| energetics and kinetics of lactate fermentation to acetate and propionate via methylmalonyl-coa or acrylyl-coa. | fermentation balances and growth yields were determined with various bacteria fermenting lactate to acetate plus propionate either via methylmalonyl-coa or via acrylyl-coa. all strains fermented lactate to acetate plus propionate at approximately a 1:2 ratio. growth yields of propionibacterium freudenreichii were more than twice as high as those of clostridium homopropionicum or veillonella parvula. hydrogen was formed as a side product to a significant extent only by v. parvula and pelobacter p ... | 2002 | 12052552 |
| invasion of dentinal tubules by oral bacteria. | bacterial invasion of dentinal tubules commonly occurs when dentin is exposed following a breach in the integrity of the overlying enamel or cementum. bacterial products diffuse through the dentinal tubule toward the pulp and evoke inflammatory changes in the pulpo-dentin complex. these may eliminate the bacterial insult and block the route of infection. unchecked, invasion results in pulpitis and pulp necrosis, infection of the root canal system, and periapical disease. while several hundred ba ... | 2002 | 12097359 |
| changes in the intestinal flora after the administration of prophylactic antibiotics to patients undergoing a gastrectomy. | changes in the intestinal flora were investigated in patients administered antibiotics for 4 days after a gastrectomy. | 2002 | 12111513 |
| selection of dairy bacterial strains as probiotics for oral health. | the aim of the present study was to select bacterial strains with potential properties as oral probiotics, namely for the prevention of dental caries. we examined 23 dairy microorganisms, out of which we identified two streptococcus thermophilus and two lactcoccus lactis strains that were able to adhere to saliva-coated hydroxyapatite beads to the same extent as streptococcus sobrinus omz176. two of them, strep. thermophilus ncc1561 and lactoc. lactis ssp. lactis ncc2211, were further successful ... | 2002 | 12120707 |
| orbital cellulitis and abscess secondary to dacryocystitis. | | 2002 | 12149070 |
| combinations of bacterial species in endodontic infections. | this study was undertaken to investigate combinations of bacteria found in root-canal infections of teeth with periapical bone destruction without clinical signs and symptoms. | 2002 | 12196223 |
| comparative in vitro activity of faropenem and 11 other antimicrobial agents against 405 aerobic and anaerobic pathogens isolated from skin and soft tissue infections from animal and human bites. | faropenem, a new oral beta-lactam agent with a penem structure, was very active against 405 aerobic and anaerobic bite isolates. it inhibited 232 of 236 (98%) aerobic isolates, including all pasteurella spp. and eikenella corrodens at < or = 0.25 mg/l, and 164/169 (97%) anaerobic isolates, at < or = 1 mg/l. the 10 isolates that required > or = 2 mg/l for inhibition were one strain each of acinetobacter lwoffi, corynebacterium minutissimum, bacteroides ovatus, lactobacillus delbrueckii and peptos ... | 2002 | 12205068 |
| [a comparative study of the various organisms causing salpingitis and their potential presence in iud wearers]. | a prospective study was undertaken to compare the enbdometrial and vaginal bacteria of a continuous series of 283 patients who had iuds removed between june 1, 1979 and june 1, 1983, by the same clinician. measures were taken to avoid contamination of the iud upon removal by the vaginal bacteria, but as a practical matter it was impossible to avoid all contact. the iuds involved were multiload copper 250 or 375, gyne t and t 200, nova t, and dimelys. the number of positive cultures from the ... | 1985 | 12339972 |
| stress and the periodontal diseases: effects of catecholamines on the growth of periodontal bacteria in vitro. | microorganisms possess the ability to recognize hormones within the host and utilize them to adapt to their surroundings. noradrenaline and adrenaline, which are released during human stress responses, may act as environmental cues to alter the growth of individual organisms within subgingival biofilms. the aims of this study were to modify, for anaerobic culture, existing methodology used in determining microorganism catecholamine responses and to investigate the growth responses to noradrenali ... | 2002 | 12354211 |
