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Hills AZ, Ray M, Williams J, Greenslade J. Benchmarking blood culture quality in the emergency department: Contamination, single sets and positivity. Emerg Med Australas 2024; 36:206-212. [PMID: 37845807 DOI: 10.1111/1742-6723.14330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 09/22/2023] [Accepted: 09/27/2023] [Indexed: 10/18/2023]
Abstract
OBJECTIVE To benchmark blood culture (BC) quality in an Australian ED, explore groups at risk of suboptimal BC collection, and identify potential areas for improvement. METHODS This retrospective observational study was undertaken to benchmark quality of BCs in a tertiary adult ED in terms of number of BC sets per patient and proportion of patients with false positive (contaminated) BC results. RESULTS A single BC set was taken for 55% of patients, with lower acuity patients being more likely to have a single BC set taken. BC false positives occurred in 3.4% of presentations, with higher frequency in some critically unwell patient groups. The true positive BC rate was 10.9%, with pathogens most frequently isolated in older patients, those with a haematological condition or genitourinary source, and those admitted to inpatient wards. Hospital length of stay did not differ between patients with negative and patients with false positive BCs. CONCLUSIONS BC quality standards in the ED such as false positive rate <3% and single culture rate <20% are required to facilitate benchmarking and prospective quality improvement. The sensitivity and specificity of this common and critical test can be improved. Patient subgroups associated with poor-quality BC collection can be identified and should be a focus of future work.
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Affiliation(s)
- Angela Z Hills
- Emergency and Trauma Centre, Royal Brisbane and Women's Hospital, Brisbane, Queensland, Australia
| | - Mercedes Ray
- Emergency and Trauma Centre, Royal Brisbane and Women's Hospital, Brisbane, Queensland, Australia
| | - Julian Williams
- Emergency and Trauma Centre, Royal Brisbane and Women's Hospital, Brisbane, Queensland, Australia
- Faculty of Medicine, The University of Queensland, Brisbane, Queensland, Australia
| | - Jaimi Greenslade
- Emergency and Trauma Centre, Royal Brisbane and Women's Hospital, Brisbane, Queensland, Australia
- Australian Centre for Health Services Innovation, Centre for Healthcare Transformation, Faculty of Health, Queensland University of Technology, Brisbane, Queensland, Australia
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2
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Iyer V, Castro D, Malla B, Panda B, Rabson AR, Horowitz G, Heger N, Gupta K, Singer A, Norwitz ER. Culture-independent identification of bloodstream infections from whole blood: prospective evaluation in specimens of known infection status. J Clin Microbiol 2024; 62:e0149823. [PMID: 38315022 PMCID: PMC10935643 DOI: 10.1128/jcm.01498-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Accepted: 12/19/2023] [Indexed: 02/07/2024] Open
Abstract
Sepsis caused by bloodstream infection (BSI) is a major healthcare burden and a leading cause of morbidity and mortality worldwide. Timely diagnosis is critical to optimize clinical outcome, as mortality rates rise every hour treatment is delayed. Blood culture remains the "gold standard" for diagnosis but is limited by its long turnaround time (1-7 days depending on the organism) and its potential to provide false-negative results due to interference by antimicrobial therapy or the presence of mixed (i.e., polymicrobial) infections. In this paper, we evaluated the performance of resistance and pathogen ID/BSI, a direct-from-specimen molecular assay. To reduce the false-positivity rate common with molecular methods, this assay isolates and detects genomic material only from viable microorganisms in the blood by incorporating a novel precursor step to selectively lyse host and non-viable microbial cells and remove cell-free genomic material prior to lysis and analysis of microbial cells. Here, we demonstrate that the assay is free of interference from host immune cells and common antimicrobial agents at elevated concentrations. We also demonstrate the accuracy of this technology in a prospective cohort pilot study of individuals with known sepsis/BSI status, including samples from both positive and negative individuals. IMPORTANCE Blood culture remains the "gold standard" for the diagnosis of sepsis/bloodstream infection (BSI) but has many limitations which may lead to a delay in appropriate and accurate treatment in patients. Molecular diagnostic methods have the potential for markedly improving the management of such patients through faster turnaround times and increased accuracy. But molecular diagnostic methods have not been widely adopted for the identification of BSIs. By incorporating a precursor step of selective lysis of host and non-viable microorganisms, our resistance and pathogen ID (RaPID)/BSI molecular assay addresses many limitations of blood culture and other molecular assay. The RaPID/BSI assay has an approximate turnaround time of 4 hours, thereby significantly reducing the time to appropriate and accurate diagnosis of causative microorganisms in such patients. The short turnaround time also allows for close to real-time tracking of pathogenic clearance of microorganisms from the blood of these patients or if a change of antimicrobial regimen is required. Thus, the RaPID/BSI molecular assay helps with optimization of antimicrobial stewardship; prompt and accurate diagnosis of sepsis/BSI could help target timely treatment and reduce mortality and morbidity in such patients.
