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Clostridium difficile AND PCR

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https://www.readbyqxmd.com/read/28219893/toxin-positive-clostridium-difficile-latently-infect-mouse-colonies-and-protect-against-highly-pathogenic-c-difficile
#1
Lucie Etienne-Mesmin, Benoit Chassaing, Oluwaseyi Adekunle, Lisa M Mattei, Frederic D Bushman, Andrew T Gewirtz
OBJECTIVE: Clostridium difficile is a toxin-producing bacterium and a leading cause of antibiotic-associated disease. The ability of C. difficile to form spores and infect antibiotic-treated persons at low multiplicity of infection (MOI) underlies its large disease burden. However, C. difficile-induced disease might also result from long-harboured C. difficile that blooms in individuals administered antibiotics. DESIGN: Mice purchased from multiple vendors and repeatedly testing negative for this pathogen by quantitative PCR bloomed C...
February 20, 2017: Gut
https://www.readbyqxmd.com/read/28215602/clostridium-difficile-infection-in-acute-flares-of-inflammatory-bowel-disease-a-prospective-study
#2
Harry Sokol, Valérie Lalande, Cecilia Landman, Anne Bourrier, Isabelle Nion-Larmurier, Sylvie Rajca, Julien Kirchgesner, Philippe Seksik, Jacques Cosnes, Frédéric Barbut, Laurent Beaugerie
OBJECTIVES: Clostridium difficile infection (CDI) is a common complication in inflammatory bowel disease (IBD) and has been associated with poor IBD outcome. The aims of our study were to look for predictive factors of CDI in patients hospitalized for IBD flare and to evaluate a rapid testing strategy in this population. METHODS: Consecutive patients hospitalized for IBD flare in Saint-Antoine Hospital (Paris, France) were prospectively tested for CDI with a defined strategy involving rapid testing and reference methods...
January 30, 2017: Digestive and Liver Disease
https://www.readbyqxmd.com/read/28192156/evaluation-of-two-novel-chemiluminescence-immunoassays-for-the-detection-of-clostridium-difficile-glutamate-dehydrogenase-and-toxin-a-b
#3
Annette Blaich, Reno Frei, Carine Castellano, Christine Kiessling, Angelika Geschke, Katharina M Rentsch, Adrian Egli
A novel immunoassay for Clostridium difficile glutamate dehydrogenase (GDH) and toxin A&B (LIAISON, DiaSorin) was compared to another GDH assay (Alere), PCR and toxigenic culture. The GDH-DiaSorin is slightly more sensitive than the GDH-Alere. Sensitivity of the Toxin-Diasorin test is in accordance to the sensitivity of other immunoassays in literature.
February 10, 2017: Journal of Microbiological Methods
https://www.readbyqxmd.com/read/28187144/a-mathematical-model-of-clostridium-difficile-transmission-in-medical-wards-and-a-cost-effectiveness-analysis-comparing-different-strategies-for-laboratory-diagnosis-and-patient-isolation
#4
Vered Schechner, Yehuda Carmeli, Moshe Leshno
BACKGROUND: Clostridium difficile infection (CDI) is a common and potentially fatal healthcare-associated infection. Improving diagnostic tests and infection control measures may prevent transmission. We aimed to determine, in resource-limited settings, whether it is more effective and cost-effective to allocate resources to isolation or to diagnostics. METHODS: We constructed a mathematical model of CDI transmission based on hospital data (9 medical wards, 350 beds) between March 2010 and February 2013...
2017: PloS One
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
#5
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/28181032/comprehensive-evaluation-of-chemiluminescent-immunoassays-for-the-laboratory-diagnosis-of-clostridium-difficile-infection
#6
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/28170133/optimal-strategies-for-the-diagnosis-of-community-onset-diarrhea-in-solid-organ-transplant-recipients-less-is-more
#7
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/28164522/detection-of-clostridium-difficile-in-fecal-specimens-a-comparative-evaluation-of-nucleic-acid-amplification-test-and-toxigenic-culture
#8
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/28145650/epidemiology-and-factors-related-to-clinical-severity-of-acute-gastroenteritis-in-hospitalized-children-after-the-introduction-of-rotavirus-vaccination
#9
Ahlee Kim, Ju Young Chang, Sue Shin, Hana Yi, Jin Soo Moon, Jae Sung Ko, Sohee Oh
We aimed to investigate epidemiology and host- and pathogen-related factors associated with clinical severity of acute gastroenteritis (AGE) in children after rotavirus vaccination introduction. Factors assessed included age, co-infection with more than 2 viruses, and virus-toxigenic Clostridium difficile co-detection. Fecal samples and clinical information, including modified Vesikari scores, were collected from hospitalized children with AGE. The presence of enteric viruses and bacteria, including toxigenic C...
