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Pérez-Rodríguez MT, Lima O, Garrido M, Rincón A, Martínez-Lamas L, Pérez-González A, Araújo A, Amoedo A, Sousa A, López A, Cabrera X, Rubianes M. The role of time to positive blood cultures in enhancing the predictive capability of DENOVA score for diagnosing infective endocarditis in patients with Enterococcus faecalis bacteremia. Eur J Clin Microbiol Infect Dis 2024:10.1007/s10096-024-04843-6. [PMID: 38763988 DOI: 10.1007/s10096-024-04843-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2024] [Accepted: 05/03/2024] [Indexed: 05/21/2024]
Abstract
DENOVA-score is useful to stratify the risk of infective endocarditis (IE) in Enterococcus faecalis bacteremia. Recently, time to positive (TTP) of blood cultures has also been related with a higher risk of IE. The objective was to evaluate DENOVA- score with TTP to improve its specificity. We performed a retrospective, case-control study in adult patients with E. faecalis bacteremia. Thirty-nine patients with definite E. faecalis IE and 82 with E. faecalis bacteremia were included. The addition of a TTP ≤ 8 h to DENOVA-score did not improve the diagnostic accuracy of this score.
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Affiliation(s)
- M Teresa Pérez-Rodríguez
- Infectious Diseases Unit, Internal Medicine Department, Complexo Hospitalario Universitario de Vigo, Vigo, Spain.
- Galicia Sur Health Research Institute, Vigo, Spain.
| | - Olalla Lima
- Infectious Diseases Unit, Internal Medicine Department, Complexo Hospitalario Universitario de Vigo, Vigo, Spain
- Galicia Sur Health Research Institute, Vigo, Spain
| | - Martín Garrido
- Infectious Diseases Unit, Internal Medicine Department, Complexo Hospitalario Universitario de Vigo, Vigo, Spain
| | - Anniris Rincón
- Microbiology Department, Complexo Hospitalario Universitario de Vigo, Vigo, Spain
| | - Lucía Martínez-Lamas
- Galicia Sur Health Research Institute, Vigo, Spain
- Microbiology Department, Complexo Hospitalario Universitario de Vigo, Vigo, Spain
| | - Alexandre Pérez-González
- Infectious Diseases Unit, Internal Medicine Department, Complexo Hospitalario Universitario de Vigo, Vigo, Spain
- Galicia Sur Health Research Institute, Vigo, Spain
| | | | - Antía Amoedo
- Infectious Diseases Unit, Internal Medicine Department, Complexo Hospitalario Universitario de Vigo, Vigo, Spain
| | - Adrián Sousa
- Infectious Diseases Unit, Internal Medicine Department, Complexo Hospitalario Universitario de Vigo, Vigo, Spain
- Galicia Sur Health Research Institute, Vigo, Spain
| | - Ana López
- Infectious Diseases Unit, Internal Medicine Department, Complexo Hospitalario Universitario de Vigo, Vigo, Spain
- Galicia Sur Health Research Institute, Vigo, Spain
| | - Xurxo Cabrera
- Galicia Sur Health Research Institute, Vigo, Spain
- Microbiology Department, Complexo Hospitalario Universitario de Vigo, Vigo, Spain
| | - Martín Rubianes
- Infectious Diseases Unit, Internal Medicine Department, Complexo Hospitalario Universitario de Vigo, Vigo, Spain
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Henssler L, Schellenberger L, Baertl S, Klute L, Heyd R, Kerschbaum M, Alt V, Popp D. Time to Positivity in Blood Culture Bottles Inoculated with Sonication Fluid from Fracture-Related Infections. Microorganisms 2024; 12:862. [PMID: 38792692 PMCID: PMC11123396 DOI: 10.3390/microorganisms12050862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2024] [Revised: 04/22/2024] [Accepted: 04/23/2024] [Indexed: 05/26/2024] Open
Abstract
The timely and accurate identification of causative agents is crucial for effectively managing fracture-related infections (FRIs). Among various diagnostic methods, the "time to positivity" (TTP) of cultures has emerged as a valuable predictive factor in infectious diseases. While sonication of implants and inoculation of blood culture bottles with sonication fluid have enhanced sensitivity, data on the TTP of this microbiological technique remain limited. Therefore, patients with ICM criteria for confirmed FRI treated at our institution between March 2019 and March 2023 were retrospectively identified and their microbiological records were analyzed. The primary outcome parameter was TTP for different microorganism species cultured in a liquid culture collected from patients with confirmed FRI. A total of 155 sonication fluid samples from 126 patients (average age 57.0 ± 17.4 years, 68.3% males) was analyzed. Positive bacterial detection was observed in 78.7% (122/155) of the liquid culture pairs infused with sonication fluid. Staphylococcus aureus was the most prevalent organism (42.6%). Streptococcus species exhibited the fastest TTP (median 11.9 h), followed by Staphylococcus aureus (median 12.1 h) and Gram-negative bacteria (median 12.5 h), all of which had a 100% detection rate within 48 h after inoculation. Since all Gram-negative pathogens yielded positive culture results within 24 h, it could be discussed if empirical antibiotic therapy could be de-escalated early and limited towards the Gram-positive germ spectrum if no Gram-negative pathogens are detected up to this time point in the context of antibiotic stewardship.
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Affiliation(s)
- Leopold Henssler
- Department of Trauma Surgery, University Hospital Regensburg, 93053 Regensburg, Germany
| | - Lena Schellenberger
- Department of Trauma Surgery, University Hospital Regensburg, 93053 Regensburg, Germany
| | - Susanne Baertl
- Department of Trauma Surgery, University Hospital Regensburg, 93053 Regensburg, Germany
| | - Lisa Klute
- Department of Trauma Surgery, University Hospital Regensburg, 93053 Regensburg, Germany
| | - Robert Heyd
- Institute of Clinical Microbiology and Hygiene, University Hospital Regensburg, 93053 Regensburg, Germany
| | - Maximilian Kerschbaum
- Department of Trauma Surgery, University Hospital Regensburg, 93053 Regensburg, Germany
| | - Volker Alt
- Department of Trauma Surgery, University Hospital Regensburg, 93053 Regensburg, Germany
| | - Daniel Popp
- Department of Trauma Surgery, University Hospital Regensburg, 93053 Regensburg, Germany
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Comba IY, Go JR, Vaillant J, O’Horo JC, Stevens RW, Palraj R, Abu Saleh O. Sequential Time to Positivity as a Prognostic Indicator in Staphylococcus aureus Bacteremia. Open Forum Infect Dis 2024; 11:ofae173. [PMID: 38617074 PMCID: PMC11010313 DOI: 10.1093/ofid/ofae173] [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: 11/30/2023] [Accepted: 03/19/2024] [Indexed: 04/16/2024] Open
Abstract
Background We aimed to determine the factors associated with sequential blood culture time to positivity (STTP) and validate the previously defined time to positivity (TTP) ratio threshold of 1.5 in predicting adverse disease outcomes and mortality of Staphylococcus aureus bacteremia (SAB). Methods We conducted an observational study of adult patients with SAB. The TTP ratio was calculated by dividing the TTP of the second blood culture by that of the first. Results Of 186 patients, 69 (37%) were female, with a mean age of 63.6 years. Median TTP was 12 hours (interquartile range [IQR], 10-15 hours) from the initial and 21 hours (17-29) from sequential blood cultures. Methicillin-resistant S aureus (MRSA)-infected patients had significantly shorter STTPs (P < .001) and lower TTP ratios (P < .001) compared to patients with methicillin-susceptible S aureus (MSSA). A significant correlation between initial and STTP was observed in patients with MRSA (r = 0.42, P = .002) but not in those with MSSA. A higher rate of native valve endocarditis (NVE) significantly correlated with a TTP ratio of ≤1.5 (odds ratio, 2.65 [95% confidence interval, 1.3-5.6]; P = .01). The subgroup having an initial TTP <12 hours combined with a TTP ratio ≤1.5 showed the highest prevalence of NVE. Conclusions The STTP varies based on methicillin susceptibility of S aureus isolate. This study suggests a potential clinical utility of the STTP to identify patients at a higher risk of NVE. However, prospective studies are required to validate these findings.
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Affiliation(s)
- Isin Y Comba
- Division of Public Health, Infectious Diseases, and Occupational Medicine, Department of Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | - John Raymond Go
- Division of Public Health, Infectious Diseases, and Occupational Medicine, Department of Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | - James Vaillant
- Division of Public Health, Infectious Diseases, and Occupational Medicine, Department of Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | - John C O’Horo
- Division of Public Health, Infectious Diseases, and Occupational Medicine, Department of Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | - Ryan W Stevens
- Department of Pharmacy, Mayo Clinic, Rochester, Minnesota, USA
| | - Raj Palraj
- Division of Public Health, Infectious Diseases, and Occupational Medicine, Department of Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | - Omar Abu Saleh
- Division of Public Health, Infectious Diseases, and Occupational Medicine, Department of Medicine, Mayo Clinic, Rochester, Minnesota, USA
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Rasmussen M, Gilje P, Fagman E, Berge A. Bacteraemia with gram-positive bacteria-when and how do I need to look for endocarditis? Clin Microbiol Infect 2024; 30:306-311. [PMID: 37659693 DOI: 10.1016/j.cmi.2023.08.027] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 08/24/2023] [Accepted: 08/28/2023] [Indexed: 09/04/2023]
Abstract
BACKGROUND Patients with bacteraemia caused by gram-positive bacteria are at risk for infective endocarditis (IE). Because IE needs long antibiotic treatment and sometimes heart valve surgery, it is very important to identify patients with IE. OBJECTIVES In this narrative review we present and discuss how to determine which investigations to detect IE that are needed in individual patients with gram-positive bacteraemia. SOURCES Published original studies and previous reviews in English, within the relevant field are used. CONTENT First, the different qualities of the bacteraemia in relation to IE risk are discussed. The risk for IE in bacteraemia is related to the species of the bacterium but also to monomicrobial bacteraemia and the number of positive cultures. Second, patient-related factors for IE risk in bacteraemia are presented. Next, the risk stratification systems to determine the risk for IE in gram-positive bacteraemia caused by Staphylococcus aureus, viridans streptococci, and Enterococcus faecalis are presented and their use is discussed. In the last part of the review, an account for the different modalities of IE-investigations is given. The main focus is on echocardiography, which is the cornerstone of IE-investigations. Furthermore, 18F-fluorodesoxyglucose positron emission tomography/computed tomography and cardiac computed tomography are presented and their use is also discussed. A brief account for investigations used to identify embolic phenomena in IE is also given. Finally, we present a flowchart suggesting which investigations to perform in relation to IE in patients with gram-positive bacteraemia. IMPLICATIONS For the individual patient as well as the healthcare system, it is important both to diagnose IE and to decide when to stop looking for IE. This review might be helpful in finding that balance.
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Affiliation(s)
- Magnus Rasmussen
- Department of Clinical Sciences Lund, Division of Infection Medicine, Lund University, Lund, Sweden; Department for Infectious Diseases, Skåne University Hospital, Lund, Sweden.
| | - Patrik Gilje
- Department of Cardiology, Clinical Sciences, Lund University and Skane University Hospital, Lund, Sweden
| | - Erika Fagman
- Department of Radiology, Sahlgrenska University Hospital, Gothenburg, Sweden; Department of Radiology, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Andreas Berge
- Unit of Infectious Diseases, Department of Medicine, Solna, Karolinska Institutet, Stockholm, Sweden; Department of Infectious Diseases, Karolinska University Hospital, Stockholm, Sweden
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5
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Woods EC, Nakasone TSM, Renault CA. Clinical reasoning for performance of transesophageal echocardiography in veterans with Staphylococcus aureus bacteremia. ANTIMICROBIAL STEWARDSHIP & HEALTHCARE EPIDEMIOLOGY : ASHE 2023; 3:e221. [PMID: 38156239 PMCID: PMC10753505 DOI: 10.1017/ash.2023.493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 10/18/2023] [Accepted: 10/19/2023] [Indexed: 12/30/2023]
Abstract
This study examined physicians' reasoning about obtaining transesophageal echocardiography (TEE) in cases of Staphylococcus aureus bacteremia (SAB). In 221 cases of SAB over 5 years, the most common reasons for not performing TEE were clinical response to antibiotics, negative TTE results, and the expectation that TEE would not change management.
