scholarly journals 851. Validation of Quick Pitt Bacteremia Score in Patients with Staphylococcus aureus Bloodstream Infection

2019 ◽  
Vol 6 (Supplement_2) ◽  
pp. S17-S17
Author(s):  
Sarah Elizabeth. Battle ◽  
Julie Ann Justo ◽  
P Brandon Bookstaver ◽  
Joseph Kohn ◽  
Majdi Al-hasan
Keyword(s):  
Staphylococcus Aureus ◽  
South Carolina ◽  
Bloodstream Infection ◽  
Characteristic Curve ◽  
Severity Of Illness ◽  
Fold Increase ◽  
Microbiological Characteristics ◽  
Point Increase ◽  
High Discrimination ◽  
Mortality Table

Abstract Background A quick version of the Pitt Bacteremia Score (qPitt) was recently derived based on five binary variables each assigned one point (Table 1). The qPitt broadened respiratory failure definition, simplified mental status, and eliminated fever from the original Pitt bacteremia score. The qPitt had high discrimination in predicting mortality in patients with Gram-negative bloodstream infection (BSI) and outperformed other acute severity of illness scores. This retrospective cohort study aims to evaluate the qPitt performance in patients with Staphylococcus aureus BSI and compare its discrimination to quick Sepsis Related Organ Failure Assessment (qSOFA). Methods Hospitalized adult patients with S. aureus BSI at Prisma Health-Midlands hospitals in South Carolina from January 1, 2015 to December 31, 2017 were identified. Multivariate logistic regression was used to examine risk factors for 28-day all-cause mortality. The area under receiver operating characteristic curve (AUROC) was used to evaluate discrimination of qPitt and qSOFA in predicting 28-day mortality (primary outcome). In-hospital and 90-day mortality were examined as secondary outcomes. Results Among the 398 patients with S. aureus BSI, the median age was 63 years, 241 (61%) were men, 173 (43%) had methicillin-resistant S. aureus (MRSA) BSI, and 95 (24%) died within 28 days of BSI. After adjustments for age, clinical and microbiological characteristics in the multivariate model, all five individual components of qPitt were independently associated with 28-day mortality (Table 1). There was a 3-fold increase in 28-day mortality for each point increase in qPitt (odds ratio 3.11, 95% confidence intervals: 2.40–4.02, P < 0.001). Mortality was 2% in patients with qPitt of 0 and increased to 14%, 24%, 50%, and 82% in patients with qPitt of 1, 2, 3, and ≥4, respectively. The qPitt had higher discrimination in predicting 28-day mortality than qSOFA (AUROC 0.82 vs. 0.77, P = 0.001). The qPitt also performed well in predicting in-hospital and 90-day mortality (AUROC 0.80 and 0.76, respectively). Conclusion The qPitt has good discrimination in predicting mortality in patients with S. aureus BSI. These results support using the qPitt as an acute severity of illness score in future studies. Disclosures All Authors: No reported Disclosures.

scholarly journals 193. Evaluation of Severity Scores in Patients with Methicillin-Susceptible Staphylococcus aureus Bloodstream Infections

2021 ◽  
Vol 8 (Supplement_1) ◽  
pp. S204-S204
Author(s):  
Alexandra Craig ◽  
Jamie Wagner ◽  
Katie Barber
Keyword(s):  
Staphylococcus Aureus ◽  
Characteristic Curve ◽  
Recurrent Infection ◽  
Severity Of Illness ◽  
Bloodstream Infections ◽  
Clinical Failure ◽  
Gram Negative ◽  
Exact Test ◽  
Severity Scores ◽  
Definitive Therapy