| megaesophagus microbiota: a qualitative and quantitative analysis. | bacterial overgrowth in the esophageal lumen in patients with megaesophagus can be the cause of recurring pulmonary infections, infectious complications due to surgical or endoscopic procedures, and the development of dysplasia of the esophageal mucosa and cancer. despite this, esophageal microbiota in the megaesophagus have never been studied. the aim of this study was to analyze qualitatively and quantitatively the microbiota in chagasic megaesophagus in comparison to the normal esophagus. twe ... | 2002 | 12399062 |
| innate immune responses of human neonatal cells to bacteria from the normal gastrointestinal flora. | the hygiene hypothesis postulates that the prevalence of allergy has increased due to decreased microbial stimulation early in life, leading to delayed maturation of the immune system. the aim of this study was to examine the cytokine pattern produced from cord blood mononuclear cells relative to adult cells after stimulation with bacterial strains from the normal flora. mononuclear cells from cord and adult blood samples were stimulated with the following bacteria: bifidobacterium adolescentis, ... | 2002 | 12438343 |
| correlations between bacterial levels in autologous subgingival plaque and saliva of adult sudanese. | the aim of this study was to assess levels of oral bacteria and their correlations in paired samples of saliva and subgingival plaque in a population of adult sudanese. whole saliva and pooled subgingival plaque samples from six probing sites of one tooth in each jaw were obtained from 56 sudanese adults (mean age 35.2+/-8.9 years). levels of 24 oral bacteria in the autologous saliva and pooled plaque sample of each subject were assessed by dna probes and checkerboard dna-dna hybridization. ther ... | 2002 | 12483235 |
| activity and properties of fumarate reductase in ruminal bacteria. | fumarate-reducing bacteria were sought from the main ruminal bacteria. fibrobacter succinogenes, selenomonas ruminantium subsp. ruminantium, selenomonas ruminantium subsp. lactilytica, and veillonella parvula reduced fumarate by using h(2) as an electron donor. ruminococcus albus, prevotella ruminicola, and anaerovibrio lipolytica consumed fumarate, although they did not oxidize h(2). of these bacteria, v. parvula, two strains of selenomonas, and f. succinogenes had a high capacity to reduce fum ... | 2000 | 12483585 |
| effect of subtherapeutic concentrations of tylosin on the inhibitory stringency of a mixed anaerobe continuous-flow culture of chicken microflora against escherichia coli o157:h7. | the aim of this study was twofold: first to determine the effect of subtherapeutic concentrations of tylosin, a macrolide antibiotic used for growth promotion, on a mixed anaerobic continuous-flow fermentation culture of chicken gastrointestinal microorganisms (ccf) and secondly, to determine if these concentrations would allow persistence of escherichia coli o157:h7 in ccf. | 2003 | 12492926 |
| bronchopneumonia and oral health in hospitalized older patients. a pilot study. | to correlate microbial findings obtained by bronchoalveolar lavage in pneumonia patients with the clinical situation of the oral cavity. | 2002 | 12542215 |
| the microflora recovered from the outer-surfaces of the frialit-2 implanto-prosthetic connector. | the aim of the present investigation was to examine the outer-surface microbiota of the prosthetic connector of frialit-2 implants, and to compare the microbial findings with the peri-implant parameters 2 years after functional loading. in 16 implant-treated patients (55.8 +/- 9.5 years) the outer-surface micro-organisms of the prosthetic connectors were determined in 32 frialit-2 implants. the functional loading time of the prosthetic suprastructures was 24.1 +/- 13.8 months on average. after r ... | 2003 | 12562362 |
