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https://www.readbyqxmd.com/read/28730697/impact-of-simultaneous-glutamate-dehydrogenase-gdh-and-toxin-a-b-rapid-immunoassay-on-clostridium-difficile-diagnosis-and-treatment-in-hospitalized-patients-with-antibiotic-associated-diarrhea-in-a-university-hospital-of-brazil
#1
Guilherme Grossi Lopes Cançado, Rodrigo Otávio Silveira Silva, Amanda Pontes Nader, Francisco Carlos Faria Lobato, Eduardo Garcia Vilela
BACKGROUND: Clostridium difficile is a major cause of health care-associated infection, but disagreement between diagnostic tests is an ongoing barrier to clinical decision making. Conventional enzyme immunoassay (EIA) for toxin detection is currently the most frequently used technique for CDI diagnosis, but its low sensitivity makes the development of an alternative strategy necessary for improving the diagnosis in developing countries. METHODS: Between years 2011 and 2015, 154 stool samples from patients with antibiotic-associated diarrhea were examined by toxigenic culture (TC) and EIA for the diagnosis of CDI...
July 20, 2017: Journal of Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28730660/bezlotoxumab-a-novel-agent-for-the-prevention-of-recurrent-clostridium-difficile-infection
#2
Wesley D Kufel, Aaron S Devanathan, Ashley H Marx, David J Weber, Lindsay M Daniels
Over the last decade, the incidence and severity of Clostridium difficile infection (CDI) have significantly increased, leading to a rise in CDI-associated hospitalizations, health care costs, and mortality. Although treatment options exist for CDI, recurrence is frequent following treatment. Furthermore, patients with at least one CDI recurrence are at an increased risk of developing additional recurrences. A novel approach to the prevention of recurrent CDI is the use of monoclonal antibodies directed against the toxins responsible for CDI as an adjunct to antibiotic treatment...
July 21, 2017: Pharmacotherapy
https://www.readbyqxmd.com/read/28729205/antimicrobial-susceptibility-of-clostridium-difficile-isolates-in-israel
#3
Linda Tkhawkho, Orna Nitzan, Nina Pastukh, Diana Brodsky, Karen Jackson, Avi Peretz
OBJECTIVES: An increase of Clostridium difficile isolates with reduced susceptibility to various antimicrobial agents has been observed, including isolates that are non-susceptible to antibiotics that are routinely used for treatment of C. difficile, such as vancomycin and metronidazole. We determined the susceptibility rates of C. difficile isolates from hospitals in northern Israel to various antibiotics including tigecycline, which was not previously reported from Israel. METHODS: A total of 81 stool samples were collected from three hospitals in northern Israel from patients with C...
July 17, 2017: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/28728905/perceptions-of-clostridium-difficile-infections-among-infection-control-professionals-in-taiwan
#4
Yuan-Pin Hung, Jen-Chieh Lee, Hsiao-Ju Lin, Chun-Wei Chiu, Jia-Ling Wu, Hsiao-Chieh Liu, I-Hsiu Huang, Pei-Jane Tsai, Wen-Chien Ko
BACKGROUND: High Clostridium difficile colonization and infection rates among hospitalized patients had been noted in Taiwan. Nevertheless, the cognition about clinical diagnosis and management of CDI among infection control professionals in Taiwan is not clear. MATERIAL AND METHODS: A 24-item survey questionnaire about the diagnosis, therapy, or infection control policies toward CDI was distributed in the annual meeting of the Infectious Disease Society of Taiwan (IDST) in October 2015 and Infectious Control Society of Taiwan (ICST) in April 2016...
June 29, 2017: Journal of Microbiology, Immunology, and Infection, Wei Mian Yu Gan Ran za Zhi
https://www.readbyqxmd.com/read/28724879/infectious-complications-in-patients-with-cardiac-implantable-electronic-devices-risk-factors-prevention-and-prognosis
#5
Anna Polewczyk, Wojciech Jacheć, Aneta Maria Polewczyk, Andrzej Tomasik, Marianna Janion, Andrzej Kutarski
INTRODUCTION    Cardiac device infections (CDI) are still a significant problem. The knowledge of risk factors for CDI is crucial both for preventing infections and reducing mortality. OBJECTIVES    The assesment of the risk factors and long term survival of patients with CDI. PATIENTS AND METHODS    The clinical data of 1837 patients (40.9% CDI) undergoing transvenous leads extraction (TLE) at a single institution from 2006 to 2015 was analyzed. We compared the clinical and procedure-related factors for all types of CDI: isolated pocket infection (IPI), isolated lead-related infective endocarditis (ILRIE) and PI+LRIE...
