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Bloodstream infection detection

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https://www.readbyqxmd.com/read/27899074/antibiotic-resistance-and-clonal-diversity-of-invasive-staphylococcus-aureus-in-the-rural-ashanti-region-ghana
#1
Denise Dekker, Manuel Wolters, Eva Mertens, Kennedy Gyau Boahen, Ralf Krumkamp, Daniel Eibach, Norbert G Schwarz, Yaw Adu-Sarkodie, Holger Rohde, Martin Christner, Florian Marks, Nimako Sarpong, Jürgen May
BACKGROUND: Staphylococcus aureus is among the most common pathogens isolated from blood cultures in Ghana; yet the epidemiology of blood infections in rural settings is poorly described. This study aims to investigate antimicrobial susceptibility and clonal diversity of S. aureus causing bloodstream infections in two hospitals in the Ashanti Region, Ghana. METHODS: Blood cultures were performed for all febrile patients (≥37.5 °C) on hospital admission. Antibiotic susceptibility testing for S...
November 29, 2016: BMC Infectious Diseases
https://www.readbyqxmd.com/read/27890455/the-detection-of-microbial-dna-but-not-cultured-bacteria-is-associated-with-increased-mortality-in-patients-with-suspected-sepsis-a-prospective-multi-centre-european-observational-study
#2
Michael J O'Dwyer, Malgorzata H Starczewska, Jacques Schrenzel, Kai Zacharowski, David Ecker, Rangarajan Sampath, David Brealey, Mervyn Singer, Nicolas Libert, Mark Wilks, Jean-Louis Vincent
OBJECTIVES: Blood culture results inadequately stratify the mortality risk in critically ill patients with sepsis. We sought to establish the prognostic significance of the presence of microbial DNA in the bloodstream of patients hospitalised with suspected sepsis. METHODS: We analysed the data collected during the Rapid Diagnosis of Infections in the Critically Ill (RADICAL) study which compared a novel culture-independent polymerase chain reaction/electrospray ionization-mass spectrometry (PCR/ESI-MS) assay with standard microbiological testing...
November 23, 2016: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/27889413/molecular-diagnosis-of-bloodstream-infections-in-onco-haematology-patients-with-pcr-esi-ms-technology
#3
Elena Jordana-Lluch, Belén Rivaya, Clara Marcó, Montserrat Giménez, Ma Dolores Quesada, Agustín Escobedo, Montserrat Batlle, Elisa Martró, Vicente Ausina
OBJECTIVES: Onco-haematological patients are prone to develop infections, and antibiotic prophylaxis may lead to negative blood cultures. Thus, the microbiological diagnosis and subsequent administration of a targeted antimicrobial therapy is often difficult. The goal of this study was to evaluate the usefulness of IRIDICA (PCR/ESI-MS technology) for the molecular diagnosis of bloodstream infections in this patient group. METHODS: A total of 463 whole blood specimens from different sepsis episodes in 429 patients were analysed using the PCR/ESI-MS platform, comparing the results with those of blood culture and other clinically relevant information...
November 23, 2016: Journal of Infection
https://www.readbyqxmd.com/read/27886039/use-of-personal-digital-assistants-to-detect-healthcare-associated-infections-in-a-neonatal-intensive-care-unit-in-egypt
#4
Elham Am El-Feky, Doa'a A Saleh, Jehan El-Kholy, Ahmed Mahmoud Sayed, Yasmeen Mansi, Mohamed Hashem
INTRODUCTION: Personal digital assistants (PDAs) used in electronic laboratory-based surveillance are a promising alternative to conventional surveillance to detect healthcare-associated infections (HAIs). The aim of the study was to monitor, detect, and analyze HAIs using PDAs in a neonatal intensive care unit (NICU). METHODOLOGY: In this descriptive study, 1,053 neonates admitted to the NICU in the obstetrics and gynecology ward at the Cairo University hospital were included and evaluated for HAIs by collecting data using PDAs programmed by Naval Medical Research Unit 3, Cairo, with the definitions for HAIs provided by the National Healthcare Safety Network of the Centers for Disease Control and Prevention...
November 24, 2016: Journal of Infection in Developing Countries
https://www.readbyqxmd.com/read/27866368/does-serum-procalcitonin-aid-in-the-diagnosis-of-bloodstream-infection-regardless-of-whether-patients-exhibit-the-systemic-inflammatory-response-syndrome
#5
Rashi Arora, James P Campbell, Gyorgy Simon, Nishant Sahni
BACKGROUND: Physicians frequently rely on the systemic inflammatory response syndrome (SIRS) criteria to detect bloodstream infections (BSIs). We evaluated the diagnostic performance of procalcitonin (PCT) in detecting BSI in patients with and without SIRS. METHODS: We tested the association between BSI, serum PCT levels, contemporaneous SIRS scores and serum lactate using logistic regression in a dataset of 4279 patients. The diagnostic performance of these variables was assessed...