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Affiliation(s)
- Emily C. Woods
- Stanford University School of Medicine, Stanford, CA, USA
| | | | - Cybele A. Renault
- Stanford University School of Medicine, Stanford, CA, USA
- Veterans Affairs Palo Alto Health Care System, Palo Alto, CA, USA
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6
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Bläckberg A, Lundberg K, Svedevall S, Nilson B, Rasmussen M. Time to positivity of blood cultures in bloodstream infections with Streptococcus dysgalactiae and association with outcome. Infect Dis (Lond) 2023; 55:333-339. [PMID: 36847483 DOI: 10.1080/23744235.2023.2182910] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/01/2023] Open
Abstract
PURPOSE Invasive infections with Streptococcus dysgalactiae predominantly occur in persons of older age with substantial morbidity and mortality. Time to positivity from blood cultures (TTP) has been shown to be a prognostic indicator in bloodstream infections caused by other beta-haemolytic streptococci. This study aimed to determine any possible association between TTP and outcome in invasive infections due to S. dysgalactiae. MATERIALS AND METHODS Episodes of S. dysgalactiae bacteraemia, that occurred during 2015-2018 in the Region of Skåne, Sweden, were identified through the laboratory database and retrospectively studied. Any association with TTP and the primary outcome, death within 30 days and the development of sepsis or disease deterioration within 48 hours from blood culturing as secondary outcomes were investigated. RESULTS Among the 287 episodes of S. dysgalactiae bacteraemia, 30-day mortality rate was 10% (n = 30). Median TTP was 9.3 h (interquartile range 8.0-10.3 h). Median TTP was statistically significantly shorter in patients who died within 30 days compared to surviving patients (7.7 vs 9.3 h, p = .001, Mann-Whitney U test). Short TTP(≤ 7.9 h) was still associated with 30-day mortality when adjusting for age, (OR 4.4, 95% CI 1.6-12.2, p = .004). Associations between secondary outcomes and levels of TTP were not observed. CONCLUSION TTP may be an important prognostic indicator for 30-day mortality in patients with bloodstream infections due to S. dysgalactiae.
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Affiliation(s)
- Anna Bläckberg
- Division of Infection Medicine, Department of Clinical Sciences Lund, Lund University, Lund, Sweden.,Department of Infectious Diseases, Skåne University Hospital, Lund, Sweden
| | - Katrina Lundberg
- Division of Infection Medicine, Department of Clinical Sciences Lund, Lund University, Lund, Sweden
| | - Stina Svedevall
- Division of Infection Medicine, Department of Clinical Sciences Lund, Lund University, Lund, Sweden
| | - Bo Nilson
- Department of Clinical Microbiology, Infection Control and Prevention, Office for Medical Services, Lund, Sweden.,Division of Medical Microbiology, Department of Experimental Medicine Lund, Lund University, Office for Medical Services, Lund, Sweden
| | - Magnus Rasmussen
- Division of Infection Medicine, Department of Clinical Sciences Lund, Lund University, Lund, Sweden.,Department of Infectious Diseases, Skåne University Hospital, Lund, Sweden
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7
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Hou W, Han T, Qu G, Sun Y, Yang D, Lin Y. Is early time to positivity of blood culture associated with clinical prognosis in patients with Klebsiella pneumoniae bloodstream infection? Epidemiol Infect 2023; 151:e43. [PMID: 36805070 PMCID: PMC10028975 DOI: 10.1017/s0950268823000262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023] Open
Abstract
The association between time to positivity (TTP) of blood culture and the clinical prognosis of patients with Klebsiella pneumoniae bloodstream infection (BSI) remains unclear. A retrospective study of 148 inpatients with BSI caused by K. pneumoniae was performed at Shanghai Tongji Hospital, China, from October 2016-2020. The total in-hospital fatality rate was 32%. The median TTP was 11.0 (7.7-16.1) h and the optimal cutoff for prediction of in-hospital mortality was 9.4 h according to the ROC curve. Early TTP (<9.4 h) was a risk factor for in-hospital mortality by univariate analysis (OR = 2.5, 95% CI 1.2-5.0, P = 0.01), but not by multivariate analysis (OR = 2.7, 95% CI 1.0-7.4, P = 0.06). Old age, serum creatinine, white blood cells, and C-reactive protein values were risk factors for in-hospital mortality by multivariate analysis. Early TTP was not a risk factor for septic shock (OR = 1.8, 95% CI 0.6-5.1, P = 0.27) or ICU admission (OR = 1.0, 95% CI 1.0-1.0, P = 0.32). In conclusion, the in-hospital fatality rate of patients with K. pneumoniae BSI was relatively high and associated with an early TTP of blood cultures. However, no increased risk of mortality, septic shock or ICU admission was evident in early TTP patients.
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Affiliation(s)
- Weiwei Hou
- Department of Laboratory Medicine, Tongji Hospital, School of Medicine, Tongji University, Shanghai 200065, China
| | - Tiantian Han
- Department of Hospital Infection Control, Tongji Hospital, School of Medicine, Tongji University, Shanghai 200065, China
| | - Guangbo Qu
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, Hefei, 230032, Anhui Province, China
| | - Yehuan Sun
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, Hefei, 230032, Anhui Province, China
| | - Dianyu Yang
- Department of Laboratory Medicine, Tongji Hospital, School of Medicine, Tongji University, Shanghai 200065, China
| | - Yan Lin
- Department of Hospital Infection Control, Tongji Hospital, School of Medicine, Tongji University, Shanghai 200065, China
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8
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Tarabichi S, Goh GS, Zanna L, Qadiri QS, Baker CM, Gehrke T, Citak M, Parvizi J. Time to Positivity of Cultures Obtained for Periprosthetic Joint Infection. J Bone Joint Surg Am 2023; 105:107-112. [PMID: 36574630 DOI: 10.2106/jbjs.22.00766] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
BACKGROUND Despite its well-established limitations, culture remains the gold standard for microbial identification in periprosthetic joint infection (PJI). However, there are no benchmarks for the time to positivity (TTP) on culture for specific microorganisms. This study aimed to determine the TTP for pathogens commonly encountered in PJI. METHODS This retrospective, multicenter study reviewed prospectively maintained institutional PJI databases to identify patients who underwent hip or knee revision arthroplasty from 2017 to 2021 at 2 tertiary centers in the United States and Germany. Only patients who met the 2018 International Consensus Meeting (ICM) criteria for PJI and had a positive intraoperative culture were included. TTP on culture media was recorded for each sample taken intraoperatively. The median TTP was compared among different microbial species and different specimen types. Data are presented either as the mean and the standard deviation or as the median and the interquartile range (IQR). RESULTS A total of 536 ICM-positive patients with positive cultures were included. The mean number of positive cultures per patient was 3.9 ± 2.6. The median TTP, in days, for all positive cultures was 3.3 (IQR, 1.9 to 5.4). Overall, gram-negative organisms (TTP, 1.99 [1.1 to 4.1]; n = 225) grew significantly faster on culture compared with gram-positive organisms (TTP, 3.33 [1.9 to 5.8]; n = 1,774). Methicillin-resistant Staphylococcus aureus (TTP, 1.42 [1.0 to 2.8]; n = 85) had the fastest TTP, followed by gram-negative rods (TTP, 1.92 [1.0 to 3.9]; n = 163), methicillin-sensitive Staphylococcus aureus (TTP, 1.95 [1.1 to 3.3] n = 393), Streptococcus species (TTP, 2.92 [1.2 to 4.3]; n = 230), Staphylococcus epidermidis (TTP, 4.20 [2.4 to 5.5]; n = 555), Candida species (TTP, 5.30 [3.1 to 10]; n = 63), and Cutibacterium acnes (TTP, 6.97 [5.9 to 8.2]; n = 197). When evaluating the median TTP according to specimen type, synovial fluid (TTP, 1.97 [1.1 to 3.1]; n = 112) exhibited the shortest TTP, followed by soft tissue (TTP, 3.17 [1.4 to 5.3]; n = 1,199) and bone (TTP, 4.16 [2.3 to 5.9]; n = 782). CONCLUSIONS To our knowledge, this is the first study to examine the TTP of common microorganisms that are known to cause PJI. Increased awareness of these data may help to guide the selection of appropriate antimicrobial therapy and to predict treatment outcomes in the future. Nonetheless, additional studies with larger cohorts are needed to validate these benchmarks. LEVEL OF EVIDENCE Diagnostic Level IV . See Instructions for Authors for a complete description of levels of evidence.
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Affiliation(s)
- Saad Tarabichi
- Rothman Orthopaedic Institute, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania
| | - Graham S Goh
- Rothman Orthopaedic Institute, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania
| | - Luigi Zanna
- Traumatology and General Orthopedics Department, Careggi University Hospital, Florence, Italy.,Department of Orthopaedic Surgery, Helios ENDO-Klinik Hamburg, Hamburg, Germany
| | - Qudratullah S Qadiri
- Rothman Orthopaedic Institute, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania
| | - Colin M Baker
- Rothman Orthopaedic Institute, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania
| | - Thorsten Gehrke
- Department of Orthopaedic Surgery, Helios ENDO-Klinik Hamburg, Hamburg, Germany
| | - Mustafa Citak
- Department of Orthopaedic Surgery, Helios ENDO-Klinik Hamburg, Hamburg, Germany
| | - Javad Parvizi
- Rothman Orthopaedic Institute, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania
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Cuervo G. PET/CT to diagnose and manage patients with infectious diseases: "¡vamos a brillar, mi amor! (Let's shine, my love!)". ENFERMEDADES INFECCIOSAS Y MICROBIOLOGIA CLINICA (ENGLISH ED.) 2023; 41:1-2. [PMID: 36621242 DOI: 10.1016/j.eimce.2022.09.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Accepted: 09/21/2022] [Indexed: 01/09/2023]
Affiliation(s)
- Guillermo Cuervo
- Department of Infectious Diseases, Hospital Clínic, Universitat de Barcelona, Barcelona, Spain.
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10
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Cuervo G. PET/CT to diagnose and manage patients with infectious diseases: “¡vamos a brillar, mi amor! (Let's shine, my love!)”. Enferm Infecc Microbiol Clin 2022. [DOI: 10.1016/j.eimc.2022.09.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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11
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Laupland KB, Harris PN, Stewart AG, Edwards F, Paterson DL. Culture-based determinants and outcome of Staphylococcus aureus bloodstream infections. Diagn Microbiol Infect Dis 2022; 104:115772. [DOI: 10.1016/j.diagmicrobio.2022.115772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2022] [Revised: 07/12/2022] [Accepted: 07/17/2022] [Indexed: 11/03/2022]
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Clinical Impact of Time-to-Positivity of Blood Cultures on Mortality in Patients with Pseudomonas aeruginosa Bacteremia. J Glob Antimicrob Resist 2022; 30:269-275. [PMID: 35787987 DOI: 10.1016/j.jgar.2022.06.026] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 06/22/2022] [Accepted: 06/25/2022] [Indexed: 11/20/2022] Open
Abstract
OBJECTIVES To investigate the impact of the time-to-positivity of blood cultures (TTP) on 30-day mortality in patients with Pseudomonas aeruginosa (PA) bacteremia. METHODS All non-duplicated episodes of PA monomicrobial bacteremia in adult patients from January 2013 to February 2020 were analysed. Epidemiological and clinical data were collected. TTP for PA isolates was automatically recorded. Multivariate analysis identified factors predicting 30-day overall mortality. RESULTS A total of 328 patients were identified. The median TTP for PA isolates was 15 h (IQR 12-18 h). All MDR/XDR episodes were positive within the first 36 h. The 30-day mortality rate was 32.3%. The best cut-off value of the TTP for predicting mortality was 16 h (AUC 0.62, 95% CI 0.56-0.67, P=0.001). The 30-day mortality rate was significantly higher in the TTP ≤16 h group (41.0% versus 19.5%, P<0.001). In a multivariate analysis, severe neutropenia (aOR 2.67, 95% CI 1.4-5.09, P=0.002), septic shock (aOR 3.21, 95% CI 1.57-5.89, P<0.001), respiratory source (aOR 4.37, 95% CI 2.24-8.52, P<0.001), nosocomial acquisition (aOR 1.99, 95% CI 1.06-3.71, P=0.030), TTP≤ 16 h (aOR 2.27, 95% CI 2.12-4.25, P=0.010) and MDR/XDR phenotype (aOR 2.54, 95% CI 1.38-4.67, P=0.002) were independently associated with 30-day mortality. CONCLUSIONS A short TTP (≤16 h) was independently associated with increased 30-day mortality. After local validation, this routinely microbiological parameter might be useful for guiding empirical antipseudomonal therapies and supporting the close monitoring of patients with PA bacteremia.
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13
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Simos PA, Holland DJ, Stewart A, Isler B, Hughes I, Price N, Henderson A, Alcorn K. Clinical prediction scores and the utility of time to blood culture positivity in stratifying the risk of infective endocarditis in Staphylococcus aureus bacteraemia. J Antimicrob Chemother 2022; 77:2003-2010. [DOI: 10.1093/jac/dkac129] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Accepted: 03/31/2022] [Indexed: 12/12/2022] Open
Abstract
Abstract
Background
Infective endocarditis (IE) complicates up to a quarter of Staphylococcus aureus bacteraemia (SAB) cases. Risk scores predict IE complicating SAB but have undergone limited external validation, especially in community-acquired infections and those who use IV drugs. Addition of the time to positive culture (TTP) may provide incremental risk prognostication.
Objectives
To externally validate risk scores for predicting IE in SAB and assess the incremental value of TTP.
Methods
The modified Duke score was calculated for adults hospitalized with SAB at a major tertiary institution. All patients underwent echocardiography. Sensitivity and specificity of the risk scores for predicting IE were calculated, and the incremental value of TTP was assessed.