July 19, 2017: Polish Archives of Internal Medicine
https://www.readbyqxmd.com/read/28723262/the-risk-of-inflammatory-bowel-disease-flares-after-fecal-microbiota-transplantation-systematic-review-and-meta-analysis
#6
Taha Qazi, Thelina Amaratunga, Edward L Barnes, Monika Fischer, Zain Kassam, Jessica R Allegretti
BACKGROUND: Several studies have suggested worsening in inflammatory bowel disease (IBD) activity following fecal microbiota transplantation (FMT) Aim: We aimed to assess the risk of worsening in IBD activity following FMT. METHODS: An electronic search was conducted using MEDLINE (1946-June 2016), EMBASE (1954-June 2016) and Cochrane Central Register of Controlled Trials (2016). Studies in which FMT was provided to IBD patients for IBD management or CDI treatment were included...
July 19, 2017: Gut Microbes
https://www.readbyqxmd.com/read/28721981/detection-of-clostridium-difficile-antigen-and-toxin-in-stool-specimens-comparison-of-the-c-difficile-quik-chek-complete-enzyme-immunoassay-and-genexpert-c-difficile-polymerase-chain-reaction-assay
#7
Abiola C Senok, Kamel M Aldosari, Rayan A Alowaisheq, Othman A Abid, Khalid A Alsuhaibani, Mohammad A Khan, Ali M Somily
BACKGROUND/AIMS: Accurate and rapid laboratory diagnosis of Clostridium difficile infections (CDI) remains a significant challenge. A two-step algorithm for detection of toxigenic C. difficile in stool based on initial screening for glutamate dehydrogenase assay followed by confirmation by toxin A+B detection using an enzyme immunoassay (EIA) or molecular assay has been proposed. We aimed to evaluate the C. difficile Quik Chek Complete® (QCC-EIA) versus the GeneXpert® C. difficile polymerase chain reaction (PCR) assay in this two-step algorithm...
July 2017: Saudi Journal of Gastroenterology: Official Journal of the Saudi Gastroenterology Association
https://www.readbyqxmd.com/read/28715757/trace-element-concentrations-in-the-groundwater-of-the-tamiraparani-river-basin-south-india-insights-from-human-health-risk-and-multivariate-statistical-techniques
#8
N S Magesh, N Chandrasekar, L Elango
This study investigates the concentration of trace elements in the groundwater of Tamiraparani river basin, South India. 124 groundwater samples were collected representing diverse landuse condition over the study area. The results reveal that the mean concentrations of Fe, Mn, Cu, Cr, Pb, Zn and Ni were 0.269, 0.02, 0.007, 0.007, 0.003, 0.066, and 0.004 ppm respectively. The decreasing trend of trace element content shows the following order: Fe > Zn > Mn > Cu > Cr > Ni > Pb...
July 11, 2017: Chemosphere
https://www.readbyqxmd.com/read/28715501/diversity-and-distribution-of-nuclease-bacteriocins-in-bacterial-genomes-revealed-using-hidden-markov-models
#9
Connor Sharp, James Bray, Nicholas G Housden, Martin C J Maiden, Colin Kleanthous
Bacteria exploit an arsenal of antimicrobial peptides and proteins to compete with each other. Three main competition systems have been described: type six secretion systems (T6SS); contact dependent inhibition (CDI); and bacteriocins. Unlike T6SS and CDI systems, bacteriocins do not require contact between bacteria but are diffusible toxins released into the environment. Identified almost a century ago, our understanding of bacteriocin distribution and prevalence in bacterial populations remains poor. In the case of protein bacteriocins, this is because of high levels of sequence diversity and difficulties in distinguishing their killing domains from those of other competition systems...
July 17, 2017: PLoS Computational Biology
https://www.readbyqxmd.com/read/28712640/resident-calmodulin-primes-nmda-receptors-for-ca-2-dependent-inactivation
#10
Gary J Iacobucci, Gabriela K Popescu
N-methyl-d-aspartate (NMDA) receptors are glutamate- and glycine-gated channels that flux Na(+) and Ca(2+) into postsynaptic neurons during synaptic transmission. The resulting intracellular Ca(2+) transient is essential to physiological and pathological processes related to synaptic development, plasticity, and apoptosis. It also engages calmodulin (CaM) to reduce subsequent NMDA receptor activity in a process known as Ca(2+)-dependent inactivation (CDI). Here, we used whole-cell electrophysiology to measure CDI and computational modeling to dissect the sequence of events that underlies it...