Abstract Background Staphylococcus aureus bloodstream infections (BSIs) are associated with increased morbidity, mortality, and healthcare costs. Severity of illness scores help stratify critically ill patients and assist providers in making decisions. The quick Pitt (qPitt) score is a reliable predictor of mortality in patients with Gram-negative BSIs (AUROC 0.85); however, limited data exist for using the qPitt in methicillin-susceptible S. aureus (MSSA) BSIs. Methods This retrospective cohort evaluated patients with MSSA BSIs. The primary outcome was the discrimination of the qPitt in predicting hospital mortality compared to the Pitt bacteremia score (PBS). Secondary outcomes were clinical failure and the predictive discrimination of the qPitt score in comparison to other severity scoring modalities. Categorical data were analyzed using chi-square test or Fisher’s exact test. Continuous data were analyzed using Student’s t-test or Mann-Whitney U. Predictive discrimination was determined by the area under receiver operating characteristic curve. Results One hundred patients were included with the mean age of 52 years (p=0.84) and a BMI of 30 kg/m2. Males were predominant (70%). Mortality occurred in 13 patients who had more ICU admissions (92% vs. 37%; p&lt; 0.01) and longer ICU LOS (10 vs. 5 days; p=0.03) despite similar baseline comorbidities. Time to definitive therapy was longer in the mortality group than non-mortality group (28 vs. 23 hours; p=0.79) though antimicrobial use did not differ. As outlined in Figure 1, the mortality group had higher severity of illness scores. The qPitt had a ROC of 0.83, indicating high discrimination. Overall, qPitt was found to be similarly predictive than PBS, equally as predictive as qSOFA, and more predictive than SIRS and APACHE II (Figure 1). Clinical failure occurred in 23% of patients; 54% of the mortality group experienced persistent BSI vs. 11% in the non-mortality group (p&lt; 0.01), and 3% of the non-mortality group had recurrent infection (p=1.00). Conclusion Compared to previous studies on Gram-negative BSIs, the qPitt performed similarly in MSSA BSIs. The qPitt can be considered for use in predicting mortality for patients with MSSA BSIs; however, further studies are needed to confirm these results. Disclosures All Authors: No reported disclosures

Clinical Risk Score for Prediction of Extended-Spectrum β-Lactamase–Producing Enterobacteriaceae in Bloodstream Isolates

2016 ◽  
Vol 38 (3) ◽  
pp. 266-272 ◽  
Author(s):  
Matthew R. Augustine ◽  
Traci L. Testerman ◽  
Julie Ann Justo ◽  
P. Brandon Bookstaver ◽  
Joseph Kohn ◽  
...  
Keyword(s):  
Risk Factors ◽  
Risk Score ◽  
Characteristic Curve ◽  
Severity Of Illness ◽  
Bloodstream Infections ◽  
Patient Specific ◽  
Retrospective Case ◽  
Extended Spectrum ◽  
High Discrimination ◽  
Independent Risk Factors

OBJECTIVETo develop a risk score to predict probability of bloodstream infections (BSIs) due to extended-spectrum β-lactamase–producing Enterobacteriaceae (ESBLE).DESIGNRetrospective case-control study.SETTINGTwo large community hospitals.PATIENTSHospitalized adults with Enterobacteriaceae BSI between January 1, 2010, and June 30, 2015.METHODSMultivariate logistic regression was used to identify independent risk factors for ESBLE BSI. Point allocation in extended-spectrum β-lactamase prediction score (ESBL-PS) was based on regression coefficients.RESULTSAmong 910 patients with Enterobacteriaceae BSI, 42 (4.6%) had ESBLE bloodstream isolates. Most ESBLE BSIs were community onset (33 of 42; 79%), and 25 (60%) were due to Escherichia coli. Independent risk factors for ESBLE BSI and point allocation in ESBL-PS included outpatient procedures within 1 month (adjusted odds ratio [aOR], 8.7; 95% confidence interval [CI], 3.1–22.9; 1 point), prior infections or colonization with ESBLE within 12 months (aOR, 26.8; 95% CI, 7.0–108.2; 4 points), and number of prior courses of β-lactams and/or fluoroquinolones used within 3 months of BSI: 1 course (aOR, 6.3; 95% CI, 2.7–14.7; 1 point), ≥2 courses (aOR, 22.0; 95% CI, 8.6–57.1; 3 points). The area under the receiver operating characteristic curve for the ESBL-PS model was 0.86. Patients with ESBL-PSs of 0, 1, 3, and 4 had estimated probabilities of ESBLE BSI of 0.7%, 5%, 24%, and 44%, respectively. Using ESBL-PS ≥3 to indicate high risk provided a negative predictive value of 97%.CONCLUSIONSESBL-PS estimated patient-specific risk of ESBLE BSI with high discrimination. Incorporation of ESBL-PS with acute severity of illness may improve adequacy of empirical antimicrobial therapy and reduce carbapenem utilization.Infect Control Hosp Epidemiol 2017;38:266–272

