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Bloodstream infection detection

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...
October 7, 2016: Journal of Global Antimicrobial Resistance
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
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 7, 2016: Microbial Pathogenesis
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
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
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
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
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
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
H E Dekter, C C Orelio, M C Morsink, S Tektas, B Vis, R Te Witt, W B van Leeuwen
Patients suffering from bacterial bloodstream infections have an increased risk of developing systematic inflammatory response syndrome (SIRS), which can result in rapid deterioration of the patients' health. Diagnostic methods for bacterial identification and antimicrobial susceptibility tests are time-consuming. The aim of this study was to investigate whether Raman spectroscopy would be able to rapidly provide an antimicrobial susceptibility profile from bacteria isolated directly from positive blood cultures...
September 8, 2016: European Journal of Clinical Microbiology & Infectious Diseases
Andrea Sbrana, Martina Torchio, Giuditta Comolli, Andrea Antonuzzo, Marco Danova
The use of procalcitonin (PCT) as an early marker of infectious episodes in cancer patients is still controversial. We performed a MEDLINE search of peer-reviewed articles published between January 1990 and December 2015, and finally we analysed 15 articles. PCT seems to have a good diagnostic value of infectious episodes in cancer patients and its accuracy seems greater if we consider major events, such as bloodstream infections and sepsis. Serial evaluations of this protein seem to be more accurate in the diagnostic phase and useful to predict outcome and response to antibacterial treatment...
September 2016: New Microbiologica
María Guembe, Pablo Martín-Rabadán, Raquel Cruces, María Jesús Pérez Granda, Emilio Bouza
The Maki technique is the standard method for detecting catheter tip (CT) colonization. However, some "multi-lumen" catheters finish in a vaulted fornix and end at different distances from the CT. Therefore, we compared the traditional Maki technique with the sonication method using several cross-cut fragments of the CT. Our objective was to assess the yield of the Maki technique followed by sonication in the detection of adult CT colonization and catheter-related bloodstream infection (C-RBSI). For 3months, we prospectively performed CT cultures of polyurethane catheters from adult patients admitted to our institution...
November 2016: Journal of Microbiological Methods
Kate Costeloe, Ursula Bowler, Peter Brocklehurst, Pollyanna Hardy, Paul Heal, Edmund Juszczak, Andy King, Nicola Panton, Fiona Stacey, Angela Whiley, Mark Wilks, Michael R Millar
BACKGROUND: Necrotising enterocolitis (NEC) and late-onset sepsis remain important causes of death and morbidity in preterm babies. Probiotic administration might strengthen intestinal barrier function and provide protection; this is supported by published meta-analyses, but there is a lack of large well-designed trials. OBJECTIVE: To test the use of the probiotic Bifidobacterium breve strain BBG-001 to prevent NEC, late-onset sepsis and death in preterm babies while monitoring probiotic colonisation of participants...
August 2016: Health Technology Assessment: HTA
Marwa Mostafa Mostafa, Mohammad Nassef, Amr Badr
BACKGROUND AND OBJECTIVE: Salmonella and Escherichia coli are different types of bacteria that cause food poisoning in humans. In the elderly, infants and people with chronic conditions, it is very dangerous if Salmonella or E. coli gets into the bloodstream and then they must be treated by phage therapy. Treating Salmonella and E. coli by phage therapy affects the gut flora. This research paper presents a system for detecting the effects of virulent E. coli and Salmonella bacteriophages on human gut...
October 2016: Computer Methods and Programs in Biomedicine
Fabianne Carlesse, Paola Cappellano, Milene Gonçalves Quiles, Liana Carballo Menezes, Antonio Sérgio Petrilli, Antonio Carlos Pignatari
BACKGROUND: Bloodstream infections (BSIs) are the major cause of mortality in cancer patients. Molecular techniques are used for rapid diagnosis of BSI, allowing early therapy and improving survival. We aimed to establish whether real-time quantitative polymerase chain reaction (qPCR) could improve early diagnosis and therapy in paediatric cancer patients, and describe the predominant pathogens of BSI and their antimicrobial susceptibility. METHODS: Blood samples were processed by the BACTEC system and microbial identification and susceptibility tests were performed by the Phoenix system...