Results
One hundred and six cases were analysed and 18 (17%) met definite IE criteria. The optimal TTP to predict IE was 11.5 h (sensitivity 88.9%; specificity 71.6%). The sensitivity of VIRSTA and PREDICT (Predicting risk of endocarditis using a clinical tool) were similar (94.4% for both) and higher than POSITIVE (Prediction Of Staphylococcus aureus Infective endocarditis Time to positivity, IV drug use, Vascular phenomena, pre-Existing heart condition; 77.8%). The receiver-operator characteristic AUCs were VIRSTA 0.83, PREDICT 0.75, POSITIVE 0.89 and TTP 0.85. Adding TTP to VIRSTA (i.e. VIRSTA+) resulted in the highest AUC (0.90), sensitivity (100%) and negative predictive value (100%), albeit with a low specificity (33%).
Conclusions
The VIRSTA and POSITIVE scores were the strongest predictors for IE complicating SAB. The addition of TTP to VIRSTA (VIRSTA+) significantly improved discriminatory value and may be safely used to rationalize echocardiography strategies.
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Affiliation(s)
- Peter A. Simos
- Infection Management Services, Princess Alexandra Hospital, Brisbane, Queensland, Australia
- Infectious Disease Department, Gold Coast University Hospital, Southport, Queensland, Australia
| | - David J. Holland
- Department of Cardiology, Sunshine Coast University Hospital, Birtinya, Queensland, Australia
- School of Human Movement and Nutrition Studies, The University of Queensland, Brisbane, Queensland, Australia
- School of Medicine, Griffith University, Birtinya, Queensland, Australia
| | - Adam Stewart
- Centre for Clinical Research, Faculty of Medicine, The University of Queensland, Royal Brisbane and Women’s Hospital Campus, Brisbane, Australia
- Department of Infectious Diseases, Royal Brisbane and Women’s Hospital, Brisbane, Australia
- Central Microbiology, Pathology Queensland, Royal Brisbane and Women’s Hospital, Brisbane, Australia
| | - Burcu Isler
- Infection Management Services, Princess Alexandra Hospital, Brisbane, Queensland, Australia
- Centre for Clinical Research, Faculty of Medicine, The University of Queensland, Royal Brisbane and Women’s Hospital Campus, Brisbane, Australia
| | - Ian Hughes
- Office for Research Governance and Development, Gold Coast Health, School of Medicine, The University of Queensland, Brisbane, Queensland, Australia
| | - Nathan Price
- Infection Management Services, Princess Alexandra Hospital, Brisbane, Queensland, Australia
| | - Andrew Henderson
- Infection Management Services, Princess Alexandra Hospital, Brisbane, Queensland, Australia
| | - Kylie Alcorn
- Infectious Disease Department, Gold Coast University Hospital, Southport, Queensland, Australia
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14
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Bläckberg A, Svedevall S, Lundberg K, Nilson B, Kahn F, Rasmussen M. Time to blood culture positivity- an independent predictor of mortality in Streptococcus pyogenes bacteraemia. Open Forum Infect Dis 2022; 9:ofac163. [PMID: 35615297 PMCID: PMC9126491 DOI: 10.1093/ofid/ofac163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Accepted: 04/01/2022] [Indexed: 11/26/2022] Open
Abstract
Background Streptococcus pyogenes bacteremia is a severe condition with high mortality. Time to blood culture positivity (TTP) is known to predict the outcome in bacteremia with other pathogens. This study aimed to determine the association between TTP and outcome in S pyogenes bacteremia. Methods This retrospective observational cohort study comprised adults with S pyogenes bacteremia, identified through the laboratory database between 2015 and 2018, in the Region of Skåne, Sweden. Correlations between TTP and outcomes were investigated. Primary outcome was death within 30 days, and secondary outcomes were presence of sepsis or disease deterioration within the first 48 hours. Results A total of 347 episodes of S pyogenes bacteremia were identified, of which 61 were excluded, resulting in 286 included episodes. Median TTP was 10.4 (interquartile range, 8.4–11.4) hours. Thirty-day mortality was 10%. Median TTP was shorter in patients who died within 30 days compared to survivors (8.6 vs 10.4 hours; P < .001). In a multivariable logistic regression, shorter TTP was associated with 30-day mortality when adjusting for age, Charlson Comorbidity Index, and focus of infection (odds ratio, 3.7 [95% confidence interval, 1.2–11.3]; P = .02). There was no statistically significant difference in TTP between patients with sepsis within 48 hours and those who did not have sepsis. Additionally, there was no statistically significant difference in TTP between patients with disease deterioration compared to those who did not deteriorate. Conclusions Knowledge on TTP might be a tool to determine the prognosis of a given patient with S pyogenes bacteremia.
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Affiliation(s)
- Anna Bläckberg
- Division of Infection Medicine, Department of Clinical Sciences Lund, Lund University, Lund, Sweden
- Department of Infectious Diseases, Skåne University Hospital, Lund, Sweden
| | - Stina Svedevall
- Division of Infection Medicine, Department of Clinical Sciences Lund, Lund University, Lund, Sweden
| | - Katrina Lundberg
- Division of Infection Medicine, Department of Clinical Sciences Lund, Lund University, Lund, Sweden
| | - Bo Nilson
- Department of Clinical Microbiology, Infection Control and Prevention, Office for Medical Services, Region Skåne, Lund, Sweden
- Division of Medical Microbiology, Department of Experimental Medicine Lund, Lund University, Office for Medical Services, Region Skåne, Lund, Sweden
| | - Fredrik Kahn
- Division of Infection Medicine, Department of Clinical Sciences Lund, Lund University, Lund, Sweden
- Department of Infectious Diseases, Skåne University Hospital, Lund, Sweden
| | - Magnus Rasmussen
- Division of Infection Medicine, Department of Clinical Sciences Lund, Lund University, Lund, Sweden
- Department of Infectious Diseases, Skåne University Hospital, Lund, Sweden
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15
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The Impact of Implementing the Virtuo Blood Culture System on the Characteristics and Management of Patients with Staphylococcus aureus Bacteremia. J Clin Microbiol 2022; 60:e0226121. [PMID: 35291804 DOI: 10.1128/jcm.02261-21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Persistent Staphylococcus aureus bacteremia (SAB) has been associated with increased mortality. Enhanced microbial detection with new blood culture technology may improve detection of S. aureus in patients with SAB. We performed a 24-month retrospective study of hospitalized adults with SAB and an infectious diseases consult comparing two time periods pre- (January to December 2018) and postimplementation (January to December 2019) in which the VersaTREK and BacT/Alert Virtuo blood culture systems were used, respectively. Measurements included SAB duration, time to positivity, source of bacteremia, antimicrobial therapy, and mortality. A total of 416 episodes of SAB occurred during the study period: 176 (42%) pre- and 240 (58%) postimplementation. Patients in both periods had similar clinical characteristics; however, patients in the postimplementation period were more likely to have intermediate (3 to 6 days; 23% versus 40%; P < 0.001) and prolonged SAB duration (>7 days; 4% versus 14%; P < 0.001). Combination antistaphylococcal therapy was more frequent postimplementation (6.3% pre- versus 15.8% postimplementation; P = 0.003), and the median time to source control was shorter (4 versus 2 days; P = 0.02). Median time to positivity for the index blood culture was shorter postimplementation (17.8 h pre- versus 13.3 h postimplementation; P < 0.001). There was no difference in 90-day all-cause readmissions (51% versus 44%; P = 0.11) or mortality (32% versus 32%; P = 0.95). An increased frequency of prolonged SAB with increased use of combination antistaphylococcal therapy was noted with implementation of a new blood culture system, likely secondary to the blood culture media; however, no differences on adverse outcomes were noted.
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16
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Calderón-Parra J, Diego-Yagüe I, Santamarina-Alcantud B, Mingo-Santos S, Mora-Vargas A, Vázquez-Comendador JM, Fernández-Cruz A, Muñez-Rubio E, Gutiérrez-Villanueva A, Sánchez-Romero I, Ramos-Martínez A. Unreliability of Clinical Prediction Rules to Exclude without Echocardiography Infective Endocarditis in Staphylococcus aureus Bacteremia. J Clin Med 2022; 11:jcm11061502. [PMID: 35329827 PMCID: PMC8955153 DOI: 10.3390/jcm11061502] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2022] [Revised: 03/06/2022] [Accepted: 03/07/2022] [Indexed: 02/01/2023] Open
Abstract
BACKGROUND It is unclear whether the use of clinical prediction rules is sufficient to rule out infective endocarditis (IE) in patients with Staphylococcus aureus bacteremia (SAB) without an echocardiogram evaluation, either transthoracic (TTE) and/or transesophageal (TEE). Our primary purpose was to test the usefulness of PREDICT, POSITIVE, and VIRSTA scores to rule out IE without echocardiography. Our secondary purpose was to evaluate whether not performing an echocardiogram evaluation is associated with higher mortality. METHODS We conducted a unicentric retrospective cohort including all patients with a first SAB episode from January 2015 to December 2020. IE was defined according to modified Duke criteria. We predefined threshold cutoff points to consider that IE was ruled out by means of the mentioned scores. To assess 30-day mortality, we used a multivariable regression model considering performing an echocardiogram as covariate. RESULTS Out of 404 patients, IE was diagnosed in 50 (12.4%). Prevalence of IE within patients with negative PREDICT, POSITIVE, and VIRSTA scores was: 3.6% (95% CI 0.1-6.9%), 4.9% (95% CI 2.2-7.7%), and 2.2% (95% CI 0.2-4.3%), respectively. Patients with negative VIRSTA and negative TTE had an IE prevalence of 0.9% (95% CI 0-2.8%). Performing an echocardiogram was independently associated with lower 30-day mortality (OR 0.24 95% CI 0.10-0.54, p = 0.001). CONCLUSION PREDICT and POSITIVE scores were not sufficient to rule out IE without TEE. In patients with negative VIRSTA score, it was doubtful if IE could be discarded with a negative TTE. Not performing an echocardiogram was associated with worse outcomes, which might be related to presence of occult IE. Further studies are needed to assess the usefulness of clinical prediction rules in avoiding echocardiographic evaluation in SAB patients.
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Affiliation(s)
- Jorge Calderón-Parra
- Infectious Diseases Unit, Service of Internal Medicine, Hospital Universitario Puerta de Hierro, 28222 Majadahonda, Spain; (I.D.-Y.); (A.M.-V.); (J.M.V.-C.); (A.F.-C.); (E.M.-R.); (A.G.-V.); (A.R.-M.)
- Investigational Institute Puerta de Hierro-Segovia de Arana (IDIPHSA), 28222 Majadahonda, Spain
- Correspondence:
| | - Itziar Diego-Yagüe
- Infectious Diseases Unit, Service of Internal Medicine, Hospital Universitario Puerta de Hierro, 28222 Majadahonda, Spain; (I.D.-Y.); (A.M.-V.); (J.M.V.-C.); (A.F.-C.); (E.M.-R.); (A.G.-V.); (A.R.-M.)
| | | | - Susana Mingo-Santos
- Cardiology Department, Hospital Universitario Puerta de Hierro, 28222 Majadahonda, Spain;
| | - Alberto Mora-Vargas
- Infectious Diseases Unit, Service of Internal Medicine, Hospital Universitario Puerta de Hierro, 28222 Majadahonda, Spain; (I.D.-Y.); (A.M.-V.); (J.M.V.-C.); (A.F.-C.); (E.M.-R.); (A.G.-V.); (A.R.-M.)
| | - José Manuel Vázquez-Comendador
- Infectious Diseases Unit, Service of Internal Medicine, Hospital Universitario Puerta de Hierro, 28222 Majadahonda, Spain; (I.D.-Y.); (A.M.-V.); (J.M.V.-C.); (A.F.-C.); (E.M.-R.); (A.G.-V.); (A.R.-M.)
| | - Ana Fernández-Cruz
- Infectious Diseases Unit, Service of Internal Medicine, Hospital Universitario Puerta de Hierro, 28222 Majadahonda, Spain; (I.D.-Y.); (A.M.-V.); (J.M.V.-C.); (A.F.-C.); (E.M.-R.); (A.G.-V.); (A.R.-M.)
- Investigational Institute Puerta de Hierro-Segovia de Arana (IDIPHSA), 28222 Majadahonda, Spain
| | - Elena Muñez-Rubio
- Infectious Diseases Unit, Service of Internal Medicine, Hospital Universitario Puerta de Hierro, 28222 Majadahonda, Spain; (I.D.-Y.); (A.M.-V.); (J.M.V.-C.); (A.F.-C.); (E.M.-R.); (A.G.-V.); (A.R.-M.)
- Investigational Institute Puerta de Hierro-Segovia de Arana (IDIPHSA), 28222 Majadahonda, Spain
| | - Andrea Gutiérrez-Villanueva
- Infectious Diseases Unit, Service of Internal Medicine, Hospital Universitario Puerta de Hierro, 28222 Majadahonda, Spain; (I.D.-Y.); (A.M.-V.); (J.M.V.-C.); (A.F.-C.); (E.M.-R.); (A.G.-V.); (A.R.-M.)
| | - Isabel Sánchez-Romero
- Microbiology Service, Hospital Universitario Puerta de Hierro, 28222 Majadahonda, Spain; (B.S.-A.); (I.S.-R.)
| | - Antonio Ramos-Martínez
- Infectious Diseases Unit, Service of Internal Medicine, Hospital Universitario Puerta de Hierro, 28222 Majadahonda, Spain; (I.D.-Y.); (A.M.-V.); (J.M.V.-C.); (A.F.-C.); (E.M.-R.); (A.G.-V.); (A.R.-M.)
