Fungal Blood Cultures Research Articles

A Rare Skin Disorder with Bacteremia in a Neonate.

A Rare Skin Disorder with Bacteremia in a Neonate.

VP Shunt With Recurrent Malfunction in Two Pediatric Patients: Is the Hydrocephalus Truly Idiopathic?

VP Shunt With Recurrent Malfunction in Two Pediatric Patients: Is the Hydrocephalus Truly Idiopathic?

Incidence and Predictors of Adverse Respiratory Events during Induction Therapy in Children with Acute Myeloid Leukemia

Background: Mortality in pediatric acute myeloid leukemia (AML) has plateaued between 30-40%, with 5-15% of these deaths occurring during initial induction. While pulmonary complications contribute to the early morbidity and mortality in pediatric AML, our knowledge of the incidence, risk factors, and patterns of respiratory adverse events (AEs) is lacking. Hypothesized risk factors for respiratory AEs during induction include hyperleukocytosis, fluid overload, coagulopathy, and infection. Our objective was to characterize the incidence, categories, and risk factors of respiratory AEs in de novo pediatric AML patients during induction chemotherapy.Methods: We conducted a single institution retrospective longitudinal study from presentation to Day 42 or initiation of the next chemotherapy cycle in de novo pediatric AML patients (age 0-21 years) presenting between January 1, 2001 and December 31, 2016. Patients were identified through the institutional cancer registry. Exclusion criteria included: relapsed AML, induction at another institution, and failure to treat with conventional protocols. Outcomes of interest included development of an NCI CTCAE (v4.0) grade 2-5 respiratory AE or death from another cause. Data was abstracted in regards to demographic and disease characteristics at presentation. Supportive care measures included fluid status, with fluid overload defined as a ≥ 10% increase from body weight at presentation or the use of ≥ 3 doses of furosemide during the follow up period. Respiratory AE was attributed to infection in cases with a positive bacterial or fungal blood culture, respiratory viral panel, endotracheal tube aspirate, or a chest imaging report explicitly suggesting a pulmonary infectious process. A single rater assigned the most specific, best fitting CTCAE category and grade for each incident event at its maximal severity. Time to event distribution curves were created and descriptive statistics using two-sample T-test, Chi square test for independence, or Fisher's exact test as appropriate were calculated (SAS v X, Cary, NC).Results: To date we have reviewed the induction course on 63 of 245 eligible patients with de novo AML. Median age at diagnosis was 8.0 years (range, 0-21 years), 58.7% were female (n = 37), and 42.9% non-Hispanic White (n = 28). During the follow up period, 3 patients died (4.8% induction death at days 5, 25, 73). The deaths at days 25 and 73 were due to pulmonary fungal infection and the death at day 5 from an intracranial bleed. During the first 42 days, 52.4% (n = 33) patients experienced 34 discrete respiratory AEs: CTCAE grade 2 in 2.9% (n = 1), grade 3 in 64.7% (n = 22), grade 4 in 26.5% (n = 9) and grade 5 in 5.9% (n = 2). Among the respiratory AEs, 44.1% required BiPAP/CPAP (n = 4) or mechanical ventilation (n = 11). As shown in Table 1, those with and without respiratory AEs differed significantly in regards to median age at diagnosis (p = .003), coagulopathy at diagnosis (PT (p = .019), D-dimer (p = .012)), and fluid overload status (p < .0001). Those with respiratory AEs did not differ by sex (p = .08), development of infection (p = .65), or WBC at diagnosis (p = .08). A bimodal distribution of time to event was (Figure 1) with 67.7% (n = 23) of AEs occurring between presentation and day 7 and classified as “early.” As seen in Table 2, there were statistically significant differences between the early and late AE groups for WBC at diagnosis (p = .007), PT at diagnosis (p = .012), and fluid overload (p = .026). While a larger proportion of the late AEs experienced infection (45.5% vs 30.4%), this did not significantly differ from the early AEs (p = .39).Conclusion: We note a high incidence of grade 2-5 respiratory AEs in pediatric patients during AML initial induction [52.4%]. Fluid overload appears to be a significant factor in early AEs. Documented infection occurred in a higher proportion of late AE cases, although this did not reach statistical significance. Future analyses will examine the role of cytogenetic factors and morphology. Pulmonology and oncology raters will independently characterize and validate the category of each respiratory AE (e.g. atelectasis, pulmonary edema, pulmonary leukostasis, pneumonia) through a standardized process for the full eligible cohort. Identifying modifiable risk factors will enable design of supportive care interventions to decrease the risk of respiratory AEs and their associated morbidities during induction. [Display omitted] DisclosuresNo relevant conflicts of interest to declare.

Incidence of chorioretinitis and endophthalmitis in hospitalized patients with fungemia.

