Anaerobe

Article	Citations
Association between the gut and oral microbiome with obesity	58
Clostridioides difficile infection (CDI) during the COVID-19 pandemic	37
Porphyromonas: A neglected potential key genus in human microbiomes	31
Clostridium innocuum: Microbiological and clinical characteristics of a potential emerging pathogen	29
Inhibitory effect of LL-37 and human lactoferricin on growth and biofilm formation of anaerobes associated with oral diseases	25
Development and application of aerobic, chemically defined media for Dysgonomonas	25
Toxinotyping and molecular characterization of antimicrobial resistance in Clostridium perfringens isolated from different sources of livestock and poultry	24
Did Clostridioides difficile testing and infection rates change during the COVID-19 pandemic?	23
The burden of Clostridioides difficile infection in COVID-19 patients: A systematic review and meta-analysis	23
Archaea from the gut microbiota of humans: Could be linked to chronic diseases?	22
Rumen bacterial diversity in relation to nitrogen retention in beef cattle	22
Anaerobic bloodstream infections in Italy (ITANAEROBY): A 5-year retrospective nationwide survey	21
Bioactive coatings for dental implants: A review of alternative strategies to prevent peri-implantitis induced by anaerobic bacteria	21
Oral infection with a periodontal pathogen alters oral and gut microbiomes	21
Reconsidering the in vivo functions of Clostridial Stickland amino acid fermentations	20
Anaerobic bacterial communities associated with oral carcinoma: Intratumoral, surface-biofilm and salivary microbiota	19
Genomic basis of antimicrobial resistance in non-toxigenic Clostridium difficile in Southeast Asia	19
Porphyromonas spp. have an extensive host range in ill and healthy individuals and an unexpected environmental distribution: A systematic review and meta-analysis	19
Antimicrobial susceptibility profiles of invasive isolates of anaerobic bacteria from a large Canadian reference laboratory: 2012–2019	19
Bacteremia caused by Veillonella dispar in an oncological patient	19
Carbapenem resistance in Bacteroides fragilis: A review of molecular mechanisms	19
Unravelling the eco-specificity and pathophysiological properties of Cutibacterium species in the light of recent taxonomic changes	18
Non-oral Prevotella stepping into the spotlight	18
The alterations of microbiota and pathological conditions in the gut of patients with colorectal cancer undergoing chemotherapy	18
Dogs are carriers of Clostridioides difficile lineages associated with human community-acquired infections	17

Anaerobic biodegradation of fluoxetine using a high-performance bacterial community	17
A cortex-specific penicillin-binding protein contributes to heat resistance in Clostridioides difficile spores	16
Comparative genomic analysis and proposal of Clostridium yunnanense sp. nov., Clostridium rhizosphaerae sp. nov., and Clostridium paridis sp. nov., three novel Clostridium sensu stricto endophytes wit	15
Clostridioides difficile in Latin America: A comprehensive review of literature (1984–2021)	15
Phylum Synergistetes in the oral cavity: A possible contributor to periodontal disease	15
A novel in situ methodology for visual detection of Clostridium perfringens in pork harnessing saltatory rolling circle amplification	14
Septic arthritis caused by Desulfovibrio desulfuricans: A case report and review of the literature	14
UK Bacteroides species surveillance survey: Change in antimicrobial resistance over 16 years (2000–2016)	14
FN3 protein fragment containing two type III fibronectin domains from B. longum GT15 binds to human tumor necrosis factor alpha in vitro	14
A culture-based and culture-independent approach to the study of landfill leachate bacterial and archaeal communities	14
Physicochemical stressors and mixed alkaloid supplementation modulate ruminal microbiota and fermentation in vitro	14
Clostridioides difficile epidemiology in the Middle and the Far East	13
Urinary tract infections: Should we think about the anaerobic cocci?	13
An outbreak of Clostridioides difficile infections due to a 027-like PCR ribotype 181 in a rehabilitation centre: Epidemiological and microbiological characteristics	13
Correlation between antibiotic resistance and clinical outcome of anaerobic infections; mini-review	13
Chalcones with potential antibacterial and antibiofilm activities against periodontopathogenic bacteria	13
A narrative review of Clostridioides difficile infection in China	12
Rumen and fecal microbial profiles in cattle fed high lignin diets using metagenome analysis	12