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Affiliation(s)
- Vidya Iyer
- Department of Obstetrics and Gynecology, Tufts Medical Center, Boston, Massachusetts, USA
- Department of Obstetrics and Gynecology, Tufts University School of Medicine, Boston, Massachusetts, USA
- Division of Clinical Research, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Daniel Castro
- Department of Obstetrics and Gynecology, Tufts Medical Center, Boston, Massachusetts, USA
| | - Bipin Malla
- Department of Obstetrics and Gynecology, Tufts Medical Center, Boston, Massachusetts, USA
| | - Britta Panda
- Department of Obstetrics and Gynecology, Tufts Medical Center, Boston, Massachusetts, USA
| | - Arthur R. Rabson
- Department of Pathology and Laboratory Medicine, Tufts Medical Center, Boston, Massachusetts, USA
| | - Gary Horowitz
- Department of Pathology and Laboratory Medicine, Tufts Medical Center, Boston, Massachusetts, USA
| | - Nicholas Heger
- Department of Pathology and Laboratory Medicine, Tufts Medical Center, Boston, Massachusetts, USA
| | | | - Alon Singer
- HelixBind Inc., Boxborough, Massachusetts, USA
| | - Errol R. Norwitz
- Department of Obstetrics and Gynecology, Tufts Medical Center, Boston, Massachusetts, USA
- Department of Obstetrics and Gynecology, Tufts University School of Medicine, Boston, Massachusetts, USA
- Division of Clinical Research, Massachusetts General Hospital, Boston, Massachusetts, USA
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Suntornsut P, Asadinia KS, Limato R, Tamara A, Rotty LWA, Bramanti R, Nusantara DU, Nelwan EJ, Khusuwan S, Suphamongkholchaikul W, Chamnan P, Piyaphanee W, Vu HTL, Nguyen YH, Nguyen KH, Pham TN, Le QM, Vu VH, Chau DM, Vo DETH, Harriss EK, van Doorn HR, Hamers RL, Lorencatto F, Atkins L, Limmathurotsakul D. Barriers and enablers to blood culture sampling in Indonesia, Thailand and Viet Nam: a Theoretical Domains Framework-based survey. BMJ Open 2024; 14:e075526. [PMID: 38373855 PMCID: PMC10882306 DOI: 10.1136/bmjopen-2023-075526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/21/2024] Open
Abstract
OBJECTIVE Blood culture (BC) sampling is recommended for all suspected sepsis patients prior to antibiotic administration. We examine barriers and enablers to BC sampling in three Southeast Asian countries. DESIGN A Theoretical Domains Framework (TDF)-based survey, comprising a case scenario of a patient presenting with community-acquired sepsis and all 14 TDF domains of barriers/enablers to BC sampling. SETTING Hospitals in Indonesia, Thailand and Viet Nam, December 2021 to 30 April 2022. PARTICIPANTS 1070 medical doctors and 238 final-year medical students were participated in this study. Half of the respondents were women (n=680, 52%) and most worked in governmental hospitals (n=980, 75.4%). OUTCOME MEASURES Barriers and enablers to BC sampling. RESULTS The proportion of respondents who answered that they would definitely take BC in the case scenario was highest at 89.8% (273/304) in Thailand, followed by 50.5% (252/499) in Viet Nam and 31.3% (157/501) in Indonesia (p<0.001). Barriers/enablers in nine TDF domains were considered key in influencing BC sampling, including 'priority of BC (TDF-goals)', 'perception about their role to order or initiate an order for BC (TDF-social professional role and identity)', 'perception that BC is helpful (TDF-beliefs about consequences)', 'intention to follow guidelines (TDF-intention)', 'awareness of guidelines (TDF-knowledge)', 'norms of BC sampling (TDF-social influence)', 'consequences that discourage BC sampling (TDF-reinforcement)', 'perceived cost-effectiveness of BC (TDF-environmental context and resources)' and 'regulation on cost reimbursement (TDF-behavioural regulation)'. There was substantial heterogeneity between the countries. In most domains, the lower (higher) proportion of Thai respondents experienced the barriers (enablers) compared with that of Indonesian and Vietnamese respondents. A range of suggested intervention types and policy options was identified. CONCLUSIONS Barriers and enablers to BC sampling are varied and heterogenous. Cost-related barriers are more common in more resource-limited countries, while many barriers are not directly related to cost. Context-specific multifaceted interventions at both hospital and policy levels are required to improve diagnostic stewardship practices.
