scholarly journals Epidemiology of Positive Blood Cultures due to Multidrug-Resistant Organisms From an Academic Center and Community Hospitals

2020 ◽  
Vol 41 (S1) ◽  
pp. s473-s473
Author(s):  
Frances Boly ◽  
Margaret Olsen ◽  
Dustin Stwalley ◽  
Jason Burnham ◽  
Jennie Kwon
Keyword(s):  
Risk Factors ◽  
Rural Community ◽  
Urine Culture ◽  
Academic Medical Center ◽  
Tertiary Care ◽  
Multidrug Resistant ◽  
Blood Cultures ◽  
Community Hospitals ◽  
Academic Center ◽  
Multidrug Resistant Organisms

Background: Multidrug-resistant organisms (MDROs) are a threat to public health. The objective of this study was to define risk factors and outcomes of patients with positive blood cultures due to MDROs in 2 rural community hospitals as compared to a tertiary-care academic center. Methods: Retrospective cohort study with IRB approval from 1 tertiary-care academic center and 2 rural community hospitals (Barnes-Jewish [BJH], Parkland Health Center, and Missouri Baptist Sullivan Hospital) from July 1, 2013, to August 1, 2018. Demographics, comorbidities, procedures, outcomes, and blood and urine culture data were collected from the BJH informatics database for hospitalized patients with positive blood cultures due to MDROs. MDROs were defined according to European and US CDC standards. Results: Of the patients with positive blood cultures growing organisms with the potential to be MDR, 1,065 (55%) blood cultures grew MDROs from the academic center and 157 (33%) grew MDROs from the 2 community hospitals (P < .0001). Among these, methicillin-resistant Staphylococcus aureus (35% at BJH and 37% at community hospitals) and MDR Enterobacteriaceae (29% at BJH and 36% at community hospitals) were the most common organisms grown from blood cultures at all hospitals. Among patients with positive MDRO blood cultures, 60% were males and 69% were white, with a mean age of 58 years at BJH. At the community hospitals, 47% were male and 99% were white, with a mean age of 66 years. The most common comorbidity in patients with MDRO bacteremia at BJH was cancer, compared to diabetes at the community hospitals. At all hospitals, >33% of patients with MDRO bacteremia required an ICU stay. Also, 17% of patients with MDRO bacteremia at BJH died during hospitalization compared to 4% at the community hospitals. Among individuals with positive MDRO blood cultures, 9% had a matching isolate from a urine culture at BJH and 46% had a matching urine isolate at the community hospitals. Conclusions: At an academic medical center, the most common organisms identified in MRDO-positive blood cultures included MRSA, MDR Enterobacteriaceae, and VRE. However, at the community hospitals, MRSA, MDR Enterobacteriaceae, and ESBL Enterobacteriaceae were most common. Patients with a positive MDRO blood culture were more likely to have a matching isolate from urine culture at a community hospital compared to the academic center. Further research is needed regarding risk factors and interventions to prevent, detect, and treat MDRO infections.Funding: NoneDisclosures: Margaret A. Olsen reports consulting fees for contract research from Pfizer, Merck, and Sanofi Pasteur.

scholarly journals A study of risk factors for bacteremia caused by urinary tract infections

2018 ◽  
Vol 9 (5) ◽  
pp. 25-30
Author(s):  
Muralidhar Varma ◽  
Sravan Kumar Peravali ◽  
Vandana KE ◽  
Asha Kamath ◽  
Rahul Singh
Keyword(s):  
Risk Factors ◽  
Urinary Tract ◽  
Urinary Tract Infections ◽  
Urine Culture ◽  
Tertiary Care ◽  
Blood Cultures ◽  
Medical Sciences ◽  
E Coli ◽  
Tract Infections ◽  
Control Study

Background: Urinary tract infections are not only one of the most common infections, but also one of the most common sources of bacteremia in both the general population and hospitalized patients.Aims and Objectives: The objective of this study was to identify risk factors for bacteremia caused by urinary tract infections.Materials and Methods: This was a prospective case control study conducted from October 2012 to July 2014in a tertiary care teaching hospital in southern India. Urinary tract infections were diagnosed based on the CDC criteria.Patients witha set of blood cultures and urine culture isolating same organism were grouped as cases while patients with urine culture alone isolating organism with sterile blood cultures were identified as controls.Results: Out of the 198 patientsin the study, 66 were cases while 132 were controls. E coli was the most organism isolated (81% of cases and 66% of controls). Risk factors for bacteremia based on univariate and multivariate analysis were diabetes mellitus with uncontrolled sugars (univariate: p=0.001; OR=5.250 [2.044-13.582]; and multivariate: p=0.01; OR= 6.023 [1.52-23.51]) and pyelonephritis (univariate: p=0.001; OR=6.56 [2.87-1.48]; and multivariate: p=0.047; OR=4.95 [1.02-24.12]).Conclusion: Upper UTI and complicated UTI patients should be evaluated for bacteremia since prompt and targeted treatment may be required.Asian Journal of Medical Sciences Vol.9(5) 2018 25-30

scholarly journals Multi-country cross-sectional study of colonization with multidrug-resistant organisms: protocol and methods for the Antibiotic Resistance in Communities and Hospitals (ARCH) studies