| mass transport of macromolecules within an in vitro model of supragingival plaque. | the aim of this study was to examine the diffusion of macromolecules through an in vitro biofilm model of supragingival plaque. polyspecies biofilms containing actinomyces naeslundii, fusobacterium nucleatum, streptococcus oralis, streptococcus sobrinus, veillonella dispar, and candida albicans were formed on sintered hydroxyapatite disks and then incubated at room temperature for defined periods with fluorescent markers with molecular weights ranging from 3,000 to 900,000. subsequent examinatio ... | 2003 | 12620862 |
| in vitro activities of telithromycin and 10 oral agents against aerobic and anaerobic pathogens isolated from antral puncture specimens from patients with sinusitis. | a study of the comparative in vitro activity of telithromycin, a new ketolide, against 155 aerobic and 171 anaerobic antral sinus puncture isolates showed it to be active against a broad range of sinus pathogens. all pneumococci, including erythromycin-resistant strains, were susceptible to telithromycin at < or = 0.5 microg/ml; all haemophilus influenzae and eikenella corrodens strains were inhibited by < or = 4 microg of telithromycin/ml; all moraxella spp. and beta-lactamase-producing prevote ... | 2003 | 12760875 |
| intra-chromosomal heterogeneity between the four 16s rrna gene copies in the genus veillonella: implications for phylogeny and taxonomy. | among the seven species characterized within the genus veillonella, three (veillonella dispar, veillonella parvula and veillonella atypica) have so far been isolated from human flora and during infectious processes. sequencing and analysis of 16s rdna (rrs) has been described as the best method for identification of veillonella strains at the species level since phenotypic characteristics are unable to differentiate between species. rrs sequencing for the three species isolated from humans showe ... | 2003 | 12777489 |
| the effects of a triclosan/copolymer dentifrice on oral bacteria including those producing hydrogen sulfide. | a clinical procedure was developed to examine the effects of short-term and extended use of a triclosan/copolymer dentifrice and a commercial fluoride dentifrice on oral bacteria, including those producing hydrogen sulfide. healthy adults volunteered for this double-blind, crossover design clinical study and provided saliva samples for culturing on enriched and indicator media to enumerate all salivary bacteria and those producing hydrogen sulfide (odorigenic), respectively. subjects brushed wit ... | 2003 | 12786953 |
| microbiology of mandibular third molar pericoronitis: incidence of beta-lactamase-producing bacteria. | the purpose of this study was to evaluate the predominant flora associated with pericoronitis in third molars and to investigate the presence of beta-lactamase-producing strains. | 2003 | 12789143 |
| subgingival microbiota levels and their associations with periodontal status at the sampled sites in an adult sudanese population using miswak or toothbrush regularly. | little information is available on the effect of miswak use on gingival microbiota. we assessed levels of 28 oral bacteria in subgingival plaque of adult sudanese miswak (n = 38) and toothbrush users (n = 36) age range 20-53 years (mean 34.6 years) to study associations between these bacteria, oral hygiene method, and periodontal status at the sampled sites. a pooled subgingival plaque sample from 6 probing sites of 1 selected tooth in each jaw was obtained from each subject. whole genomic dna p ... | 2003 | 12790510 |
| penicillin-binding proteins involved in high-level piperacillin resistance in veillonella spp. | to investigate high-level piperacillin resistance in veillonella spp. in the absence of beta-lactamase activity. | 2003 | 12805259 |
| in vitro activities of ramoplanin, teicoplanin, vancomycin, linezolid, bacitracin, and four other antimicrobials against intestinal anaerobic bacteria. | by using an agar dilution method, the in vitro activities of ramoplanin, teicoplanin, vancomycin, linezolid, and five other agents were determined against 300 gram-positive and 54 gram-negative strains of intestinal anaerobes. ramoplanin was active at <or=2 microg/ml against 287 of 300 (95.7%) gram-positive organisms, including 18 strains of clostridium difficile for which mics of ramoplanin were 0.25 to 0.5 microg/ml; for 3 of these, linezolid mics were 8 to 16 micro g/ml. nineteen clostridium ... | 2003 | 12821492 |