March 2017: Journal of Korean Medical Science
https://www.readbyqxmd.com/read/28145453/high-prevalence-of-toxigenic-clostridium-difficile-in-public-space-lawns-in-western-australia
#10
Peter Moono, Su Chen Lim, Thomas V Riley
Clostridium difficile is a well-established hospital pathogen. Recently, it has been detected increasingly in patients without hospital contact. Given this rise in community associated infections with C. difficile, we hypothesized that the environment could play an important role in transmission of spores outside the hospital. Lawn samples (311) collected in public spaces in the metropolitan area of Perth, Western Australia, from February to June 2016 were cultured for C. difficile. C. difficile was isolated from the samples by direct and enrichment culture, and characterized by standard molecular methods using toxin gene PCR and ribotyping...
February 1, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28122874/is-follow-up-testing-with-filmarray-gastrointestinal-multiplex-pcr-panel-necessary
#11
Sholhui Park, Matthew M Hitchcock, Carlos A Gomez, Niaz Banaei
FilmArray GI Panel (BioFire Diagnostics, Salt Lake City, UT) is a simple, sample-to-answer, on-demand, multiplex, nucleic acid amplification test for syndromic diagnosis of infectious gastroenteritis. The aim of this study was to measure the yield of follow-up testing with FilmArray GI Panel within 4 weeks of an initial test. Consecutive adult and pediatric patients tested at an academic institution between August 2015 and June 2016 were included in this study. Of 145 follow-up tests in 106 unique patients with an initial negative result, 134 (92...
January 25, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28119780/prevalence-and-molecular-epidemiology-of-clostridium-difficile-infection-in-thailand
#12
P Putsathit, M Maneerattanaporn, P Piewngam, P Kiratisin, T V Riley
Little is known about Clostridium difficile infection (CDI) in Asia generally, and specifically in Thailand. Given the high prevalence of inappropriate antibiotic usage in this region, CDI is likely to be common. This study investigated the prevalence and molecular epidemiology of CDI in Thailand. Stool specimens collected from inpatients with diarrhoea at Siriraj hospital in Bangkok (n = 422) were cultured on ChromID Cdiff agar and any presumptive C. difficile colonies were identified, PCR ribotyped and toxin profiled...
January 2017: New Microbes and New Infections
https://www.readbyqxmd.com/read/28116592/clostridium-difficile-infection-and-patient-specific-antimicrobial-resistance-testing-reveals-a-high-metronidazole-resistance-rate
#13
Jodie A Barkin, Daniel A Sussman, Nimita Fifadara, Jamie S Barkin
BACKGROUND: Clostridium difficile (CD) infection (CDI) causes marked morbidity and mortality, accounting for large healthcare expenditures annually. Current CDI treatment guidelines focus on clinical markers of patient severity to determine the preferred antibiotic regimen of metronidazole versus vancomycin. The antimicrobial resistance patterns for patients with CD are currently unknown. AIM: The aim of this study was to define the antimicrobial resistance patterns for CD...
January 23, 2017: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/28110780/subtyping-and-antimicrobial-susceptibility-of-clostridium-difficile-pcr-ribotype-078-126-isolates-of-human-and-animal-origin
#14
Sergio Álvarez-Pérez, José L Blanco, Celine Harmanus, Ed Kuijper, Marta E García
The Clostridium difficile PCR ribotype complex 078/126 (RT078/126) is often involved in human disease and is also frequently isolated from diverse animal species. The high genetic relatedness between human and animal RT078/126 isolates found in different regions has encouraged discussion about the zoonotic potential of this lineage. We compared for the first time the genetic diversity and antimicrobial susceptibility profiles of human and animal C. difficile RT078/126 isolates from Spain. A collection of 96 isolates (50 of human and 46 of animal origin; 63 and 33 of ribotypes 078 and 126, respectively) was subtyped by an improved amplified fragment length polymorphism (AFLP) fingerprinting method and tested for in vitro antimicrobial susceptibility...
February 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28087170/clostridium-difficile-rates-in-asymptomatic-and-symptomatic-hospitalized-patients-using-nucleic-acid-testing
#15
Cynthia Truong, Lee F Schroeder, Rajiv Gaur, Victoria Emma Anikst, Ikuko Komo, Colleen Watters, Erin McCalley, Carole Kulik, David Pickham, Nancy J Lee, Niaz Banaei
BACKGROUND: The Clostridium difficile rate in symptomatic patients represents both those with C. difficile infection (CDI) and those with colonization. To predict the extent of CDI overdiagnosis, we compared the asymptomatic colonization rate to the symptomatic positivity rate in hospitalized patients using nucleic acid testing. METHODS: Between July 2014 and April 2015, formed stool samples were collected from asymptomatic patients after admission to 3 hospital wards at the Stanford Hospital...