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Aditya Sharma ◽  
Ulzii-Orishikh Luvsansharav ◽  
Prabasaj Paul ◽  
Joseph D. Lutgring ◽  
Douglas R. Call ◽  
...  
Keyword(s):  
Risk Factors ◽  
Multidrug Resistant ◽  
Population Based ◽  
Community Dwelling ◽  
Mitigation Strategies ◽  
Invasive Infection ◽  
Cross Sectional ◽  
Global Epidemiology ◽  
Multidrug Resistant Organisms ◽  
High Threat

Abstract Background Antimicrobial resistance is a global health emergency. Persons colonized with multidrug-resistant organisms (MDROs) are at risk for developing subsequent multidrug-resistant infections, as colonization represents an important precursor to invasive infection. Despite reports documenting the worldwide dissemination of MDROs, fundamental questions remain regarding the burden of resistance, metrics to measure prevalence, and determinants of spread. We describe a multi-site colonization survey protocol that aims to quantify the population-based prevalence and associated risk factors for colonization with high-threat MDROs among community dwelling participants and patients admitted to hospitals within a defined population-catchment area. Methods Researchers in five countries (Bangladesh, Chile, Guatemala, Kenya, and India) will conduct a cross-sectional, population-based prevalence survey consisting of a risk factor questionnaire and collection of specimens to evaluate colonization with three high-threat MDROs: extended-spectrum cephalosporin-resistant Enterobacteriaceae (ESCrE), carbapenem-resistant Enterobacteriaceae (CRE), and methicillin-resistant Staphylococcus aureus (MRSA). Healthy adults residing in a household within the sampling area will be enrolled in addition to eligible hospitalized adults. Colonizing isolates of these MDROs will be compared by multilocus sequence typing (MLST) to routinely collected invasive clinical isolates, where available, to determine potential pathogenicity. A colonizing MDRO isolate will be categorized as potentially pathogenic if the MLST pattern of the colonizing isolate matches the MLST pattern of an invasive clinical isolate. The outcomes of this study will be estimates of the population-based prevalence of colonization with ESCrE, CRE, and MRSA; determination of the proportion of colonizing ESCrE, CRE, and MRSA with pathogenic characteristics based on MLST; identification of factors independently associated with ESCrE, CRE, and MRSA colonization; and creation an archive of ESCrE, CRE, and MRSA isolates for future study. Discussion This is the first study to use a common protocol to evaluate population-based prevalence and risk factors associated with MDRO colonization among community-dwelling and hospitalized adults in multiple countries with diverse epidemiological conditions, including low- and middle-income settings. The results will be used to better describe the global epidemiology of MDROs and guide the development of mitigation strategies in both community and healthcare settings. These standardized baseline surveys can also inform future studies seeking to further characterize MDRO epidemiology globally.

Risk factors and clinical outcomes associated with blood culture contamination

2021 ◽  
pp. 1-7
Author(s):  
Justin M. Klucher ◽  
Kevin Davis ◽  
Mrinmayee Lakkad ◽  
Jacob T. Painter ◽  
Ryan K. Dare
Keyword(s):  
Risk Factors ◽  
Logistic Regression ◽  
Blood Culture ◽  
Hospital Mortality ◽  
Clinical Outcomes ◽  
Tertiary Care ◽  
Blood Cultures ◽  
Hospital Charges ◽  
Patient Specific ◽  
Contaminated Blood