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Affiliation(s)
- Pornpan Suntornsut
- Mahidol Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Koe Stella Asadinia
- Oxford University Clinical Research Unit Indonesia, Faculty of Medicine, Universitas Indonesia, Jakarta, Indonesia
| | - Ralalicia Limato
- Oxford University Clinical Research Unit Indonesia, Faculty of Medicine, Universitas Indonesia, Jakarta, Indonesia
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, Oxford University, Oxford, UK
| | - Alice Tamara
- Oxford University Clinical Research Unit Indonesia, Faculty of Medicine, Universitas Indonesia, Jakarta, Indonesia
| | | | | | | | - Erni J Nelwan
- Faculty of Medicine, Universitas Indonesia, Jakarta, Indonesia
- Department of Internal Medicine, Cipto Mangunkusumo National General Hospital, Jakarta, Indonesia
| | | | | | | | - Watcharapong Piyaphanee
- Hospital for Tropical Diseases, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | | | - Yen Hai Nguyen
- Oxford University Clinical Research Unit, Ha Noi, Viet Nam
| | | | | | | | | | | | | | - Elinor K Harriss
- Bodleian Health Care Libraries, University of Oxford, Oxford, UK
| | - Hindrik Rogier van Doorn
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, Oxford University, Oxford, UK
- Oxford University Clinical Research Unit, Ha Noi, Viet Nam
| | - Raph Leonardus Hamers
- Oxford University Clinical Research Unit Indonesia, Faculty of Medicine, Universitas Indonesia, Jakarta, Indonesia
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, Oxford University, Oxford, UK
| | | | - Lou Atkins
- Centre for Behaviour Change, University College London, London, UK
| | - Direk Limmathurotsakul
- Mahidol Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, Oxford University, Oxford, UK
- Department of Tropical Hygiene, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
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Williams J, Hills A, Ray M, Greenslade J. Changing culture: An intervention to improve blood culture quality in the emergency department. Emerg Med Australas 2024; 36:133-139. [PMID: 37899725 DOI: 10.1111/1742-6723.14329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Revised: 08/25/2023] [Accepted: 09/21/2023] [Indexed: 10/31/2023]
Abstract
OBJECTIVE Blood cultures (BCs) remain a key investigation in ED patients at risk of bacteraemia. The aim of this study was to assess the effect of a multi-modal, nursing-led intervention to improve the quality of BCs in the ED, in terms of single culture, underfilling and contamination rates. METHOD The present study was conducted in the ED of a large urban tertiary referral hospital. The study included four phases: pre-intervention, intervention, post-intervention and sustainability periods. A multi-modal intervention to improve BC quality consisting small group education, posters, brief educational videos, social media presence, quality feedback, small group/individual mentoring and availability of BC collection kits was designed and delivered by two senior ED nurses over 7 weeks. Study data comprised rates of single, underfilled and contaminated cultures in each of three 18-week periods: pre-intervention (baseline), post-intervention and sustainability. RESULTS Over the study period 4908 BC sets were collected during 2347 episodes of care in the ED. Single culture sets reduced from 56.2% in the pre-intervention period to 22.8% post-intervention (P < 0.01) and 18.8% in the sustainability period (P < 0.01). Underfilled bottle rates were also significantly reduced (aerobic 52.8% pre-intervention to 19.2% post-intervention, 18.8% sustainability, anaerobic 46.8% pre-intervention to 23.3% post-intervention, 23.8% sustainability). Skin contaminants were grown from 3.7% of BC sets in the pre-intervention period, improving to 1.5% in the post-intervention period (P < 0.001) and 2.1% in the sustainability period (P = 0.03). Total volume of blood cultured was significantly associated with diagnosis of bacteraemia. CONCLUSION Significant improvements in BC quality are possible with nursing-based interventions in the ED.
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Affiliation(s)
- Julian Williams
- Emergency and Trauma Centre, Royal Brisbane and Women's Hospital, Brisbane, Queensland, Australia
- Faculty of Medicine and Biomedical Sciences, The University of Queensland, Brisbane, Queensland, Australia
| | - Angela Hills
- Emergency and Trauma Centre, Royal Brisbane and Women's Hospital, Brisbane, Queensland, Australia
| | - Mercedes Ray
- Emergency and Trauma Centre, Royal Brisbane and Women's Hospital, Brisbane, Queensland, Australia
| | - Jaimi Greenslade
- Emergency and Trauma Centre, Royal Brisbane and Women's Hospital, Brisbane, Queensland, Australia
- School of Public Health and Social Work, Queensland University of Technology, Brisbane, Queensland, Australia
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Evaluation of hospital blood culture utilization rates to identify opportunities for diagnostic stewardship. Infect Control Hosp Epidemiol 2023; 44:200-205. [PMID: 35938213 DOI: 10.1017/ice.2022.191] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVES To evaluate the pattern of blood-culture utilization among a cohort of 6 hospitals to identify potential opportunities for diagnostic stewardship. METHODS We completed a retrospective analysis of blood-culture utilization during adult inpatient or emergency department (ED) encounters in 6 hospitals from May 2019 to April 2020. We investigated 2 measures of blood-culture utilization rates (BCURs): the total number of blood cultures, defined as a unique accession number per 1,000 patient days (BCX) and a new metric of blood-culture events per 1,000 patient days to account for paired culture practices. We defined a blood-culture event as an initial blood culture and all subsequent samples for culture drawn within 12 hours for patients with an inpatient or ED encounter. Cultures were evaluated by unit type, positivity and contamination rates, and other markers evaluating the quality of blood-culture collection. RESULTS In total, 111,520 blood cultures, 52,550 blood culture events, 165,456 inpatient admissions, and 568,928 patient days were analyzed. Overall, the mean BCUR was 196 blood cultures per 1,000 patient days, with 92 blood culture events per 1,000 patient days (range, 64-155 among hospitals). Furthermore, 7% of blood-culture events were single culture events, 55% began in the ED, and 77% occurred in the first 3 hospital days. Among all blood cultures, 7.7% grew a likely pathogen, 2.1% were contaminated, and 5.9% of first blood cultures were collected after the initiation of antibiotics. CONCLUSIONS Blood-culture utilization varied by hospital and was heavily influenced by ED culture volumes. Hospital comparisons of blood-culture metrics can assist in identifying opportunities to optimize blood-culture collection practices.