November 19, 2016: Infection
https://www.readbyqxmd.com/read/27861552/pathoadaptive-mutations-of-escherichia-coli-k1-in-experimental-neonatal-systemic-infection
#6
Alex J McCarthy, David Negus, Patricia Martin, Catarina Pechincha, Eric Oswald, Richard A Stabler, Peter W Taylor
Although Escherichia coli K1 strains are benign commensals in adults, their acquisition at birth by the newborn may result in life-threatening systemic infections, most commonly sepsis and meningitis. Key features of these infections, including stable gastrointestinal (GI) colonization and age-dependent invasion of the bloodstream, can be replicated in the neonatal rat. We previously increased the capacity of a septicemia isolate of E. coli K1 to elicit systemic infection following colonization of the small intestine by serial passage through two-day-old (P2) rat pups...
2016: PloS One
https://www.readbyqxmd.com/read/27795467/bloodstream-infection-due-to-ctx-m-15-and-tem-1-extended-spectrum-%C3%AE-lactamase-producing-salmonella-enterica-serovar-virchow-st16
#7
Jeong-Hwan Hwang, Gee-Wook Shin, Joo-Hee Hwang, Chang-Seop Lee
A 57-year-old man presented with a high fever and diarrhea. A blood culture showed the presence of a Group C nontyphoidal Salmonella isolate. On Salmonella serotyping, the isolate was Salmonella enterica serovar Virchow. Its sequence type was determined to be ST16 by sequence analysis of seven different housekeeping genes. The blaCTX-M group 1 and blaTEM genes were amplified by multiplex PCR assays for detecting ESBL genes. Sequences of both amplicons were respectively identical to CTX-M-15- and TEM-1-encoding genes...
October 31, 2016: Japanese Journal of Infectious Diseases
https://www.readbyqxmd.com/read/27777984/molecular-epidemiology-of-colonizing-and-infecting-isolates-of-klebsiella-pneumoniae
#8
Rebekah M Martin, Jie Cao, Sylvain Brisse, Virginie Passet, Weisheng Wu, Lili Zhao, Preeti N Malani, Krishna Rao, Michael A Bachman
Klebsiella pneumoniae is among the most common causes of hospital-acquired infections and has emerged as an urgent threat to public health due to carbapenem antimicrobial resistance. K. pneumoniae commonly colonizes hospitalized patients and causes extraintestinal infections such as urinary tract infection, bloodstream infection (septicemia), and pneumonia. If colonization is an intermediate step before infection, then detection and characterization of colonizing isolates could enable strategies to prevent or empirically treat K...
September 2016: MSphere
https://www.readbyqxmd.com/read/27765617/a-rapid-highly-sensitive-and-culture-free-detection-of-pathogens-from-blood-by-positive-enrichment
#9
Manjula Ramya Vutukuru, Divya Khandige Sharma, M S Ragavendar, Susanne Schmolke, Yiwei Huang, Walter Gumbrecht, Nivedita Mitra
Molecular diagnostics is a promising alternative to culture based methods for the detection of bloodstream infections, notably due to its overall lower turnaround time when starting directly from patient samples. Whole blood is usually the starting diagnostic sample in suspected bloodstream infections. The detection of low concentrations of pathogens in blood using a molecular assay necessitates a fairly high starting volume of blood sample in the range of 5-10mL. This large volume of blood sample has a substantial accompanying human genomic content that interferes with pathogen detection...
October 17, 2016: Journal of Microbiological Methods
https://www.readbyqxmd.com/read/27761798/colonisation-with-extended-spectrum-beta-lactamase-esbl-not-detected-in-a-prevalence-study
#10
C O'Connor, M G Kiernan, C Finnegan, J Powell, L Power, N H O'Connell, C P Dunne
BACKGROUND: The Mid-West of Ireland has higher than average national rates of invasive extended-spectrum beta-lactamase (ESBL) bloodstream infections and carbapenemase-producing Enterobacteriaceae (CPE), with increasing numbers of ESBL isolates detected in community-dwelling patients. AIMS: To conduct a point prevalence study in a convenience sample of the Mid-West population with the aim of determining the extent of ESBL colonisation. METHODS: Utilising anonymised community stool samples that had completed routine analysis, we conducted a point prevalence study over a 4-week period on all samples that met defined inclusion and exclusion criteria...