Bloodstream candida infections can seed the eye via hematogenous spread and result in chorioretinitis or endophthalmitis. If undetected and untreated, this can result in permanent vision loss. Past studies evaluating incidence of ocular candidiasis among hospitalized patients with positive fungal blood cultures have demonstrated variable rates of occurrence, but recent studies have generally shown a lower incidence than was reported several decades ago. Given low rates of occurrence, the utility of screening patients with dilated fundus exams has been called into question. The primary aim of this investigation is to identify the rate of chorioretinitis and endophthalmitis based on dilated fundoscopy for patients with fungemia at a tertiary care hospital. This study was a retrospective chart review of adult patients admitted to the medical centre of the University of Arkansas for Medical Sciences (UAMS) between May 1, 2014 and December 31, 2017, who had positive fungal blood cultures during their hospitalization. There were 324 positive fungal cultures in 290 patients. Of this initial group, there were 161 eye exams. Ocular examination identified 7 of 161 patients (4.3%) with chorioretinitis or endophthalmitis. These outcomes along with previous studies support the current guidelines that screening with dilated fundus examination for these patients is appropriate and necessary.

653. Comparison of Yeasts identification by Biofire, Culture and ePlex for Quality Assurance purpose

BackgroundAt the University of Kentucky Medical center (UKMC), positive fungal blood cultures are concurrently run through the Biofire Blood Culture Identification (BCID) panel which detects 5 Candida species. The newer platform, the GenMarkDx ePlex BCID-FP (fungal panel) is designed to detect 16 fungal targets. Our study compares the performance of the Biofire BCID panel’s with culture as the gold standard method. We examine the percentage of agreement by both testing methods and predict the performance of the GenMarkDx ePlex BCID-FP panel based on culture results. We also look at the number of other yeasts not included in Biofire BCID panel that could be picked up by the GenMarkDx ePlex BCID-FP panel.MethodsPositive fungal blood cultures from July 1, 2018 to June 30, 2019 were run through the Biofire BCID panel. Culture results were used to extrapolate whether the GenMarkDx ePlex FP would provide any additional diagnostic benefit. Results were categorized as true or false positives and negatives as compared to culture as the gold standard.ResultsA total of 141 blood cultures were tested via the Biofire BCID panel for the identification of yeasts. Of these, 123 (87%) yielded Biofire results in concordance with culture results. We would expect these also to be positive on the GenMarkDx ePlex BCID-FP panel. In addition, 18 specimens (13%) would have tested positive on the GenMarkDx ePlex BCID-FP panel and not the Biofire BCID panel. These organisms were noted to be Candida lusitaniae (n=6), Cryptococcus neoformans (n=3), Candida dublinensis (n=2), and Candida keyfr (n=1). Organisms that were found on culture that were not detected by both GenMarkDx ePlex BCID-FP panel and Biofire BCID panel were Candida nivariensis (n=2), Pichia ohmeri (n=1), Trichospon species (n=2).ConclusionBased on these data, we expect that the ePlex would have correctly identified 95.9% of the yeasts in this patient population. This represents an additional 18 (13%) of specimens that could be detected rapidly from the positive blood culture if the GenMarkDx ePlex BCID-FP panel were used instead of the Biofire BCID panel. Early identification can influence the choice of antifungal agent. Less than 5 % of the yeasts would have remained unidentified by ePLex compared to 13% for Biofire.Disclosures All Authors: No reported disclosures

1167. Got Micafungin? The Incidence of Fungemia in Patients with Septic Shock

BackgroundTimely administration of antibiotics in patients presenting with sepsis decreases mortality, however evidence evaluating empiric antifungal coverage has been inconclusive. Recent data have shown no mortality benefit of empiric antifungal therapy in patients with ICU-acquired sepsis. Despite the lack of data, the Surviving Sepsis Campaign recommends empiric coverage for all suspected pathogens, including fungi. The purpose of this study is to determine the frequency of concomitant septic shock and fungemia at UMass Memorial Medical Center, a large tertiary care center.MethodsThis was a retrospective cohort study that included adult patients with a discharge diagnosis of severe sepsis or septic shock and/or fungemia admitted to UMMMC between October 2017 and October 2019. Patients with positive fungal blood cultures were further reviewed to identify if septic shock was present within 24 hours of blood culture collection. Additionally, risk factors for fungemia and 30-day mortality were assessed. Exclusion criteria included pregnancy, cultures from outside hospitals, incarceration, and hospice care.ResultsIn the analysis period, 4,253 patients had a discharge diagnosis of severe sepsis or septic shock. There were 68 cases of fungemia. In total, 54 patients with fungemia were included after applying exclusion criteria. Of the 54 patients with fungemia, 8 patients (15.1%) met criteria for septic shock at the time of positive blood culture, while 81% met SIRS criteria. Of the 4,253 total patients, 0.19% had coexisting fungemia and septic shock. At 30 days, four patients (7.4%) with both septic shock and fungemia had expired out of 12 total deaths. Three of the four deaths had multiple risk factors for fungemia including central line in place for greater than 48 hours, parenteral nutrition, and prolonged antibiotic therapy.ConclusionSeptic shock is a rare presentation of fungemia. Most patients with septic shock and fungemia have known risk factors. Despite recommendations by the Surviving Sepsis Campaign to initiate therapy for all likely pathogens, including fungal species, the incidence of fungemia presenting as septic shock at our academic medical center was very low and does not appear to warrant empiric coverage.Disclosures All Authors: No reported disclosures