January 3, 2017: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/28054289/procalcitonin-is-a-poor-predictor-of-non-infectious-fever-in-the-neurocritical-care-unit
#16
Karin Halvorson, Sameer Shah, Corey Fehnel, Bradford Thompson, N Stevenson Potter, Mitchell Levy, Linda Wendell
BACKGROUND: Fever is a common occurrence in the Neurocritical Care Unit (NCCU). It is reported that up to 50 % of these fevers are associated with a non-infectious source. As this is a diagnosis of exclusion, a complete fever evaluation must be done to rule out infection. Procalcitonin (PCT) has been identified as a possible biomarker to distinguish infectious from non-infectious etiologies of fever. We hypothesized that PCT could be used as a predictor of infectious fever in febrile patients with intracranial hemorrhage admitted to the NCCU...
January 4, 2017: Neurocritical Care
https://www.readbyqxmd.com/read/28031436/comparative-genome-analysis-and-global-phylogeny-of-the-toxin-variant-clostridium-difficile-pcr-ribotype-017-reveals-the-evolution-of-two-independent-sub-lineages
#17
M D Cairns, M D Preston, C L Hall, D N Gerding, P M Hawkey, H Kato, H Kim, E J Kuijper, T D Lawley, H Pituch, S Reid, B Kullin, T V Riley, K Solomon, P J Tsai, J S Weese, R A Stabler, B W Wren
The diarrhoeal pathogen Clostridium difficile consists of at least six distinct evolutionary lineages. The RT017 lineage is anomalous as strains only express toxin B, compared to strains from other lineages that produce toxins A and B and occasionally binary toxin. Historically, RT017 were initially reported in Asia but have now been reported worldwide. We used whole genome sequencing and phylogenetic analysis to investigate the patterns of global spread and population structure of 277 RT017 isolates from animal and human origins from six continents, isolated between 1990 and 2013...
December 28, 2016: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28018325/sensitive-quantitative-analysis-of-the-meconium-bacterial-microbiota-in-healthy-term-infants-born-vaginally-or-by-cesarean-section
#18
Ravinder Nagpal, Hirokazu Tsuji, Takuya Takahashi, Kazunari Kawashima, Satoru Nagata, Koji Nomoto, Yuichiro Yamashiro
For decades, babies were thought to be born germ-free, but recent evidences suggest that they are already exposed to various bacteria in utero. However, the data on population levels of such pioneer gut bacteria, particularly in context to birth mode, is sparse. We herein aimed to quantify such bacteria from the meconium of 151 healthy term Japanese infants born vaginally or by C-section. Neonatal first meconium was obtained within 24-48 h of delivery; RNA was extracted and subjected to reverse-transcription-quantitative PCR using specific primers for Clostridium coccoides group, C...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28002482/clinical-characteristics-and-treatment-outcomes-of-clostridium-difficile-infections-by-pcr-ribotype-017-and-018-strains
#19
Jieun Kim, Yeonjae Kim, Hyunjoo Pai
The objective of this study was to identify the clinical characteristics of Clostridium difficile infections (CDIs) caused by toxin A-negative/toxin B-positive (A-B+) PCR ribotype 017 (R017) and A+B+ ribotype 018 (R018) strains, prevalent in Asian countries. From February 2010 through January 2013, all CDI patients in our hospital were enrolled; their medical records were retrospectively reviewed, and the isolates were characterized by toxigenic culture and PCR ribotyping. Based on the ribotypes, a total of 510 cases were categorized as R017 (139, 27...
2016: PloS One
https://www.readbyqxmd.com/read/27999477/detection-ribotyping-and-antimicrobial-resistance-properties-of-clostridium-difficile-strains-isolated-from-the-cases-of-diarrhea
#20
Samaneh Kouzegaran, Mahmood Ganjifard, Amir Saber Tanha
BACKGROUND: Clostridium difficile is the most prevalent cause of antibiotic-associated infectious diarrhea al-around the world. Prevalence of virulent and resistant strains of Clostridium difficile is increasing now a day. The present investigation was carried out to study the prevalence, ribotyping and antibiotic resistance pattern of C. difficile isolated from diarrheic and non-diarrheic pediatrics. MATERIALS AND METHODS: Four-hundred stool specimens were collected from the diarrheic and non-diarrheic pediatrics hospitalized due to the diseases other than diarrhea...
October 2016: Materia Socio-medica
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