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Bloodstream infection detection

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https://www.readbyqxmd.com/read/28427796/molecular-methods-for-septicemia-diagnosis
#1
Francesc Marco
Septicemia remains a major cause of hospital mortality. Blood culture remains the best approach to identify the etiological microorganisms when a bloodstream infection is suspected but it takes long time because it relies on bacterial or fungal growth. The introduction in clinical microbiology laboratories of the matrix-assisted laser desorption ionization time-of-flight mass spectrometry technology, DNA hybridization, microarrays or rapid PCR-based test significantly reduce the time to results. Tests for direct detection in whole blood samples are highly desirable because of their potential to identify bloodstream pathogens without waiting for blood cultures to become positive...
April 17, 2017: Enfermedades Infecciosas y Microbiología Clínica
https://www.readbyqxmd.com/read/28397472/comparison-of-novel-blood-culture-system-dl-bt112tm-with-bact-alert-3dtm-by-using-clinical-samples
#2
Mustafa Altindis, Tayfur Demiray, Mehmet Koroglu, Umit Kilic, Aybala Neslihan Alagoz, Aziz Ogutlu, Oguz Karabay
BACKGROUND: Blood cultures are the main diagnostic laboratory tool to detect bloodstream infections. Many clinical microbiology laboratories utilize automated blood culture systems to isolate infectious agents from blood samples. The diagnostic performance and time-to-detection values of the novel automated blood culture system, DLBt112TM (DL), was compared with BacT/Alert 3DTM (B3D) in this prospective comparative study with clinical samples. METHODS: A total of 356 blood culture sets (178 sets for each system) were evaluated over a 6-month period in a university hospital...
April 1, 2017: Clinical Laboratory
https://www.readbyqxmd.com/read/28397261/validity-and-reliability-of-administrative-coded-data-for-the-identification-of-hospital-acquired-infections-an-updated-systematic-review-with-meta-analysis-and-meta-regression-analysis
#3
Olga Redondo-González, José María Tenías, Ángel Arias, Alfredo J Lucendo
OBJECTIVE: To conduct an updated assessment of the validity and reliability of administrative coded data (ACD) in identifying hospital-acquired infections (HAIs). METHODS: We systematically searched three libraries for studies on ACD detecting HAIs compared to manual chart review. Meta-analyses were conducted for prosthetic and nonprosthetic surgical site infections (SSIs), Clostridium difficile infections (CDIs), ventilator-associated pneumonias/events (VAPs/VAEs) and non-VAPs/VAEs, catheter-associated urinary tract infections (CAUTIs), and central venous catheter-related bloodstream infections (CLABSIs)...
April 11, 2017: Health Services Research
https://www.readbyqxmd.com/read/28395861/dissemination-and-clinical-implications-of-multidrug-resistant-klebsiella-pneumoniae-isolates-producing-oxa-48-in-a-spanish-hospital
#4
A Madueño, J González García, S Fernández-Romero, J Oteo, M Lecuona
BACKGROUND: Healthcare-associated infections caused by Klebsiella pneumoniae isolates are increasing and few effective antibiotics are currently available to treat patients. AIM: To assess the epidemiology, molecular basis, clinical features, and outcomes in the acquisition and dissemination of OXA-48-producing K. pneumoniae (OXA48KP) in a tertiary Spanish hospital between October 2013 and December 2015. METHODS: Clinical, demographic, and microbiological data of patients with OXA48KP in clinical samples were collected from medical records...
March 3, 2017: Journal of Hospital Infection
https://www.readbyqxmd.com/read/28377868/a-case-of-breakthrough-candida-parapsilosis-fungemia-during-micafungin-therapy-for-a-candida-glabrata-bloodstream-infection
#5
Yuta Norimatsu, Daiichi Morii, Asako Kogure, Taeko Hamanaka, Yoshihiro Kuwano, Takayuki Yokozawa, Toshimi Oda
We describe a case of breakthrough Candida parapsilosis fungemia in an 80-year-old woman with pyoderma gangrenosum and rheumatoid arthritis. C. parapsilosis was detected in blood culture while the patient was treated with micafungin for a Candida glabrata bloodstream infection. The breakthrough infection was successfully treated with liposomal amphotericin B.