- Investigational Institute Puerta de Hierro-Segovia de Arana (IDIPHSA), 28222 Majadahonda, Spain
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Hsieh YC, Chen HL, Lin SY, Chen TC, Lu PL. Short time to positivity of blood culture predicts mortality and septic shock in bacteremic patients: a systematic review and meta-analysis. BMC Infect Dis 2022; 22:142. [PMID: 35144551 PMCID: PMC8830084 DOI: 10.1186/s12879-022-07098-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Accepted: 01/27/2022] [Indexed: 11/12/2022] Open
Abstract
Background The value of time to positivity (TTP) on diagnosis for catheter-related bloodstream infection and distinguishment on bacteria group and infection source has been investigated. However, the relationship between TTP and patient outcome requires verification, and we performed a systematic review and meta-analysis. Methods We searched PubMed, EMBASE, CINAHL, Cochrane Library, Web of Science for publications associated with the topic. We included studies that researched the TTP on predicting patient mortality and septic shock. Quality assessment is performed with Critical Appraisal Skills Programme (CASP). The analysis is performed using Review Manager Version 5.0.24. on articles available for data extraction on the exact population of each outcome group. The existence of publication bias was assessed by funnel plots. Statistical heterogeneity was evaluated using the Cochran Q and \documentclass[12pt]{minimal}
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\begin{document}$${I}^{2}$$\end{document}I2 statistics. The outcome is reported as an odds ratio. PROSPERO registration: CRD42021272286. Results Twenty-four eligible studies were included in our study. Twenty-four in the mortality group and six in the septic shock group. Mortality is significantly associated with the short time to positivity group with an odds ratio of 2.98 (95% CI: 2.25–3.96, p-value < 0.001). The odds ratio for developing septic shock in the short TTP group is 4.06 (95% CI: 2.41–6.84, p-value < 0.001). Subgroup analysis revealed short TTP as a significant predictor of mortality and septic shock in Gram's positive and Gram's negative related bloodstream infections. TTP is not associated with mortality among patients with candidaemia. Conclusions Short time to positivity is a reliable marker for patient outcome in certain bacterial species. Studies concerning confounding factors such as the delay in bottle loading and other confounding factors are needed to enhance external validity. Supplementary Information The online version contains supplementary material available at 10.1186/s12879-022-07098-8.
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Affiliation(s)
- Ya-Chu Hsieh
- Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Hsiao-Ling Chen
- Department of Pharmacy, Kaohsiung Municipal Ta-Tung Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Shang-Yi Lin
- Division of Infectious Diseases, Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan.,Department of Laboratory Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan.,School of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Tun-Chieh Chen
- Division of Infectious Diseases, Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan. .,School of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan. .,Department of Internal Medicine and Infection Control Office, Kaohsiung Municipal Ta-Tung Hospital, Kaohsiung Medical University, No. 68, Chunghwa 3rd Road, Kaohsiung, Taiwan.
| | - Po-Liang Lu
- Division of Infectious Diseases, Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan.,School of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
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18
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Russo C, Mikulska M, Bassetti M. Re: 'time to blood culture positivity in Staphylococcus aureus bacteraemia to determine risk of infective endocarditis' by Kahn et al. Clin Microbiol Infect 2022; 28:745-746. [PMID: 35031488 DOI: 10.1016/j.cmi.2021.12.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Accepted: 12/25/2021] [Indexed: 11/19/2022]
Affiliation(s)
- Chiara Russo
- Division of Infectious Diseases, Department of Health Sciences, University of Genoa, Genoa, Italy; Division of Infectious Diseases, Ospedale Policlinico San Martino, Genoa, Italy.
| | - Malgorzata Mikulska
- Division of Infectious Diseases, Department of Health Sciences, University of Genoa, Genoa, Italy; Division of Infectious Diseases, Ospedale Policlinico San Martino, Genoa, Italy
| | - Matteo Bassetti
- Division of Infectious Diseases, Department of Health Sciences, University of Genoa, Genoa, Italy; Division of Infectious Diseases, Ospedale Policlinico San Martino, Genoa, Italy
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19
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Nygren D, Oldberg K, Holm K. Short blood culture time-to-positivity in Fusobacterium necrophorum bacteremia is associated with Lemierre's syndrome. Anaerobe 2021; 73:102474. [PMID: 34758377 DOI: 10.1016/j.anaerobe.2021.102474] [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: 03/09/2021] [Revised: 09/29/2021] [Accepted: 11/02/2021] [Indexed: 11/01/2022]
Abstract
The usefulness of blood culture time-to-positivity (TTP) in the diagnosis of endovascular infections has previously been shown. Here, we investigated TTP in 41 patients with F. necrophorum bacteraemia and found an association between short TTP and Lemierre's syndrome (p = 0.026).
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Affiliation(s)
- David Nygren
- Division of Infection Medicine, Department for Clinical Sciences Lund, Medical Faculty, Lund University, Lund, Sweden.
| | - Karl Oldberg
- Division of Infection Medicine, Department for Clinical Sciences Lund, Medical Faculty, Lund University, Lund, Sweden; Clinical Microbiology, Labmedicin, Region Skåne, Lund, Sweden
| | - Karin Holm
- Division of Infection Medicine, Department for Clinical Sciences Lund, Medical Faculty, Lund University, Lund, Sweden
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20
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Staphylococcus aureus Bacteremia in Hospitalized Patients and Associated Factors: A Cross-sectional Study from Mashhad, Iran. Jundishapur J Microbiol 2021. [DOI: 10.5812/jjm.116313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Background: Staphylococcus aureus is an important cause of resistant infection with high mortality and morbidity. Objectives: We aimed to evaluate the clinical characteristics and comorbidities of patients with S. aureus infection to define the predictors of adverse outcomes. Methods: In this cross-sectional study, patients (aged ≥ 15 years) with positive S. aureus blood cultures were included. Their demographic and clinical characteristics were recorded, and their association with the main adverse outcomes (methicillin-resistant S. aureus [MRSA], infective endocarditis, source of infection, and the final outcome were analyzed using SPSS software version 16. Results: The male-to-female ratio was 54/51. The mean age was 55.13 years (women: 58.45 ± 20.4 and men: 53.6 ± 17.6). Of 105 cases analyzed, 40% had hospital-, 25.7% community-, and 34.3% healthcare-associated bacteremia. The median duration of hospital admission was 13 days. Thirty-two percent had MRSA, differently based on the source of infection (P = 0.029). Twenty-eight patients had infective endocarditis, differently based on the source of infection, prosthetics, considerable foci of infection, and receipt of blood and its derivatives (P < 0.05). Most patients with neurological and end-stage renal disease (both P = 0.001) did not have infective endocarditis. Finally, 61.9% of the patients were discharged with good condition, 38.1% died, and 9% left the hospital before diagnosis of the foci. Conclusions: Vascular catheters and cardiovascular diseases, including hypertension, are among the most common factors associated with S. aureus bacteremia, and it is necessary to carefully examine the presence of these factors, as well as infective endocarditis in these patients.
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21
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Re: ‘Time to blood culture positivity in Staphylococcus aureus bacteraemia to determine risk of infective endocarditis’ by Kahn et al. Clin Microbiol Infect 2021; 27:1365-1366. [DOI: 10.1016/j.cmi.2021.02.016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Revised: 02/07/2021] [Accepted: 02/14/2021] [Indexed: 01/15/2023]
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22
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van der Vaart TW, Prins JM, Soetekouw R, van Twillert G, Veenstra J, Herpers BL, Rozemeijer W, Jansen RR, Bonten MJM, van der Meer JTM. Prediction rules for ruling out endocarditis in patients with Staphylococcus aureus bacteremia. Clin Infect Dis 2021; 74:1442-1449. [PMID: 34272564 PMCID: PMC9049276 DOI: 10.1093/cid/ciab632] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Indexed: 12/04/2022] Open
Abstract
Background Staphylococcus aureus bacteremia (SAB) is in 10% to 20% of cases complicated by infective endocarditis. Clinical prediction scores may select patients with SAB at highest risk for endocarditis, improving the diagnostic process of endocarditis. We compared the accuracy of the Prediction Of Staphylococcus aureus Infective endocarditiseTime to positivity, Iv drug use, Vascular phenomena, preExisting heart condition (POSITIVE), Predicting Risk of Endocarditis Using a Clinical Tool (PREDICT), and VIRSTA scores for classifying the likelihood of endocarditis in patients with SAB. Methods Between August 2017 and September 2019, we enrolled consecutive adult patients with SAB in a prospective cohort study in 7 hospitals in the Netherlands. Using the modified Duke Criteria for definite endocarditis as reference standard, sensitivity, specificity, negative predictive (NPV), and positive predictive values were determined for the POSITIVE, PREDICT, and VIRSTA scores. An NPV of at least 98% was considered safe for excluding endocarditis. Results Of 477 SAB patients enrolled, 33% had community-acquired SAB, 8% had a prosthetic valve, and 11% a cardiac implantable electronic device. Echocardiography was performed in 87% of patients, and 42% received transesophageal echocardiography (TEE). Eighty-seven (18.2%) had definite endocarditis. Sensitivity was 77.6% (65.8%–86.9%), 85.1% (75.8%–91.8%), and 98.9% (95.7%–100%) for the POSITIVE (n = 362), PREDICT, and VIRSTA scores, respectively. NPVs were 92.5% (87.9%–95.8%), 94.5% (90.7%–97.0%), and 99.3% (94.9%–100%). For the POSITIVE, PREDICT, and VIRSTA scores, 44.5%, 50.7%, and 70.9% of patients with SAB, respectively, were classified as at high risk for endocarditis. Conclusions Only the VIRSTA score had an NPV of at least 98%, but at the expense of a high number of patients classified as high risk and thus requiring TEE. Clinical Trials Registration Netherlands Trial Register code 6669.
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Affiliation(s)
- Thomas W van der Vaart
- Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands.,Department of Internal Medicine, Division of Infectious Diseases, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Jan M Prins
- Department of Internal Medicine, Division of Infectious Diseases, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Robin Soetekouw
- Department of Internal Medicine, Spaarne Gasthuis, Haarlem, The Netherlands
| | - Gitte van Twillert
- Department of Internal Medicine, Noordwest Ziekenhuisgroep, Alkmaar, The Netherlands
| | - Jan Veenstra
- Department of Internal Medicine, OLVG, Amsterdam, The Netherlands
| | - Bjorn L Herpers
- Department of Medical Microbiology, Spaarne Gasthuis, Haarlem, The Netherlands
| | - Wouter Rozemeijer
- Department of Medical Microbiology, Noordwest Ziekenhuisgroep, Alkmaar, The Netherlands
| | - Rogier R Jansen
- Department of Medical Microbiology, OLVG, Amsterdam, The Netherlands
| | - Marc J M Bonten
- Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands.,Department of Medical Microbiology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Jan T M van der Meer
- Department of Internal Medicine, Division of Infectious Diseases, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
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23
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Bae HJ, Kim JS, Kim M, Kim YJ, Kim WY. Prognostic Value of the Time-to-Positivity in Blood Cultures from Septic Shock Patients with Bacteremia Receiving Protocol-Driven Resuscitation Bundle Therapy: A Retrospective Cohort Study. Antibiotics (Basel) 2021; 10:antibiotics10060683. [PMID: 34201159 PMCID: PMC8228862 DOI: 10.3390/antibiotics10060683] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2021] [Revised: 05/28/2021] [Accepted: 06/04/2021] [Indexed: 11/27/2022] Open
Abstract
Introduction: To evaluate the prognostic value of the time-to-positivity in patients with culture-positive septic shock. Methods: Retrospective study using a prospective data registry was performed at the emergency department of a tertiary hospital. Consecutive adult patients with septic shock (N = 2499) were enrolled between 2014 and 2018. Bacteremia was defined using blood cultures, and viral and fungal pathogens were excluded. The primary outcome was the 28-day mortality. Results: In 803 (46.7%) septic shock patients with bacteremia, median TTP was 10.1 h. The most prevalent isolated bacterial pathogens were Escherichia coli (40.8%) and Klebsiella (23.4%). Although the TTP correlated with a higher sequential organ failure assessment score (Spearman’s rho = −0.12, p < 0.01), it showed no significant difference between the 28-day survivors and non-survivors (10.2 vs. 9.4 days, p = 0.35). In subgroup analysis of the Escherichia coli and Klebsiella bacteremia cases, a shorter TTP showed prognostic value for predicting the 28-day mortality. The optimal TTP cut-off for Escherichia coli and Klebsiella was 10 h and 8 h, respectively. Conclusions: The prognostic value of the TTP in septic shock patients receiving bundle therapy may be limited and its clinical interpretation should only be made on a pathogen-specific basis.