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Garcia R, Barnes S, Boukidjian R, Goss LK, Spencer M, Septimus EJ, Wright MO, Munro S, Reese SM, Fakih MG, Edmiston CE, Levesque M. Recommendations for change in infection prevention programs and practice. Am J Infect Control 2022; 50:1281-1295. [PMID: 35525498 PMCID: PMC9065600 DOI: 10.1016/j.ajic.2022.04.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 04/18/2022] [Accepted: 04/19/2022] [Indexed: 01/25/2023]
Abstract
Fifty years of evolution in infection prevention and control programs have involved significant accomplishments related to clinical practices, methodologies, and technology. However, regulatory mandates, and resource and research limitations, coupled with emerging infection threats such as the COVID-19 pandemic, present considerable challenges for infection preventionists. This article provides guidance and recommendations in 14 key areas. These interventions should be considered for implementation by United States health care facilities in the near future.
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Affiliation(s)
- Robert Garcia
- Department of Healthcare Epidemiology, State University of New York at Stony Brook, Stony Brook, NY.
| | - Sue Barnes
- Infection Preventionist (Retired), San Mateo, CA
| | | | - Linda Kaye Goss
- Department of Infection Prevention, The Queen's Health System, Honolulu, HI
| | | | - Edward J Septimus
- Department of Population Medicine, Harvard Medical School, Boston, MA
| | | | - Shannon Munro
- Department of Veterans Affairs Medical Center, Research and Development, Salem, VA
| | - Sara M Reese
- Quality and Patient Safety Department, SCL Health System Broomfield, CO
| | - Mohamad G Fakih
- Clinical & Network Services, Ascension Healthcare and Wayne State University School of Medicine, Grosse Pointe Woods, MI
| | | | - Martin Levesque
- System Infection Prevention and Control, Henry Ford Health, Detroit, MI
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Sinto R, Lie KC, Setiati S, Suwarto S, Nelwan EJ, Djumaryo DH, Karyanti MR, Prayitno A, Sumariyono S, Moore CE, Hamers RL, Day NPJ, Limmathurotsakul D. Blood culture utilization and epidemiology of antimicrobial-resistant bloodstream infections before and during the COVID-19 pandemic in the Indonesian national referral hospital. Antimicrob Resist Infect Control 2022; 11:73. [PMID: 35590391 PMCID: PMC9117993 DOI: 10.1186/s13756-022-01114-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2022] [Accepted: 05/11/2022] [Indexed: 11/29/2022] Open
Abstract
Background There is a paucity of data regarding blood culture utilization and antimicrobial-resistant (AMR) infections in low and middle-income countries (LMICs). In addition, there has been a concern for increasing AMR infections among COVID-19 cases in LMICs. Here, we investigated epidemiology of AMR bloodstream infections (BSI) before and during the COVID-19 pandemic in the Indonesian national referral hospital. Methods We evaluated blood culture utilization rate, and proportion and incidence rate of AMR-BSI caused by WHO-defined priority bacteria using routine hospital databases from 2019 to 2020. A patient was classified as a COVID-19 case if their SARS-CoV-2 RT-PCR result was positive. The proportion of resistance was defined as the ratio of the number of patients having a positive blood culture for a WHO global priority resistant pathogen per the total number of patients having a positive blood culture for the given pathogen. Poisson regression models were used to assess changes in rate over time. Results Of 60,228 in-hospital patients, 8,175 had at least one blood culture taken (total 17,819 blood cultures), giving a blood culture utilization rate of 30.6 per 1,000 patient-days. A total of 1,311 patients were COVID-19 cases. Blood culture utilization rate had been increasing before and during the COVID-19 pandemic (both p < 0.001), and was higher among COVID-19 cases than non-COVID-19 cases (43.5 vs. 30.2 per 1,000 patient-days, p < 0.001). The most common pathogens identified were K. pneumoniae (23.3%), Acinetobacter spp. (13.9%) and E. coli (13.1%). The proportion of resistance for each bacterial pathogen was similar between COVID-19 and non-COVID-19 cases (all p > 0.10). Incidence rate of hospital-origin AMR-BSI increased from 130.1 cases per 100,000 patient-days in 2019 to 165.5 in 2020 (incidence rate ratio 1.016 per month, 95%CI:1.016–1.017, p < 0.001), and was not associated with COVID-19 (p = 0.96). Conclusions In our setting, AMR-BSI incidence and etiology were similar between COVID-19 and non-COVID-19 cases. Incidence rates of hospital-origin AMR-BSI increased in 2020, which was likely due to increased blood culture utilization. We recommend increasing blood culture utilization and generating AMR surveillance reports in LMICs to inform local health care providers and policy makers. Supplementary Information The online version contains supplementary material available at 10.1186/s13756-022-01114-x.