June 2017: Medical Mycology Case Reports
https://www.readbyqxmd.com/read/28369408/wgs-based-surveillance-of-third-generation-cephalosporin-resistant-escherichia-coli-from-bloodstream-infections-in-denmark
#6
Louise Roer, Frank Hansen, Martin Christen Frølund Thomsen, Jenny Dahl Knudsen, Dennis Schrøder Hansen, Mikala Wang, Jurgita Samulioniené, Ulrik Stenz Justesen, Bent L Røder, Helga Schumacher, Claus Østergaard, Leif Percival Andersen, Esad Dzajic, Turid Snekloth Søndergaard, Marc Stegger, Anette M Hammerum, Henrik Hasman
Objectives: To evaluate a genome-based surveillance of all Danish third-generation cephalosporin-resistant Escherichia coli (3GC-R Ec ) from bloodstream infections between 2014 and 2015, focusing on horizontally transferable resistance mechanisms. Methods: A collection of 552 3GC-R Ec isolates were whole-genome sequenced and characterized by using the batch uploader from the Center for Genomic Epidemiology (CGE) and automatically analysed using the CGE tools according to resistance profile, MLST, serotype and fimH subtype...
March 22, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28362945/complex-routes-of-nosocomial-vancomycin-resistant-enterococcus-faecium-transmission-revealed-by-genome-sequencing
#7
Kathy E Raven, Theodore Gouliouris, Hayley Brodrick, Francesc Coll, Nicholas M Brown, Rosy Reynolds, Sandra Reuter, M Estée Török, Julian Parkhill, Sharon J Peacock
Background: Vancomycin-resistant Enterococcus faecium (VREfm) is a leading cause of nosocomial infection. Here, we describe the utility of whole-genome sequencing in defining nosocomial VREfm transmission. Methods: A retrospective study at a single hospital in the United Kingdom identified 342 patients with E. faecium bloodstream infection over 7 years. Of these, 293 patients had a stored isolate and formed the basis for the study. The first stored isolate from each case was sequenced (200 VREfm [197 vanA, 2 vanB, and 1 isolate containing both vanA and vanB], 93 vancomycin-susceptible E...
April 1, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28360174/complete-genome-sequences-of-isolates-of-enterococcus-faecium-sequence-type-117-a-globally-disseminated-multidrug-resistant-clone
#8
Ana P Tedim, Val F Lanza, Marina Manrique, Eduardo Pareja, Patricia Ruiz-Garbajosa, Rafael Cantón, Fernando Baquero, Teresa M Coque, Raquel Tobes
The emergence of nosocomial infections by multidrug-resistant sequence type 117 (ST117) Enterococcus faecium has been reported in several European countries. ST117 has been detected in Spanish hospitals as one of the main causes of bloodstream infections. We analyzed genome variations of ST117 strains isolated in Madrid and describe the first ST117 closed genome sequences.
March 30, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28343091/rapid-detection-and-ruling-out-of-neonatal-sepsis-by-pcr-coupled-with-electrospray-ionization-mass-spectrometry-pcr-esi-ms
#9
Cristina Delcò, Oliver Karam, Riccardo Pfister, Alain Gervaix, Gesuele Renzi, Stéphane Emonet, Jacques Schrenzel, Klara M Posfay-Barbe
BACKGROUND: Sepsis is an important cause of morbidity and mortality in neonates and clinicians are typically required to administer empiric antibiotics while waiting for blood culture results. However, prolonged and inappropriate use of antibiotics is associated with various complications and adverse events. Better tools to rapidly rule out bacterial infections are therefore needed. AIMS: We aimed to assess the negative predictive value of PCR coupled with Electrospray Ionization Mass Spectrometry (PCR/ESI-MS) compared to conventional blood cultures in neonatal sepsis...
March 23, 2017: Early Human Development
https://www.readbyqxmd.com/read/28327806/invasive-fungal-infection-in-patients-with-hematologic-disorders-in-a-brazilian-tertiary-care-hospital
#10
Milton Camplesi, Hildene Meneses Silva, Adriano Moraes Arantes, Carolina Rodrigues Costa, Fábio Silvestre Ataides, Thaisa Cristina Silva, Maysa de Paula Costa Dos Reis, Maria do Rosário Rodrigues Silva
INTRODUCTION: Invasive fungal infections (IFIs) are an important complication in immunocompromised individuals, particularly neutropenic patients with hematological malignancies. In this study, we aimed to verify the epidemiology and diagnosis of IFIs in patients with hematologic problems at a tertiary hospital in Goiânia-GO, Brazil. METHODS: Data from 117 patients, involving 19 cases of IFIs, were collected. The collected data included diagnosis methods, demographics, clinical characteristics, and in vitro susceptibility to different antifungal agents...