Impact of immunosuppressive agents on clinical manifestations and outcome of Staphylococcus aureus bloodstream infection – A propensity score matched analysis in two large, prospectively evaluated cohorts

2021 ◽  
Author(s):  
Johannes Camp ◽  
Lina Glaubitz ◽  
Tim Filla ◽  
Achim J Kaasch ◽  
Frieder Fuchs ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Propensity Score ◽  
Bloodstream Infection ◽  
Cox Regression ◽  
Immunosuppressive Agents ◽  
Late Complications ◽  
Competing Risk ◽  
Immunosuppressed Patients ◽  
Staphylococcus Aureus Bloodstream Infection ◽  
Baseline Characteristics

Abstract Background Staphylococcus aureus bloodstream infection (SAB) is a common, life-threatening infection. The impact of immunosuppressive agents on the outcome of patients with SAB is incompletely understood. Methods Data from two large prospective, international, multicenter cohort studies (INSTINCT and ISAC) between 2006 and 2015 were analyzed. Patients receiving immunosuppressive agents were identified and a 1:1 propensity score (PS) matched analysis was performed to adjust for baseline characteristics of patients. Overall survival and time to SAB-related late complications (SAB relapse, infective endocarditis, osteomyelitis, or other deep-seated manifestations) were analyzed by Cox regression and competing risk analyses, respectively. This approach was then repeated for specific immunosuppressive agents (corticosteroids [CSMT] and immunosuppressive agents other than steroids [IMOTS]). Results Of 3,188 analyzed patients, 309 were receiving immunosuppressive treatment according to our definitions and were matched to 309 non-immunosuppressed patients. After PS matching, baseline characteristics were well balanced. In the Cox regression analysis, we observed no significant difference in survival between the two groups (death during follow-up: 105/309 (33.9 %) immunosuppressed patients vs. 94/309 (30.4 %) non-immunosuppressed, hazard ratio 1.20 (95% CI 0.84–1.71). Competing risk analysis showed a cause-specific hazard ratio (CSHR) of 1.81 (95% CI 0.85–3.87) for SAB-related late-complications in patients receiving immunosuppressive agents. CSHR was higher in patients taking IMOTS (3.69; 95% CI 1.41–9.68). Conclusions Immunosuppressive agents were not associated with an overall higher mortality. The risk for SAB-related late complications in patients receiving specific immunosuppressive agents such as IMOTs warrants further investigations.

Genomic Epidemiology of Invasive Methicillin-Resistant Staphylococcus aureus Infections Among Hospitalized Individuals in Ontario, Canada

2020 ◽  
Vol 222 (12) ◽  
pp. 2071-2081 ◽  
Author(s):  
Jennifer L Guthrie ◽  
Sarah Teatero ◽  
Sotaro Hirai ◽  
Alex Fortuna ◽  
Daniel Rosen ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Methicillin Resistant Staphylococcus Aureus ◽  
Demographic Data ◽  
Public Health Practice ◽  
Acid Resistance ◽  
Fold Increase ◽  
High Genetic Diversity ◽  
Methicillin Resistant ◽  
Genomic Epidemiology ◽  
Healthcare Settings