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Affiliation(s)
| | | | | | | | - Won Young Kim
- Correspondence: ; Tel.: +82-2-3010-3350; Fax: +82-2-3010-3360
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24
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Hamilton F, Evans R, Ghazal P, MacGowan A. Time to positivity in bloodstream infection is not a prognostic marker for mortality: analysis of a prospective multicentre randomized control trial. Clin Microbiol Infect 2021; 28:136.e7-136.e13. [PMID: 34111588 DOI: 10.1016/j.cmi.2021.05.043] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Revised: 05/13/2021] [Accepted: 05/25/2021] [Indexed: 12/15/2022]
Abstract
OBJECTIVES Time to positivity (TTP), calculated automatically in modern blood culture systems, is considered a proxy for microbial load and has been suggested as a potential prognostic marker in bloodstream infections. In this large, multicentre, prospectively collected cohort, our primary analysis aimed to quantify the relationship between the TTP of monomicrobial blood cultures and mortality. METHODS Data from a multicentre randomized controlled trial (RAPIDO) in bloodstream infection were analysed. Bloodstream infections were classified into 13 groups/subgroups. The relationship between mortality and TTP was assessed by logistic regression, adjusted for site, organism, and clinical variables, and linear regression was applied to examine the association between clinical variables and TTP. Robustness was assessed by sensitivity analysis. RESULTS In total 4468 participants were included in the RAPIDO. After exclusions, 3462 were analysed, with the most common organisms being coagulase-negative staphylococci (1072 patients) and Escherichia coli (861 patients); 785 patients (22.7%) died within 28 days. We found no relationship between TTP and mortality for any groups except for streptococci (odds ratio (OR) with each hour 0.98, 95%CI 0.96-1.00) and Candida (OR 1.03, 95%CI 1.00-1.05). There was large variability between organisms and sites in TTP. Fever (geometric mean ratio (GMR) 0.95, 95%CI 0.92-0.99), age (GMR per 10 years 1.01, 95%CI 1.00-1.02), and neutrophilia were associated with TTP (GMR 1.03, 95%CI 1.02-1.04). CONCLUSIONS Time to positivity is not associated with mortality, except in the case of Candida spp. (longer times associated with worse outcomes) and possibly streptococci (shorter times associated with worse outcomes). There was a large variation between median times across centres, limiting external validity.
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Affiliation(s)
- Fergus Hamilton
- Infection Sciences, Pathology, North Bristol NHS Trust, Bristol, UK; Population Health Sciences, University of Bristol, Bristol, UK; Project Sepsis, Cardiff University, Cardiff, UK.
| | - Rebecca Evans
- Bristol Trials Centre, Bristol Medical School, University of Bristol, Bristol, UK.
| | - Peter Ghazal
- Project Sepsis, Cardiff University, Cardiff, UK.
| | - Alasdair MacGowan
- Infection Sciences, Pathology, North Bristol NHS Trust, Bristol, UK.
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25
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Lin J, Zhang Y, Song A, Yang N, Ying L, Dai J. Comparison of a new predictive model with other critical scores for predicting in-hospital mortality among children with pneumonia-related bacteremia. J Investig Med 2021; 69:1339-1343. [PMID: 34083424 DOI: 10.1136/jim-2020-001688] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/18/2021] [Indexed: 11/03/2022]
Abstract
Prediction of mortality in children with pneumonia-related bacteremia is necessary for providing timely care and treatment. This study aims to develop and validate a nomogram and compare it with Pediatric Risk of Mortality III (PRISM III), Brighton Pediatric Early Warning Score (Brighton PEWS) and Pediatric Critical Illness Score (PCIS), which are widely used in predicting in-hospital mortality in children with pneumonia-related bacteremia. This retrospective study collected clinical data of hospitalized children with pneumonia-related bacteremia in Chongqing, China (January 2013-May 2019). The nomogram was built using multivariate logistic regression analysis. The nomogram was compared with PRISM III, PEWS and PCIS in accuracy and clinical benefits in predicting in-hospital mortality in children with pneumonia-related bacteremia. A total of 242 children were included. The nomogram including time to first positivity of blood cultures (TTFP), serum albumin (ALB) and lactate dehydrogenase (LDH) was established. The area under the receiver operating characteristic curve of the nomogram was 0.84 (95% CI 0.77 to 0.91) in the training set and 0.82 (95% CI 0.71 to 0.93) in the validating set. Good consistency was observed between the predictions and the actual observations, and the decision curve analysis showed that the nomogram was clinically useful. The results showed that the nomogram significantly performed better than the three critical scores. In conclusion, a nomogram-illustrated model incorporating TTFP, ALB and LDH for predicting in-hospital mortality in children with pneumonia-related bacteremia at the early stage was established and validated. It performed better than PRISM III, PEWS and PCIS.
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Affiliation(s)
- Jilei Lin
- Department of Respiratory Disease, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders. Chongqing Key Laboratory of Pediatrics, Chongqing, China
| | - Yin Zhang
- Department of Respiratory Disease, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders. Chongqing Key Laboratory of Pediatrics, Chongqing, China
| | - Anchao Song
- School of Public Health and Management, Chongqing Medical University, Chongqing, China
| | - Nan Yang
- Department of Respiratory Disease, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders. Chongqing Key Laboratory of Pediatrics, Chongqing, China
| | - Linyan Ying
- Department of Respiratory Disease, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders. Chongqing Key Laboratory of Pediatrics, Chongqing, China
| | - Jihong Dai
- Department of Respiratory Disease, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders. Chongqing Key Laboratory of Pediatrics, Chongqing, China
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26
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Rasmussen M, Lindberg H, Kahn F. One scoring system does not fit all health care settings. Clin Infect Dis 2021; 74:166-167. [PMID: 33972993 PMCID: PMC8752244 DOI: 10.1093/cid/ciab422] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Magnus Rasmussen
- Skåne University Hospital, Lund, Sweden.,Division of Infection Medicine, Department of Clinical Sciences Lund, Lund University, Lund, Sweden
| | | | - Fredrik Kahn
- Skåne University Hospital, Lund, Sweden.,Division of Infection Medicine, Department of Clinical Sciences Lund, Lund University, Lund, Sweden.,The hospital of Halland, Halmstad, Sweden
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27
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Peinado-Acevedo JS, Hurtado-Guerra JJ, Hincapié-Osorno C, Mesa-Abad J, Uribe-Delgado JR, Giraldo-Ramírez S, Lengerke-Diaz PA, Jaimes F. Reply to Karakonstantis, Zervou, and Rasmussen. Clin Infect Dis 2021; 74:167-168. [PMID: 33972986 DOI: 10.1093/cid/ciab423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Juan Sebastián Peinado-Acevedo
- Departamento de Medicina Interna, Hospital Pablo Tobón Uribe, Medellín, Colombia.,Facultad de Medicina, Universidad de Antioquia, Medellín, Colombia
| | - Juan José Hurtado-Guerra
- Facultad de Medicina, Universidad de Antioquia, Medellín, Colombia.,Departamento de Medicina Interna, Hospital San Vicente Fundación, Rionegro, Colombia
| | - Carolina Hincapié-Osorno
- Facultad de Medicina, Universidad de Antioquia, Medellín, Colombia.,Grupo Académico de Epidemiología Clínica (GRAEPIC), Facultad de Medicina, Universidad de Antioquia, Medellín, Colombia.,Departamento de Cardiología, Hospital Universitario San Vicente Fundación, Medellín, Colombia
| | | | | | - Santiago Giraldo-Ramírez
- Department of Internal Medicine. Division of Hematology and Clinical Oncology, Mayo Clinic, Scottsdale, Arizona, USA
| | | | - Fabián Jaimes
- Facultad de Medicina, Universidad de Antioquia, Medellín, Colombia.,Grupo Académico de Epidemiología Clínica (GRAEPIC), Facultad de Medicina, Universidad de Antioquia, Medellín, Colombia.,Departamento de Cardiología, Hospital Universitario San Vicente Fundación, Medellín, Colombia.,Dirección de Investigaciones, Hospital San Vicente Fundación, Medellín, Colombia
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28
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Short time to blood culture positivity in Enterococcus faecalis infective endocarditis. Eur J Clin Microbiol Infect Dis 2021; 40:1657-1664. [PMID: 33687580 PMCID: PMC8295074 DOI: 10.1007/s10096-021-04210-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Accepted: 02/22/2021] [Indexed: 11/03/2022]
Abstract
Time to blood culture positivity (TTP) is an indirect measure of bacterial concentration in blood. A short TTP has been linked to the presence of infective endocarditis (IE) and to poor prognosis in Staphylococcus aureus bacteremia. We analyze factors influencing TTP in bacteremia with Enterococcus faecalis. This retrospective observational study of medical records included adults diagnosed with monomicrobial E. faecalis bacteremia between 2015 and 2018 in the Skåne region (Sweden). For each episode, the shortest TTP was recorded. Median TTP was compared between patients grouped based on age, sex, comorbidity, site of acquisition, and focus of infection. Using a dichotomized TTP (shorter or longer than 12 h), a multivariable logistic regression for factors associated to TTP was performed. The association between TTP and IE or mortality was evaluated. Three hundred sixty-seven episodes with monomicrobial E. faecalis bacteremia with the corresponding TTP were identified. Median TTP for the entire cohort was 11.6 (IQR 9.9–14.1) h and a significantly shorter TTP was noted for episodes which represented IE (n = 55, 9.4 (IQR 6.4–10.6) h). Only IE remained associated with a short TTP (≤ 12 h) in binary logistic regression analysis. Factors associated with IE were investigated and TTP was associated with IE also when adjusted for age, gender, comorbidity, and nosocomial acquisition. There was no association between TTP and mortality. A low TTP is associated with IE in E. faecalis bacteremia and could be used as a help in determining the need for echocardiography in patients with this condition.
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29
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Kim JS, Kim YJ, Kim WY. Characteristics and clinical outcomes of culture-negative and culture-positive septic shock: a single-center retrospective cohort study. CRITICAL CARE : THE OFFICIAL JOURNAL OF THE CRITICAL CARE FORUM 2021; 25:11. [PMID: 33407768 PMCID: PMC7787242 DOI: 10.1186/s13054-020-03421-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Accepted: 12/02/2020] [Indexed: 12/27/2022]
Abstract
BACKGROUND We evaluated the characteristics and outcomes of culture-negative versus culture-positive septic shock. METHODS We performed a retrospective observational study of data from a prospective registry from 2014 to 2018. A total of 2,499 adult patients with septic shock were enrolled. The primary outcome was 90-day mortality, and the secondary outcomes were the length of hospital stay, a requirement for mechanical ventilation or renal replacement therapy, and in-hospital mortality. RESULTS Of 1,718 patients with septic shock, 1,012 (58.9%) patients were culture-positive (blood 803, urine 302, sputum 102, others 204) and the median pathogen detection time was 9.5 h (aerobic 10.2 h and anaerobic 9.0 h). The most common site of culture-positive infection was the hepatobiliary tract (39.5%), while for the culture-negative it was the lower respiratory tract (38.2%). The culture-negative group had a lower mean body temperature (37.3 vs 37.7 ℃), lactate (2.5 vs. 3.2 mmol/L), C-reactive protein (11.1 vs 11.9 mg/dL), and sequential organ failure assessment score (7.0 vs. 8.0) than that of the culture-positive group. However, 90-day mortality between the groups was not significantly different (32.7 vs 32.2%, p = 0.83), and the other clinical outcomes also did not differ significantly. Moreover, a shorter culture detection time was correlated with a higher sequential organ failure assessment score but not with mortality. CONCLUSION Patients with septic shock are frequently culture-negative, especially in cases where the infection focus is in the lower respiratory tract. Although culture-negative was associated with a degree of organ dysfunction, it was not an independent predictor of death.
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Affiliation(s)
- June-Sung Kim
- Department of Emergency Medicine, University of Ulsan College of Medicine, Asan Medical Center, 88, Olympic-ro 43-gil., Songpa-gu, Seoul, 05505, Korea
| | - Youn-Jung Kim
- Department of Emergency Medicine, University of Ulsan College of Medicine, Asan Medical Center, 88, Olympic-ro 43-gil., Songpa-gu, Seoul, 05505, Korea
| | - Won Young Kim
- Department of Emergency Medicine, University of Ulsan College of Medicine, Asan Medical Center, 88, Olympic-ro 43-gil., Songpa-gu, Seoul, 05505, Korea.