| distribution of selected bacterial species on intraoral surfaces. | to examine the proportions of 40 bacterial species in samples from 8 oral soft tissue surfaces and saliva in systemically healthy adult subjects and to compare these microbiotas with those of supra- and subgingival plaque. | 2003 | 12834503 |
| effects of a chlorhexidine gluconate-containing mouthwash on the vitality and antimicrobial susceptibility of in vitro oral bacterial ecosystems. | oral bacterial microcosms, established using saliva inocula from three individuals, were maintained under a feast-famine regime within constant-depth film fermenters. steady-state communities were exposed four times daily, postfeeding, to a chlorhexidine (chx) gluconate-containing mouthwash (chxm) diluted to 0.06% (wt/vol) antimicrobial content. the microcosms were characterized by heterotrophic plate counts and pcr-denaturing gradient gel electrophoresis (dgge). chxm caused significant decrease ... | 2003 | 12902270 |
| age-related frequency of penicillin resistance of oral veillonella. | veillonella spp. are early colonizing inhabitants in the mouth. as part of studies on penicillin resistance among oral indigenous anaerobic microbiota in childhood, the aim of the present longitudinal study was to examine the emergence of resistant strains in veillonella populations. altogether 305 veillonella isolates from saliva of 49 healthy infants followed from 2 to 24 months of age were examined for their in vitro susceptibility to penicillin g and, further, 20 penicillin-resistant isolate ... | 2003 | 12944020 |
| [veillonella parvula lacrimal canaliculitis]. | | 1953 | 13080806 |
| succinic acid decarboxylation system in propionibacterium pentosaceum and veillonella gazogenes. i. activation, decarboxylation, and related reactions. | | 1956 | 13331872 |
| succinic acid decarboxylation system in propionibacterium pentosaceum and veillonella gazogenes. ii. evidence for an active c1 complex. | | 1956 | 13331873 |
| a selective medium for the isolation and enumeration of the veillonella from the oral cavity. | | 1956 | 13366960 |
| improved medium for selective isolation of veillonella. | | 1958 | 13587489 |
| ninhydrin positive substances in cell wall hydrolyzates of some anaerobic cocci. | | 1959 | 13620662 |
| [oxidation enzymes in veillonella alcalescens]. | | 1960 | 13849020 |
| serologically specific lipopolysaccharides from oral veillonella. | | 1963 | 13934968 |
| [comparative determinations of resistance under aerobic and anaerobic conditions]. | | 1963 | 13945841 |
| [anaerobic culture method with steel wool]. | | 1962 | 13965786 |
| degradation of pyruvate by micrococcus lactilyticus. iii. properties and cofactor requirements of the carbon dioxide-exchange reaction. | whiteley, h. r. (university of washington, seattle) and n. g. mccormick. degradation of pyruvate by micrococcus lactilyticus. iii. properties and cofactor requirements of the carbon dioxide-exchange reaction. j. bacteriol. 85:382-393. 1963.-at an acid ph, extracts of micrococcus lactilyticus (veillonella alcalescens) catalyze the oxidative decarboxylation of pyruvate to carbon dioxide, hydrogen, and acetyl phosphate, and the rapid exchange of carbon dioxide into the carboxyl group of pyruvate. t ... | 1963 | 14000380 |
| reduction of inorganic compounds with molecular hydrogen by micrococcus lactilyticus. i. stoichiometry with compounds of arsenic, selenium, tellurium, transition and other elements. | woolfolk, c. a. (university of washington, seattle) and h. r. whiteley. reduction of inorganic compounds with molecular hydrogen by micrococcus lactilyticus. i. stoichiometry with compounds of arsenic, selenium, tellurium, transition and other elements. j. bacteriol. 84:647-658. 1962.-extracts of micrococcus lactilyticus (veillonella alcalescens) oxidize molecular hydrogen at the expense of certain compounds of arsenic, bismuth, selenium, tellurium, lead, thallium, vanadium, manganese, iron, cop ... | 1962 | 14001842 |
| reduction of inorganic compounds with molecular hydrogen by micrococcus lactilyticus. ii. stoichiometry with inorganic sulfur compounds. | woolfolk, c. a. (university of washington, seattle). reduction of inorganic compounds with molecular hydrogen by micrococcus lactilyticus. ii. stoichiometry with inorganic sulfur compounds. j. bacteriol. 84:659-668. 1962.-extracts of micrococcus lactilyticus (veillonella alcalescens) are capable of utilizing molecular hydrogen for the reduction of metabisulfite (pyrosulfite) to thiosulfate via dithionite as an intermediate. the first step of metabisulfite reduction (i.e., to dithionite) is rever ... | 1962 | 14001843 |