September 24, 2016: Irish Journal of Medical Science
https://www.readbyqxmd.com/read/27756240/pseudobacteremia-outbreak-of-biofilm-forming-achromobacter-xylosoxidans-environmental-transmission
#11
Frank Günther, Uta Merle, Uwe Frank, Matthias M Gaida, Nico T Mutters
BACKGROUND: Achromobacter xylosoxidans (AX) is known for intrinsic resistance to disinfectants. Our laboratory routine surveillance system detected an unexpected rise in AX bloodstream infections in a 2200-bed hospital. An epidemiological investigation was conducted to find the source and disrupt further transmission. METHODS: Outbreak cases were defined as patients with at least one positive blood culture positive for AX from May 2014 to May 2015. Medical records were reviewed, affected wards, as well as the microbiology laboratory were audited...
October 19, 2016: BMC Infectious Diseases
https://www.readbyqxmd.com/read/27750157/nosocomial-outbreak-of-extended-spectrum-%C3%AE-lactamase-producing-enterobacter-ludwigii-co-harbouring-ctx-m-8-shv-12-and-tem-15-in-a-neonatal-intensive-care-unit-in-venezuela
#12
Ana Flores-Carrero, Indira Labrador, Alberto Paniz-Mondolfi, David R Peaper, Dana Towle, María Araque
Enterobacter spp. have emerged as an important group of pathogens linked to outbreaks in neonatal intensive care units (NICUs), usually involving strains expressing extended-spectrum β-lactamases (ESBLs). The aim of this study was to describe the first nosocomial bloodstream infection outbreak caused by Enterobacter ludwigii co-harbouring CTX-M-8, SHV-12 and TEM-15 in a NICU in a Venezuelan hospital. Initial bacterial identification was achieved by VITEK(®)2 system and matrix-assisted laser desorption/ionisation time-of-flight mass spectrometry (VITEK(®) MS) and was subsequently confirmed by nucleotide sequencing of the 16S rDNA gene and hsp60 genotyping...
December 2016: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/27726765/bloodstream-infections
#13
Raquel M Martinez, Donna M Wolk
Bacteremia and sepsis are conditions associated with high mortality and are of great impact to health care operations. Among the top causes of mortality in the United States, these conditions cause over 600 fatalities each day. Empiric, broad-spectrum treatment is a common but often a costly approach that may fail to effectively target the correct microbe, may inadvertently harm patients via antimicrobial toxicity or downstream antimicrobial resistance. To meet the diagnostic challenges of bacteremia and sepsis, laboratories must understand the complexity of diagnosing and treating septic patients, in order to focus on creating algorithms that can help direct a more targeted approach to antimicrobial therapy and synergize with existing clinical practices defined in new Surviving Sepsis Guidelines...
August 2016: Microbiology Spectrum
https://www.readbyqxmd.com/read/27725281/biofilm-and-toxin-profile-a-phenotypic-and-genotypic-characterization-of-coagulase-negative-staphylococci-isolated-from-human-bloodstream-infections
#14
S H S P Pedroso, S H C Sandes, K C M Luiz, R S Dias, R A T Filho, J C Serufo, L M Farias, M A R Carvalho, M R Q Bomfim, S G Santos
Coagulase-negative staphylococci (CNS) represent one of the most prevalent microorganisms in nosocomial infections worldwide, nevertheless little is known about their pathogenicity features. Thus, our aim was to characterize virulence aspects of CNS isolated from patients with bloodstream infections assisted in hospitals of Belo Horizonte, MG, Brazil. Strains were identified using bioMérieuxVitek(®) and for biofilm production evaluation, Congo Red Agar (CRA) and polystyrene plates were used. PCR was applied to detect icaA, icaB, icaC, atlE, sea, sec, sed, tsst-1 and agr...
October 8, 2016: Microbial Pathogenesis
https://www.readbyqxmd.com/read/27708384/aptamer-conjugated-live-human-immune-cell-based-biosensors-for-the-accurate-detection-of-c-reactive-protein
#15
Jangsun Hwang, Youngmin Seo, Yeonho Jo, Jaewoo Son, Jonghoon Choi
C-reactive protein (CRP) is a pentameric protein that is present in the bloodstream during inflammatory events, e.g., liver failure, leukemia, and/or bacterial infection. The level of CRP indicates the progress and prognosis of certain diseases; it is therefore necessary to measure CRP levels in the blood accurately. The normal concentration of CRP is reported to be 1-3 mg/L. Inflammatory events increase the level of CRP by up to 500 times; accordingly, CRP is a biomarker of acute inflammatory disease. In this study, we demonstrated the preparation of DNA aptamer-conjugated peripheral blood mononuclear cells (Apt-PBMCs) that specifically capture human CRP...