The role of anaerobic bacteria in the development and prevention of colorectal cancer: A review study	12
Role of a probiotic strain in the modulation of gut microbiota and cytokines in inflammatory bowel disease	12
First description of abdominal infection due to Alistipes onderdonkii	12
What's a SNP between friends: The lineage of Clostridioides difficile R20291 can effect research outcomes	12
Human gut-derived commensal suppresses generation of T-cell response to gliadin in humanized mice by modulating gut microbiota	12
Impact of smokeless tobacco-associated bacteriome in oral carcinogenesis	12
Fecal microbiota transplantation as therapy for recurrent Clostridioides difficile infection is associated with amelioration of delirium and accompanied by changes in fecal microbiota and the metabolo	11
Clostridioides difficile on dairy farms and potential risk to dairy farm workers	11
Antimicrobial resistance progression in the United Kingdom: A temporal comparison of Clostridioides difficile antimicrobial susceptibilities	11
Clostridioides difficile epidemiology in India	11
Type 2 cytokines IL-4 and IL-5 reduce severe outcomes from Clostridiodes difficile infection	11
Multiple hepatic and brain abscesses caused by Parvimonas micra: A case report and literature review	11
Clostridium perfringens α-toxin specifically induces endothelial cell death by promoting ceramide-mediated apoptosis	11
Peptostreptococcus anaerobius: Pathogenicity, identification, and antimicrobial susceptibility. Review of monobacterial infections and addition of a case of urinary tract infection directly identified	10
Impact of MALDI-TOF MS identification on anaerobic species and genus diversity in routine diagnostics	10
Fusobacterium necrophorum oral infections – A need for guidance	10
Oxalobacter formigenes: A new hope as a live biotherapeutic agent in the management of calcium oxalate renal stones	10
Targeting antibiotic tolerance in anaerobic biofilms associated with oral diseases: Human antimicrobial peptides LL-37 and lactoferricin enhance the antibiotic efficacy of amoxicillin, clindamycin and	10
Inhibitory effect of d-arabinose on oral bacteria biofilm formation on titanium discs	10
Clostridioides difficile carriage in animals and the associated changes in the host fecal microbiota	10
Bacteroides and related species: The keystone taxa of the human gut microbiota	10
Clostridioides difficile infection in Africa: A narrative review	10
Unravelling of nitric oxide signalling: A potential biomarker with multifaceted complex mechanism associated with canine inflammatory bowel disease (IBD)	10
Isolation, toxinotyping and antimicrobial susceptibility testing of Clostridium perfringens isolated from Pakistan poultry	10
Identification of Clostridium innocuum hypothetical protein that is cross-reactive with C. difficile anti-toxin antibodies	10
Molecular epidemiology of endemic Clostridioides difficile infection in Japan	10
Label-free quantitative proteomic analysis of the oral bacteria Fusobacterium nucleatum and Porphyromonas gingivalis to identify protein features relevant in biofilm formation	9
In vitro fermentation and isolation of heparin-degrading bacteria from human gut microbiota	9
Phenotypic and genotypic antimicrobial resistance profiles of fecal lactobacilli from domesticated pigeons in Poland	9
Prevalence, toxin-typing and antimicrobial susceptibility of Clostridium perfringens in sheep with different feeding modes from Gansu and Qinghai provinces, China	9
Systems biology evaluation of refractory Clostridioides difficile infection including multiple failures of fecal microbiota transplantation	9
Etiology and antimicrobial susceptibility profiles of anaerobic bacteria isolated from clinical samples in a university hospital in Madrid, Spain	9

Methotrexate promotes recovery of arthritis-induced alveolar bone loss and modifies the composition of the oral-gut microbiota	9
Detection of beta-lactamase production in clinical Prevotella species by MALDI-TOF MS method	9
Leukotoxin production by Fusobacterium necrophorum strains in relation to severity of liver abscesses in cattle	9
Comparative evaluation of agar dilution and broth microdilution by commercial and in-house plates for Bacteroides fragilis group: An economical and expeditious approach for resource-limited settings	9
Misidentification of Phocaeicola (Bacteroides) dorei in two patients with bacteremia	9
Prevalence, molecular characterization, and antimicrobial resistance profile of Clostridium perfringens from India: A scoping review	9
