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C. Difficile

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https://www.readbyqxmd.com/read/28209199/making-life-difficult-for-clostridium-difficile-augmenting-the-pathogen-s-metabolic-model-with-transcriptomic-and-codon-usage-data-for-better-therapeutic-target-characterization
#1
Sara Saheb Kashaf, Claudio Angione, Pietro Lió
BACKGROUND: Clostridium difficile is a bacterium which can infect various animal species, including humans. Infection with this bacterium is a leading healthcare-associated illness. A better understanding of this organism and the relationship between its genotype and phenotype is essential to the search for an effective treatment. Genome-scale metabolic models contain all known biochemical reactions of a microorganism and can be used to investigate this relationship. RESULTS: We present icdf834, an updated metabolic network of C...
February 16, 2017: BMC Systems Biology
https://www.readbyqxmd.com/read/28206678/systematic-review-with-meta-analysis-the-impact-of-clostridium-difficile-infection-on-the-short-and-long-term-risks-of-colectomy-in-inflammatory-bowel-disease
#2
REVIEW
C C Y Law, R Tariq, S Khanna, S Murthy, J D McCurdy
BACKGROUND: Clostridium difficile infection (CDI) is associated with increased mortality in inflammatory bowel disease (IBD), but the risk of colectomy is variable and has not been adequately studied. AIM: To perform a systematic review and meta-analysis to assess the impact of CDI on colectomy risk in IBD. METHODS: Multiple databases were searched systematically for observational studies reporting colectomy risk in IBD, stratified by the presence of CDI, and the duration of follow-up (short term 3 months, and long term at least 1 year)...
February 16, 2017: Alimentary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/28198085/the-alternative-sigma-factor-%C3%AF-b-plays-a-crucial-role-in-adaptive-strategies-of-clostridium-difficile-during-gut-infection
#3
Nicolas Kint, Claire Janoir, Marc Monot, Sandra Hoys, Olga Soutourina, Bruno Dupuy, Isabelle Martin-Verstraete
Clostridium difficile is a major cause of diarrhoea associated with antibiotherapy. Exposed to stresses in the gut, C. difficile can survive by inducing protection, detoxification, and repair systems. In several firmicutes, most of these systems are controlled by the general stress response involving σ(B) . In this work, we studied the role of σ(B) in the physiopathology of C. difficile. We showed that the survival of the sigB mutant during the stationary phase was reduced. Using a transcriptome analysis, we showed that σ(B) controls the expression of ∼25% of genes including genes involved in sporulation, metabolism, cell surface biogenesis, and the management of stresses...
February 15, 2017: Environmental Microbiology
https://www.readbyqxmd.com/read/28195066/successful-therapy-of-clostridium-difficile-infection-with-fecal-microbiota-transplantation
#4
P C Konturek, J Koziel, W Dieterich, D Haziri, S Wirtz, I Glowczyk, K Konturek, M F Neurath, Y Zopf
Clostridium difficile infection (CDI) is the most common cause of infectious diarrhea and represents an important burden for healthcare worldwide. Symptoms of severe CDI include watery, foul-smelling diarrhea, peripheral leucocytosis, increased C-reactive protein (CRP), acute renal failure, hypotension and pseudomembranous colitis. Recent studies indicate that the main cause of CDI is dysbiosis, an imbalance in the normal gut microbiota. The restoration of a healthy gut microbiota composition via fecal microbiota transplantation (FMT) recently became more popular...
December 2016: Journal of Physiology and Pharmacology: An Official Journal of the Polish Physiological Society
https://www.readbyqxmd.com/read/28193327/cloning-expression-and-biochemical-characterization-of-a-novel-nadp-dependent-7%C3%AE-hydroxysteroid-dehydrogenase-from-clostridium-difficile-and-its-application-for-the-oxidation-of-bile-acids
#5
Daniel Bakonyi, Werner Hummel
A gene encoding a novel 7α-specific NADP(+)-dependent hydroxysteroid dehydrogenase from Clostridium difficile was cloned and heterologously expressed in Escherichia coli. The enzyme was purified using an N-terminal hexa-his-tag and biochemically characterized. The optimum temperature is at 60°C, but the enzyme is inactivated at this temperature with a half-life time of 5min. Contrary to other known 7α-HSDHs, for example from Clostridium sardiniense or E. coli, the enzyme from C. difficile does not display a substrate inhibition...