July 14, 2017: Biophysical Journal
https://www.readbyqxmd.com/read/28712548/excess-mortality-between-2007-and-2014-among-patients-with-clostridium-difficile-infection-a-french-health-insurance-database-analysis
#11
F Barbut, S Bouée, L Longepierre, M Goldberg, C Bensoussan, L Levy-Bachelot
BACKGROUND: The impact of CDI (Clostridium difficile infections) on mortality is controversial. AIM: To assess excess mortality due to CDI in France. METHOD: Two cohorts of patients with CDI and a cohort of matched controls were extracted from a 1% representative sample of subjects covered by the general health insurance system in France (EGB database, 660,000 patients). The CDI patients were hospitalized with CDI as a principal diagnosis (PD) or an associated diagnosis (AD) between 2007 and 2014, but not in 2006...
July 13, 2017: Journal of Hospital Infection
https://www.readbyqxmd.com/read/28707337/systematic-review-with-meta-analysis-the-efficacy-of-faecal-microbiota-transplantation-for-the-treatment-of-recurrent-and-refractory-clostridium-difficile-infection
#12
REVIEW
M N Quraishi, M Widlak, N Bhala, D Moore, M Price, N Sharma, T H Iqbal
BACKGROUND: Clostridium difficile infection (CDI) is the commonest nosocomial cause of diarrhoea. Faecal microbiota transplantation (FMT) is an approved treatment for recurrent or refractory CDI but there is uncertainty about its use. AIM: To evaluate the efficacy of FMT in treating recurrent and refractory CDI and investigate outcomes from modes of delivery and preparation. METHODS: A systematic review and meta-analysis was performed. MEDLINE, EMBASE, CINAHL, Cochrane Library, trial registers and conference proceedings were searched...
July 14, 2017: Alimentary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/28706258/transverse-coherence-limited-coherent-diffraction-imaging-using-a-molybdenum-soft-x-ray-laser-pumped-at-moderate-pump-energies
#13
M Zürch, R Jung, C Späth, J Tümmler, A Guggenmos, D Attwood, U Kleineberg, H Stiel, C Spielmann
Coherent diffraction imaging (CDI) in the extreme ultraviolet has become an important tool for nanoscale investigations. Laser-driven high harmonic generation (HHG) sources allow for lab scale applications such as cancer cell classification and phase-resolved surface studies. HHG sources exhibit excellent coherence but limited photon flux due poor conversion efficiency. In contrast, table-top soft X-ray lasers (SXRL) feature excellent temporal coherence and extraordinary high flux at limited transverse coherence...
July 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28704538/intestinal-calcium-and-bile-salts-facilitate-germination-of-clostridium-difficile-spores
#14
Travis J Kochan, Madeline J Somers, Alyssa M Kaiser, Michelle S Shoshiev, Ada K Hagan, Jessica L Hastie, Nicole P Giordano, Ashley D Smith, Alyxandria M Schubert, Paul E Carlson, Philip C Hanna
Clostridium difficile (C. difficile) is an anaerobic gram-positive pathogen that is the leading cause of nosocomial bacterial infection globally. C. difficile infection (CDI) typically occurs after ingestion of infectious spores by a patient that has been treated with broad-spectrum antibiotics. While CDI is a toxin-mediated disease, transmission and pathogenesis are dependent on the ability to produce viable spores. These spores must become metabolically active (germinate) in order to cause disease. C. difficile spore germination occurs when spores encounter bile salts and other co-germinants within the small intestine, however, the germination signaling cascade is unclear...
July 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28701402/increased-durable-b-cell-and-adcc-responses-associated-with-t-helper-responses-to-hiv-1-envelope-in-macaques-vaccinated-with-gp140-occluded-at-the-cd4-receptor-binding-site
#15
Willy M J M Bogers, Susan W Barnett, Herman Oostermeijer, Ivonne G Nieuwenhuis, Niels Beenhakker, Daniella Mortier, Petra Mooij, Gerrit Koopman, Edmund Remarque, Gregoire Martin, Rachel Pei-Jen Lai, Antu K Dey, Yide Sun, Brian Burke, Guido Ferrari, David Montefiori, Loic Martin, David Davis, Indresh Srivastava, Jonathan L Heeney
Strategies are needed to improve the immunogenicity of HIV-1 envelope (Env) antigens for more long lived, efficacious HIV-1 vaccine induced B-cell responses. HIV-1 Env gp140 (native or un-cleaved molecules) or gp120 monomeric proteins elicit relatively poor B-cell responses which are short-lived. We hypothesized that Env engagement of the CD4 receptor on T-helper cells may result in anergic effects on T-cell recruitment and consequently a lack of strong robust and durable B-memory responses. To test this hypothesis we occluded the CD4 binding site (CD4bs) of gp140 by stable cross-linking with a 3kD CD4 miniprotein mimetic serving to block ligation of gp140 on CD4+T-cells while preserving CD4 inducible (CDi) neutralizing and epitopes targeted by antibody dependent cellular cytotoxic (ADCC) effector responses...
