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Bloodstream infection detection

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https://www.readbyqxmd.com/read/29450193/a-method-for-quantification-of-epithelium-colonization-capacity-by-pathogenic-bacteria
#1
Rune M Pedersen, Rasmus B Grønnemose, Kristian Stærk, Cecilie A Asferg, Thea B Andersen, Hans J Kolmos, Jakob Møller-Jensen, Thomas E Andersen
Most bacterial infections initiate at the mucosal epithelium lining the gastrointestinal, respiratory, and urogenital tracts. At these sites, bacterial pathogens must adhere and increase in numbers to effectively breach the outer barrier and invade the host. If the bacterium succeeds in reaching the bloodstream, effective dissemination again requires that bacteria in the blood, reestablish contact to distant endothelium sites and form secondary site foci. The infectious potential of bacteria is therefore closely linked to their ability to adhere to, colonize, and invade epithelial and endothelial surfaces...
2018: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/29447988/escmid-study-group-for-infections-in-compromised-hosts-esgich-consensus-document-on-the-safety-of-targeted-and-biological-therapies-an-infectious-diseases-perspective-agents-targeting-lymphoid-cells-surface-antigens-i-cd19-cd20-and-cd52
#2
REVIEW
Małgorzata Mikulska, Simone Lanini, Carlota Gudiol, Lubos Drgona, Giuseppe Ippolito, Mario Fernández-Ruiz, Bernd Salzberger
BACKGROUND: The present review is part of the ESCMID Study Group for Infections in Compromised Hosts (ESGICH) Consensus Document on the safety of targeted and biological therapies. AIMS: To review, from an Infectious Diseases perspective, the safety profile of agents targeting CD19, CD20 and CD52 and to suggest preventive recommendations. SOURCES: Computer-based MEDLINE searches with MeSH terms pertaining to each agent or therapeutic family...
February 12, 2018: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/29446842/epidemiology-and-risk-factors-for-outpatient-acquired-catheter-related-bloodstream-infections-in-children-receiving-home-parenteral-nutrition
#3
Laura J Wozniak, Hannah M Bechtold, Laurie E Reyen, Alvin P Chan, Elizabeth A Marcus, Jorge H Vargas
BACKGROUND: Few studies have examined the epidemiology and risk factors for the development of outpatient-acquired catheter-related bloodstream infections (CRBSIs) in children receiving home parenteral nutrition. This study aimed to (1) characterize the incidence, clinical presentation, and epidemiology of CRBSIs and (2) identify risk factors for CRBSIs in children receiving home parenteral nutrition. METHODS: A longitudinal database approved by our Institutional Review Board was created to prospectively track CRBSIs in the UCLA pediatric population from January to December 2012...
February 15, 2018: JPEN. Journal of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/29438475/detecting-infections-rapidly-and-easily-for-candidemia-trial-part-2-direct2-a-prospective-multicenter-study-of-the-t2candida-panel
#4
Cornelius J Clancy, Peter G Pappas, Jose Vazquez, Marc A Judson, Dimitrios P Kontoyiannis, George R Thompson, Kevin W Garey, Annette Reboli, Richard N Greenberg, Senu Apewokin, G Marshall Lyon, Luis Ostrosky-Zeichner, Alan H B Wu, Ellis Tobin, M Hong Nguyen, Angela M Caliendo
Background: Blood cultures are approximately 50% sensitive for diagnosing invasive candidiasis. The T2Candida nanodiagnostic panel uses T2 magnetic resonance and a dedicated instrument to detect Candida directly within whole blood samples. Methods: Patients with Candida albicans, Candida glabrata, Candida parapsilosis, Candida tropicalis, or Candida krusei candidemia were identified at 14 centers using diagnostic blood cultures (dBCs). Follow-up blood samples were collected concurrently for testing by T2Candida and companion cultures (cBCs)...
February 9, 2018: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29434070/direct-identification-by-matrix-assisted-laser-desorption-ionization-time-of-flight-mass-spectrometry-maldi-tof-ms-from-positive-blood-culture-bottles-an-opportunity-to-customize-growth-conditions-for-fastidious-organisms-causing-bloodstream-infections
#5
Megha Sharma, Vikas Gautam, Monika Mahajan, Sudesh Rana, Manasi Majumdar, Pallab Ray
Culture-negative bacteraemia has been an enigmatic entity with respect to its aetiological agents. In an attempt to actively identify those positive blood cultures that escape isolation and detection on routine workflow, an additional step of MALDI-TOF MS (matrix-assisted laser desorption ionization-time of flight mass spectrometry) based detection was carried out directly from the flagged blood culture bottles. Blood samples from 200 blood culture bottles that beeped positive with automated (BACTEC) system and showed no growth of organism on routine culture media, were subjected to analysis by MALDI-TOF MS...