2016: BMC Infectious Diseases
Thaina Miranda da Costa, Priscylla Guimarães Migueres Morgado, Fernanda Sampaio Cavalcante, Andreia Paredes Damasco, Simone Aranha Nouér, Kátia Regina Netto Dos Santos
This study analyzed clinical and microbiological characteristics of heteroresistant (hVISA) and vancomycin-intermediate Staphylococcus aureus (VISA) from bloodstream infections (BSI) in a Brazilian teaching hospital, between 2011 and 2013. Minimum inhibitory concentrations (MIC) of antimicrobials were determined by broth microdilution method and SCCmec was detected by PCR. Isolates with a vancomycin MIC ≥ 2mg/L were cultured on BHI agar with 3, 4 or 6 mg/L (BHIa3, BHIa4 or BHIa6) of vancomycin and BHIa4 with casein (BHIa4ca)...
2016: PloS One
Man Mohan Mehndiratta, Rajeev Nayak, Sana Ali, Ajay Sharma
BACKGROUND: Bloodstream infections (BSIs) are among the serious hospital-acquired infections. Data regarding BSIs in intensive care units (ICUs) are available but there is limited information regarding these infections in neurology and neurosurgery intensive care units (NNICUs). OBJECTIVES: This study was conducted to find out the occurrence of BSI in NNICU patients of a tertiary care institute in India, along with the microbiological profile and risk factors associated with it...
July 2016: Annals of Indian Academy of Neurology
G Merino-Espinosa, V Corpas-López, F Morillas-Márquez, V Díaz-Sáez, J Martín-Sánchez
Trypanosomes are widespread haemoflagellate protozoans, commonly found in all groups of vertebrates and usually transmitted by arthropods. Non-pathogenic species are those that cause little or no apparent negative effects in the host and it is accepted that Trypanosoma nabiasi is the species that infects the domestic and wild rabbit, Oryctolagus cuniculus. Knowledge about genetic variability, in vitro cultivation and infectivity of this parasite is very scarce, so the aim of this study was to provide an insight on them...
August 24, 2016: Infection, Genetics and Evolution
Sergio Araujo, Larissa Oliveira Freitas, Luiz Ricardo Goulart, Isabela Maria Bernardes Goulart
BACKGROUND:  Leprosy persists as public health problem. The chain of transmission and mechanism of infection are not completely understood. Here we investigated the route of infection and of disease onset, from airways exposure, colonization, and bloodstream dissemination. METHODS:  M. leprae DNA was detected through qPCR in nasal vestibule, nasal turbinate mucosa, and peripheral blood samples, plus anti-PGL-I serology and skin tests, from the same individual, of 113 leprosy patients and 104 household contacts of patients (HHCs)...
August 23, 2016: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
V Pascual, N Alonso, M Simó, G Ortiz, M C Garcia, M Xercavins, A Rivera, M A Morera, E Miró, E Espejo, F Navarro, M Gurguí, J Pérez, M Rodríguez-Carballeira, J Garau, E Calbo
The aim of the study was to investigate the epidemiology and clinical features of bloodstream infections due to Escherichia coli producing AmpC β-lactamases (AmpC-Ec-BSI). In a multi-centre case-control study, all third-generation-cephalosporin-resistant Escherichia coli BSI (3GC-Ec-BSI) isolates were analysed. Acquired bla AmpC (bla ac-AmpC) detection was done by polymerase chain reaction (PCR) and sequencing. Chromosomal bla AmpC (bla c-AmpC) expression was quantified by real-time PCR. Cases were patients with AmpC-Ec-BSI...
August 22, 2016: European Journal of Clinical Microbiology & Infectious Diseases
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