657. Diagnostic Utility of Dedicated Fungal Blood Cultures for Diagnosis of Candidemia

BackgroundBlood culture techniques have improved to the point where they are considered sensitive enough for detection of Candida. Expert guidelines clarifying the utility of use of dedicated fungal isolator cultures are lacking, and we wondered what utility, if any, they add for the diagnosis of candidemia.MethodsAll patients with cultures between March 2016-February 2020 positive for Candida were examined via manual chart review, noting time to positivity and time of initiation of antifungal therapy.ResultsWe focused on cases of candidemia where a fungal culture was ordered and turned positive (59 out of the total 181 cases of candidemia). We eliminated an additional 10 cases where fungal cultures were sent while already on antifungal therapy or in patients already known to be fungemic, given our interest in de novo diagnoses. Another case was removed due to lack of clinical details, as the patient was discharged prior to culture results and managed at a different medical facility.There were 14 cases with discordant growth (fungal culture positive, bacterial culture negative). One patient passed away prior to culture results, but in the remaining 13 cases, the fungal culture changed clinical management, in most cases by prompting initiation of antifungal therapy.The remaining 36 cases involved with concordant growth between bacterial and fungal cultures. In 11 of those cases, the fungal culture isolated yeast 12 or more hours faster than its paired bacterial culture (average 40.7 +/- 26.6 hours). In 7 of these cases, the fungal culture changed management – in the remaining cases, the patient was already on empiric therapy.Among all cultures sent in patients not receiving antifungals that isolated Candida, the overall time to positivity for fungal cultures was 37.2 +/- 13 hours, while bacterial cultures took 54 +/- 26.4 hours.Fungal Culture Results ConclusionFungal cultures changed management in 20/59 cases of candidemia (34%) either by making the diagnosis faster than a bacterial culture or making it outright. Given the morbidity and mortality associated with candidemia, rapid diagnosis is critically important. More specific guidelines optimizing how to best utilize fungal cultures to help standardize practice among clinicians will be critical going forward.Disclosures Omai Garner, PhD, D(ABMM), Beckman Coulter (Scientific Research Study Investigator)

Diagnostic Performance of Serum (1,3) β-D Glucan to Detect Fungal Infection in Acute Leukemia Patients with Chemotherapy

Chemotherapy is a predisposing factor for infection in patients with malignancy, while culture, as the gold standard,limits the diagnosis of fungal infections. (1,3) β-D glucans, the most abundant polysaccharide component of the fungal wall,are increased in patients with Invasive Fungal Infections (IFI). This research was an analytical observational study with across-sectional approach involving 60 acute leukemia patients who received chemotherapy with suspicion of fungalinfection at the General Hospital of Dr. Moewardi, Surakarta, from September to October 2019. Fungal blood cultures andserum (1,3) β-D glucan levels by the enzyme-linked immunoassay method were examined. Diagnostic tests were performedto determine sensitivity, specificity, Positive Predict Value (PPV), Negative Predict Value (NPV), Positive Likehood Ratio (PLR),Negative Likehood Ratio (NLR), and the serum's accuracy value (1,3) β-D glucan levels to fungal culture. Most (88.3%) ofpatients were diagnosed with Acute Lymphocytic Leukemia (ALL), maintenance chemotherapy phase (51.3%), risk factorsfor neutropenia (50%), and intravenous (IV) line use (56.7%). Serum (1,3) β-D glucan levels in patients with positive fungalcultures (4) in blood samples had a median of 482.87 (476.13-640.56) pg/mL, while patients with negative fungal cultures(56) had a mean±SD 298,68±114,39 pg/mL. Diagnostic test with a cut-off of 471,717 pg/mL showed sensitivity of 100.0%,specificity of 96.4%, NPV of 100%, PLR of 28.00, and NLR of 0.00 with an Area Under Curve (AUC) value of 0.982 andCoefficient Interval (CI) 95% (0.950-1.014). The measurement of serum (1,3) β-D glucan at a cut-off value of 471,717 pg/mLshowed good performance as a biomarker for diagnosing and screening IFIs.