Clostridioides difficile spores stimulate inflammatory cytokine responses and induce cytotoxicity in macrophages	9
Antibiotic susceptibility and biofilm-forming ability of Veillonella strains	8
Antimicrobial susceptibility pattern of oral gram negative anaerobes from Indian subjects	8
Bioaugmentation with methanogens cultured in a micro-aerobic microbial community for overloaded anaerobic digestion recovery	8
Cutibacterium acnes biofilm forming clinical isolates modify the formation and structure of Staphylococcus aureus biofilms, increasing their susceptibility to antibiotics	8
Prevalence and characterization of Clostridium perfringens isolated from different chicken farms in China	8
Flexible feeding in anaerobic digestion – Impact on process stability, performance and microbial community structures	8
Implementation of a Clostridioides difficile sentinel surveillance system in Germany: First insights for 2019–2021	8
Evaluation of the expression and immunogenicity of four versions of recombinant Clostridium perfringens beta toxin designed by bioinformatics tools	8
Antimicrobial susceptibility testing of anaerobic bacteria: In routine and research	8
Predominance of Clostridioides difficile PCR ribotype 181 in northern Greece, 2016–2019	8
Three cases of Sutterella wadsworthensis bacteremia secondary to abdominal infections	8
Akkermansia muciniphila and host interaction within the intestinal tract	8
Transmission of toxigenic Clostridiodes difficile between a pet dog with diarrhea and a 10-month-old infant	8
Diversity of genomic clusters and CfiA/cfiA alleles in Bacteroides fragilis isolates from human and animals	8
Detection of co-infection of Gardnerella vaginalis and Atopobium vaginae using qualitative PCR: A better predictor of bacterial vaginosis	8
First description of Lachnoanaerobaculum orale as a possible cause of human bacteremia	8
Clinical anaerobic infections in an Indian tertiary care hospital: A two-year retrospective study	7
Production and purification of Clostridium perfringens type D epsilon toxin and IgY antitoxin	7
A novel case of bilateral tubo-ovarian abscesses attributed to Ruminococcus gnavus without gastrointestinal involvement	7
Visualization of fidaxomicin association with the exosporium layer of Clostridioides difficile spores	7
The potential role of molecular mimicry by the anaerobic microbiota in the aetiology of autoimmune disease	7
Impact of COVID-19 pandemic on prevalence of Clostridioides difficile infection in a UK tertiary centre	7
Add-on interventions for the prevention of recurrent Clostridioides Difficile infection: A systematic review and network meta-analysis	7
Spore-forming properties and enhanced oxygen tolerance of butyrate-producing Anaerostipes spp.	7
The role of short-chain fatty acids in Clostridioides difficile infection: A review	7
Highbush blueberry proanthocyanidins alleviate Porphyromonas gingivalis-induced deleterious effects on oral mucosal cells	7
Hospitalized patients with diarrhea: Rate of Clostridioides difficile infection underdiagnosis and drivers of clinical suspicion	7
A metagenomic assessment of microbial communities in anaerobic bioreactors and sediments: Taxonomic and functional relationships	7
Molecular characterization of metronidazole resistant Bacteroides strains from Kuwait	7
Microbiological features, epidemiology, and clinical presentation of Clostridioides difficile strains from MLST Clade 2: A narrative review	7
Prevalence of Clostridioides difficile associated diarrhea in hospitalized patients in five Brazilian centers: A multicenter, prospective study	7
Carriage of Clostridioides difficile in healthy infants in the community of Handan, China: A 1-year follow-up study	7
Risk factors of first recurrence of Clostridioides difficile infection	7
Brain abscess mimicking acute stroke syndrome caused by dual Filifactor alocis and Porphyromonas gingivalis infections: A case report	7
Population-based incidence of hospitalized Clostridioides difficile infection among older adults in Ota-ku, Japan: A prospective surveillance study	6
The first case of Veillonella atypica bacteremia in a patient with renal pelvic tumor	6
Evaluation of different antigenic preparations against necrotic enteritis in broiler birds using a novel Clostridium perfringens type G strain	6
Gardnerella vaginalis in urinary tract infections, are men spared?	6
Brain abscesses caused by anaerobic bacteria	6
Growth of succinate consumer Dialister hominis is supported by Bacteroides thetaiotaomicron	6