Abstract Background Prevention and control of methicillin-resistant Staphylococcus aureus (MRSA) infections remain challenging. In-depth surveillance integrating patient and isolate data can provide evidence to better inform infection control and public health practice. Methods We analyzed MRSA cases diagnosed in 2010 (n = 212) and 2016 (n = 214) by hospitals in Ontario, Canada. Case-level clinical and demographic data were integrated with isolate characteristics, including antimicrobial resistance (AMR), classic genotyping, and whole-genome sequencing results. Results Community-associated MRSA (epidemiologically defined) increased significantly from 23.6% in 2010 to 43.0% in 2016 (P &lt; .001). The MRSA population structure changed over time, with a 1.5× increase in clonal complex (CC)8 strains and a concomitant decrease in CC5. The clonal shift was reflected in AMR patterns, with a decrease in erythromycin (86.7% to 78.4%, P = .036) and clindamycin resistance (84.3% to 47.9%, P &lt; .001) and a &gt;2-fold increase in fusidic acid resistance (9.0% to 22.5%, P &lt; .001). Isolates within both CC5 and CC8 were relatively genetically diverse. We identified 6 small genomic clusters—3 potentially related to transmission in healthcare settings. Conclusions Community-associated MRSA is increasing among hospitalized individuals in Ontario. Clonal shifting from CC5 to CC8 has impacted AMR. We identified a relatively high genetic diversity and limited genomic clustering within these dominant CCs.

scholarly journals Prediction of Failure in Vancomycin-Treated Methicillin-Resistant Staphylococcus aureus Bloodstream Infection: a Clinically Useful Risk Stratification Tool

2011 ◽  
Vol 55 (10) ◽  
pp. 4581-4588 ◽  
Author(s):  
Carol L. Moore ◽  
Mei Lu ◽  
Faiqa Cheema ◽  
Paola Osaki-Kiyan ◽  
Mary Beth Perri ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Risk Stratification ◽  
Bloodstream Infection ◽  
Apache Ii ◽  
Risk Level ◽  
Apache Ii Score ◽  
City Hospital ◽  
Clinical Failure ◽  
Methicillin Resistant ◽  
Risk Stratification Tool

ABSTRACTMethicillin-resistantStaphylococcus aureus(MRSA) is a common cause of bloodstream infection (BSI) and is often associated with invasive infections and high rates of mortality. Vancomycin has remained the mainstay of therapy for serious Gram-positive infections, particularly MRSA BSI; however, therapeutic failures with vancomycin have been increasingly reported. We conducted a comprehensive evaluation of the factors (patient, strain, infection, and treatment) involved in the etiology and management of MRSA BSI to create a risk stratification tool for clinicians. This study included consecutive patients with MRSA BSI treated with vancomycin over 2 years in an inner-city hospital in Detroit, MI. Classification and regression tree analysis (CART) was used to develop a risk prediction model that characterized vancomycin-treated patients at high risk of clinical failure. Of all factors, the Acute Physiology and Chronic Health Evaluation II (APACHE-II) score, with a cutoff point of 14, was found to be the strongest predictor of failure and was used to split the population into two groups. Forty-seven percent of the population had an APACHE-II score < 14, a value that was associated with low rates of clinical failure (11%) and mortality (4%). Fifty-four percent of the population had an APACHE-II score ≥ 14, which was associated with high rates of clinical failure (35%) and mortality (23%). The risk stratification model identified the interplay of three other predictors of failure, including the vancomycin MIC as determined by Vitek 2 analysis, the risk level of the source of BSI, and the USA300 strain type. This model can be a useful tool for clinicians to predict the likelihood of success or failure in vancomycin-treated patients with MRSA bloodstream infection.