Evaluation of Rapid Sepsityper\xae protocol and specific MBT-Sepsityper module (Bruker Daltonics) for the rapid diagnosis of bacteremia and fungemia by MALDI-TOF-MS

During bloodstream infections, rapid adaptation of empirical treatment according to the microorganism identified is essential to decrease mortality. The aim of the present study was to assess the microbiological performances of a new rapid version of the Sepsityper® kit (Bruker Daltonics) allowing identification of bacteria and yeast by MALDI-TOF mass spectrometry directly from positive blood cultures in 10 min and of the specific MBT-Sepsityper module for spectra analysis, designed to increase identification performance. Identification rates were determined prospectively on 350 bacterial and 29 fungal positive blood cultures, and compared to conventional diagnostic method. Our rapid diagnosis strategy (Rapid Sepsityper® protocol: one spot with and one without formic acid extraction step) combined to MBT-Sepsityper module provided 65.4%, 78.9% and 62% reliable identification to the species level of monomicrobial positive blood cultures growing respectively Gram-positive, Gram-negative bacteria or yeast. Importantly, identification rates of Gram-positive bacteria were higher in anaerobic than in aerobic bottles (77.8% vs 22.2%; p = 0.004), if formic acid extraction step was performed (60.8% vs 39.2%; p = 1.8e−6) and if specific MBT-Sepsityper module was used (76.2% vs 61.9%, p = 0.041) while no significant differences were observed for Gram-negative bacteria. For yeasts identification, formic acid extraction step improved rapid identification rate by 37.9% while the specific MBT-Sepsityper module increased overall performances by 38%, providing up to 89.7% reliable identification if associated with the standard Sepsityper® protocol. These performances, associated with a reduce turnaround time, may help to implement a rapid identification strategy of bloodstream infections in the routine workflow of microbiology laboratories.

DISSEMINATED PULMONARY HISTOPLASMOSIS IN AN IMMUNOCOMPETENT PREVIOUSLY HEALTHY INDIVIDUAL

SESSION TITLE: Medical Student/Resident Chest Infections Posters SESSION TYPE: Med Student/Res Case Rep Postr PRESENTED ON: October 18-21, 2020 INTRODUCTION: Histoplasmosis infection is clinically silent in over 99% of immunocompetent individuals in endemic areas. If symptoms occur most are non-specific and self-limited. However, disseminated histoplasmosis can develop in immunocompetent patients with devastating consequences including significant mortality. CASE PRESENTATION: A previously healthy 45-year-old man presented after 2-3 weeks of worsening dyspnea, non-productive cough, and 20lb weight loss. Outpatient work up showed concern for atypical pneumonia, necessitating treatment with three escalating oral antibiotics showing no improvement prompting admission. He was transferred from an outside hospital intubated progressing toward ARDS requiring vasopressor support. On imaging there was diffuse bilateral peribronchovascular consolidation, groundglass opacities with septal thickening, hepatosplenomegaly, and retroperitoneal lymphadenopathy. Testing included respiratory viral panel positive for rhinovirus, fungitell, fungal blood cultures, urine antigens for histoplasmosis and blastomyces, and bronchoscopy. He was placed on broad spectrum antibiotics and itraconazole. The following day his fungal regimen was advanced to amphotericin B. Three days later his urine histoplasmosis antigen returned positive followed by a positive fungitell and lastly bronchoscopy cultures grew histoplasmosis. He required a month long hospital stay with aggressive ventilator support requiring tracheostomy, severe fevers requiring external cooling, and significant ATN that all slowly improved. Work up for an underlying etiology for possible immunosuppression was unrevealing. He was discharged to an extended care facility where he was liberated from the ventilator within a few days of hospital discharge with later tracheostomy decannulation. He remains on itraconazole 9 months later. He has returned to his regular activities. Most recent imaging shows mild scarring and residual consolidative and nodular opacities. DISCUSSION: Initial generalized symptoms and the rarity of disseminated histoplasmosis in immunocompetent patients can cause it to be overlooked on the differential, leading to significant delays in care. Further delays can occur as testing typically takes multiple days to result and may require bronchoscopy. In this case, a broad differential was considered with a decisive plan of starting the patient on amphotericin days prior to test results likely significantly improving overall prognosis. CONCLUSIONS: Timely diagnosis and treatment of disseminated histoplasmosis requires a broad differential diagnosis coupled with a high level of clinical suspicion. Aggressive treatment may need to begin prior to definitive diagnosis in patients with significant disease burden. Reference #1: Kauffman CA. Histoplasmosis: a clinical and laboratory update. Clin Microbiol Rev. 2007;20(1):115-132. doi:10.1128/CMR.00027-06 Reference #2: Ling Q, Zhu W, Lu Q, Jin T, Ding S. Disseminated histoplasmosis in an immunocompetent patient from an endemic area: A case report. Medicine (Baltimore). 2018;97(29):e11486. doi:10.1097/MD.0000000000011486 DISCLOSURES: No relevant relationships by Benjamin Ramser, source=Web Response No relevant relationships by Joy Wang, source=Web Response No relevant relationships by Steven Young, source=Web Response