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Foong KS, Munigala S, Kern-Allely S, Warren DK. Blood culture utilization practices among febrile and/or hypothermic inpatients. BMC Infect Dis 2022; 22:779. [PMID: 36217111 PMCID: PMC9552399 DOI: 10.1186/s12879-022-07748-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Accepted: 09/23/2022] [Indexed: 12/04/2022] Open
Abstract
Background Predictors associated with the decision of blood culture ordering among hospitalized patients with abnormal body temperature are still underexplored, particularly non-clinical factors. In this study, we evaluated the factors affecting blood culture ordering in febrile and hypothermic inpatients. Methods We performed a retrospective study of 15,788 adult inpatients with fever (≥ 38.3℃) or hypothermia (< 36.0℃) from January 2016 to December 2017. We evaluated the proportion of febrile and hypothermic episodes with an associated blood culture performed within 24h. Generalized Estimating Equations were used to determine independent predictors associated with blood culture ordering among febrile and hypothermic inpatients. Results We identified 21,383 abnormal body temperature episodes among 15,788 inpatients (13,093 febrile and 8,290 hypothermic episodes). Blood cultures were performed in 36.7% (7,850/ 21,383) of these episodes. Predictors for blood culture ordering among inpatients with abnormal body temperature included fever ≥ 39℃ (adjusted odd ratio [aOR] 4.17, 95% confident interval [CI] 3.91–4.46), fever (aOR 3.48, 95% CI 3.27–3.69), presence of a central venous catheter (aOR 1.36, 95% CI 1.30–1.43), systemic inflammatory response (SIRS) plus hypotension (aOR 1.33, 95% CI 1.26–1.40), SIRS (aOR 1.26, 95% CI 1.20–1.31), admission to stem cell transplant / medical oncology services (aOR 1.09, 95% CI 1.04–1.14), and detection of abnormal body temperature during night shift (aOR 1.06, 95% CI 1.03–1.09) or on the weekend (aOR 1.05, 95% CI 1.01–1.08). Conclusion Blood culture ordering for hospitalized patients with fever or hypothermia is multifactorial; both clinical and non-clinical factors. These wide variations and gaps in practices suggest opportunities to improve utilization patterns. Supplementary Information The online version contains supplementary material available at 10.1186/s12879-022-07748-x.
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Affiliation(s)
- Kap Sum Foong
- Division of Geographic Medicine and Infectious Diseases, Tufts Medical Center, Boston, MA, USA.,Division of Infectious Diseases, Washington University School of Medicine Hospital Epidemiologist, Barnes-Jewish Hospital, 4523 Clayton Ave., Campus Box 8051, 63110, Saint Louis, MO, USA
| | - Satish Munigala
- Division of Infectious Diseases, Washington University School of Medicine Hospital Epidemiologist, Barnes-Jewish Hospital, 4523 Clayton Ave., Campus Box 8051, 63110, Saint Louis, MO, USA
| | - Stephanie Kern-Allely
- Department of Medicine, Washington University School of Medicine, St. Louis, MO, USA
| | - David K Warren
- Division of Infectious Diseases, Washington University School of Medicine Hospital Epidemiologist, Barnes-Jewish Hospital, 4523 Clayton Ave., Campus Box 8051, 63110, Saint Louis, MO, USA.
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Dräger S, Giehl C, Søgaard KK, Egli A, de Roche M, Huber LC, Osthoff M. Do we need blood culture stewardship programs? A quality control study and survey to assess the appropriateness of blood culture collection and the knowledge and attitudes among physicians in Swiss hospitals. Eur J Intern Med 2022; 103:50-56. [PMID: 35715280 DOI: 10.1016/j.ejim.2022.04.028] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 04/26/2022] [Accepted: 04/28/2022] [Indexed: 11/03/2022]
Abstract
BACKGROUND Guidance for blood culture (BC) collection is limited. Inappropriate BC collection may be associated with potentially harmful consequences for the patient such as unnecessary laboratory testing, treatment and additional costs. The aim of the study was to assess the appropriateness of BC collection and related knowledge and attitude of precribers. MATERIALS We conducted a single-center quality control study to assess the appropriateness of BC collection according to the local guidelines in a Swiss university hospital in 2020 by combining three different approaches: point prevalence, patient-individual longitudinal and diseases-related analysis. Second, we conducted a survey regarding BC collection practices and knowledge among physicians in two non-university and one university hospital using an 18-item electronic questionnaire. RESULTS We analyzed 1114 BC collected in 344 patients. Approximately 40% of the BCs were collected inappropriately, in particular in diseases with low pretest probability of bacteremia such as non-severe community acquired pneumonia (CAP). Follow-up blood culture (FUBC) collection was inappropriate in 60%. Growth of a relevant pathogen was more frequently observed in appropriately than in inappropriately collected BCs (18% vs. 3%, p < 0.001). In the survey, uncertainty concerning the need of index BC collection was high in non-severe CAP and uncomplicated cellulitis. CONCLUSIONS Almost half of the BCs was not collected according to the guidelines, especially in non-severe CAP and in case of FUBCs. Substantial uncertainty among physicians regarding BC ordering practices was identified. The implementation of diagnostic stewardship programs may improve BC collection practices, increase adherence to local guidelines, and may help reducing unnecessary diagnostics and treatment.