April 2017: Enzyme and Microbial Technology
https://www.readbyqxmd.com/read/28188880/comparison-of-clostridium-difficile-minimum-inhibitory-concentrations-obtained-using-agar-dilution-vs-broth-microdilution-methods
#6
Christine J Hastey, Suzanne E Dale, Julia Nary, Diane Citron, Jennifer H Law, Darcie E Roe-Carpenter, Laurent Chesnel
Due to increasing antibiotic resistance among anaerobic bacteria, routine antimicrobial susceptibility testing is recommended by the Clinical and Laboratory Standards Institute (CLSI). This study compared the minimum inhibitory concentrations (MICs) from 920 Clostridium difficile isolates tested against seven antimicrobial agents using the two current CLSI reference methodologies, agar dilution method, vs broth microdilution method. A subset of isolate testing was performed independently by two laboratories to evaluate reproducibility...
February 7, 2017: Anaerobe
https://www.readbyqxmd.com/read/28182338/evaluation-of-nested-polymerase-chain-reaction-and-immunoassay-for-rapid-diagnosis-of-clostridium-difficile-in-children-with-community-acquired-diarrhea
#7
Ahmed Elewa, Maysaa El Sayed-Zaki
BACKGROUND: Clostridium difficile (C. difficile) is a known pathogen associated with diarrhea especially in hospital acquired diarrhea. Yet, it is being recognized as a probable etiology for community acquired diarrhea. The aim of the present study was to detect the presence of C. difficile as a pathogen causing community acquired diarrhea in children and to verify the value of different laboratory methods for diagnosis, namely specific culture, immunoassay for toxin detection, and nested polymerase chain reaction (nested-PCR)...
February 1, 2017: Clinical Laboratory
https://www.readbyqxmd.com/read/28181098/effect-of-aging-on-the-composition-of-fecal-microbiota-in-donors-for-fmt-and-its-impact-on-clinical-outcomes
#8
Rohit Anand, Yang Song, Shashank Garg, Mohit Girotra, Amitasha Sinha, Anita Sivaraman, Laila Phillips, Sudhir K Dutta
BACKGROUND: Fecal microbiota transplantation (FMT) is emerging as an effective therapy for the treatment of recurrent Clostridium difficile infection (RCDI). Selecting an appropriate donor is vital to the success of FMT. However, the relationship between age of donors and the efficacy of FMT has not been examined to date. The aim of this study was to examine the effect of age of healthy donors on their fecal microbiota and assess the impact of these changes on the clinical efficacy of FMT...
February 8, 2017: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/28181032/comprehensive-evaluation-of-chemiluminescent-immunoassays-for-the-laboratory-diagnosis-of-clostridium-difficile-infection
#9
A Makristathis, I Zeller, D Mitteregger, M Kundi, A M Hirschl
For the microbiological diagnosis of a Clostridium (C.) difficile infection (CDI), a two-test algorithm consisting of a C. difficile glutamate dehydrogenase (GDH)-immunoassay followed by a toxin-immunoassay in positive cases is widely used. In this study, two chemiluminescent immunoassays (CLIAs), one for GDH and the other for the toxins A and B, have been evaluated systematically using appropriate reference methods. Three-hundred diarrhoeal stool specimens submitted for CDI diagnosis were analysed by the LIAISON CLIAs (DiaSorin)...
February 8, 2017: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/28178876/designing-fecal-microbiota-transplant-trials-that-account-for-differences-in-donor-stool-efficacy
#10
Scott W Olesen, Thomas Gurry, Eric J Alm
Fecal microbiota transplantation is a highly effective intervention for patients suffering from recurrent Clostridium difficile, a common hospital-acquired infection. Fecal microbiota transplantation's success as a therapy for C. difficile has inspired interest in performing clinical trials that experiment with fecal microbiota transplantation as a therapy for other conditions like inflammatory bowel disease, obesity, diabetes, and Parkinson's disease. Results from clinical trials that use fecal microbiota transplantation to treat inflammatory bowel disease suggest that, for at least one condition beyond C...
