Abstract:
:Recent genomic analysis of an epidemic ribotype 027 (RT027) Clostridioides difficile strain revealed the presence of several chromosomal site-specific invertible sites hypothesized to control the expression of adjacent genes in a bimodal on-off mode. This process, named phase variation, is thought to enhance phenotypic variability under homogeneous conditions ultimately increasing population fitness in unpredictable environmental fluctuations. The full extent of phase variation mediated by DNA-inversions in C. difficile is currently unknown. Here, we sought to expand our previous analysis by screening for site-specific inversions in isolates that belong to the rapidly emerging ribotypes RT017 and RT078. We report the finding of one novel inversion site for which we demonstrate the inversion potential and quantify inversion proportions during exponential and stationary growth in both historic and modern isolates of the same ribotype. We then employ a computational approach to assess the prevalence of all sites identified so far in a large collection of sequenced C. difficile isolates. We show that phase-variable loci are widespread with some sites being present in virtually all analyzed strains. Furthermore, in our small subset of RT017 and RT078 strains, we detect no evidence of gain or loss of invertible sites in historic versus modern isolates demonstrating the relative stability of those genomic elements. Overall, our results support the idea that C. difficile has adopted phase variation mediated by DNA inversions as its major generator of diversity which could be beneficial during the pathogenesis process.
journal_name
Anaerobejournal_title
Anaerobeauthors
Sekulovic O,Bourgeois J,Shen A,Camilli Adoi
10.1016/j.anaerobe.2019.102073subject
Has Abstractpub_date
2019-12-01 00:00:00pages
102073eissn
1075-9964issn
1095-8274pii
S1075-9964(19)30123-4journal_volume
60pub_type
杂志文章相关文献
ANAEROBE文献大全abstract::Staphylococcus aureus is an opportunistic pathogen that can colonize human and animal intestinal tracts, causing certain gastrointestinal diseases. The adherence of enteric pathogens to host intestinal epithelial cells is important for their pathogenesis. In the present study, Lactobacillus salivarius and Lactobacillu...
journal_title:Anaerobe
pub_type: 杂志文章
doi:10.1016/j.anaerobe.2012.08.001
更新日期:2012-10-01 00:00:00
abstract::This study examined whether different corn silage to grass silage ratios in ruminant rations and different grinding levels of the feed affect the composition of the ruminal Bacteroides-Prevotella community in vitro. Three diets, composed of 10% soybean meal as well as of different corn silage and grass silage proporti...
journal_title:Anaerobe
pub_type: 杂志文章
doi:10.1016/j.anaerobe.2010.05.002
更新日期:2010-08-01 00:00:00
abstract::Prevotella (formerly Bacteroides) ruminicola is a numerous rumen bacterium which plays a significant role in the metabolism of proteins and peptides in the rumen. Measurement of the hydrolysis of synthetic aminopeptidase substrates by sonicated extracts and whole cells of different species of rumen bacteria indicated ...
journal_title:Anaerobe
pub_type: 杂志文章
doi:10.1006/anae.1996.0065
更新日期:1997-02-01 00:00:00
abstract::Prevotella species are members of the bacterial oral flora and are opportunistic pathogens in polymicrobial infections of soft tissues. Antibiotic resistance to tetracyclines is common in these bacteria, and the gene encoding this resistance has been previously identified as tetQ. The tetQ gene is also found on conjug...
journal_title:Anaerobe
pub_type: 杂志文章
doi:10.1016/j.anaerobe.2010.08.008
更新日期:2010-12-01 00:00:00
abstract::Analysis of restriction and modification activities in natural population of Selenomonas ruminantium have revealed the prevalence of CTGCAG (Pst I isoschizomers) recognizing restriction and/or modification systems in these bacteria. Pst I isoschizomeric restriction endonucleases were detected in 4 out of 15 strains te...
journal_title:Anaerobe
pub_type: 杂志文章
doi:10.1006/anae.1998.0180
更新日期:1999-02-01 00:00:00
abstract::Some Australian strain types of Clostridium difficile appear unique, highlighting the global diversity of this bacterium. We examined recent and historic local isolates, finding predominantly toxinotype 0 strains, but also toxinotypes V and VIII. All isolates tested were susceptible to vancomycin and metronidazole, wh...
journal_title:Anaerobe
pub_type: 杂志文章
doi:10.1016/j.anaerobe.2015.05.001
更新日期:2015-08-01 00:00:00
abstract:OBJECTIVES:To determine the impact of the 2018 introduction of nucleic acid amplification tests (NAATs) for C. difficile detection on the laboratory diagnosis of C. difficile infection (CDI), and the distribution of C. difficile ribotypes. METHODS:A retrospective analysis of five years (2015-2019) of C. difficile diag...
journal_title:Anaerobe
pub_type: 杂志文章
doi:10.1016/j.anaerobe.2020.102313
更新日期:2020-12-09 00:00:00
abstract::The recognition of the pathogenicity of Cutibacterium acnes in implant-associated infection is not always obvious. In this paper, we aimed to distinguish pathogenic and non-pathogenic C. acnes isolates. To reach this goal, we investigated the clonal complex (CC) of a large collection of C. acnes clinical isolates thro...