S2533 Peritoneal M. tuberculosis Infection Presenting as Pseudomyxoma Peritonei

INTRODUCTION: Abdominal M. tuberculosis infections are rare in resource rich settings. When it occurs it can affect all areas of the gastrointestinal tract, solid viscera, peritoneum, and lymphatic system. Here we describe a rare instance of peritoneal tuberculosis mimicking intraabdominal malignancy and presenting with CT imaging findings pathognomonic for pseudomyxoma peritonei. CASE DESCRIPTION/METHODS: A 26 year old African American male prison inmate presented with four months of gradually worsening abdominal pain, fever, night sweats, and an unintentional weight loss of 18 kg. On admission he was febrile and tachycardic. Physical exam was remarkable for diffuse abdominal tenderness. Laboratory data was significant for hemoglobin of 6.9 g/dL and iron studies consistent with anemia of chronic disease. CT scan of his abdomen and pelvis demonstrated extensive mucinous implants and scalloping of the liver and spleen. Bacterial and fungal blood cultures were repeatedly negative as were fungal serologies for Coccidioides, Histoplasma, and Blastomyces. Fine needle aspiration of an intrabdominal mucinous implant found necrotizing granulomas negative for acid fast bacilli and malignant cells. An exploratory laparoscopy performed to obtain adequate biopsy sample during which peritoneal studding was observed intraoperatively. Biopsy revealed necrotizing granulomas positive for M. tuberculosis. He was initiated on RIPE therapy and achieved resolution of symptoms. DISCUSSION: Pseudomyxoma peritonei is a clinical syndrome characterized by diffuse gelatinous ascites that impresses on the liver and spleen and causes their edges to appear scalloped on CT imaging. It is typically associated with intrabdominal mucus secreting neoplasms, particularly mucinous adenocarcinoma of the appendix. This case represents an exceedingly rare presentation of peritoneal tuberculosis. Given that one-fifth of cases of tuberculosis in the US are extrapulmonary, early recognition of the signs of peritoneal tuberculosis and its confounders can expedite initiation of appropriate therapy.Figure 1.: Visceral scalloping from mucinous ascites.Figure 2.: Intraoperative laparoscopic imaging of peritoneal implants.Figure 3.: Intraoperative laparoscopic imaging of peritoneal implants.

P1188ICODEXTRIN-INDUCED CHEMICAL PERITONITIS IN A PATIENT WITH CARDIORENAL SYNDROME

Abstract Background and Aims The main cause of morbidity among patients who undergo peritoneal dialysis (PD) remains peritonitis. However there are rare references in published literature about the development of sterile peritonitis related to exposure to PD materials used to overcome the complications from glucose solutions.The objective of the present case report is to enhance clinical suspicion in order to avoid unnecessary antibiotic treatment or catheter removal. Case description A 56-year-old male became dialysis dependent from June 2017 due to cardiorenal syndrome type II, after multiple hospitalizations for pulmonary edema within a year. The patient was prescribed icodextrin 7,5% as a single 10-hour nocturnal dwell with dry day period in continuous ambulatory PD .At his scheduled appointment during drainage of the nighttime dialysate, slightly cloudy effluent with a lot of pale yellow substances “sesame” like, were observed without any signs of peritonitis or pathology from the Catheter exit site based on Twardowski classification.The dialysate contained 600 cells/ml. The floating yellow substances after laboratory and light microscopy examination accumulated epithilium cells with rare macrophages were found.Due to these findings,icodextrin was discontinued and empiric antibiotic therapy started including intraperitoneal administration of vancomycin and ceftazidime .After 3 days the floating substances disappeared and the number of cells in dialysate progressively decreased but not within the normal range so empirical antifungal therapy was decided. Daily repeated aerobic, anaerobic and fungal cultures of effluent and blood were negative as well the culture of exit site. ADA (adenosine deaminase test) and β-koch culture were also negative. Computed tomography scan of abdomen and colonoscopy showed no pathology.Due to fluid overload an additional long-term dwell of icodextrin solution was initiated.The re-exposure doubled the number of cells (310 cells/ml) and a second sample was sent for cytological examination which showed plenty of hyperplastic mesothelial cells in piles and isolated, abundant mature lymphocytes, few polymorphonuclear leukocytes as well as several mast cells. Based on these observations peritoneal cavity remained empty for 24 hours. Afterwards a 4-hour exchange of glucose-containing solution of 1,36%, 2,27%, 3,86% and finally of icodextrin was held once daily. The cells were 155, 120, 105 and 450/ml respectively with lymphocytes and mast cells being predominant.Based on these data, it was considered that the exposure to icodextrin produced hypersensitivity and the empiric antibiotic therapy was discontinued.The catheter was removed and sent for culturing which was negative.The biopsy of peritoneal membrane revealed mild fibrous sclerotic lesions, fibrous texture, partially collagenized membrane lacking mesothelial lining and exhibiting sparse chronic nonspecific inflammatory infiltration involving rare neutrophilic leukocytes. Plenty of small blood vessels were observed, with no immunomorphological features including IgG4 staining. These findings were attributed to chemical peritonitis from icodextrin solution ant the patient switched dialysis modality. Discussion:the use of icodextrin in peritoneal dialysis patients has numerous advantages over glucose-based dialysates including improved ultrafiltration, better fluid control and less hypertension, especially in patients with cardiorenal syndrome. In the face of evident benefits, clinicians should, however, be aware of the potential of icodextrin to induce chemical sterile peritonitis.