July 12, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28700208/starch-derived-porous-carbon-nanosheets-for-high-performance-photovoltaic-capacitive-deionization
#16
Tingting Wu, Gang Wang, Qiang Dong, Fei Zhan, Xu Zhang, Shaofeng Li, Huiying Qiao, Jieshan Qiu
Capacitive deionization (CDI) is an emerging technology that uniquely integrates energy storage and desalination. In this work, porous carbon nanosheets (PCNSs) with an ultrahigh specific surface area of 2853 m(2)/g were fabricated by the simple carbonization of starch followed by KOH activation for the electrode material of photovoltaic CDI. The CDI cell consisting of PCNSs electrodes exhibited a high salt adsorption capacity (SAC) of 15.6 mg/g at ~1.1 V in 500 mg/L NaCl as well as high charge efficiency and low energy consumption...
July 12, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28693926/high-in%C3%A2-vitro-activity-of-fidaxomicin-against-clostridium-difficile-isolates-from-a-university-teaching-hospital-in-china
#17
Jing-Wei Cheng, Qi-Wen Yang, Meng Xiao, Shu-Ying Yu, Meng-Lan Zhou, Timothy Kudinha, Fanrong Kong, Jian-Wei Liao, Ying-Chun Xu
BACKGROUND: Clostridium difficile infection (CDI) is a significant cause of morbidity and mortality in both the acute care setting and the wider healthcare system. The purpose of this study was to evaluate the in vitro activity of fidaxomicin against C.difficile isolates from a university teaching hospital in China. METHODS: One hundred and one C.difficile isolates were collected and analyzed for toxin genes by multiplex PCR. The toxin gene positive strains were also typed by multilocus sequence typing (MLST) and PCR-ribotyping...
June 29, 2017: Journal of Microbiology, Immunology, and Infection, Wei Mian Yu Gan Ran za Zhi
https://www.readbyqxmd.com/read/28693636/acquisition-of-clostridium-difficile-colonization-and-infection-after-transfer-from-a-veterans-affairs-hospital-to-an-affiliated-long-term-care-facility
#18
Suresh Ponnada, Dubert M Guerrero, Lucy A Jury, Michelle M Nerandzic, Jennifer L Cadnum, M Jahangir Alam, Curtis J Donskey
BACKGROUND Clostridium difficile infection (CDI) and asymptomatic carriage of toxigenic C. difficile are common in long-term care facilities (LTCFs). However, whether C. difficile is frequently acquired in the LTCF versus during acute-care admissions remains unknown. OBJECTIVE To test the hypothesis that LTCF residents often acquire C. difficile colonization and infection in the LTCF DESIGN This 5-month cohort study was conducted to determine the incidence of acquisition of C. difficile colonization and infection in asymptomatic patients transferred from a Veterans Affairs hospital to an affiliated LTCF...
July 11, 2017: Infection Control and Hospital Epidemiology
https://www.readbyqxmd.com/read/28692690/risk-of-surgical-site-infection-acute-kidney-injury-and-clostridium-difficile-infection-following-antibiotic-prophylaxis-with-vancomycin-plus-a-beta-lactam-versus-either-drug-alone-a-national-propensity-score-adjusted-retrospective-cohort-study
#19
MULTICENTER STUDY
Westyn Branch-Elliman, John E Ripollone, William J O'Brien, Kamal M F Itani, Marin L Schweizer, Eli Perencevich, Judith Strymish, Kalpana Gupta
BACKGROUND: The optimal regimen for perioperative antimicrobial prophylaxis is controversial. Use of combination prophylaxis with a beta-lactam plus vancomycin is increasing; however, the relative risks and benefits associated with this strategy are unknown. Thus, we sought to compare postoperative outcomes following administration of 2 antimicrobials versus a single agent for the prevention of surgical site infections (SSIs). Potential harms associated with combination regimens, including acute kidney injury (AKI) and Clostridium difficile infection (CDI), were also considered...
July 2017: PLoS Medicine
https://www.readbyqxmd.com/read/28691996/fecal-microbiota-therapy-with-a-focus-on-c-difficile-infection
#20
Lawrence J Brandt
There has been a paradigm shift in our view of bacteria away from their role as just pathogens. We now have a deepening appreciation of their critical influences in our health maintenance, including energy harvest, metabolism, intestinal development, cell proliferation, nervous system and immune function, as well as their role to protect against intestinal and other infections. A perturbed intestinal microbiome has been associated with an increasing number of gastrointestinal (GI) and non-GI diseases but particularly with C...
July 7, 2017: Psychosomatic Medicine
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