journal_title:Anaerobe
pub_type: 杂志文章
doi:10.1016/j.anaerobe.2017.04.009
更新日期:2017-10-01 00:00:00
abstract::Here, we sought to assess the levels of antibiotic resistance among intestinal Bacteroides and Parabacteroides strains collected between 2014 and 2016 in Europe and also attempted to compare resistance levels between clinical and commensal isolates. Bacteroides and Parabacteroides isolates were recovered from faecal s...
journal_title:Anaerobe
pub_type: 杂志文章
doi:10.1016/j.anaerobe.2020.102182
更新日期:2020-04-01 00:00:00
abstract::A postanginal Sepsis Syndrome with metastatic lung abscess caused by Fusobacterium necrophorumin a 25-year-old previously healthy man is described. The incomplete and ineffective antibiotic treatment at onset of angina ended progressively in septicaemia and metastatic infections in a 3-week time period. The early pare...
journal_title:Anaerobe
pub_type: 杂志文章
doi:10.1006/anae.1997.0092
更新日期:1997-04-01 00:00:00
abstract::We describe 84 clinical isolates of Prevotella timonensis recovered between January 2007 and November 2016 at the University Hospital of Montpellier. They were recovered from a variety of clinical samples, mostly of genital and wound origins. All isolates were isolated from a mixed aerobic and anaerobic microbiota. An...
journal_title:Anaerobe
pub_type: 杂志文章
doi:10.1016/j.anaerobe.2018.01.002
更新日期:2018-04-01 00:00:00
abstract::Post-sternotomy mediastinitis, a nosocomial infection mostly caused by staphylococci, can be life-threatening. A case of mediastinitis due to Finegoldia magna after a coronary artery bypass graft surgery was reviewed. Although this bacterium is difficult to be isolated from routine blood cultures, a F. magna bacteriem...
journal_title:Anaerobe
pub_type: 杂志文章
doi:10.1016/j.anaerobe.2014.11.012
更新日期:2015-04-01 00:00:00
abstract::Novel polymerase chain reaction (PCR) primers designed from the 16S-23S internal transcription spacer (ITS) rRNA and 23S rRNA genes, respectively, were used for the specific detection of Lactobacillus acidophilus and Lactobacillus plantarum. Molecular weights of the PCR products were 221 and 599 bp, respectively. Stra...
journal_title:Anaerobe
pub_type: 杂志文章
doi:10.1016/j.anaerobe.2010.01.003
更新日期:2010-06-01 00:00:00
abstract::A 750 m(3) anaerobic digester was studied over a half year period including a shift from good reactor performance to a reduced one. Various abiotic parameters like volatile fatty acids (VFA) (formic-, acetic-, propionic-, (iso-)butyric-, (iso-)valeric-, lactic acid), total C, total N, NH4 -N, and total proteins, as we...
journal_title:Anaerobe
pub_type: 杂志文章
doi:10.1016/j.anaerobe.2014.03.012
更新日期:2014-10-01 00:00:00
abstract::The chemostat model has been an important tool in studying intestinal microflora. To date, several competitive exclusion products have been developed from such studies as prophylactic treatment against pathogenic bacteria. A continuous-flow chemostat model of a feral pig was developed using inocula from the cecal cont...
journal_title:Anaerobe
pub_type: 杂志文章
doi:10.1016/j.anaerobe.2007.03.003
更新日期:2007-06-01 00:00:00
abstract::In order to study the microbial caecal ecosystem of wild and domestic rabbits through the fermentation characteristics and concentration and diversity of bacterial and archaeal communities, caecal samples from sixteen wild rabbits (WR) were contrasted with two groups (n = 4) of farm rabbits receiving low (LSF) or high...
journal_title:Anaerobe
pub_type: 杂志文章
doi:10.1016/j.anaerobe.2012.04.004
更新日期:2012-06-01 00:00:00
abstract::The objective of this work was to compare the biomass and community structure of bacteria, protozoa and archaea communities in samples of rumen and faeces of goats and to what extent the diet (alfalfa hay with or without supplemented oats) offered to them exert an influence. Four cannulated adult goats fistulated in t...
journal_title:Anaerobe
pub_type: 杂志文章
doi:10.1016/j.anaerobe.2013.11.012
更新日期:2014-10-01 00:00:00
abstract::Recent surveys indicate that the majority of toxigenic Clostridium difficile strains isolated in European hospitals belonged to PCR-ribotypes (RTs) different from RT 027 or RT 078. Among these types, RT 018 has been reported in Italy and, more recently, in Korea and Japan. In Italy, strains RT 018 have become predomin...
journal_title:Anaerobe
pub_type: 杂志文章
doi:10.1016/j.anaerobe.2016.10.003
更新日期:2016-12-01 00:00:00
abstract::A serodiagnostic ELISA (rL-ELISA) using recombinant truncated leukotoxin protein PL2 (aa 311-644) of Fusobacterium necrophorum as antigen was developed for detection of antibodies against F. necrophorum from cattle footrot. In rL-ELISA, the recombinant diagnostic antigen showed no cross-reaction with antisera against ...