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30
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Mooney C, Eogan M, Ní Áinle F, Cleary B, Gallagher JJ, O'Loughlin J, Drew RJ. Predicting bacteraemia in maternity patients using full blood count parameters: A supervised machine learning algorithm approach. Int J Lab Hematol 2020; 43:609-615. [PMID: 33347714 DOI: 10.1111/ijlh.13434] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2020] [Revised: 11/27/2020] [Accepted: 11/27/2020] [Indexed: 12/16/2022]
Abstract
INTRODUCTION Bacteraemia in pregnancy and the post-partum period can lead to maternal and newborn morbidly. The purpose of this study was to use machine learning tools to identify if bacteraemia in pregnant or post-partum women could be predicted by full blood count (FBC) parameters other than the white cell count. METHODS The study was performed on 129 women with a positive blood culture (BC) for a clinically significant organism, who had a FBC taken at the same time. They were matched with controls who had a negative BC taken at the same time as a FBC. The data were split in to a training (70%) and test (30%) data set. Machine learning techniques such as recursive partitioning and classification and regression trees were used. RESULTS A neutrophil/lymphocyte ratio (NLR) of >20 was found to be the most clinically relevant and interpretable construct of the FBC result to predict bacteraemia. The diagnostic accuracy of NLR >20 to predict bacteraemia was then examined. Thirty-six of the 129 bacteraemia patients had a NLR >20, while only 223 of the 3830 controls had a NLR >20. This gave a sensitivity of 27.9% (95% CI 20.3-36.4), specificity of 94.1% (93.3-94.8), positive predictive value of 13.9% (10.6-17.9) and a negative predictive value (NPV) of 97.4% (97.2-97.7) when the prevalence of bacteraemia was 3%. CONCLUSION The NLR should be considered for use in routine clinical practice when assessing the FBC result in patients with suspected bacteraemia during pregnancy or in the post-partum period.
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Affiliation(s)
- Ciarán Mooney
- Department of Haematolgy, Rotunda Hospital, Dublin, Ireland
| | - Maeve Eogan
- Department of Obstetrics and Gynaecology, Rotunda Hospital, Dublin, Ireland
| | - Fionnuala Ní Áinle
- Department of Haematolgy, Rotunda Hospital, Dublin, Ireland.,Department of Haematology, Mater Misericordiae Hospital, Dublin, Ireland
| | - Brian Cleary
- Department of Pharmacy, Rotunda Hospital, Dublin, Ireland.,Department of Pharmacy, Royal College of Surgeons in Ireland, Dublin, Ireland
| | | | | | - Richard J Drew
- Clinical Innovation Unit, Rotunda Hospital, Dublin, Ireland.,Irish Meningitis and Sepsis Reference Laboratory, Childrens' Health Ireland at Temple Street, Dublin, Ireland.,Department of Clinical Microbiology, Royal College of Surgeons in Ireland, Dublin, Ireland
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31
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Bridwell RE, Larson NP, Birdsong S, Long B, Goss S. Native Mitral Valve Infective Endocarditis From Flossing: A Case Report and Emergency Department Management. Cureus 2020; 12:e12144. [PMID: 33489556 PMCID: PMC7813535 DOI: 10.7759/cureus.12144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Infective endocarditis (IE) is a rare, elusive disease, carrying a 10%-30% mortality. Requiring a high index of suspicion, IE affects damaged native valves and prosthetic valves. While there are a number of inherent risk factors that predispose patients to IE, dental work in the preceding six weeks is often a culprit of disease, colonizing damaged native mitral valves with Streptococcus viridans species. Traditionally, flossing has been suggested to be protective against IE. We present a case of S. gordonii subacute IE on a regurgitant native mitral valve secondary to vigorous flossing.
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32
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Kahn F, Resman F, Bergmark S, Filiptsev P, Nilson B, Gilje P, Rasmussen M. Time to blood culture positivity in Staphylococcus aureus bacteraemia to determine risk of infective endocarditis. Clin Microbiol Infect 2020; 27:1345.e7-1345.e12. [PMID: 33197608 DOI: 10.1016/j.cmi.2020.11.007] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Revised: 10/30/2020] [Accepted: 11/08/2020] [Indexed: 01/04/2023]
Abstract
OBJECTIVES Patients with Staphylococcus aureus bacteraemia (SAB) at risk for infective endocarditis (IE) need to be identified because they should undergo echocardiography. We validated previous scoring systems for IE risk determination and evaluated whether time to blood culture positivity (TTP) could improve scoring systems. METHODS This retrospective population-based study included adults with SAB in 2016 in a derivation cohort and those from 2017 in a validation cohort. TTP was compared between patients with and without IE. A new score including TTP was constructed using a least absolute shrinkage selection operator. The new POSITIVE score was compared to the previously described PREDICT and VIRSTA scores. RESULTS A total of 465 episodes with SAB were included in the derivation cohort, of which 38 (8.2%) represented IE. Median (interquartile range) TTP was significantly shorter in episodes with IE, at 8.7 (7.7-10.6) hours compared to those without, at 13.3 (10.5-16.5) hours. When using a cutoff at 13 hours, TTP had a sensitivity of 100% (95% confidence interval (CI), 91-100) and specificity of 52% (95% CI, 47-57) for IE. The POSITIVE score included TTP, intravenous drug use, embolizations and presence of preexisting heart conditions. It had a sensitivity of 93% (95% CI, 76-99) and a specificity of 70% (95% CI, 66-74) in the validation cohort. The performance of POSITIVE was superior to PREDICT, and the specificity was higher than that of VIRSTA. CONCLUSIONS TTP, either by itself or as part of the POSITIVE score, can be used to identify patients with SAB at low risk for IE. Further validation is needed because TTP is sensitive to several external factors.
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Affiliation(s)
- Fredrik Kahn
- Skåne University Hospital, Sweden; Division of Infection Medicine, Department of Clinical Sciences Lund, Sweden
| | - Fredrik Resman
- Skåne University Hospital, Sweden; Division of Infectious Diseases, Department of Translational Medicine, Lund University, Malmö, Sweden
| | | | | | - Bo Nilson
- Clinical Microbiology, Labmedicine, Region Skåne, Lund, Sweden; Division of Medical Microbiology, Department of Laboratory Medicine, Sweden
| | - Patrik Gilje
- Skåne University Hospital, Sweden; Division of Cardiology, Department of Clinical Sciences, Lund University, Sweden
| | - Magnus Rasmussen
- Skåne University Hospital, Sweden; Division of Infection Medicine, Department of Clinical Sciences Lund, Sweden.
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Cheng J, Zhang G, Li Q, Xu H, Yu Q, Yi Q, Luo S, Li Y, Tian X, Chen D, Luo Z. Time to positivity of Klebsiella pneumoniae in blood culture as prognostic indicator for pediatric bloodstream infections. Eur J Pediatr 2020; 179:1689-1698. [PMID: 32394266 DOI: 10.1007/s00431-020-03675-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Revised: 04/25/2020] [Accepted: 05/01/2020] [Indexed: 10/24/2022]
Abstract
The aim of this study is to explore the prognostic values and optimal cutoff point of time to positivity (TTP) of blood culture in children with Klebsiella pneumoniae (K. pneumoniae) bloodstream infection. Ninety-four children with K. pneumoniae bloodstream infection hospitalized in Children's Hospital of Chongqing Medical University from April 2014 to January 2019 were enrolled retrospectively. TTP and risk factors were determined and analyzed by receiver operating characteristic (ROC) analysis and logistic regression analysis. The standard cutoff point of TTP was 13 h. Patients in early TTP (≤ 13 h) group had significantly higher in-hospital mortality (37.93% vs 6.15%, P = 0.000), higher incidence of septic shock (44.83% vs 6.15%, P = 0.000), higher proportion of PRISM III scores ≥ 10 (48.28% vs 20.00%, P = 0.005), and higher proportion of hypoalbuminemia on admission (44.83% vs 18.46%, P = 0.008). Multivariate analysis indicated PRISM III scores ≥ 10, early TTP, and hypoalbuminemia on admission were independent risk factors of in-hospital mortality (OR 8.36, 95% CI 1.80-38.92, P = 0.007; OR 5.85, 95% CI 1.33-25.61, P = 0.019; OR 5.73, 95% CI 1.30-25.22, P = 0.021, respectively) and septic shock (OR 14.04, 95% CI 2.63-75.38, P = 0.002; OR 11.26, 95% CI 2.10-60.22, P = 0.005; OR 10.27, 95% CI 2.01-52.35, P = 0.005, respectively).Conclusion: Early TTP (TTP ≤ 13 h), PRISM III scores ≥ 10, and hypoalbuminemia on admission appeared to be associated with worse outcomes for K. pneumoniae bloodstream infection children. What is Known: • Klebsiella pneumoniae bloodstream infection is an important cause of infectious disease morbidity and mortality worldwide in children. • Short duration of time to positivity indicated poor clinical outcomes. What is New: • Time to positivity ≤ 13 h, along with PRISM III scores ≥ 10 and hypoalbuminemia on admission, indicated higher in-hospital mortality and incidence of septic shock in Klebsiella pneumoniae bloodstream infection children. • The cut-off point of TTP in this pediatric study was much longer than that reported in adult patients.
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Affiliation(s)
- Jie Cheng
- Chongqing Key Laboratory of Pediatrics, Chongqing, 400014, China.,Department of Children's Hospital of Chongqing Medical University of Education; Ministry of Education Key Laboratory of Child Development and Disorders; National Clinical Research Center for Child Health and Disorders; China International Science and Technology Cooperation base of Child development and Critical Disorders, Children's Hospital of Chongqing Medical University, Chongqing, 400014, China
| | - Guangli Zhang
- Department of Respiratory Medicine, Children's Hospital of Chongqing Medical University, Chongqing, 401122, China
| | - Qingyuan Li
- Chongqing Key Laboratory of Pediatrics, Chongqing, 400014, China.,Department of Children's Hospital of Chongqing Medical University of Education; Ministry of Education Key Laboratory of Child Development and Disorders; National Clinical Research Center for Child Health and Disorders; China International Science and Technology Cooperation base of Child development and Critical Disorders, Children's Hospital of Chongqing Medical University, Chongqing, 400014, China
| | - Huiting Xu
- Chongqing Key Laboratory of Pediatrics, Chongqing, 400014, China.,Department of Children's Hospital of Chongqing Medical University of Education; Ministry of Education Key Laboratory of Child Development and Disorders; National Clinical Research Center for Child Health and Disorders; China International Science and Technology Cooperation base of Child development and Critical Disorders, Children's Hospital of Chongqing Medical University, Chongqing, 400014, China
| | - Qinghong Yu
- Chongqing Key Laboratory of Pediatrics, Chongqing, 400014, China.,Department of Children's Hospital of Chongqing Medical University of Education; Ministry of Education Key Laboratory of Child Development and Disorders; National Clinical Research Center for Child Health and Disorders; China International Science and Technology Cooperation base of Child development and Critical Disorders, Children's Hospital of Chongqing Medical University, Chongqing, 400014, China
| | - Qian Yi
- Chongqing Key Laboratory of Pediatrics, Chongqing, 400014, China.,Department of Children's Hospital of Chongqing Medical University of Education; Ministry of Education Key Laboratory of Child Development and Disorders; National Clinical Research Center for Child Health and Disorders; China International Science and Technology Cooperation base of Child development and Critical Disorders, Children's Hospital of Chongqing Medical University, Chongqing, 400014, China
| | - Siying Luo
- Chongqing Key Laboratory of Pediatrics, Chongqing, 400014, China.,Department of Children's Hospital of Chongqing Medical University of Education; Ministry of Education Key Laboratory of Child Development and Disorders; National Clinical Research Center for Child Health and Disorders; China International Science and Technology Cooperation base of Child development and Critical Disorders, Children's Hospital of Chongqing Medical University, Chongqing, 400014, China
| | - Yuanyuan Li
- Department of Respiratory Medicine, Children's Hospital of Chongqing Medical University, Chongqing, 401122, China
| | - Xiaoyin Tian
- Department of Respiratory Medicine, Children's Hospital of Chongqing Medical University, Chongqing, 401122, China
| | - Dapeng Chen
- Department of Clinical Laboratory Center, Children's Hospital of Chongqing Medical University, Chongqing, 400014, China
| | - Zhengxiu Luo
- Department of Respiratory Medicine, Children's Hospital of Chongqing Medical University, Chongqing, 401122, China.
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Lambregts MMC, Molendijk EBD, Meziyerh S, Schippers EF, Delfos NM, Leendertse M, Bernards AT, Visser LG, Dekkers OM, de Boer MGJ. Early differentiation between uncomplicated and complicated Staphylococcus aureus bacteraemia: Potential value and limitations of a clinical risk score. Int J Clin Pract 2020; 74:e13601. [PMID: 32603544 PMCID: PMC7685114 DOI: 10.1111/ijcp.13601] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Accepted: 06/25/2020] [Indexed: 12/29/2022] Open
Abstract
OBJECTIVE A cornerstone in the management of Staphylococcus aureus bacteraemia (SAB) is the differentiation between a complicated and an uncomplicated SAB course. The ability to early and accurately identify patients with - and without - complicated bacteraemia may optimise the utility of diagnostics and prevent unnecessary prolonged antibiotic therapy. METHODS Development and validation of a prediction score in SAB using demographic, clinical, and laboratory data from two independent Dutch cohorts; estimating the risk of complicated disease at the time of the first positive blood culture. Models were developed using logistic regression and evaluated by c-statistics, ie area under the ROC-curve, and negative predictive values (NPV). RESULTS The development- and validation cohorts included 150 and 183 patients, respectively. The most optimal prediction model included: mean arterial pressure, signs of metastatic infection on physical examination, leucocyte count, urea level and time to positivity of blood cultures (c-statistic 0.82, 95% CI 0.74-0.89). In the validation cohort, the c-statistic of the prediction score was 0,77 (95% CI 0.69-0.84). The NPV for complicated disease for patients with a score of ≤2 was 0.83 (95% CI 0.68-0.92), with a negative likelihood ratio of 0.14 (95% CI 0.06-0.31). CONCLUSION The early SAB risk score helps to identify patients with high probability of uncomplicated SAB. However, the risk score's lacked absolute discriminative power to guide decisions on the management of all patients with SAB on its own. The heterogenicity of the disease and inconsistency in definitions of complicated SAB are important challenges in the development of clinical rules to guide the management of SAB.