Clinical Utility of Anaerobic and Fungal Blood Cultures in the Pediatric Oncologic Population.

If there is a concern for sepsis in a pediatric patient an aerobic blood culture is obtained. A febrile or ill oncology patient will often be evaluated with aerobic, anaerobic, and fungal blood cultures. There is to our knowledge little evidence to confirm the added benefit of broadly obtaining these cultures. A retrospective analysis of blood cultures from patients in the oncology and hematopoietic stem cell transplant wards at Children's National Medical Center between January 2010 and April 2017. Positive anaerobic and fungal cultures were evaluated for corollary positive aerobic cultures from the same time frame (+/-24 h). Unique isolates were designated as those positive anaerobic and fungal cultures without positive aerobic cultures and evaluated with detailed chart review. A total of 10,950 cultures were evaluated during the study period: 6579 aerobic, 2391 anaerobic cultures, 1980 fungal. In total, 419 positive aerobic, 140 positive anaerobic, and 43 positive fungal cultures were reviewed. Among these, 22 unique anaerobic cultures and 21 unique fungal cultures met case criteria. Only 7 cultures of obligate anaerobes were observed: 4 Clostridial spp., 2 Propionobacterium acnes, and 1 Peptostreptococcus spp. Thirteen of 21 fungal isolates consisted of a single colony and were regarded as probable contaminants. Penicillium, Cladosporium, and dematiaceous molds were in greatest frequency. Potential risk factors for patients with breakthrough isolates were evaluated and described. There is little increased yield from the use fungal and anaerobic blood cultures in addition to aerobic blood cultures in the routine evaluation of pediatric oncology and bone marrow transplant patients. Fungal and anaerobic blood cultures and should be reserved for cases with high clinical suspicion.

Ophthalmology Consultation to Detect Endogenous Endophthalmitis: Clinical Characteristics in Consulted Versus Diagnosed Cases Among At-Risk Inpatients.

Predisposing factors for ophthalmology consultations and endogenous endophthalmitis were compared among inpatients with systemic infection. This was a retrospective cohort study in a tertiary care hospital between January 1, 2010, and December 31, 2014. Multivariable logistic regression was utilized. There were 9,527 encounters identified with systemic infection. The 5-year incidence rate was 8.4% (803/9,527) for consultations and 0.3% (25/9,527) for endophthalmitis. Factors most associated with consultations included positive fungal blood cultures and HIV. Factors most associated with endophthalmitis included positive blood fungal cultures and endocarditis. Four of 25 endophthalmitis patients lacked positive blood cultures; six of 20 endophthalmitis patients with adequate mentation were asymptomatic. Positive blood fungal cultures were strongly associated with both endophthalmitis and consultations. Endocarditis was strongly associated with endophthalmitis but less associated with consultation and may warrant increased attention. Neither presence of symptoms nor positive cultures may be sufficiently accurate to determine need for consultation. [Ophthalmic Surg Lasers Imaging Retina. 2020;51:159-169.].

Chronic Disseminated Candidiasis During Hematological Malignancies: An Immune Reconstitution Inflammatory Syndrome With Expansion of Pathogen-Specific T Helper Type 1 Cells.

Chronic disseminated candidiasis (CDC) is a rare disease that mostly occurs after chemotherapy-induced prolonged neutropenia in patients with hematological malignancies. It is believed to ensue from Candida colonization, breach of the intestinal epithelial barrier, and venous translocation to organs. Fungal blood or liver biopsy cultures are generally negative, suggesting the absence of an ongoing invasive fungal disease. To unravel the contribution of the immune system to CDC pathogenesis, we undertook a prospective multicentric exploratory study in 44 CDC patients at diagnosis and 44 matched controls. Analysis of Candida-specific T-cell responses using enzyme-linked immunospot assays revealed higher numbers of interferon (IFN)γ-producing T cells reactive to mp65 or candidin in 27 CDC cases compared with 33 controls. Increased plasma levels of soluble CD25, interleukin (IL)-6, IL-1β, tumor necrosis factor-α, and IL-10 and lower levels of IL-2 were observed in CDC patients versus controls. Neutrophilia and higher levels of CD4 and CD8 T-cell activation were found in CDC patients as well as increased proportions of CXCR3-expressing TCRγδ +Vδ2+ cells. The expansion of Candida-specific IFNγ-producing T cells together with features of T-cell activation and systemic inflammation identified here support the view that CDC belongs to the broad spectrum of fungal-associated immune reconstitution inflammatory syndromes.