| production and fermentation of lactate by bacteria in the alimentary canal of the horse and pig. | | 1963 | 14011947 |
| role of ferredoxin in the metabolism of molecular hydrogen. | valentine, r. c. (university of illinois, urbana) and r. s. wolfe. role of ferredoxin in the metabolism of molecular hydrogen. j. bacteriol. 85:1114-1120. 1963.-the metabolism of molecular hydrogen by clostridium pasteurianum, micrococcus lactilyticus (veillonella alcalescens), and several other anaerobic bacteria was studied. oxidation of hydrogen, using several electron-accepting substrates including triphosphopyridine nucleotide, uric acid, xanthine, nitrite, and hydroxylamine, required ferre ... | 1963 | 14044002 |
| veillonella alcalescens lung abscess. report of a case with bacteriological studies. | | 1963 | 14062865 |
| observations on the alimentary tract and its bacterial flora in healthy and diseased pigs. | | 1963 | 14068948 |
| anaerobic infection of the brain. observations on eighteen consecutive cases of brain abscess. | | 1963 | 14076021 |
| the genus veillonella. i. general cultural, ecological, and biochemical considerations. | rogosa, m. (national institutes of health, bethesda, md.). the genus veillonella. i. general cultural, ecological, and biochemical considerations. j. bacteriol. 87:162-170. 1964.-arguments are presented for excluding veillonella discoides, v. reniformis, v. orbiculus, and v. vulvovaginitidis from the genus, and for restricting it to aerogenic organisms such as v. parvula and v. alcalescens. the genus veillonella thus would comprise species which are anaerobic and nonmotile; are small, spherical, ... | 1964 | 14102850 |
| [on the diagnosis of non-sporiferous anaerobes]. | | 1963 | 14114136 |
| bacteria in whipple's disease. results of cultivation from repeated jejunal biopsies prior to, during, and after effective antibiotic treatment. | | 1964 | 14123354 |
| the gingival crevice microbiota in five preschool children. | | 1964 | 14126698 |
| the genus veillonella . ii. nutritional studies. | rogosa, m. (national institute of dental research, u.s. public health service, bethesda, md.), and ferial s. bishop. the genus veillonella. ii. nutritional studies. j. bacteriol. 87:574-580. 1964.-a medium is described for the study of the vitamin, hypoxanthine, putrescine, or cadaverine requirements of 86 veillonella isolates from man, rabbit, rat, and hamster. no organism required riboflavine or folic acid for growth. niacin and calcium pantothenate were often stimulatory, but in nearly all ca ... | 1964 | 14127572 |
| a study of the effects of orthodontic appliances on the oral microbial flora. | | 1964 | 14131587 |
| experiences of bacteriological root canal control. | | 1964 | 14158470 |
| influence of endotoxin on resistance of mice to intraperitoneal infection with human oral bacteria. | | 1964 | 14170640 |
| studies of the predominant cultivable microbiota of dental plaque. | | 1964 | 14170653 |
| succinic acid degradation by veillonella alcalescens. | | 1964 | 14188738 |
| the genus veillonella. 3. hydrogen sulfide production by growing cultures. | rogosa, morrison (national institute of dental research, bethesda, md.), and ferial s. bishop. the genus veillonella. iii. hydrogen sulfide production by growing cultures. j. bacteriol. 88:37-41. 1964.-the conditions necessary for h(2)s production by 105 strains of veillonella, from a variety of sources and comprising seven anti-genic groups, are presented and discussed. all strains, during 1 to 2 days of growth, produced h(2)s in a defined medium supplemented with proper amounts of l-cysteine, ... | 1964 | 14198791 |
| vitamin k compounds in bacteria that are obligate anaerobes. | a naphthoquinone-dependent strain of bacteroides melaninogenicus has been used in a microbiological assay to survey bacteria for compounds of the vitamin k group. organisms known to contain vitamin k, as well as several bacteria that are obligate anaerobes, produced substances which satisfied the naphthoquinone requirement of the assay organism. vitamin k was chemically isolated from strains of bacteroides melaninogenicus, bacteroides fragilis, and veillonella alcalescens. | 1964 | 14207457 |