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Affiliation(s)
- Sarah Dräger
- Division of Internal Medicine, University Hospital Basel, Petersgraben 4, 4031 Basel, Switzerland; Department of Clinical Research, University of Basel, Schanzenstrasse 55, 4056 Basel, Switzerland.
| | - Céline Giehl
- Division of Internal Medicine, University Hospital Basel, Petersgraben 4, 4031 Basel, Switzerland.
| | - Kirstine Kobberøe Søgaard
- Division of Clinical Bacteriology and Mycology, University Hospital Basel, Petersgraben 4, 4031 Basel, Switzerland; Department of Biomedicine, University Hospital Basel, Hebelstrasse 20, 4031 Basel Switzerland.
| | - Adrian Egli
- Division of Clinical Bacteriology and Mycology, University Hospital Basel, Petersgraben 4, 4031 Basel, Switzerland; Department of Biomedicine, University Hospital Basel, Hebelstrasse 20, 4031 Basel Switzerland.
| | - Mirjam de Roche
- Department of Internal Medicine, Hospital Thun, Krankenhausstrasse 12, 3600 Thun, Switzerland.
| | - Lars C Huber
- Department of Internal Medicine, City Hospital Triemli Zurich, Birmensdorferstrasse 497, 8063 Zurich, Switzerland; University of Zurich, Raemistrasse 71, 8006 Zurich, Switzerland.
| | - Michael Osthoff
- Division of Internal Medicine, University Hospital Basel, Petersgraben 4, 4031 Basel, Switzerland; Department of Clinical Research, University of Basel, Schanzenstrasse 55, 4056 Basel, Switzerland.
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The Development and Validation of a Machine Learning Model to Predict Bacteremia and Fungemia in Hospitalized Patients Using Electronic Health Record Data. Crit Care Med 2021; 48:e1020-e1028. [PMID: 32796184 DOI: 10.1097/ccm.0000000000004556] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
OBJECTIVES Bacteremia and fungemia can cause life-threatening illness with high mortality rates, which increase with delays in antimicrobial therapy. The objective of this study is to develop machine learning models to predict blood culture results at the time of the blood culture order using routine data in the electronic health record. DESIGN Retrospective analysis of a large, multicenter inpatient data. SETTING Two academic tertiary medical centers between the years 2007 and 2018. SUBJECTS All hospitalized patients who received a blood culture during hospitalization. INTERVENTIONS The dataset was partitioned temporally into development and validation cohorts: the logistic regression and gradient boosting machine models were trained on the earliest 80% of hospital admissions and validated on the most recent 20%. MEASUREMENTS AND MAIN RESULTS There were 252,569 blood culture days-defined as nonoverlapping 24-hour periods in which one or more blood cultures were ordered. In the validation cohort, there were 50,514 blood culture days, with 3,762 cases of bacteremia (7.5%) and 370 cases of fungemia (0.7%). The gradient boosting machine model for bacteremia had significantly higher area under the receiver operating characteristic curve (0.78 [95% CI 0.77-0.78]) than the logistic regression model (0.73 [0.72-0.74]) (p < 0.001). The model identified a high-risk group with over 30 times the occurrence rate of bacteremia in the low-risk group (27.4% vs 0.9%; p < 0.001). Using the low-risk cut-off, the model identifies bacteremia with 98.7% sensitivity. The gradient boosting machine model for fungemia had high discrimination (area under the receiver operating characteristic curve 0.88 [95% CI 0.86-0.90]). The high-risk fungemia group had 252 fungemic cultures compared with one fungemic culture in the low-risk group (5.0% vs 0.02%; p < 0.001). Further, the high-risk group had a mortality rate 60 times higher than the low-risk group (28.2% vs 0.4%; p < 0.001). CONCLUSIONS Our novel models identified patients at low and high-risk for bacteremia and fungemia using routinely collected electronic health record data. Further research is needed to evaluate the cost-effectiveness and impact of model implementation in clinical practice.
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Chan JD, Ta A, Lynch JB, Bryson-Cahn C. Follow-up blood cultures in E. coli and Klebsiella spp. bacteremia-opportunities for diagnostic and antimicrobial stewardship. Eur J Clin Microbiol Infect Dis 2021; 40:1107-1111. [PMID: 33389258 DOI: 10.1007/s10096-020-04141-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Accepted: 12/21/2020] [Indexed: 11/28/2022]
Abstract
Uncomplicated Enterobacteriaceae bacteremia is usually transient and may not require follow-up blood cultures (FUBC). This is a retrospective observational study conducted at a university-affiliated urban teaching hospital in Seattle, WA. All patients ≥ 18 years hospitalized between July 2014 and August 2019 with ≥ 1 positive blood culture for either Escherichia coli or Klebsiella species were included. The primary outcome was to determine the number and frequency of FUBC obtained, and the detection rate for positive FUBC. There were 335 episodes of E. coli and Klebsiella spp. bacteremia with genitourinary (54%) being the most common source. FUBC were sent in 299 (89.3%) patients, with a median of 3 (interquartile range (IQR): 2, 4) sets of FUBC drawn per patient. Persistent bacteremia occurred in 37 (12.4%) patients. In uncomplicated E. coli and Klebsiella spp. bacteremia, when the pre-test probability of persistent bacteremia is relatively low, FUBC may not be necessary in the absence of predisposing factors.