Diagnostic Value of CD4/CD8 in Scrub Typhus

2021 ◽  
Author(s):  
Kangkang Hong ◽  
Ziping Shu ◽  
Laodong Li ◽  
Yu Zhong ◽  
Weiqian Chen ◽  
...  
Keyword(s):  
Hiv Infection ◽  
Bloodstream Infection ◽  
Operating Characteristic ◽  
Scrub Typhus ◽  
Characteristic Curve ◽  
Community Acquired Pneumonia ◽  
Curve Analysis ◽  
Control Groups ◽  
Infection Group ◽  
Operating Characteristic Curve

Scrub typhus is often misdiagnosed in febrile patients, leading to antibiotic abuse and multiple complications. We conducted a retrospective record review at the Fourth Affiliated Hospital of Guangxi Medical University in China. Data were collected on 52 patients with a confirmed diagnosis of scrub typhus and complete clinical data. In addition, data were collected on 52 patients with bloodstream infection, 25 patients with HIV infection, 112 patients with common community-acquired pneumonia (CCAP), and 36 patients with severe community-acquired pneumonia (SCAP) to serve as control groups. The peripheral blood CD4 and CD8 counts, CD4/CD8 ratio, C-reactive protein, procalcitonin, alanine aminotransferase, aspartate aminotransferase, creatinine, and β2 microglobulin levels; and the white blood cell count and neutrophil percentage were compared between the scrub typhus and the control groups. The value of these biomarkers in the diagnosis of scrub typhus was assessed using receiver–operating characteristic curve analysis. The scrub typhus group had a significantly lower CD4 count and CD4/CD8 ratio than the bloodstream infection, CCAP, and SCAP groups, and a significantly greater CD4 count and CD4/CD8 ratio than the HIV infection group. In contrast, the scrub typhus group had a significantly greater CD8 count than the bloodstream infection and CCAP and SCAP groups, and it had a lower level of CD8 than the HIV infection group. The areas under the curve of CD4/CD8 were more than 0.93 in the receiver–operating characteristic curve analysis. These findings suggest that the CD4/CD8 ratio is a useful ancillary test for diagnosing scrub typhus.

scholarly journals Methicillin-resistant Staphylococcus aureus bloodstream infection: risk factors and clinical outcome in non-intensive-care units

2012 ◽  
Vol 45 (2) ◽  
pp. 189-193 ◽  
Author(s):  
Karinne Spirandelli Carvalho Naves ◽  
Natália Vaz da Trindade ◽  
Paulo Pinto Gontijo Filho
Keyword(s):  
Risk Factors ◽  
Staphylococcus Aureus ◽  
Bloodstream Infection ◽  
Antimicrobial Agents ◽  
Methicillin Resistant Staphylococcus Aureus ◽  
Methicillin Resistance ◽  
Diffusion Method ◽  
Disk Diffusion Method ◽  
Methicillin Resistant ◽  
Staphylococcus Aureus Bloodstream Infection

INTRODUCTION: Methicillin-resistant Staphylococcus aureus (MRSA) is spread out in hospitals across different regions of the world and is regarded as the major agent of nosocomial infections, causing infections such as skin and soft tissue pneumonia and sepsis. The aim of this study was to identify risk factors for methicillin-resistance in Staphylococcus aureus bloodstream infection (BSI) and the predictive factors for death. METHODS: A retrospective cohort of fifty-one patients presenting bacteraemia due to S. aureus between September 2006 and September 2008 was analysed. Staphylococcu aureus samples were obtained from blood cultures performed by clinical hospital microbiology laboratory from the Uberlândia Federal University. Methicillinresistance was determined by growth on oxacillin screen agar and antimicrobial susceptibility by means of the disk diffusion method. RESULTS: We found similar numbers of MRSA (56.8%) and methicillin-susceptible Staphylococcus aureus (MSSA) (43.2%) infections, and the overall hospital mortality ratio was 47%, predominantly in MRSA group (70.8% vs. 29.2%) (p=0.05). Age (p=0.02) was significantly higher in MRSA patients as also was the use of central venous catheter (p=0.02). The use of two or more antimicrobial agents (p=0.03) and the length of hospital stay prior to bacteraemia superior to seven days (p=0.006) were associated with mortality. High odds ratio value was observed in cardiopathy as comorbidity. CONCLUSIONS: Despite several risk factors associated with MRSA and MSSA infection, the use of two or more antimicrobial agents was the unique independent variable associated with mortality.

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