Abstract Objective: To determine patient-specific risk factors and clinical outcomes associated with contaminated blood cultures. Design: A single-center, retrospective case-control risk factor and clinical outcome analysis performed on inpatients with blood cultures collected in the emergency department, 2014–2018. Patients with contaminated blood cultures (cases) were compared to patients with negative blood cultures (controls). Setting: A 509-bed tertiary-care university hospital. Methods: Risk factors independently associated with blood-culture contamination were determined using multivariable logistic regression. The impacts of contamination on clinical outcomes were assessed using linear regression, logistic regression, and generalized linear model with γ log link. Results: Of 13,782 blood cultures, 1,504 (10.9%) true positives were excluded, leaving 1,012 (7.3%) cases and 11,266 (81.7%) controls. The following factors were independently associated with blood-culture contamination: increasing age (adjusted odds ratio [aOR], 1.01; 95% confidence interval [CI], 1.01–1.01), black race (aOR, 1.32; 95% CI, 1.15–1.51), increased body mass index (BMI; aOR, 1.01; 95% CI, 1.00–1.02), chronic obstructive pulmonary disease (aOR, 1.16; 95% CI, 1.02–1.33), paralysis (aOR 1.64; 95% CI, 1.26–2.14) and sepsis plus shock (aOR, 1.26; 95% CI, 1.07–1.49). After controlling for age, race, BMI, and sepsis, blood-culture contamination increased length of stay (LOS; β = 1.24 ± 0.24; P < .0001), length of antibiotic treatment (LOT; β = 1.01 ± 0.20; P < .001), hospital charges (β = 0.22 ± 0.03; P < .0001), acute kidney injury (AKI; aOR, 1.60; 95% CI, 1.40–1.83), echocardiogram orders (aOR, 1.51; 95% CI, 1.30–1.75) and in-hospital mortality (aOR, 1.69; 95% CI, 1.31–2.16). Conclusions: These unique risk factors identify high-risk individuals for blood-culture contamination. After controlling for confounders, contamination significantly increased LOS, LOT, hospital charges, AKI, echocardiograms, and in-hospital mortality.

scholarly journals Evaluation of Specific Risk Factors and Outcomes of Colistin-Resistant Klebsiella pneumoniae Infections in a Tertiary Care Centre - An Observational Study

2021 ◽  
Vol 4 (2) ◽  
pp. 1-6
Author(s):  
Prakash Shastri ◽  
Shamanth A Shankarnarayan
Keyword(s):  
Risk Factors ◽  
Blood Stream Infection ◽  
Tertiary Care ◽  
Venous Catheter ◽  
Blood Stream ◽  
Central Line ◽  
Multidrug Resistant ◽  
Automated System ◽  
Tertiary Care Centre ◽  
Broth Microdilution Method

Background: Incidence of multidrug resistant Klebsiella pnumoniae infections are increasing globally especially in ICUs. Aim: We evaluated the burden of colistin resistant K. pneumoniae (ColR KP) and the risk factors associated with the outcome of these patients. Methods: Consecutive patients developing K. pneumoniae infections were included. K. pneumoniae from endotracheal tube and catheterized urine sample, having cell count <105 cfu/ml, and which did not necessitate a change in antibiotics as per the treating physicians was considered as colonizer. Demographic and clinical details were collected and samples were processed as per standard protocol. Any growth was identified and its antimicrobial susceptibility was carried out by using Vitek 2 automated system. Minimum inhibitory concentration of >4 μg/ml for Colistin was considered as resistant. The resistant isolates were confirmed with Broth microdilution method. Risk factor associated with the outcome of ColR KP was analyzed. Findings: Burden of K. pneumoniae infection was 50.02 per 1000 admissions. K. pneumonie (n=155) was isolated from patients with ventilator associated pneumonia (84, 54.2%), followed by blood stream infection (49, 31.6%) and urinary tract infection (22, 14.2%). ColR KP and intermediate (ColI KP) isolates were 58 (37.41%) and 97 (62.6%) respectively. Among ColR KP infected patients 32 (55.1%) died whereas 26 (44.8%) patients were discharged. Higher mortality was witnessed in ColI KP cases (75, 77.3%) compared to ColR-KP cases (32, 55.1%) (p=0.004; OR=2.77; 95% CI=1.37 to 5.59). Colistin resistance and presence of central line were independently associated with mortality. Conclusion: Colistin resistant K. pneumoniae infections among ICU patients are on rise. Presence of central venous catheter and resistance to colistin were independent predictors of mortality.

scholarly journals 1764. The Gut: A Veiled Reservoir for Multidrug-resistant Organisms (MDROs) Below the Tip of the Iceberg

2018 ◽  
Vol 5 (suppl_1) ◽  
pp. S63-S63
Author(s):  
Teppei Shimasaki ◽  
Yoona Rhee ◽  
Rachel D Yelin ◽  
Michelle Ariston ◽  
Stefanie Ollison ◽  
...  
Keyword(s):  
Medical Center ◽  
Care Center ◽  
Tertiary Care ◽  
Multidrug Resistant ◽  
Resistance Mechanisms ◽  
Targeted Prevention ◽  
Prevention Measures ◽  
Carbapenem Resistant ◽  
Multidrug Resistant Organisms ◽  
Clinical Culture