January 1, 2017: Statistical Methods in Medical Research
https://www.readbyqxmd.com/read/28178052/fecal-microbiota-transplant-for-clostridium-difficile-infection-in-a-pregnant-patient
#11
Bejan J Saeedi, Doree Gardner Morison, Colleen S Kraft, Tanvi Dhere
BACKGROUND: Clostridium difficile infection has been associated with negative outcomes in the general population and in pregnant patients. Fecal microbiota transplant has become the standard for treatment of recurrent as well as refractory C difficile infection. CASE: We present a case of a 28-year-old pregnant woman who presented with recurrent C difficile infection despite treatment with vancomycin and fidaxomicin and underwent a successful fecal microbiota transplant through colonoscopy at 18 weeks of gestation...
February 6, 2017: Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28177534/laboratory-diagnosis-of-clostridium-difficile-infection-comparison-of-techlab-c-diff-quik-chek-complete-xpert-c-difficile-and-multistep-algorithmic-approach
#12
Ja Young Seo, Ji Hun Jeong, Kyung Hee Kim, Jeong-Yeal Ahn, Pil-Whan Park, Yiel-Hea Seo
BACKGROUND: Clostridium difficile is a major pathogen responsible for nosocomial infectious diarrhea. We explored optimal laboratory strategies for diagnosis of C. difficile infection (CDI) in our clinical settings, a 1400-bed tertiary care hospital. METHODS: Using 191 fresh stool samples from adult patients, we evaluated the performance of Xpert C. difficile (Xpert CD), C. diff Quik Chek Complete (which simultaneously detects glutamate dehydrogenase [GDH] and C...
February 8, 2017: Journal of Clinical Laboratory Analysis
https://www.readbyqxmd.com/read/28173695/the-american-cockroach-peptide-periplanetasin-2-blocks-clostridium-difficile-toxin-a-induced-cell-damage-and-inflammation-in-the-gut
#13
Ji Hong, Peng Zhang, I Na Yoon, Jae Sam Hwang, Jin Ku Kang, Ho Kim
Clostridium difficile, which causes pseudomembranous colitis, releases toxin A and toxin B. These toxins are considered to be the main causative agents for the disease pathogenesis, and their expression is associated with a marked increase of apoptosis in mucosal epithelial cells. Colonic epithelial cells are believed to form a physical barrier between the lumen and the submucosa, and abnormally increased mucosal epithelial cell apoptosis is considered to be an initial step in gut inflammation responses. Therefore, one approach to treating pseudomembranous colitis would be to develop agents that block the mucosal epithelial cell apoptosis caused by toxin A, thus restoring barrier function and curing inflammatory responses in the gut...
February 7, 2017: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28172620/p390-open-label-study-to-evaluate-the-pharmacokinetics-of-fidaxomicin-in-inflammatory-bowel-disease-patients-with-clostridium-difficile-infection-the-profile-study-pharmacokinetics-analysis
#14
C Högenauer, Y Mahida, A Stallmach, P Marteau, G Rydzewska, V Ivashkin, P Gargalianos-Kakolyris, I Michon, N Adomakoh, W Reinisch
No abstract text is available yet for this article.
February 1, 2017: Journal of Crohn's & Colitis
https://www.readbyqxmd.com/read/28170133/optimal-strategies-for-the-diagnosis-of-community-onset-diarrhea-in-solid-organ-transplant-recipients-less-is-more
#15
Sonya A Trinh, Ignacio A Echenique, Sudhir Penugonda, Michael P Angarone
BACKGROUND: Diarrhea, a common complication after solid organ transplant (SOT), is associated with allograft failure and death. No evidence-based guidelines exist for the evaluation of diarrhea in SOT recipients. We performed a cost-analysis to derive a testing algorithm for the diagnosis of community-onset diarrhea that minimizes costs without compromising diagnostic yields. DESIGN: A cost-analysis was performed on a retrospective cohort of 422 SOT admissions for community-onset diarrhea over an 18-month period...