MALDI-TOF MS: An alternative approach for ribotyping Clostridioides difficile isolates in Brazil	6
Fusobacterium watanabei sp. nov. As additional species within the genus Fusobacerium, isolated from human clinical specimens	6
Clinical and microbiological features of anaerobic implant-related infection in 80 patients after orthopedic surgery	6
Antibiotic susceptibility screening of primate-associated Clostridium ventriculi	6
Inhibitory effect of Brazilian red propolis on planktonic and biofilm forms of Clostridioides difficile	6
Detailed analysis of metabolism reveals growth-rate-promoting interactions between Anaerostipes caccae and Bacteroides spp.	6
Impact of COVID19 pandemic on the incidence of health-care associated Clostridioides difficile infection	6
Comparative evaluation of MALDI-TOF MS and 16S rRNA gene sequencing for the identification of clinically relevant anaerobic bacteria: critical evaluation of discrepant results	6
Expanding the repertoire of counterselection markers for markerless gene deletion in the human gut bacterium Phocaeicola vulgatus	6
Effects of different culture media on growth of Treponema spp. isolated from digital dermatitis	6
Clostridium perfringens α-toxin inhibits myogenic differentiation of C2C12 myoblasts	6
A rare case of Clostridium paraputrificum bacteremia in a 78-year-old Caucasian man diagnosed with an intestinal neoplasm	6
Six cases of Solobacterium moorei isolated alone or in mixed culture in Hungary and comparison with previously published cases	6
Identification of oral anaerobic bacteria and the beta-lactamase resistance genes from Iranian patients with periodontitis	6
Comparative clinical outcomes evaluation of hospitalized patients infected with Clostridioides difficile ribotype 106 vs. other toxigenic strains	6
First reported case of Robinsoniella peoriensis pyometra and bloodstream infection: A case report and review of the literature	6
Norepinephrine induces growth of Desulfovibrio vulgaris in an iron dependent manner	6
Genetic and phenotypic characteristics of Clostridium (Clostridioides) difficile from canine, bovine, and pediatric populations	5
Native joint infections caused by Parvimonas micra	5
Prevalence, toxinotyping, antimicrobial susceptibility and biofilm-forming ability of Clostridium perfringens isolated from free-living rodents and shrews	5
Geographical differences in tonsillar carriage rates of Fusobacterium necrophorum – A cross-sectional study in Sweden and Zambia	5
Sepsis caused by Anaerococcus nagyae after transarterial-chemoembolization for hepatocellular carcinoma: Case report and literature review	5
Development and clinical validation of an automated cell cytotoxicity neutralization assay for detecting Clostridioides difficile toxins in clinically relevant stools samples	5
Does over a century of aerobic phage work provide a solid framework for the study of phages in the gut?	5
Gas gangrene-associated gliding motility is regulated by the Clostridium perfringens CpAL/VirSR system	5
A Clostridioides difficile surveillance study of Canadian retail meat samples from 2016-2018	5
In vivo model of Propionibacterium (Cutibacterium) spp. biofilm in Drosophila melanogaster	5
A comparison of the antimicrobial resistance of fecal Bacteroides isolates and assessment of the composition of the intestinal microbiotas of carbapenem-treated and non-treated persons from Belgium an	5
Bulleidia extructa: An underappreciated anaerobic pathogen	5
A cost of illness comparison for toxigenic Clostridioides difficile diagnosis algorithms in developing countries	5
Detection of associated bacteria in aspiration pneumonia and lung abscesses using partial 16S rRNA gene amplicon sequencing	5
Characterization of G-type Clostridium perfringens bacteriophages and their disinfection effect on chicken meat	5
Contamination of home-grown and retail vegetables with Clostridioides difficile	5

Anti-toxin antibody is not associated with recurrent Clostridium difficile infection	5
Probiotic-related Clostridium butyricum bacteremia: a case report and literature review	5
Development of a clinical prediction model for recurrence and mortality outcomes after Clostridioides difficile infection using a machine learning approach	5
Motility and the genotype diversity of the flagellin genes fliC and fliD among Clostridioides difficile ribotypes	5
Rapid detection and surveillance of cfiA-positive Bacteroides fragilis using matrix-assisted laser desorption ionization time-of-flight mass spectrometry	5
Multi-country surveillance of Clostridioides difficile demonstrates high prevalence of spores in non-healthcare environmental settings	5