October 2017: Indian Journal of Medical Research
https://www.readbyqxmd.com/read/29427440/investigation-of-pumping-mechanism-for-non-newtonian-blood-flow-with-ac-electrothermal-forces-in-a-microchannel-by-hybrid-boundary-element-method-and-immersed-boundary-lattice-boltzmann-method
#6
Qinlong Ren
Efficient pumping of blood flow in a microfluidic device is essential for rapid detection of bacterial bloodstream infections (BSI) using alternating current (AC) electrokinetics. Compared with AC electroosmosis (ACEO) phenomenon, the advantage of AC electrothermal (ACET) mechanism is its capability of pumping biofluids with high electrical conductivities at a relatively high AC voltage frequency. In the current work, the microfluidic pumping of non-Newtonian blood flow using ACET forces is investigated in detail by modeling its multi-physics process with hybrid boundary element method (BEM) and immersed boundary-lattice Boltzmann method (IB-LBM)...
February 10, 2018: Electrophoresis
https://www.readbyqxmd.com/read/29419698/next-generation-sequencing-diagnostics-of-bacteremia-in-sepsis-next-genesis-trial-study-protocol-of-a-prospective-observational-noninterventional-multicenter-clinical-trial
#7
MULTICENTER STUDY
Thorsten Brenner, Sebastian O Decker, Silke Grumaz, Philip Stevens, Thomas Bruckner, Thomas Schmoch, Mathias W Pletz, Hendrik Bracht, Stefan Hofer, Gernot Marx, Markus A Weigand, Kai Sohn
BACKGROUND: Sepsis remains a major challenge, even in modern intensive care medicine. The identification of the causative pathogen is crucial for an early optimization of the antimicrobial treatment regime. In this context, culture-based diagnostic procedures (e.g., blood cultures) represent the standard of care, although they are associated with relevant limitations. Accordingly, culture-independent molecular diagnostic procedures might be of help for the identification of the causative pathogen in infected patients...
February 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29408951/malaria-coinfections-in-febrile-pediatric-inpatients-a-hospital-based-study-from-ghana
#8
Benedikt Hogan, Daniel Eibach, Ralf Krumkamp, Nimako Sarpong, Denise Dekker, Benno Kreuels, Oumou Maiga-Ascofaré, Kennedy Gyau Boahen, Charity Wiafe Akenten, Yaw Adu-Sarkodie, Ellis Owusu-Dabo, Jürgen May
Background: The epidemiology of pediatric febrile illness is shifting in sub-Saharan Africa, but malaria remains a major cause of childhood morbidity and mortality. The present study describes causes of febrile illness in hospitalized children in Ghana and aims to determine the burden of malaria coinfections and their association with parasite densities. Methods: In a prospective study, children (aged ≥30 days and ≤15 years) with fever ≥38.0°C were recruited after admission to the pediatric ward of a primary hospital in Ghana...
February 2, 2018: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29406376/blood-cultures-drawn-from-arterial-catheters-are-reliable-for-the-detection-of-bloodstream-infection-in-critically-ill-children
#9
Itay Berger, Merav Gil Margolis, Elhanan Nahum, Ovdi Dagan, Itzhak Levy, Eytan Kaplan, Eran Shostak, Esther Shmuelov, Ofer Schiller, Gili Kadmon
OBJECTIVES: Arterial catheters may serve as an additional source for blood cultures in children when peripheral venipuncture is challenging. The aim of the study was to evaluate the accuracy of cultures obtained through indwelling arterial catheters for the diagnosis of bloodstream infections in critically ill pediatric patients. DESIGN: Observational and comparative. SETTING: General and cardiac ICUs of a tertiary, university-affiliated pediatric medical center...
February 5, 2018: Pediatric Critical Care Medicine
https://www.readbyqxmd.com/read/29403213/risk-factors-for-intestinal-colonization-with-vancomycin-resistant-enterococci-a-prospective-study-in-a-level-iii-pediatric-intensive-care-unit
#10
Rajesh Amberpet, Sujatha Sistla, Subhash Chandra Parija, Ramachandran Rameshkumar
PURPOSE: Vancomycin-resistant enterococci (VRE) emerged as one of the major nosocomial pathogens across the globe. Gut colonization rate with VRE is higher in patients admitted to intensive care units (ICUs) due to the higher antibiotic pressure. VRE colonization increases the risk of developing infection up to 5-10 folds. The aim of this study was to determine the rates of VRE colonization among the patients admitted to pediatric ICU (PICU) and risk factors associated with it. MATERIALS AND METHODS: Rectal swabs were collected after 48 h of admission to PICU from 198 patients...