Abstract Background Clinical culture results are sometimes used to estimate the burden of multidrug-resistant organisms (MDROs) in hospitals. The association between positive clinical culture results and prevalence of MDROs in the gut is incompletely understood. Methods Rectal swab or stool samples were collected daily from adult medical intensive care unit (MICU) patients and cultured for target MDROs using selective media between January 2017 and January 2018 at Rush University Medical Center, a 676-bed tertiary-care center in Chicago. Resistance mechanisms were confirmed by phenotypic methods and/or polymerase chain reaction. Clinical culture results during MICU stay were extracted from the hospital information system. Target MDROs included vancomycin-resistant Enterococci (VRE), carbapenem-resistant Enterobacteriaceae (CRE), extended-spectrum β-lactamase-producing Enterobacteriaceae (ESBL), carbapenem-resistant Pseudomonas aeruginosa (CRPA) and carbapenem-resistant Acinetobacter baumannii (CRAB). Patients with either a study or clinical culture positive for a target MDRO were analyzed. Results We collected 5,086 study samples from 1,661 unique admissions (1,419 patients) and included here data from 413 unique admissions (397 patients) with completed microbiologic analysis. Median (IQR) patient age was 65 (51–75) years and length of MICU stay was 3 (3–4) days. A total of 156 (37.8%) patients had a target MDRO detected from a study sample at any point; 57 (36.5%) patients had &gt;1 MDRO detected. Overall prevalence of these MDROs was found to be 22.5% VRE, 6.5% CRE, 19.8% ESBL, 4.4% CRPA, and 0.7% CRAB. New MDRO acquisition was observed in 58 (14.6%) patients (figure). Once a target MDRO was detected in a study sample, 82.2% of subsequent study samples were positive for that MDRO. Only 13 (5.8%) patients had a positive clinical culture for any target MDRO during their MICU stay (table). Conclusion Clinical cultures capture only the tip of the resistance iceberg and alone are insufficient to guide MDRO-targeted prevention strategies. Universal infection prevention measures are an alternative that may be preferred in settings where overall prevalence of MDROs is moderate or high and patients may be colonized with &gt;1 MDRO. Disclosures All authors: No reported disclosures.

Diabetic foot ulcer and multidrug-resistant organisms: risk factors and impact

2004 ◽  
Vol 21 (7) ◽  
pp. 710-715 ◽  
Author(s):  
A. Hartemann-Heurtier ◽  
J. Robert ◽  
S. Jacqueminet ◽  
G. Ha Van ◽  
J. L. Golmard ◽  
...  
Keyword(s):  
Risk Factors ◽  
Diabetic Foot ◽  
Foot Ulcer ◽  
Diabetic Foot Ulcer ◽  
Multidrug Resistant ◽  
Multidrug Resistant Organisms

scholarly journals Effect of changing urine testing orderables and clinician order sets on inpatient urine culture testing: Analysis from a large academic medical center

2019 ◽  
Vol 40 (3) ◽  
pp. 281-286 ◽  
Author(s):  
Satish Munigala ◽  
Rebecca Rojek ◽  
Helen Wood ◽  
Melanie L. Yarbrough ◽  
Ronald R. Jackups ◽  
...  
Keyword(s):  
Urine Culture ◽  
Medical Center ◽  
Academic Medical Center ◽  
Tertiary Care ◽  
Temporal Trends ◽  
Interrupted Time Series ◽  
Vital Role ◽  
Order Sets ◽  
Urine Testing ◽  
The Impact

AbstractObjective:To evaluate the impact of changes to urine testing orderables in computerized physician order entry (CPOE) system on urine culturing practices.Design:Retrospective before-and-after study.Setting:A 1,250-bed academic tertiary-care referral center.Patients:Hospitalized adults who had ≥1 urine culture performed during their stay.Intervention:The intervention (implemented in April 2017) consisted of notifications to providers, changes to order sets, and inclusion of the new urine culture reflex tests in commonly used order sets. We compared the urine culture rates before the intervention (January 2015 to April 2016) and after the intervention (May 2016 to August 2017), adjusting for temporal trends.Results:During the study period, 18,954 inpatients (median age, 62 years; 68.8% white and 52.3% female) had 24,569 urine cultures ordered. Overall, 6,662 urine cultures (27%) were positive. The urine culturing rate decreased significantly in the postintervention period for any specimen type (38.1 per 1,000 patient days preintervention vs 20.9 per 1,000 patient days postintervention; P < .001), clean catch (30.0 vs 18.7; P < .001) and catheterized urine (7.8 vs 1.9; P < .001). Using an interrupted time series model, urine culture rates decreased for all specimen types (P < .05).Conclusions:Our intervention of changes to order sets and inclusion of the new urine culture reflex tests resulted in a 45% reduction in the urine cultures ordered. CPOE system format plays a vital role in reducing the burden of unnecessary urine cultures and should be implemented in combination with other efforts.

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