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Affiliation(s)
- Merel M. C. Lambregts
- Department of Infectious DiseasesLeiden University Medical CenterLeidenThe Netherlands
| | - Eva B. D. Molendijk
- Department of Infectious DiseasesLeiden University Medical CenterLeidenThe Netherlands
- Department of Internal MedicineAlrijne HospitalLeiderdorpThe Netherlands
| | - Soufian Meziyerh
- Department of Infectious DiseasesLeiden University Medical CenterLeidenThe Netherlands
- Department of Internal MedicineHaga Teaching HospitalDen HaagThe Netherlands
| | - Emile F. Schippers
- Department of Infectious DiseasesLeiden University Medical CenterLeidenThe Netherlands
- Department of Internal MedicineHaga Teaching HospitalDen HaagThe Netherlands
| | - Nathalie M. Delfos
- Department of Internal MedicineAlrijne HospitalLeiderdorpThe Netherlands
| | - Masja Leendertse
- Department of Medical MicrobiologyAlrijne HospitalLeiderdorpThe Netherlands
| | - Alexandra T. Bernards
- Department of Medical MicrobiologyLeiden University Medical CenterLeidenThe Netherlands
| | - Leo G. Visser
- Department of Infectious DiseasesLeiden University Medical CenterLeidenThe Netherlands
| | - Olaf M. Dekkers
- Department of Clinical EpidemiologyLeiden University Medical CenterLeidenThe Netherlands
| | - Mark G. J. de Boer
- Department of Infectious DiseasesLeiden University Medical CenterLeidenThe Netherlands
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Nappi F, Avtaar Singh SS, Timofeeva I. Learning From Controversy: Contemporary Surgical Management of Aortic Valve Endocarditis. CLINICAL MEDICINE INSIGHTS-CARDIOLOGY 2020; 14:1179546820960729. [PMID: 33088184 PMCID: PMC7545763 DOI: 10.1177/1179546820960729] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2020] [Accepted: 08/30/2020] [Indexed: 12/27/2022]
Abstract
Aortic valve replacement is the commonest cardiac surgical operation performed worldwide for infective endocarditis (IE). Long-term durability and avoidance of infection relapse are goals of the procedure. However, no detailed guidelines on prosthesis selection and surgical strategies guided by the comprehensive evaluation of the extension of the infection and its microbiological characteristics, clinical profile of the patient, and risk of infection recurrence are currently available. Conventional mechanical or stented xenografts are the preferred choice for localized aortic infection. However, in cases of complex IE with the involvement of the root or the aortomitral continuity, the use of homograft is suggested according to the surgeon and center experience. Homograft use should be counterbalanced against the risk of structural degeneration. Prosthetic bioroot or prosthetic valved conduit (mechanical and bioprosthetic) are also potentially suitable alternatives. Further development of preservation techniques enabling longer durability of allogenic substitutes is required. We evaluate the current evidence for the use of valve substitutes in aortic valve endocarditis and propose an evidence-based algorithm to guide the choice of therapy. We performed a systemic review to clarify the contemporary surgical management of aortic valve endocarditis.
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Affiliation(s)
- Francesco Nappi
- Department of Cardiac Surgery, Centre Cardiologique du Nord de Saint-Denis, Paris, France
| | - Sanjeet Singh Avtaar Singh
- Department of Cardiac Surgery, Golden Jubilee National Hospital, Glasgow, UK
- Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, UK
| | - Irina Timofeeva
- Department of Imaging, Centre Cardiologique du Nord de Saint-Denis, Paris, France
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De Plato F, Fontana C, Gherardi G, Privitera GP, Puro V, Rigoli R, Viaggi B, Viale P. Collection, transport and storage procedures for blood culture specimens in adult patients: recommendations from a board of Italian experts. Clin Chem Lab Med 2020; 57:1680-1689. [PMID: 31348753 DOI: 10.1515/cclm-2018-1146] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Accepted: 06/24/2019] [Indexed: 12/23/2022]
Abstract
Bloodstream infections (BSIs) remain a potentially life-threatening condition. The gold standard for the diagnosis of BSI is still blood cultures (BCs), and the diagnostic yield depends on clinical and technical factors that have an impact on collection and transportation. Hence, monitoring of the entire pre-analytical process from blood collection to transportation to the microbiology laboratory is critical. To optimize the clinical impact of the diagnostic and therapeutic procedures, a multidisciplinary approach and univocal protocols are mandatory. A board of specialists discussed the available evidence on the pre-analytical process and produced the present document to guide physicians and nurses on the ideal execution of BC: (1) timing and preparation for blood collection; (2) skin antisepsis; (3) blood volume; (4) sampling method and safety; (5) medium to be used; (6) time to BC transportation; and (7) quality assurance and quality management.
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Affiliation(s)
- Francesca De Plato
- Società Italiana Farmacologia Ospedaliera, Milan, Italy; and Local Health Authority ASL of Teramo, Teramo, Italy
| | - Carla Fontana
- Department of Experimental Medicine, University of Rome Tor Vergata, Rome, Italy.,Microbiology and Virology Laboratory, Polyclinic of Tor Vergata, Rome, Italy
| | - Giovanni Gherardi
- Department of Medicine, Laboratory of Clinical Microbiology, University Campus Biomedico, Rome 00128, Italy
| | - Gaetano Pierpaolo Privitera
- Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Pisa, Italy.,University Hygiene and Epidemiology Complex Operative Unit and Clinical Risk Functional Area Coordinator, University Hospital Pisana, Pisa, Italy
| | - Vincenzo Puro
- National Institute for Infectious Diseases L. Spallanzani, IRCCS, Rome, Italy
| | - Roberto Rigoli
- Department of Clinical Pathology, Local Health and Social Care Facility, No. 2, Marca Trevigiana, Treviso, Italy
| | - Bruno Viaggi
- Neuroanesthesia and Intensive Care Unit, Careggi University Hospital, Florence, Italy
| | - Pierluigi Viale
- Department of Medical and Surgical Sciences, Alma Mater Studiorum University of Bologna, Bologna, Italy
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Kuehl R, Morata L, Boeing C, Subirana I, Seifert H, Rieg S, Kern WV, Kim HB, Kim ES, Liao CH, Tilley R, Lopez-Cortés LE, Llewelyn MJ, Fowler VG, Thwaites G, Cisneros JM, Scarborough M, Nsutebu E, Gurgui Ferrer M, Pérez JL, Barlow G, Hopkins S, Ternavasio-de la Vega HG, Török ME, Wilson P, Kaasch AJ, Soriano A. Defining persistent Staphylococcus aureus bacteraemia: secondary analysis of a prospective cohort study. THE LANCET. INFECTIOUS DISEASES 2020; 20:1409-1417. [PMID: 32763194 DOI: 10.1016/s1473-3099(20)30447-3] [Citation(s) in RCA: 62] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Revised: 05/22/2020] [Accepted: 05/27/2020] [Indexed: 10/23/2022]
Abstract
BACKGROUND Staphylococcus aureus persistent bacteraemia is only vaguely defined and the effect of different durations of bacteraemia on mortality is not well established. Our primary aim was to analyse mortality according to duration of bacteraemia and to derive a clinically relevant definition for persistent bacteraemia. METHODS We did a secondary analysis of a prospective observational cohort study at 17 European centres (nine in the UK, six in Spain, and two in Germany), with recruitment between Jan 1, 2013, and April 30, 2015. Adult patients who were consecutively hospitalised with monomicrobial S aureus bacteraemia were included. Patients were excluded if no follow-up blood culture was taken, if the first follow-up blood-culture was after 7 days, or if active antibiotic therapy was started more than 3 days after first blood culture. The primary outcome was 90-day mortality. Univariable and time-dependent multivariable Cox regression analysis were used to assess predictors of mortality. Duration of bacteraemia was defined as bacteraemic days under active antibiotic therapy counting the first day as day 1. FINDINGS Of 1588 individuals assessed for eligibility, 987 were included (median age 65 years [IQR 51-75]; 625 [63%] male). Death within 90 days occurred in 273 (28%) patients. Patients with more than 1 day of bacteraemia (315 [32%]) had higher Charlson comorbidity index and sequential organ failure assessment scores and a longer interval from first symptom to first blood culture. Crude 90-day mortality increased from 22% (148 of 672) with 1 day of bacteraemia, to 39% (85 of 218) with 2-4 days, 43% (30 of 69) with 5-7 days, and 36% (10 of 28) with more than 7 days of bacteraemia. Metastatic infections developed in 39 (6%) of 672 patients with 1 day of bacteraemia versus 40 (13%) of 315 patients if bacteraemia lasted for at least 2 days. The second day of bacteraemia had the highest HR and earliest cutoff significantly associated with mortality (adjusted hazard ratio 1·93, 95% CI 1·51-2·46; p<0·0001). INTERPRETATION We suggest redefining the cutoff duration for persistent bacteraemia as 2 days or more despite active antibiotic therapy. Our results favour follow-up blood cultures after 24 h for early identification of all patients with increased risk of death and metastatic infection. FUNDING None.
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Affiliation(s)
- Richard Kuehl
- Service of Infectious Diseases, Hospital Clínic of Barcelona, Barcelona, Spain; Division of Infectious Diseases and Hospital Epidemiology, University Hospital Basel, Basel, Switzerland
| | - Laura Morata
- Service of Infectious Diseases, Hospital Clínic of Barcelona, Barcelona, Spain
| | - Christian Boeing
- Institute of Medical Microbiology and Hospital Hygiene, Faculty of Medicine, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Isaac Subirana
- CIBER en Epidemiología y Salud Pública, Barcelona, Spain
| | - Harald Seifert
- Institute for Medical Microbiology, Immunology and Hygiene, Faculty of Medicine, University of Cologne, Cologne, Germany; German Center for Infection Research, Partner site Bonn-Cologne, Cologne, Germany
| | - Siegbert Rieg
- Division of Infectious Diseases, Department of Medicine II, Medical Center-University of Freiburg, Freiburg, Germany
| | - Winfried V Kern
- Division of Infectious Diseases, Department of Medicine II, Medical Center-University of Freiburg, Freiburg, Germany
| | - Hong Bin Kim
- Division of Infectious Diseases, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seoul, South Korea
| | - Eu Suk Kim
- Division of Infectious Diseases, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seoul, South Korea
| | - Chun-Hsing Liao
- Infectious Diseases, Department of Internal Medicine, Far Eastern Memorial Hospital, Taipei City, Taiwan
| | - Robert Tilley
- Department of Microbiology, University Hospitals Plymouth NHS Trust, Plymouth, UK
| | - Luis Eduardo Lopez-Cortés
- Infectious Diseases and Clinical Microbiology Unit, Hospital Universitario Virgen Macarena, Sevilla, Spain
| | - Martin J Llewelyn
- Department of Infectious Diseases and Microbiology, Brighton and Sussex University Hospitals NHS Trust, Brighton, UK
| | - Vance G Fowler
- Division of Infectious Diseases and International Health, Department of Medicine, Duke University School of Medicine, Durham, NC, USA
| | - Guy Thwaites
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK
| | - José Miguel Cisneros
- Unidad Clínica de Enfermedades Infecciosas, Microbiología y Medicina Preventiva, Hospital Universitario Virgen del Rocío, CSIC, Universidad de Sevilla, Instituto de Biomedicina de Sevilla, Seville, Spain
| | - Matt Scarborough
- Nuffield Department of Medicine, Oxford University Hospitals NHS Foundation, Oxford, UK
| | - Emmanuel Nsutebu
- Tropical and Infectious Disease Unit, Royal Liverpool University Hospital, Liverpool, UK
| | | | - José L Pérez
- Servicio de Microbiología and Unidad de Investigación, Hospital Universitario Son Espases, Instituto de Investigación Sanitaria Illes Balears, Palma de Mallorca, Spain
| | - Gavin Barlow
- Department of Infection, Hull and East Yorkshire Hospitals NHS Trust, Hull, UK
| | - Susan Hopkins
- Infectious Diseases Unit, Royal Free London NHS Foundation Trust, London, UK
| | | | - M Estée Török
- Department of Medicine, University of Cambridge, Cambridge, UK
| | - Peter Wilson
- Department of Microbiology and Virology, University College London Hospital NHS Foundation Trust, London, UK
| | - Achim J Kaasch
- Institute of Medical Microbiology and Hospital Hygiene, Faculty of Medicine, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Alex Soriano
- Service of Infectious Diseases, Hospital Clínic of Barcelona, Barcelona, Spain.