January 2017: Revista da Sociedade Brasileira de Medicina Tropical
https://www.readbyqxmd.com/read/28293420/candidemia-in-a-major-regional-tertiary-referral-hospital-epidemiology-practice-patterns-and-outcomes
#11
Jocelyn Qi-Min Teo, Samuel Rocky Candra, Shannon Jing-Yi Lee, Shannon Yu-Hng Chia, Hui Leck, Ai-Ling Tan, Hui-Peng Neo, Kenneth Wei-Liang Leow, Yiying Cai, Rachel Pui-Lai Ee, Tze-Peng Lim, Winnie Lee, Andrea Lay-Hoon Kwa
BACKGROUND: Candidemia is a common cause of nosocomial bloodstream infections, resulting in high morbidity and mortality. This study was conducted to describe the epidemiology, species distribution, antifungal susceptibility patterns and outcomes of candidemia in a large regional tertiary referral hospital. METHODS: A retrospective surveillance study of patients with candidemia was conducted at Singapore General Hospital between July 2012 and December 2015. In addition, incidence densities and species distribution of candidemia episodes were analysed from 2008 to 2015...
2017: Antimicrobial Resistance and Infection Control
https://www.readbyqxmd.com/read/28290130/the-choosing-wisely-initiative-in-infectious-diseases
#12
REVIEW
Clara Lehmann, Reinhard Berner, Johannes R Bogner, Oliver A Cornely, Katja de With, Susanne Herold, Winfried V Kern, Sebastian Lemmen, Mathias W Pletz, Bernhard Ruf, Bernd Salzberger, Hans Jürgen Stellbrink, Norbert Suttorp, Andrew J Ullmann, Gerd Fätkenheuer, Norma Jung
OBJECTIVE: "Choosing Wisely" is a growing international campaign aiming at practice changes to improve patient health and safety by both, conduct of essential and avoidance of unnecessary diagnostic, preventive and therapeutic procedures. The goal is to create an easily recognizable and distributable list ("Choosing Wisely items") that addresses common over- and underuse in the management of infectious diseases. METHODS: The German Society of Infectious Diseases (DGI) participates in the campaign "Klug Entscheiden" by the German Society of Internal Medicine...
March 13, 2017: Infection
https://www.readbyqxmd.com/read/28284196/burden-of-bloodstream-infection-in-an-area-of-mid-norway-2002-2013-a-prospective-population-based-observational-study
#13
Arne Mehl, Bjørn Olav Åsvold, Stian Lydersen, Julie Paulsen, Erik Solligård, Jan Kristian Damås, Stig Harthug, Tom-Harald Edna
BACKGROUND: Studies from several countries indicate that the incidence and mortality of bloodstream infection (BSI) have been increasing over time. METHODS: We studied the burden of disease and death related to BSI in a defined geographical area of Mid-Norway, where BSI episodes were prospectively recorded by the same microbiological department during 12 consecutive years. Death from BSI was defined as death within 30 days of BSI detection. Age and sex standardized incidence and mortality rates and case fatality rates were calculated...
March 11, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28280486/the-resistance-phenotype-and-molecular-epidemiology-of-klebsiella-pneumoniae-in-bloodstream-infections-in-shanghai-china-2012-2015
#14
Shu-Zhen Xiao, Su Wang, Wen-Man Wu, Sheng-Yuan Zhao, Fei-Fei Gu, Yu-Xing Ni, Xiao-Kui Guo, Jie-Ming Qu, Li-Zhong Han
Klebsiella pneumoniae (K.pneumoniae) is a common nosocomial pathogen causing bloodstream infections. Antibiotic susceptibility surveillance and molecular characterization will facilitate prevention and management of K. pneumoniae bloodstream infections. K. pneumoniae isolates causing bloodstream infections were consecutively collected between January 2012 and December 2015 in Shanghai. Eighty isolates (20 per year) were randomly selected and enrolled in this study. Drug susceptibility were determined by the disk diffusion method...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28280485/characterization-of-the-prophage-repertoire-of-african-salmonella-typhimurium-st313-reveals-high-levels-of-spontaneous-induction-of-novel-phage-btp1
#15
Siân V Owen, Nicolas Wenner, Rocío Canals, Angela Makumi, Disa L Hammarlöf, Melita A Gordon, Abram Aertsen, Nicholas A Feasey, Jay C D Hinton