October 6, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27703997/community-onset-bloodstream-and-other-infections-caused-by-carbapenemase-producing-enterobacteriaceae-epidemiological-microbiological-and-clinical-features
#16
José Ramón Paño-Pardo, Beatriz López Quintana, Fernando Lázaro Perona, Guillermo Ruiz Carrascoso, María Pilar Romero-Gómez, Belén Loeches Yagüe, Beatriz Díaz-Pollán, Ana Martínez-Virto, Jesús Mingorance, Julio García Rodríguez, José Ramón Arribas, Rosa Gómez-Gil
Background.  Because most infections caused by carbapenemase-producing Enterobacteriaceae (CPE) begin during hospitalization, there are limited data about community-onset (CO) infections caused by CPE. Our aim is to describe the frequency of CO infections caused by CPE as well as the clinical features of CO bloodstream infections (CO-BSIs). Methods.  This study includes retrospective case series of CO infections caused by CPE in a tertiary hospital from January 2010 to July 2014. Any clinical sample with a positive culture for CPE that had been ordered by primary care doctors or by doctors at the emergency room (ER) were classified as CO...
September 2016: Open Forum Infectious Diseases
https://www.readbyqxmd.com/read/27703547/sensitivity-and-specificity-of-the-method-used-for-ascertainment-of-healthcare-associated-infections-in-the-second-slovenian-national-prevalence-survey
#17
Mojca Serdt, Tatjana Lejko Zupanc, Aleš Korošec, Irena Klavs
INTRODUCTION: The second Slovenian national healthcare-associated infections (HAIs) prevalence survey (SNHPS) was conducted in acute-care hospitals in 2011. The objective was to assess the sensitivity and specificity of the method used for the ascertainment of six types of HAIs (bloodstream infections, catheter-associated infections, lower respiratory tract infections, pneumoniae, surgical site infections, and urinary tract infections) in the University Medical Centre Ljubljana (UMCL)...
December 1, 2016: Zdravstveno Varstvo
https://www.readbyqxmd.com/read/27688629/comparative-evaluation-of-the-role-of-single-and-multiple-blood-specimens-in-the-outcome-of-blood-cultures-using-bact-alert-3d-automated-blood-culture-system-in-a-tertiary-care-hospital
#18
D Elantamilan, Valarie Wihiwot Lyngdoh, Annie B Khyriem, Jyotismita Rajbongshi, Ishani Bora, Surbala Thingujam Devi, Prithwis Bhattacharyya, Himesh Barman
INTRODUCTION: Bloodstream infection (BSI) is a leading cause of mortality in critically ill patients. The mortality directly attributable to BSI has been estimated to be around 16% and 40% in general hospital population and Intensive Care Unit (ICU) population, respectively. The detection rate of these infections increases with the number of blood samples obtained for culture. The newer continuous monitoring automated blood culture systems with enhanced culture media show increased yield and sensitivity...
September 2016: Indian Journal of Critical Care Medicine
https://www.readbyqxmd.com/read/27647068/-analysis-of-the-pathogenic-characteristics-of-162-severely-burned-patients-with-bloodstream-infection
#19
Y L Gong, Z C Yang, S P Yin, M X Liu, C Zhang, X Q Luo, Y Z Peng
Objective: To analyze the distribution and drug resistance of pathogen isolated from severely burned patients with bloodstream infection, so as to provide reference for the clinical treatment of these patients. Methods: Blood samples of 162 severely burned patients (including 120 patients with extremely severe burn) with bloodstream infection admitted into our burn ICU from January 2011 to December 2014 were collected. Pathogens were cultured by fully automatic blood culture system, and API bacteria identification panels were used to identify pathogen...
September 20, 2016: Zhonghua Shao Shang za Zhi, Zhonghua Shaoshang Zazhi, Chinese Journal of Burns
https://www.readbyqxmd.com/read/27639859/increasing-incidence-of-carbapenemase-producing-escherichia-coli-and-klebsiella-pneumoniae-in-belgian-hospitals
#20
M De Laveleye, T D Huang, P Bogaerts, C Berhin, C Bauraing, P Sacré, A Noel, Y Glupczynski
Carbapenemase-producing Enterobacteriaceae are increasingly reported worldwide. The aim of the study was to determine the incidence and molecular epidemiology of carbapenemase-producing (CP) Escherichia coli and Klebsiella pneumoniae (CP-E/K) in Belgium. Eleven hospital-based laboratories collected carbapenem non-susceptible (CNS) isolates of E. coli and K. pneumoniae detected in clinical specimens from January 2013 to December 2014. All CNS strains were tested for carbapenemase production and typed by multilocus sequence typing (MLST) for a 6-month period as part of the European Survey on Carbapenemase-Producing Enterobacteriaceae in Europe (EuSCAPE) structured survey...
September 17, 2016: European Journal of Clinical Microbiology & Infectious Diseases
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