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Affiliation(s)
- Jeannie D Chan
- Department of Pharmacy, Harborview Medical Center, and School of Pharmacy, University of Washington, 325 Ninth Avenue, Box 359885, Seattle, WA, 98104, USA. .,Department of Medicine, Division of Allergy & Infectious Diseases, School of Medicine, University of Washington, Seattle, WA, USA.
| | - Ashley Ta
- Department of Pharmacy, Harborview Medical Center, and School of Pharmacy, University of Washington, 325 Ninth Avenue, Box 359885, Seattle, WA, 98104, USA
| | - John B Lynch
- Department of Medicine, Division of Allergy & Infectious Diseases, School of Medicine, University of Washington, Seattle, WA, USA
| | - Chloe Bryson-Cahn
- Department of Medicine, Division of Allergy & Infectious Diseases, School of Medicine, University of Washington, Seattle, WA, USA
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Chan JD, Bryson-Cahn C, Kassamali-Escobar Z, Lynch JB, Schleyer AM. The Changing Landscape of Uncomplicated Gram-Negative Bacteremia: A Narrative Review to Guide Inpatient Management. J Hosp Med 2020; 15:746-753. [PMID: 32853137 DOI: 10.12788/jhm.3414] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Accepted: 03/19/2020] [Indexed: 11/20/2022]
Abstract
Gram-negative bacteremia secondary to focal infection such as skin and soft-tissue infection, pneumonia, pyelonephritis, or urinary tract infection is commonly encountered in hospital care. Current practice guidelines lack sufficient detail to inform evidence-based practices. Specifically, antimicrobial duration, criteria to transition from intravenous to oral step-down therapy, choice of oral antimicrobials, and reassessment of follow-up blood cultures are not addressed. The presence of bacteremia is often used as a justification for a prolonged course of antimicrobial therapy regardless of infection source or clinical response. Antimicrobials are lifesaving but not benign. Prolonged antimicrobial exposure is associated with adverse effects, increased rates of Clostridioides difficile infection, antimicrobial resistance, and longer hospital length of stay. Emerging evidence supports shorter overall duration of antimicrobial treatment and earlier transition to oral agents among patients with uncomplicated Enterobacteriaceae bacteremia who have achieved adequate source control and demonstrated clinical stability and improvement. After appropriate initial treatment with an intravenous antimicrobial, transition to highly bioavailable oral agents should be considered for total treatment duration of 7 days. Routine follow-up blood cultures are not cost-effective and may result in unnecessary healthcare resource utilization and inappropriate use of antimicrobials. Clinicians should incorporate these principles into the management of gram-negative bacteremia in the hospital.
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Affiliation(s)
- Jeannie D Chan
- Department of Pharmacy, Harborview Medical Center, UW Medicine, Seattle, Washington
- School of Pharmacy, University of Washington, Seattle, Washington
- Department of Medicine, Division of Allergy & Infectious Diseases, Harborview Medical Center, UW Medicine, Seattle, Washington
- School of Medicine, University of Washington, Seattle, Washington
| | - Chloe Bryson-Cahn
- Department of Medicine, Division of Allergy & Infectious Diseases, Harborview Medical Center, UW Medicine, Seattle, Washington
- School of Medicine, University of Washington, Seattle, Washington
| | - Zahra Kassamali-Escobar
- School of Pharmacy, University of Washington, Seattle, Washington
- Department of Pharmacy, Valley Medical Center, UW Medicine, Renton, Washington
| | - John B Lynch
- Department of Medicine, Division of Allergy & Infectious Diseases, Harborview Medical Center, UW Medicine, Seattle, Washington
- School of Medicine, University of Washington, Seattle, Washington
| | - Anneliese M Schleyer
- School of Medicine, University of Washington, Seattle, Washington
- Hospital Medicine, Department of Medicine, Division of General Internal Medicine, Harborview Medical Center, UW Medicine, Seattle, Washington
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Halstead DC, Sautter RL, Snyder JW, Crist AE, Nachamkin I. Reducing Blood Culture Contamination Rates: Experiences of Four Hospital Systems. Infect Dis Ther 2020; 9:389-401. [PMID: 32350778 PMCID: PMC7237585 DOI: 10.1007/s40121-020-00299-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Indexed: 11/29/2022] Open
Abstract
INTRODUCTION Blood cultures (BCs) frequently become contaminated during the pre-analytic phase of collection leading to downstream ramifications. We present a summary of performance improvement (PI) interventions provided by four hospital systems and common factors that contributed to decreased blood culture contamination (BCC) rates. METHODS Each hospital independently formed a multidisciplinary team and action plan for implementation of their intervention, focusing on the use of educational and training tools. Their goal was to significantly decrease their BCC rates. Pre- and post-intervention data were compared during the sustainment period to determine their success. RESULTS All hospitals met their goals of post-intervention BCC rates and with most achieving and sustaining BCC rates ≤ 1.0-2.0%. CONCLUSION Our report highlights how four hospitals independently achieved their objective to decrease their BCC rate with the support of a multidisciplinary team. We propose a benchmark for BCC rates of 1.5 to < 2.0% as achievable and sustainable.