journal_title:Anaerobe
pub_type: 杂志文章
doi:10.1016/j.anaerobe.2010.03.007
更新日期:2010-08-01 00:00:00
abstract::Bacterial pathogens have adopted numerous mechanisms for acquiring iron from host proteins during an infection, including the direct acquisition of ferric iron from heme-associated proteins or from iron-scavenging siderophores. Ferric iron then is transported into the cytosol, where it can be utilized by the bacterial...
journal_title:Anaerobe
pub_type: 杂志文章
doi:10.1016/j.anaerobe.2016.05.005
更新日期:2016-10-01 00:00:00
abstract::In recent decades, obesity has become one of the most common lifestyle-associated disorders. Obesity is a major contributing factor for several other lifestyles associated disorders such as type 2 diabetes mellitus, hypertension, and cardiovascular disease. Although genetics and lifestyle have been directly implicated...
journal_title:Anaerobe
pub_type: 杂志文章,评审
doi:10.1016/j.anaerobe.2020.102248
更新日期:2020-08-14 00:00:00
abstract::The extracellular matrix protein fibronectin (Fn) is known to bind to the surface of Clostridium perfringens cells. Fn is a disulfide-linked homodimer protein, with each Fn polypeptide consisting of three types of repeating modules: 12 type I, 2 type II, and 15-17 type III modules. To determine the epitope on Fn recog...
journal_title:Anaerobe
pub_type: 杂志文章
doi:10.1016/j.anaerobe.2014.11.007
更新日期:2015-08-01 00:00:00
abstract::The aim of the study was to purify the exopolysaccharides (EPS) produced from Bifidobacterium animalis RH, which was isolated from the feces of Bama centenarians in Guangxi of China, and evaluate their antioxidant activities in vitro and in vivo. 2 fractions, a neutral EPS fraction (EPSa) and an acidic EPS fraction (E...
journal_title:Anaerobe
pub_type: 杂志文章
doi:10.1016/j.anaerobe.2011.07.010
更新日期:2011-10-01 00:00:00
abstract::The toxic effects of heavy metals have been extensively documented in different organisms. Nevertheless, a lack of information exists with regard to this topic in the case of autochthonous microorganism communities. The aim of this study was to evaluate the toxic effects of zinc on the anaerobic microorganisms present...
journal_title:Anaerobe
pub_type: 杂志文章
doi:10.1016/j.anaerobe.2007.01.001
更新日期:2007-04-01 00:00:00
abstract::Physiological changes in populations of Clostridium beijerinckii and Clostridium tetanomorphum were monitored by fluorescence staining and flow cytometry. To estimate the number of metabolically active cells in exponential growth, a combination of the dyes propidium iodide and carboxy fluorescein diacetate appeared to...
journal_title:Anaerobe
pub_type: 杂志文章
doi:10.1016/j.anaerobe.2013.10.006
更新日期:2014-10-01 00:00:00
abstract::Linezolid is a novel oxazolidinone antibacterial agent active against staphylococci (including methicillin-resistant strains), enterococci (including vancomycin-resistant strains), streptococci (including penicillin-intermediate and -resistant Streptococcus pneumoniae), and other aerobic and facultative bacteria. The ...
journal_title:Anaerobe
pub_type: 杂志文章
doi:10.1016/S1075-9964(03)00004-0
更新日期:2003-02-01 00:00:00
abstract::Chronic periodontitis is a highly prevalent endogenous polymicrobial disease. To better understand the etiology of the disease a quantitative approach is mandatory and real-time PCR is the molecular technique currently preferred to achieve this purpose. Taking into account that such a kind of study is still scarce, we...
journal_title:Anaerobe
pub_type: 杂志文章
doi:10.1016/j.anaerobe.2010.02.007
更新日期:2010-06-01 00:00:00
abstract::Aspiration pneumonia is an infectious disease of the lungs caused by inhalation of saliva or foods, associated with swallowing dysfunction. Therefore, the major causative organisms are oral or gastric bacteria. In this study, we evaluated the antimicrobial susceptibility patterns of the anaerobic bacteria which can ca...
journal_title:Anaerobe
pub_type: 杂志文章
doi:10.1016/j.anaerobe.2019.04.002
更新日期:2019-06-01 00:00:00
abstract:BACKGROUND:Mammalian gut microbiota have been implicated in a variety of functions including the breakdown of ingested nutrients, the regulation of energy intake and storage, the control of immune system development and activity, and the synthesis of novel chemicals. Previous studies have shown that feeding mammalian h...
journal_title:Anaerobe
pub_type: 杂志文章
doi:10.1016/j.anaerobe.2012.02.004
更新日期:2012-06-01 00:00:00
abstract::Specimens from 32 pustular acne lesions that were inoculated on media supportive for the growth of aerobic and anaerobic bacteria showed bacterial growth. Only aerobic or facultative bacteria were recovered in 15 (47%) specimens, only anaerobic bacteria in 11 (34%) specimens, and mixed aerobic and anaerobic bacteria i...
journal_title:Anaerobe
pub_type: 杂志文章
doi:10.1006/anae.1995.1031
更新日期:1995-12-01 00:00:00