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Abu Saleh O, Fida M, Asbury K, Narichania A, Sotello D, Bosch W, Vikram HR, Palraj R, Lahr B, Baddour LM, Sohail MR. Prospective Validation of PREDICT and its Impact on the Transesophageal Echocardiography Use in Management of Staphylococcus aureus Bacteremia. Clin Infect Dis 2020; 73:e1745-e1753. [PMID: 32569366 DOI: 10.1093/cid/ciaa844] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2019] [Accepted: 06/18/2020] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND Infective endocarditis (IE) is the most feared complication of Staphylococcus aureus bacteremia (SAB). Transesophageal echocardiogram (TEE) is generally recommended for all patients with SAB, however, supporting data for this are limited. We previously developed a scoring system, "PREDICT", that quantifies the risk of IE and identifies patients who would benefit the most from undergoing TEE. The current prospective investigation aims to validate this score. METHODS We prospectively screened all consecutive adults (≥18 years) hospitalized with SAB at three Mayo Clinic sites between January 2015 and March 2017. RESULTS Of 220 patients screened, 199 with SAB met study criteria and were included in the investigation. Of them, 23 (11.6%) patients were diagnosed with definite IE within 12 weeks of initial presentation based on modified Duke's criteria. Using the previously derived PREDICT model, the day 1 score of ≥4 had a sensitivity of 30.4% and a specificity of 93.8%, whereas day 5 score of ≤2 had a sensitivity and negative predictive value of 100%. Additional factors including surgery or invasive procedure in the past 30 days, prosthetic heart valve, and higher number of positive blood culture bottles in the first set of cultures were associated with increased risk of IE independent of the day 5 risk score. CONCLUSION We validated the previously developed PREDICT scoring tools for stratifying risk of IE, and the need for undergoing a TEE, among cases of SAB. We also identified other factors with predictive potential, although larger prospective studies are needed to further evaluate possible enhancements to the current scoring system.
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Affiliation(s)
- Omar Abu Saleh
- Division of Infectious Diseases, Department of Medicine, Mayo Clinic Rochester, Minnesota
| | - Madiha Fida
- Division of Infectious Diseases, Department of Medicine, Mayo Clinic Rochester, Minnesota
| | - Kara Asbury
- Division of Infectious Diseases, Mayo Clinic Phoenix, Arizona
| | | | - David Sotello
- Division of Infectious Diseases, Mayo Clinic Jacksonville, Florida
| | - Wendelyn Bosch
- Division of Infectious Diseases, Mayo Clinic Jacksonville, Florida
| | | | - Raj Palraj
- Division of Infectious Diseases, Department of Medicine, Mayo Clinic Rochester, Minnesota
| | - Brian Lahr
- Department of Biomedical Statistics and Informatics, Mayo Clinic College of Medicine, Rochester, Minnesota
| | - Larry M Baddour
- Division of Infectious Diseases, Department of Medicine, Mayo Clinic Rochester, Minnesota.,Department of Cardiovascular Diseases, Mayo Clinic, Rochester, Minnesota
| | - M Rizwan Sohail
- Division of Infectious Diseases, Department of Medicine, Mayo Clinic Rochester, Minnesota.,Department of Cardiovascular Diseases, Mayo Clinic, Rochester, Minnesota
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Costa SP, Dias NM, Melo LDR, Azeredo J, Santos SB, Carvalho CM. A novel flow cytometry assay based on bacteriophage-derived proteins for Staphylococcus detection in blood. Sci Rep 2020; 10:6260. [PMID: 32277078 PMCID: PMC7148305 DOI: 10.1038/s41598-020-62533-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Accepted: 12/06/2019] [Indexed: 02/08/2023] Open
Abstract
Bloodstream infections (BSIs) are considered a major cause of death worldwide. Staphylococcus spp. are one of the most BSIs prevalent bacteria, classified as high priority due to the increasing multidrug resistant strains. Thus, a fast, specific and sensitive method for detection of these pathogens is of extreme importance. In this study, we have designed a novel assay for detection of Staphylococcus in blood culture samples, which combines the advantages of a phage endolysin cell wall binding domain (CBD) as a specific probe with the accuracy and high-throughput of flow cytometry techniques. In order to select the biorecognition molecule, three different truncations of the C-terminus of Staphylococcus phage endolysin E-LM12, namely the amidase (AMI), SH3 and amidase+SH3 (AMI_SH3) were cloned fused with a green fluorescent protein. From these, a higher binding efficiency to Staphylococcus cells was observed for AMI_SH3, indicating that the amidase domain possibly contributes to a more efficient binding of the SH3 domain. The novel phage endolysin-based flow cytometry assay provided highly reliable and specific detection of 1-5 CFU of Staphylococcus in 10 mL of spiked blood, after 16 hours of enrichment culture. Overall, the method developed herein presents advantages over the standard BSIs diagnostic methods, potentially contributing to an early and effective treatment of BSIs.
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Affiliation(s)
- Susana P Costa
- Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal
- International Iberian Nanotechnology Laboratory (INL), Av. Mestre José Veiga s/n, 4715-330, Braga, Portugal
| | - Nicolina M Dias
- Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal
| | - Luís D R Melo
- Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal
| | - Joana Azeredo
- Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal
| | - Sílvio B Santos
- Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal
| | - Carla M Carvalho
- Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal.
- International Iberian Nanotechnology Laboratory (INL), Av. Mestre José Veiga s/n, 4715-330, Braga, Portugal.
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40
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Yeh KJ, Husseini JS, Hemke R, Nelson SB, Chang CY. CT-guided discitis-osteomyelitis biopsies with negative microbiology: how many days should we wait before repeating the biopsy? Skeletal Radiol 2020; 49:619-623. [PMID: 31760457 DOI: 10.1007/s00256-019-03344-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Revised: 10/30/2019] [Accepted: 11/10/2019] [Indexed: 02/02/2023]
Abstract
PURPOSE To determine the number of days to positive CT-guided biopsy sample culture in patients with discitis-osteomyelitis. METHODS Our study was IRB approved and HIPAA compliant. All CT-guided biopsies performed for acute discitis-osteomyelitis with positive microbiology between 2002 and 2018 were reviewed. Microbiological organism and days to positive biopsy were documented. Mean, median, skew, and standard deviation were calculated. The proportion of positive cultures that become positive after each day has elapsed was also calculated. RESULTS There were 96 true positive cultures, with 64 (67%) male and 32 (33%) female, ages 57 ± 18 (range 19-87) years. Overall, including all culture results, the mean number of days to positive culture was 2.9 ± 3.5 days. The median number of days was 2, with a positive skew of 2.9. At days 1, 2, 3, 4, and 5, 48%, 68%, 78%, 85%, and 89%, respectively, of biopsy samples had a positive microbiology culture. CONCLUSION Approximately three-quarters of discitis-osteomyelitis pathogens will be identified by biopsy sample culture by 3 days after CT-guided biopsy. This finding should be considered if planning for a repeat biopsy in the setting of a negative microbiology culture.
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Affiliation(s)
- Kaitlyn J Yeh
- Division of Musculoskeletal Imaging and Intervention, Department of Radiology, Massachusetts General Hospital, 55 Fruit Street Yawkey 6E, Boston, MA, 02114, USA
| | - Jad S Husseini
- Division of Musculoskeletal Imaging and Intervention, Department of Radiology, Massachusetts General Hospital, 55 Fruit Street Yawkey 6E, Boston, MA, 02114, USA
| | - Robert Hemke
- Division of Musculoskeletal Imaging and Intervention, Department of Radiology, Massachusetts General Hospital, 55 Fruit Street Yawkey 6E, Boston, MA, 02114, USA
| | - Sandra B Nelson
- Division of Infectious Disease, Department of Medicine, Massachusetts General Hospital, 55 Fruit Street, Boston, MA, 20114, USA
| | - Connie Y Chang
- Division of Musculoskeletal Imaging and Intervention, Department of Radiology, Massachusetts General Hospital, 55 Fruit Street Yawkey 6E, Boston, MA, 02114, USA.
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López-Cortés LE, Gálvez-Acebal J, Rodríguez-Baño J. Therapy of Staphylococcus aureus bacteremia: Evidences and challenges. Enferm Infecc Microbiol Clin 2020; 38:489-497. [PMID: 32169398 DOI: 10.1016/j.eimc.2020.01.018] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Revised: 01/14/2020] [Accepted: 01/17/2020] [Indexed: 10/24/2022]
Abstract
Staphylococcus aureus bacteremia (SAB) is still a daily challenge for clinicians. Despite all efforts, the associated mortality and morbidity has not significantly improved in the last 20 years. The available evidence suggests that adherence to some quality-of-care indicators with regard to clinical management is important in improving the outcome of patients, but it is lower than desired in many hospitals; as such, management of patients with SAB by infectious diseases specialists has been demonstrated to contribute in the reduction of the mortality rate of these patients. In this article, the most relevant clinical studies published over the last few years evaluating the efficacy and safety of alternative drugs for the treatment of SAB are reviewed. However, classic drugs are still used in a high proportion of patients because the promising results obtained from in vivo and in vivo studies with these alternative drugs have not translated as frequently as expected into evident superiority in clinical studies. Nevertheless, some data suggest that certain alternatives may offer advantages in specific situations. Overall, an individualised and expert approach is needed in order to decide the best treatment according to the source, severity, complications, patients' features and microbiological data.
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Affiliation(s)
- Luis Eduardo López-Cortés
- Unidad Clínica de Enfermedades Infecciosas, Microbiología y Medicina Preventiva, Hospital Universitario Virgen Macarena/Departamento de Medicina, Universidad de Sevilla/CSIC/Instituto de Biomedicina de Sevilla (IBiS), Seville, Spain
| | - Juan Gálvez-Acebal
- Unidad Clínica de Enfermedades Infecciosas, Microbiología y Medicina Preventiva, Hospital Universitario Virgen Macarena/Departamento de Medicina, Universidad de Sevilla/CSIC/Instituto de Biomedicina de Sevilla (IBiS), Seville, Spain
| | - Jesús Rodríguez-Baño
- Unidad Clínica de Enfermedades Infecciosas, Microbiología y Medicina Preventiva, Hospital Universitario Virgen Macarena/Departamento de Medicina, Universidad de Sevilla/CSIC/Instituto de Biomedicina de Sevilla (IBiS), Seville, Spain.
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42
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Rodriguez-Noriega E, Morfin-Otero R. All Together Now. INFECTIOUS DISEASES IN CLINICAL PRACTICE 2020. [DOI: 10.1097/ipc.0000000000000830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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43
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Guimaraes AO, Gutierrez J, Maskarinec SA, Cao Y, Hong K, Ruffin F, Carrasco-Triguero M, Peck MC, Fowler VG, Baruch A, Rosenberger CM. Prognostic Power of Pathogen Cell-Free DNA in Staphylococcus aureus Bacteremia. Open Forum Infect Dis 2019; 6:ofz126. [PMID: 31041341 PMCID: PMC6483138 DOI: 10.1093/ofid/ofz126] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Accepted: 03/11/2019] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND Staphylococcus aureus is a leading global cause of bacteremia that can cause invasive tissue infections with high morbidity and mortality despite appropriate antibiotic therapy. Clinicians lack sufficient tools to rapidly identify patients with a poor prognosis to guide diagnostic workup and treatment decisions. Host cell-free DNA provides prognostic value across a spectrum of critical illnesses, including S. aureus bacteremia and sepsis. Metrics of high bacterial load are associated with disease severity in S. aureus bacteremia, and the objective of this study was to evaluate whether incorporating quantitation of cell-free bacterial DNA would provide additive prognostic value when combined with biomarkers of the inflammatory response. METHODS S. aureus cell-free DNA was measured by quantitative polymerase chain reaction (PCR) in baseline serum samples from an observational cohort of 111 patients with complicated S. aureus bacteremia and correlated with host inflammatory markers and clinical outcomes. RESULTS High levels of S. aureus cell-free DNA at the time of positive index blood culture were prognostic for all-cause and attributable mortality and persistent bacteremia and were associated with infective endocarditis. However, they did not provide additive value to biomarkers of the host response to infection in multivariate analysis. CONCLUSIONS Measurements of bacterial load by PCR are a clinically feasible candidate biomarker for stratifying patients at higher risk for complications and poor outcomes. Their diagnostic and prognostic value for identifying foci of infection and influencing treatment remain to be evaluated in additional cohorts.
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Affiliation(s)
| | - Johnny Gutierrez
- Biomarker Development, Genentech, Inc., South San Francisco, California
| | - Stacey A Maskarinec
- Division of Infectious Diseases, Duke University Division of Infectious Diseases, Durham, North Carolina
| | - Yi Cao
- Bioinformatics and Computational Biology, Genentech, Inc., South San Francisco, California
| | - Kyu Hong
- Bioanalytical Sciences, Genentech, Inc., South San Francisco, California
| | - Felicia Ruffin
- Division of Infectious Diseases, Duke University Division of Infectious Diseases, Durham, North Carolina
| | | | - Melicent C Peck
- Clinical Sciences, Genentech, Inc., South San Francisco, California
| | - Vance G Fowler
- Division of Infectious Diseases, Duke University Division of Infectious Diseases, Durham, North Carolina
| | - Amos Baruch
- Biomarker Development, Genentech, Inc., South San Francisco, California
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