249. Limited Diagnostic Utility of Extended Aerobic Blood Culture Incubation for Fungal Pathogen Detection

BackgroundBlood cultures are an important diagnostic tool for the detection of fungemia. At our institution, fungal blood cultures consist of aerobic blood culture with incubation extended from the standard 5 days to 14 days. Orders for fungal blood cultures exist in multiple electronic order sets for selected populations, including oncology and bone marrow transplant services.MethodsTo determine the yield of fungal blood cultures at our institution, a 570-bed tertiary-care referral center, we extracted all fungal blood culture results over a 4.5-year period (January 1, 2014–May 15, 2018) from a Laboratory Information System.ResultsOf the 21,657 fungal blood cultures performed, only 202 (0.9%) demonstrated growth and 189 (0.9%) grew fungal organisms. The majority (90%, n = 182/202) of positive fungal blood cultures grew a Candida or other yeast species. 96% (n = 174/182) of the fungal cultures that grew yeast would have been detected with standard bacterial blood culture. Eight of these cultures became positive during the extended hold period and grew a Candida species. All 8 cultures were collected from patients who had previous positive cultures for the same Candida species detected by standard incubation. Five fungal blood cultures from 4 patients turned positive after 5 days of incubation. Among these, two additional fungal pathogens were identified including 2 cases of Lomentospora prolificans and 2 cases of Fusarium. In both cases of L. prolificans and one case of Fusarium, the patients had previous positive blood cultures that detected the same organism with standard incubation. One patient with Fusarium had no previous positive blood cultures, but had multiple tissue cultures positive for Fusarium. The remaining cultures that turned positive after 5 days of incubation contained bacterial organisms, a number of which were considered clinically insignificant (e.g., Cutibacterium species).ConclusionThese data suggest that extended incubation of aerobic blood culture bottles has limited diagnostic utility beyond standard bacterial blood culture for detection of fungemia. Fungal blood cultures represent an opportunity for improved diagnostic test stewardship, and use should be restricted to selected situations in consultation with Infectious Diseases or Laboratory Medicine.Disclosures All authors: No reported disclosures.

256. Optimizing the Clinical Utilization of T2 Rapid Candida Panel at a Large Community Hospital

BackgroundCandidemia is the fourth leading hospital-acquired bloodstream infection with an estimated mortality rate of 35%. Fungal blood cultures result in at least five days and fail to identify 40% of Candida infections. The T2 Candida Panel is a diagnostic test which utilizes whole blood to provide rapid detection of five Candida varieties. It has a 91% sensitivity and 99% specificity rate and enables physicians to initiate or de-escalate therapy rapidly, possibly decreasing mortality. However, practical utilization clinically has not been studied. Our aim is to evaluate the appropriate utilization of the T2 Candida Panel in a large community hospital.MethodsA retrospective chart review of hospitalized with a T2 Candida Panel result from December 2015 to June 2018 was performed. The panel was restricted and could only be ordered by two specialties, Infectious Disease and Oncology. Baseline demographics and patient characteristics were collected. Endpoints assessed included patient outcomes, antifungal medication use, T2 Candida panel results, corresponding blood culture results, time to appropriate therapy and duration of therapy.ResultsA total of 628 T2 Candida panels resulted during the study period with 56.6% involving the intensive care setting. The average age was 59.5 years with 52.5% of the population being male. Of the total, 8.1% (n = 60) were positive. Only three patients had a positive fungal blood culture result with a negative T2 panel collected at the same time (sensitivity 94.3%, 95% CI 80.8–99.3; specificity 94.2%, 95% CI 91.4–96.3). 264 (42%) were ordered with concomitant antifungal therapy and 48.1% underwent de-escalation of therapy based on T2 result. The average time to de-escalation was 137 hours. Of the positive results, 40 (66.7%) had an antifungal ordered when the T2 panel was ordered and 30 (50%) were switched to appropriate therapy after T2 resulted in an average time of 11 hours.ConclusionOur data shows that while the T2 Candida Panel demonstrated faster and more sensitive results, there was still a considerable delay in achieving appropriate therapy. The variation in utilization of the T2 Candida Panel indicates that further intervention regarding appropriate use of the panel is required. Disclosures All authors: No reported disclosures.