January 2018: Journal of Laboratory Physicians
https://www.readbyqxmd.com/read/29343540/point-counterpoint-meningitis-encephalitis-syndromic-testing-in-the-clinical-laboratory
#11
Jennifer Dien Bard, Kevin Alby
"I'm not telling you it's going to be easy. I'm telling you it's going to be worth it"- Art WilliamsFor the most part, syndromic testing by multiplex molecular panels has been a welcome addition to the diagnostic laboratory. The first three panels available addressed syndromes associated with upper respiratory tract infections, bloodstream infections and gastroenteritis, with adoption of the first two panels being the most widespread. Multiple studies have been published on the performance characteristics of these syndromic panels as well as the impact on turn-around-time (TAT), increased pathogen detection, and antimicrobial use...
January 17, 2018: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/29343037/-mechanisms-of-fosfomycin-resistance-of-extended-spectrum-%C3%AE-lactamases-producing-escherichia-coli-and-klebsiella-pneumoniae
#12
Y J Xu, J J Quan, K R Shi, Y S Yu
Objective: To study the in vitro activity of fosfomycin to extended-spectrum β-lactamases (ESBLs)-producing Escherichia coli and Klebsiella pneumoniae and to explore the mechanisms of fosfomycin resistance. Methods: A total of 1 052 ESBLs-producing E. coli(ESBL-EC) and K. pneumoniae(ESBL-KP) isolates were collected from bloodstream infections of 28 hospitals of 22 provinces and municipalities, which were stored by our laboratory.Minimum inhibitory concentrations (MICs) of fosfomycin against these clinical isolates were determined by agar dilution methods according to the Clinical and Laboratory Standards Institute (CLSI)(2015)...
January 9, 2018: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/29338786/a-systematic-review-of-transfusion-transmitted-malaria-in-non-endemic-areas
#13
Federica Verra, Andrea Angheben, Elisa Martello, Giovanni Giorli, Francesca Perandin, Zeno Bisoffi
BACKGROUND: Transfusion-transmitted malaria (TTM) is an accidental Plasmodium infection caused by whole blood or a blood component transfusion from a malaria infected donor to a recipient. Infected blood transfusions directly release malaria parasites in the recipient's bloodstream triggering the development of high risk complications, and potentially leading to a fatal outcome especially in individuals with no previous exposure to malaria or in immuno-compromised patients. A systematic review was conducted on TTM case reports in non-endemic areas to describe the epidemiological characteristics of blood donors and recipients...
January 16, 2018: Malaria Journal
https://www.readbyqxmd.com/read/29332591/anti-trypanosoma-cruzi-activity-in-vitro-of-phases-and-isolated-compounds-from-excoecaria-lucida-leaves
#14
Cristiane Franca da Silva, Ania Ochoa Pacheco, Rayane Nogueira Alves, Josean Fechine Tavares, Marcelo Sobral da Silva, Julio Cesar Escalona Arranz
BACKGROUND: Chagas disease is caused by the protozoan parasite Trypanosoma cruzi. This illness is found mainly in 21 Latin American countries and an estimated 8 million people are infected worldwide. The unsatisfactory chemotherapy provokes severe toxicity and resistant strains. Medicinal plants constitute a promising source of new drugs and remedies against all kinds of disorders, mainly infectious diseases arousing interest worldwide. OBJECTIVE: The aim of this study has been the isolation, structural identification and evaluation of the trypanocidal activity of samples present in the Excoecaria lucida Sw...
January 11, 2018: Medicinal Chemistry
https://www.readbyqxmd.com/read/29324651/incidence-microbiological-profile-and-risk-factors-of-healthcare-associated-infections-in-intensive-care-units-a-10-year-observation-in-a-provincial-hospital-in-southern-poland
#15
Małgorzata Kołpa, Marta Wałaszek, Agnieszka Gniadek, Zdzisław Wolak, Wiesław Dobroś
Healthcare-associated infections (HAIs) occurring in patients treated in an intensive care unit (ICU) are serious complications in the treatment process. Aetiological factors of these infections can have an impact on treatment effects, treatment duration and mortality. The aim of the study was to determine the prevalence and microbiological profile of HAIs in patients hospitalized in an ICU over a span of 10 years. The active surveillance method was used to detect HAIs in adult patients who spent over 48 h in a general ICU ward located in southern Poland between 2007 and 2016...