In the past 30 years, Salmonella bloodstream infections have become a significant health problem in sub-Saharan Africa and are responsible for the deaths of an estimated 390,000 people each year. The disease is predominantly caused by a recently described sequence type of Salmonella Typhimurium: ST313, which has a distinctive set of prophage sequences. We have thoroughly characterized the ST313-associated prophages both genetically and experimentally. ST313 representative strain D23580 contains five full-length prophages: BTP1, Gifsy-2(D23580), ST64B(D23580), Gifsy-1(D23580), and BTP5...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28268063/human-escherichia-coli-isolates-from-hemocultures-septicemia-linked-to-urogenital-tract-infections-is-caused-by-isolates-harboring-more-virulence-genes-than-bacteraemia-linked-to-other-conditions
#16
COMPARATIVE STUDY
Lenka Micenková, Alžbeta Beňová, Lucia Frankovičová, Juraj Bosák, Martin Vrba, Alena Ševčíková, Marta Kmeťová, David Šmajs
Escherichia coli is the most common cause of bloodstream infections and community-acquired sepsis. The main aim of this study was to determine virulence characteristics of E. coli isolates from hemocultures of patients with a primary disease of urogenital tract, digestive system, a neoplastic blood disease, or other conditions. Results from a set of 314 E. coli isolates from hemocultures were compared to data from a previously published analysis of 1283 fecal commensal E. coli isolates. Genetic profiling of the 314 E...
April 2017: International Journal of Medical Microbiology: IJMM
https://www.readbyqxmd.com/read/28265408/catheter-related-thrombosis-diagnosed-by-computed-tomography
#17
Yohei Yamauchi, Akira Baba, Yumi Okuyama
Catheter-related bloodstream infection can be detected with CT. Although it is not mandatory for its diagnosis, it is strong evidence as a cause of fever if detected incidentally.
March 2017: Clinical Case Reports
https://www.readbyqxmd.com/read/28246373/serological-diagnosis-of-cystic-echinococcosis-in-cattle
#18
Aitbay K Bulashev, Zhanbolat A Suranshiev, Orken S Akibekov, Zhanara Zh Akanova, Gulmira A Abulgazimova
An IgM murine monoclonal antibody (MAb) was obtained against the excretory-secretory antigen (ES-Ag) of in vitro reared protoscoleces of Echinococcus granulosus (Batsch, 1786). Western blotting revealed that the MAb recognised a 20.6 kDa protein of this ES-Ag. The MAb was used in sandwich enzyme-linked immunosorbent assay (s-ELISA) for selective sensitisation of the solid phase with the protoscolex-specific protein from its ES-Ag and somatic antigen (S-Ag) to examine serum samples of 108 cows from a cystic echinococcosis (CE) endemic area for specific antibodies and to compare the results with those from necropsies and an indirect ELISA (i-ELISA)...
February 17, 2017: Folia Parasitologica
https://www.readbyqxmd.com/read/28224115/the-escherichia-coli-serogroup-o1-and-o2-lipopolysaccharides-are-encoded-by-multiple-o-antigen-gene-clusters
#19
Sabine Delannoy, Lothar Beutin, Patricia Mariani-Kurkdjian, Aubin Fleiss, Stéphane Bonacorsi, Patrick Fach
Escherichia coli strains belonging to serogroups O1 and O2 are frequently associated with human infections, especially extra-intestinal infections such as bloodstream infections or urinary tract infections. These strains can be associated with a large array of flagellar antigens. Because of their frequency and clinical importance, a reliable detection of E. coli O1 and O2 strains and also the frequently associated K1 capsule is important for diagnosis and source attribution of E. coli infections in humans and animals...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28222125/streptococcus-sanguinis-induces-neutrophil-cell-death-by-production-of-hydrogen-peroxide
#20
Ryuichi Sumioka, Masanobu Nakata, Nobuo Okahashi, Yixuan Li, Satoshi Wada, Masaya Yamaguchi, Tomoko Sumitomo, Mikako Hayashi, Shigetada Kawabata
Streptococcus is the dominant bacterial genus in the human oral cavity and a leading cause of infective endocarditis. Streptococcus sanguinis belongs to the mitis group of streptococci and produces hydrogen peroxide (H2O2) by the action of SpxB, a pyruvate oxidase. In this study, we investigated the involvement of SpxB in survival of S. sanguinis in human blood and whether bacterial H2O2 exhibits cytotoxicity against human neutrophils. Results of a bactericidal test with human whole blood revealed that the spxB mutation in S...
2017: PloS One
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