High prevalence of cfiA positive Bacteroides fragilis isolates collected at a teaching hospital in Hohhot, China	5
Inflammatory modulation and outer membrane vesicles (OMV) production associated to Bacteroides fragilis response to subinhibitory concentrations of metronidazole during experimental infection	5
Catabacter hongkongensis bacteremia identified by direct metagenomic sequencing of positive blood culture fluid, first case report in the US	5
Identification of enterotoxigenic Bacteroides fragilis in patients with diarrhea: A study targeting 16S rRNA, gyrB and nanH genes	5
Clostridioides (Clostridium) difficile in children with diarrhoea in Vietnam	5
Prevalence of cpe-positive Clostridium perfringens in surface-attached soil of commercially available potatoes and its significance as a potential source of food poisoning	5
Identification of cfxA gene variants and susceptibility patterns in β-lactamase-producing Prevotella strains	5
Characterization of medical relevant anaerobic microorganisms by isothermal microcalorimetry	5
Probiotics improve re-epithelialization of scratches infected by Porphyromonas gingivalis through up-regulating CXCL8-CXCR1/CXCR2 axis	5
A systematic review and meta-analysis of decontamination methods to prevent hospital environmental contamination and transmission of Clostridioides difficile	4
Detection of methanogens in peri-appendicular abscesses: Report of four cases	4
Butyricimonas faecihominis and Eubacterium callanderi mixed bloodstream infection after appendicular peritonitis	4
Characterization of mobile genetic elements in multidrug-resistant Bacteroides fragilis isolates from different hospitals in the Netherlands	4
In vivo pharmacodynamics of lascufloxacin and levofloxacin against Streptococcus pneumoniae and Prevotella intermedia in a pneumonia mixed-infection mouse model	4
A review of epidemiological models of Clostridioides difficile transmission and control (2009–2021)	4
Presence of Clostridioides difficile in cattle feces, carcasses, and slaughterhouses: Molecular characterization and antibacterial susceptibility of the recovered isolates	4
First large-scale study of antimicrobial susceptibility data, and genetic resistance determinants, in Fusobacterium necrophorum highlighting the importance of continuing focused susceptibility trend s	4
Intracranial abscess due to Prevotella bivia: First case report from India	4
Clostridioides difficile from intracardiac vegetation	4
Polymicrobial bacteremia due to Lactobacillus jensenii and Veillonella montpellierensis in a pregnant patient; case report and review of literature	4
Antimicrobial susceptibility patterns of anaerobic bacteria at an Irish University Hospital over a ten-year period (2010–2020)	4
Clonal diversity of Clostridium perfringens human clinical isolates with various toxin gene profiles based on multilocus sequence typing and alpha-toxin (PLC) typing	4
Bacteremia due to Prevotella oris of probable hepatic origin	4
Urinary tract infections caused by anaerobic bacteria. Utility of anaerobic urine culture	4
Linkage study of surveillance and hospital admission data to investigate Clostridium difficile infection in hospital patients in Perth, Western Australia	4
Genetic diversity and phylogenetic analysis of the surface layer protein A gene (slpA) among Clostridioides difficile clinical isolates from Tehran, Iran	4
Paraclostridium dentum, a novel species with pathogenic features isolated from human dental plaque sample	4
Preferential use of plant glycans for growth by Bacteroides ovatus	4
The role of Actinomyces spp. and related organisms in cervicofacial infections: Pathomechanism, diagnosis and therapeutic aspects	4
Lactobacillus acidophilus regulates abnormal serotonin availability in experimental ulcerative colitis	4
First reported case of Lachnoanaerobaculum gingivalis bacteremia in an acute myeloid leukemia patient with oral mucositis during high dose chemotherapy	4
Laboratory diagnosis of Clostridioides (Clostridium) difficile infection in domestic animals: A short review	4
Recognizing Cutibacterium acnes as a cause of infectious pericarditis: A case report and review of literature	3
Bifidobacterium bacteraemia is rare with routine probiotics use in preterm infants: A further case report with literature review	3
Antimicrobial susceptibility testing of Eggerthella lenta blood culture isolates at a university hospital in Belgium from 2004 to 2018	3
First case of abdominal infection caused by bacteroides fluxus	3
