], 13.3; 95% confidence interval [CI], 2.1-130.9) and multivariate (OR, 17.5; 95% CI, 2.1-398.8) regression analyses (NLP and LP vs. HM, CF, and 20/200 or better). Other factors did not reach statistical difference. Decision tree analysis identified K. pneumoniae as a node that divided ocular outcomes (P = 0.017).

CONCLUSIONS

In conclusion, K. pneumoniae is the most frequent causative pathogen of EE. Considering the poor prognosis and rapid progression of K. pneumoniae EE, physicians should test for K. pneumoniae EE in patients who experience acute systemic infections with ocular signs and symptoms.

Medical management of a subretinal Klebsiella pneumoniae abscess with excellent visual outcome without performing vitrectomy

OBJECTIVE

To report the case of a Klebsiella pneumoniae endogenous endophthalmitis (KPEE) of hepatic and urinary origin that was successfully treated with systemic antibiotherapy and 13 intravitreal antibiotics injections without performing a vitrectomy.

PATIENT AND METHOD

Case report of a 60-year-old man with a subretinal abscess in the left eye that developed 3 days after initial presentation for K. pneumoniae bacteremia, liver abscess and urinary tract infection.

RESULTS

Ophthalmic examination of the left eye showed anterior uveitis and a single subretinal abscess located in mid-peripheral temporal retina. BCVA dropped to 20/50. Follow-up was made with clinical examination and multimodal imaging (SD-OCT, FA, ICGA) with high field photographs. A total of 13 intravitreal injections (IVI) of ceftazidime were performed, and no vitrectomy was required. Ocular signs regressed and prognosis was excellent with 20/20 of final BCVA.

CONCLUSION

KPEE is a rare but severe condition with a typically poor ocular prognosis. When diagnosis is made early, subretinal abscess with partially conserved BCVA could be treated successfully with medical management that includes systemic antibiotics and repeated intravitreal injections without requiring vitrectomy.

Rising trends of endogenous Klebsiella pneumoniae endophthalmitis in Australia

BACKGROUND

Endogenous Klebsiella pneumoniae endophthalmitis (EKPE) is a well-known entity in South-East Asia. We demonstrate a range of differing clinical features and outcomes of EKPE, and highlight the increasing incidence of EKPE in major centres in Sydney and Melbourne, Australia.

DESIGN

Retrospective observational case study and case series in the hospital setting.

PARTICIPANTS

Four cases of EKPE.

METHODS

EKPE cases from 2005 to 2015 were identified through established endophthalmitis databases as well as hospital-based microbiological searches.

MAIN OUTCOME MEASURES

EKPE cases were confirmed with positive K. pneumoniae intraocular samples.

RESULTS

Rising trends of EKPE were noted in major centres in Australia. Six eyes of four patients with EKPE from January 2011 to December 2015 are reported. The mean age was 49 years (range 43-58 years). Two patients had bilateral involvement. There were systemic symptoms up to 10 days prior to ocular symptoms. The source of sepsis in all cases was a hepatic abscess. Two patients had diabetes mellitus. Five eyes had hypopyon panuveitis on presentation. All eyes underwent vitrectomy. The patient with the most delayed presentation underwent enucleation following globe perforation. Final best corrected visual acuity (BCVA) in one patient with bilateral EKPE was light perception (LP) only. The other three eyes had BCVA in at least one eye of 6/24 or better.

CONCLUSIONS

EKPE is an emerging condition in Australia. Although rare, EKPE is a sight-threatening and potentially life-threatening emergency that can initially present to ophthalmologists. One should suspect EKPE in septic patients with a B-scan showing a vitreous or retinal abscess.

Endogenous Endophthalmitis in the American and Korean Population: An 8-year Retrospective Study

PURPOSE

To study the clinical features of endogenous endophthalmitis (EE) in sample patient populations from the USA and South Korea over an 8-year period.

METHODS

We reviewed data from 128 eyes of 60 American and 48 Korean patients diagnosed with EE and compared their clinical characteristics.

RESULTS

Fungemia and liver abscess were the most common extraocular infection sources among American (26.7%) and Korean patients (33.3%), respectively. Klebsiella pneumoniae and Candida species were the most common pathogens of EE in the Korean and the American patients, respectively. Endophthalmitis caused by fungi had a better visual prognosis than that caused by bacteria (p = 0.001). Vitrectomy was beneficial for eyes with EE due to virulent bacteria presenting with worse than counting finger vision.

CONCLUSIONS

The predisposing conditions and responsible organisms for EE vary in different regions of the world. The visual prognosis was strongly influenced by the underlying pathogen.

Update on the prevention and treatment of endophthalmitis

Endophthalmitis remains a rare but serious cause of visual loss. Over time, changes have been noted in endophthalmitis in terms of predominant causes, infecting organisms, and antibiotic susceptibilities. There is controversy regarding the use of intracameral prophylactic antimicrobials during cataract surgery. Alternatively, there appears to be increasing evidence against using routine topical antibiotics for intravitreal injections. There are also increasing reports of multidrug-resistant organisms causing endophthalmitis, but the combination of vancomycin and ceftazidime appears effective for the vast majority of cases. Future trends may involve increasing utilization of polymerase chain reaction for diagnosis, and possibly office-based pars plana vitrectomy for treatment of endophthalmitis.