February 7, 2017: Transplant Infectious Disease: An Official Journal of the Transplantation Society
https://www.readbyqxmd.com/read/28169013/cost-analysis-of-an-outbreak-of-clostridium-difficile-infection-ribotype-027-in-a-dutch-tertiary-care-centre
#16
Y H van Beurden, M K Bomers, S D van der Werff, E A P M Pompe, S Spiering, C M J E Vandenbroucke-Grauls, C J J Mulder
BACKGROUND: The economic impact of Clostridium difficile infection (CDI) on the healthcare system is significant. From May 2013 to May 2014, an outbreak of C. difficile ribotype 027 occurred in a Dutch tertiary care hospital, involving 72 patients. The primary aim of this study was to provide insight into the financial burden that this CDI outbreak brought upon this hospital. METHODS: A retrospective analysis was performed to estimate the costs of a one-year-long C...
December 30, 2016: Journal of Hospital Infection
https://www.readbyqxmd.com/read/28167669/mucosal-antibodies-to-the-c-terminus-of-toxin-a-prevent-colonization-of-clostridium-difficile
#17
Huynh A Hong, Krisztina Hitri, Siamand Hosseini, Natalia Kotowicz, Donna Bryan, Fatme Mawas, Anthony J Wilkinson, Annie van Broekhoven, Jonathan Kearsey, Simon M Cutting
Mucosal immunity is considered important for protection to Clostridium difficile infection (CDI). We show that in hamsters immunized with Bacillus subtilis spores expressing a carboxy-terminal segment (TcdA26-39) of C. difficile toxin A no colonization occurs in protected animals when challenged with C. difficile strain 630. By contrast, animals immunized with toxoids showed no protection and remained fully colonized. As well as neutralizing toxins, antibodies to TcdA26-39 (but not to toxoids), whether raised to the recombinant protein, or to TcdA26-39 expressed on the B...
February 6, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/28166328/comparative-effectiveness-of-vancomycin-and-metronidazole-for-the-prevention-of-recurrence-and-death-in-patients-with-clostridium-difficile-infection
#18
Vanessa W Stevens, Richard E Nelson, Elyse M Schwab-Daugherty, Karim Khader, Makoto M Jones, Kevin A Brown, Tom Greene, Lindsay D Croft, Melinda Neuhauser, Peter Glassman, Matthew Bidwell Goetz, Matthew H Samore, Michael A Rubin
Importance: Metronidazole hydrochloride has historically been considered first-line therapy for patients with mild to moderate Clostridium difficile infection (CDI) but is inferior to vancomycin hydrochloride for clinical cure. The choice of therapy may likewise have substantial consequences on other downstream outcomes, such as recurrence and mortality, although these secondary outcomes have been less studied. Objective: To evaluate the risk of recurrence and all-cause 30-day mortality among patients receiving metronidazole or vancomycin for the treatment of mild to moderate and severe CDI...
February 6, 2017: JAMA Internal Medicine
https://www.readbyqxmd.com/read/28164522/detection-of-clostridium-difficile-in-fecal-specimens-a-comparative-evaluation-of-nucleic-acid-amplification-test-and-toxigenic-culture
#19
Shima Lotfian, Masoumeh Douraghi, Amir Aliramezani, Sedighe Ghourchian, Abdolfatah Sarrafnejad, Hojjat Zeraati
BACKGROUND: The available data regarding Clostridium difficile infections (CDIs) in developing countries are scarce. This may be related in part to the complexity of anaerobic bacterial culture and/or cytotoxicity assays of C. difficile. Here, we evaluated the diagnostic efficacy of PCR in comparison with toxigenic culture for direct detection of conserved genes as well as toxin genes of C. difficile in fecal specimens of patients with clinical symptoms of CDI. METHODS: Loose or soft feces from 171 patients suspected of having C...
October 1, 2016: Clinical Laboratory
https://www.readbyqxmd.com/read/28162100/lack-of-benefit-with-combination-therapy-for-clostridium-difficile-infection
#20
Jessica C Njoku, Trevor C Van Schooneveld, Mark E Rupp, Keith M Olsen, Fang Qiu, Jane L Meza, Elizabeth D Hermsen
Limited data exist regarding combination therapy for Clostridium difficile infection (CDI). After adjusting for confounders in a cohort of patients with CDI and≥1 year old, combination therapy was not associated with significant differences in clinical outcomes, but it was associated with prolonged duration of therapy (1.22 days; 95% confidence interval, 1.03-1.44 days; P=.02). Infect Control Hosp Epidemiol 2017;1-4.
February 6, 2017: Infection Control and Hospital Epidemiology
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