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Affiliation(s)
- Diane C Halstead
- Division of Infectious Disease Diagnostic Laboratory Service, Southeastern Pathology Associates at Baptist MD Anderson Cancer Center, Jacksonville, FL, USA
| | - Robert L Sautter
- Department of Microbiology, Carolinas Pathology Group, Charlotte, NC, USA
| | - James W Snyder
- Division of Microbiology and Molecular Diagnostics, University of Louisville, Louisville, KY, USA
| | - Arthur E Crist
- Department of Laboratory Services, York Laboratory Associates at WellSpan Health System, York Hospital, York, PA, USA
| | - Irving Nachamkin
- Perelman School of Medicine, Department of Pathology and Laboratory Medicine, Hospital of the University of Pennsylvania, University of Pennsylvania, Philadelphia, PA, USA.
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Rothe K, Spinner CD, Ott A, Querbach C, Dommasch M, Aldrich C, Gebhardt F, Schneider J, Schmid RM, Busch DH, Katchanov J. Strategies for increasing diagnostic yield of community-onset bacteraemia within the emergency department: A retrospective study. PLoS One 2019; 14:e0222545. [PMID: 31513683 PMCID: PMC6742407 DOI: 10.1371/journal.pone.0222545] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Accepted: 08/31/2019] [Indexed: 11/18/2022] Open
Abstract
Bloodstream infections (BSI) are associated with high mortality. Therefore, reliable methods of detection are of paramount importance. Efficient strategies to improve diagnostic yield of bacteraemia within the emergency department (ED) are needed. We conducted a retrospective analysis of all ED encounters in a high-volume, city-centre university hospital within Germany during a five-year study period from October 2013 to September 2018. A time-series analysis was conducted for all ED encounters in which blood cultures (BCs) were collected. BC detection rates and diagnostic yield of community-onset bacteraemia were compared during the study period (which included 45 months prior to the start of a new diagnostic Antibiotic Stewardship (ABS) bundle and 15 months following its implementation). BCs were obtained from 5,191 out of 66,879 ED admissions (7.8%). Bacteraemia was detected in 1,013 encounters (19.5% of encounters where BCs were obtained). The overall yield of true bacteraemia (defined as yielding clinically relevant pathogens) was 14.4%. The new ABS-related diagnostic protocol resulted in an increased number of hospitalised patients with BCs collected in the ED (18% compared to 12.3%) and a significant increase in patients with two or more BC sets taken (59% compared to 25.4%), which resulted in an improved detection rate of true bacteraemia (2.5% versus 1.8% of hospital admissions) without any decrease in diagnostic yield. This simultaneous increase in BC rates without degradation of yield was a valuable finding that indicated success of this strategy. Thus, implementation of the new diagnostic ABS bundle within the ED, which included the presence of a skilled infectious disease (ID) team focused on obtaining BCs, appeared to be a valuable tool for the accurate and timely detection of community-onset bacteraemia.
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Affiliation(s)
- Kathrin Rothe
- Technical University of Munich, School of Medicine, Institute for Medical Microbiology, Immunology and Hygiene, Munich, Germany
- * E-mail:
| | - Christoph D. Spinner
- Technical University of Munich, School of Medicine, University Hospital rechts der Isar, Department of Medicine II, Munich, Germany
| | - Armin Ott
- Technical University of Munich, Institute of Medical Informatics, Statistics, and Epidemiology, Munich, Germany
| | - Christiane Querbach
- Technical University of Munich, School of Medicine, University Hospital rechts der Isar, Pharmacy Department, Munich, Germany
| | - Michael Dommasch
- Technical University of Munich, School of Medicine, University Hospital rechts der Isar, Department of Medicine I, Munich, Germany
| | - Cassandra Aldrich
- Ludwigs-Maximilians-University Munich, Division of Infectious Diseases and Tropical Medicine, Munich, Germany
| | - Friedemann Gebhardt
- Technical University of Munich, School of Medicine, Institute for Medical Microbiology, Immunology and Hygiene, Munich, Germany
| | - Jochen Schneider
- Technical University of Munich, School of Medicine, University Hospital rechts der Isar, Department of Medicine II, Munich, Germany
| | - Roland M. Schmid
- Technical University of Munich, School of Medicine, University Hospital rechts der Isar, Department of Medicine II, Munich, Germany
| | - Dirk H. Busch
- Technical University of Munich, School of Medicine, Institute for Medical Microbiology, Immunology and Hygiene, Munich, Germany
- German Centre for Infection Research (DZIF), Partner Site Munich, Munich, Germany
| | - Juri Katchanov
- Technical University of Munich, School of Medicine, University Hospital rechts der Isar, Department of Medicine II, Munich, Germany
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Blood culture utilization at an academic hospital: Addressing a gap in benchmarking – CORRIGENDUM. Infect Control Hosp Epidemiol 2018; 39:1507-1509. [DOI: 10.1017/ice.2018.289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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