2495 Spontaneous Fungal Peritonitis Secondary to Candida glabrata in a Patient With Cardiac Cirrhosis

INTRODUCTION: Spontaneous fungal peritonitis (SFP) is an uncommon, but serious complication of liver cirrhosis. In one study, the one-month mortality rate was 73.3% as compared to 28% in SBP alone. The mortality remains high despite appropriate antifungal therapy partly due to delayed diagnosis. CASE DESCRIPTION/METHODS: We present a case of a 67 years-old male patient who presented with acute confusion and worsening abdominal distension for unknown duration. He has history of heart failure with reduced ejection fraction secondary to ischemic cardiomyopathy and liver cirrhosis presumed secondary to heart failure. He was found to have acute hepatic encephalopathy, anasarca, acute kidney injury, and septic shock. Abdominal exam showed tender, distended abdomen with positive fluid thrill. Spontaneous bacterial peritonitis (SBP) was suspected and ascitic fluid analysis was sent. It reported nucleated cells 3766/uL, 80% neutrophils, SAAG 1.7, glucose &lt;20 mg/dl, and total protein 3.2 g/dl. Computed tomography of abdomen and pelvis without contrast showed massive ascites, but there was no evidence of bowel perforation (Figure 1). He was treated with Vancomycin and Zosyn for SBP and lactulose for hepatic encephalopathy. On day 3, gram stain of ascitic fluid reported budding yeast, and he was started on anidulafungin. The final culture reported Candida glabrata. Bacterial and fungal blood cultures were negative. Despite treatment, his encephalopathy persisted, and he had rapid accumulating ascitic fluid. Ascitic fluid culture was repeated which reported the same. A repeat CT abdomen showed perihepatic hematoma and free intraperitoneal air (Figure 2). He underwent exploratory laparotomy that revealed duodenal perforation. Despite surgical repair and antifungal, septic shock progressed, and patient died from multi-organ failure. Candida glabrata was sensitive to anidulafungin on retrospective review of sensitivity report. DISCUSSION: Although initial ascitic fluid analysis suggested secondary peritonitis, CT scan was negative for perforation or loculated infection. Our case highlights the high mortality rate of Candida peritonitis despite appropriate treatment. It is likely secondary to delayed antifungal and undiagnosed bowel perforations.

2746 Medical Management of Gastric Mucormycosis in an Immunocompetent Patient

INTRODUCTION: Mucormycosis is a rare and life-threatening cause of invasive fungal infection largely found in immunocompromised patients. Prevalence has increased in patients without risk factors. This is a case of an otherwise healthy female, found to have invasive gastric mucormycosis, and her medical management. CASE DESCRIPTION/METHODS: 54-year-old non-diabetic Ethiopian female with PMH HTN was admitted to the hospital with 2 months of nausea, vomiting, abdominal pain, fever, and melena. She reports use of omeprazole up to 4 times daily with no improvement. Pertinent findings include Temp 104 F, NIBP 90/40. Physical exam showed diffuse tenderness of the abdomen worse in epigastrium. WBC 22.8; other labs were normal. EGD showed a wide patch of necrotic and edematous folds of the fundus and proximal body of the stomach as well as submucosal hemorrhage in the fundus. Petechiae were seen in the antrum. Fundal biopsies were obtained, which showed invasive fungal hyphae, described as broad, non-septate, with branching consistent with the Mucor genus. Testing for TB, HIV, malaria, malignancy were negative. Fungal blood cultures were negative. Bone marrow biopsy was negative. Her only travel outside of the US in the last 10 years was to Ethiopia about 2 years prior. Her only non-US food source were chili peppers imported from Ethiopia. A course of liposomal amphotericin was recommended for 8 weeks for the mucor. Surgery recommended no intervention unless the patient developed peritonitis. She will be transitioned to oral posaconazole upon completion of the amphotericin. Her presenting symptoms, labs, and vitals have normalized. DISCUSSION: Mucormycosis is an uncommon cause of fungal infections of the GI tract with a high mortality. Most cases involve diabetics, neutropenic adults, immunocompromised patients, hematologic malignancy, or premature neonates. Our patient didn’t fall into any of these categories. The GI tract is only involved in approximately 7% of cases. The stomach being most common (58%) followed by the colon (32%). Endoscopic biopsy is needed for diagnosis where fungal hyphae are seen. Fungal cultures are positive in only 50% of cases. Because of the high risk of perforation and exsanguination, a combined approach of surgical and medical treatment is recommended. In this case, surgical intervention was only recommended in the case of an emergency. This patient without known risk factors for mucormycosis clinically improved without surgical resection.

64-Year-Old Man With Subacute Altered Mental Status and Headache

64-Year-Old Man With Subacute Altered Mental Status and Headache