Isoeugenol-functionalized nanogels inhibit peri-implantitis associated bacteria in vitro	3
Bacteroides fragilis vertebral osteomyelitis: A rare clinical entity	3
Molecular study on metronidazole resistance in Bacteroides fragilis group isolates from a South Indian tertiary care center	3
Colitis caused by Clostridioides difficile infection in a domestic dog: A case report	3
In vitro sensitivity of 30 anaerobic bacterial strains of the human intestinal core microbiota to antibiotics: Culture and LC-MS/MS approaches	3
Changes in treatment of community-onset Clostridioides difficile infection after release of updated guidelines, Atlanta, Georgia, 2018	3
Clinical and microbiological characteristics of Ruminococcus gnavus bacteremia and intra-abdominal infection	3
Rapid release of sepsis markers heparin-binding protein and calprotectin triggered by anaerobic cocci poses an underestimated threat	3
Low prevalence of Cutibacterium acnes in prostatic tissue biopsies in a French hospital	3
Development of multiplex PCR panel for detection of anaerobic bacteria in clinical samples	3
Clostridioides difficile: New global perspectives	3
The first case of septic arthritis of the knee caused by Eggerthia catenaformis	3
Molecular characterization of pathogenicity locus (PaLoc) and tcdC genetic diversity among tcdAB Clostridioides difficile clinical isolates in Tehran, Iran	3
Prosthetic joint infection caused by an atypical gram-negative bacilli: Odoribacter splanchnicus	3
Antimicrobial susceptibility testing of anaerobic bacteria causing bacteremia: A 13-year (2010–2022) retrospective study in a tertiary hospital	3
Peritoneal dialysis catheter-associated polymicrobial infection including Actinomyces neuii: Case report and brief literature review	3
Clostridioides difficile PCR Tcdb Cycle Threshold predicts toxin EIA positivity but not severity of infection	3
Unusual case of necrotizing pneumonia caused by Fusobacterium nucleatum complicating influenza a virus infection	3
Enhancing biogas generation from lignocellulosic biomass through biological pretreatment: Exploring the role of ruminant microbes and anaerobic fungi	3
An uncommon case of native joint septic arthritis by Parvimonas micra	3
Association between antiulcer agents and Clostridioides difficile infection in patients receiving antibiotics: A retrospective cohort study using the diagnosis procedure combination database in Japan	3
False amoxicillin/clavulanic acid susceptibility in Bacteroides fragilis using gradient strip tests	3
Detection of Clostridioides difficile in hospital environment by using C diff Banana Broth™	3
Polymicrobial anaerobic sepsis due to Bacteroides fragilis, Eggerthella lenta, Ruminoccocus gnavus, and Bilophila wadsworthia in a patient with myeloproliferative neoplasm	3
Prevotella oris: A lesser known etiological agent of pleural effusion	3
An inexpensive anaerobic chamber for the genetic manipulation of strictly anaerobic bacteria	3
Short blood culture time-to-positivity in Fusobacterium necrophorum bacteremia is associated with Lemierre's syndrome	3
Prevalence, genetic characteristics, and antimicrobial resistance of Clostridioides difficile isolates from horses in Korea	3
A tale of two unusual anaerobic bacterial infections in an immunocompetent man: A case report and literature review	3
Anaerobes in specific infectious and noninfectious diseases: new developments	3
Septic shock caused by Slackia exigua in a patient with diabetes	3
Membrane vesicles of Lactobacillus gasseri ATCC 19992 disrupt biofilms of vaginal pathogens	3
Pacemaker infection and endocarditis due to Parvimonas micra: A case report and systematic review	3
Generating a fucose permease deletion mutant in Bifidobacterium longum subspecies infantis ATCC 15697	3
Theophylline-based control of repA on a Clostridioides difficile plasmid for use in allelic exchange	3
Brain abscess caused by Parvimonas micra: A rare case report and literature review	3
Emerging alternatives against Clostridioides difficile infection	3
Different breakpoints interpretation yielded distinct resistance rates to moxifloxacin of clinically significant anaerobic bacteria	3
A rare case of necrotizing fasciitis of the abdominal wall due to Hungatella effluvii and Streptococcus constellatus	3
A case of Slackia exigua bacteremia associated with pyometra in a patient with poor dentition	3
Description and comparative genome analysis of Hallella absiana sp. nov., isolated from pig feces	3
Characterization of the components of the thioredoxin system in Bacteroides fragilis and evaluation of its activity during oxidative stress	3