January 11, 2018: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29305548/epidemiology-clinical-characteristics-and-antimicrobial-susceptibility-profiles-of-human-clinical-isolates-of-staphylococcus-intermedius-group
#16
Melanie L Yarbrough, William Lainhart, C A Burnham
The veterinary pathogens in Staphylococcus intermedius group (SIG) are increasingly recognized as causes of human infection. Shared features between SIG and Staphylococcus aureus may result in misidentification of SIG in human clinical cultures. This study examined the clinical and microbiological characteristics of isolates recovered at a tertiary care academic medical center. From 2013 to 2015, 81 SIG isolates were recovered from 62 patients. Patients were commonly ≥ 50 years old, diabetic, or immunocompromised...
January 5, 2018: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/29258920/optimization-of-antimicrobial-therapy-in-vancomycin-resistant-enterococcal-bacteraemia-using-a-rapid-detection-gram-positive-blood-culture-assay
#17
R Nakagawa, R Jain, A B Bryan, J D Chan
Rapid molecular blood culture Gram-positive (BC-GP) assay can promptly identify vancomycin-resistant enterococcal (VRE) bloodstream infections (BSIs). We sought to evaluate patients with VRE BSI following the pre (N = 44) and post (N = 20) implementation of Verigene BC-GP assay. The average time to detection of VRE was 25.9 ± 4.1h (95% confidence interval (CI): 17.6-34.1; P < 0.001) earlier with Verigene BC-GP assay. Compared to patients in the pre-Verigene BC-GP period, the mean adjusted difference in time to administration of anti-VRE therapy was 18...
December 16, 2017: Journal of Hospital Infection
https://www.readbyqxmd.com/read/29244831/antimicrobial-susceptibility-and-molecular-epidemiology-of-clinical-enterobacter-cloacae-bloodstream-isolates-in-shanghai-china
#18
Su Wang, Shu-Zhen Xiao, Fei-Fei Gu, Jin Tang, Xiao-Kui Guo, Yu-Xing Ni, Jie-Ming Qu, Li-Zhong Han
BACKGROUND: Enterobacter cloacae is a major nosocomial pathogen causing bloodstream infections. We retrospectively conducted a study to assess antimicrobial susceptibility and phylogenetic relationships of E. cloacae bloodstream isolates in two tertiary university-affiliated hospitals in Shanghai, in order to facilitate managements of E. cloacae bloodstream infections and highlight some unknowns for future prevention. METHODS: Fifty-three non-duplicate E. cloacae bloodstream isolates were consecutively collected from 2013 to 2016...
2017: PloS One
https://www.readbyqxmd.com/read/29237206/-piperacillin-tazobactam-shortage-central-restriction-and-alternative-recommendations-as-effective-antibiotic-stewardship-intervention-at-a-maximal-care-hospital
#19
Johanna Kessel, Barbara Dolff, Thomas Wichelhaus, Nils Keiner, Michael Hogardt, Claudia Reinheimer, Imke Wieters, Sebastian Harder, Volkhard A J Kempf, Christoph Stephan
Background Drug supply bottleneck is a worldwide challenge, e. g. the antibiotics Piperacillin/Tazobactam shortage in 2016/2017. The efficacy of an appropriate replacement management was evaluated at the University Hospital Frankfurt (UHF). Methods The Antibiotic-Stewardship (ABS)-Team at UHF decreed a restriction of PIP/TAZ and provided alternative antibiotic therapy recommendations during the shortage period. Consequences of this intervention on antibiotic consumption and overall costs were investigated...
December 13, 2017: Deutsche Medizinische Wochenschrift
https://www.readbyqxmd.com/read/29235843/self-sterilizing-and-regeneratable-microchip-for-the-precise-capture-and-recovery-of-viable-circulating-tumor-cells-from-patients-with-cancer
#20
Lanlan Hui, Yi Su, Tingting Ye, Zhao Liu, Qingchang Tian, Chuanjiang He, Yueqi Zhao, Pu Chen, Xiaojia Wang, Weidong Han, Yan Luo, Ben Wang
Cancer cells metastasize and are transported in the bloodstream, easily reaching any site in the body through the blood circulation. A method designed to assess the number of circulating tumor cells (CTCs) should be validated as a clinical tool for predicting the response to therapy and monitoring disease progression in patients with cancer. Although CTCs are detectable in many cases, they remain unavailable for clinic usage due to their high testing cost, tedious operation and poor clinical relevance. Herein, we developed a regeneratable microchip for isolating CTCs that is available for robust cell heterogeneity assays on-site without the need for a sterile environment...
December 13, 2017: ACS Applied Materials & Interfaces
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