| the enzymatic synthesis of folate-like compounds from hydroxymethyldihydropteridine pyrophosphate. | | 1964 | 14209957 |
| histopathologic effects of endotoxin injected into rabbit oral mucosa. | | 1964 | 14219517 |
| establishment of human indigenous bacteria in germ-free mice. | gibbons, r. j. (forsyth dental center and harvard school of dental medicine, boston, mass.), s. s. socransky, and b. kapsimalis. establishment of human indigenous bacteria in germ-free mice. j. bacteriol. 88:1316-1323. 1964.-thirteen strains of bacteria indigenous to the gingival crevice area of man were tested for their ability to establish as monocontaminants in germ-free mice. three facultative organisms, streptococcus mitis, staphylococcus albus, and a "diphtheroid," established, as well as ... | 1964 | 14234787 |
| ultrastructure of veillonella and morphological correlation of an outer membrane with particles associated with endotoxic activity. | bladen, howard a. (national institute of dental research, bethesda, md.), and stephan e. mergenhagen. ultrastructure of veillonella and morphological correlation of an outer membrane with particles associated with endotoxic activity. j. bacteriol. 88:1482-1492. 1964.-normal, phenol-water extracted, and lysozyme-treated veillonella cells were embedded in vestopal w, sectioned, and examined by electron microscopy. normal cells as well as the phenol-water extract (endotoxin) were examined by negati ... | 1964 | 14234809 |
| fatty acid composition of lipids extracted from three spherical bacteria. | | 1964 | 14235693 |
| the indigenous oral flora of man. i. the newborn to the 1-year-old infant. | | 1965 | 14262161 |
| antibody to leptotrichia buccalis in human sera. | | 1965 | 14270476 |
| immunological and chemical studies on an oral veillonella endotoxin. | | 1962 | 14472787 |
| [megaesophagus microbiota and carcinogenesis]. | the risk of development of spin cell carcinoma of the esophagus is 33 times higher in patients with chagasic achalasia. it is possible that the production of n-nitroso compounds in the esophageal lumen by of bacterial action in the stasis liquid that reduce nitrates from diet into nitrites may play a role in this process. | 2003 | 14534659 |
| in vitro activities of a new des-fluoro(6) quinolone, garenoxacin, against clinical anaerobic bacteria. | the antimicrobial activities of garenoxacin and eight other antibiotics against 641 anaerobic isolates were evaluated with the nccls agar dilution method. overall, the mics of garenoxacin for 50 and 90% of the strains tested (in micrograms per milliliter) were as follows: bacteroides fragilis group, 0.5 and 2; prevotella spp., 0.25 and 2; fusobacterium spp., 0.25 and 0.5; porphyromonas spp., 0.125 and 0.25; bilophila wadsworthia, 0.5 and 1; veillonella spp., 0.25 and 0.5; clostridium spp., 0.25 ... | 2003 | 14576144 |
| bacteriologic findings in patients with chronic sinusitis. | we studied the bacteriology of maxillary sinus aspirates obtained from patients diagnosed with chronic sinusitis. we recovered 659 strains from 510 aspirates; of these, 572 (86.8%) were aerobes and 87 (13.2%) were anaerobes. aerobes only were recovered from 310 of the 510 specimens (60.8%) and anaerobes only from 31 (6.1%). among the 572 aerobic bacteria, the most prevalent organisms were streptococcus viridans (158 strains [27.6%]), streptococcus pneumoniae (67 [11.7%]), corynebacterium species ... | 2003 | 14606178 |
| prevalence and identification of tetracycline-resistant oral bacteria in children not receiving antibiotic therapy. | the prevalence of tetracycline-resistant oral bacteria in healthy 4- and 6-year-old children who had not received antibiotics during the 3 months prior to sampling was investigated. of the 47 children sampled, 46 harboured tetracycline-resistant bacteria. the median proportion of cultivable anaerobic and aerobic oral bacteria resistant to tetracycline was 1.1% and the mic50 of these was 64 microg ml(-1). the majority (56%) of tetracycline-resistant bacteria were resistant to at least one other a ... | 2003 | 14612243 |
| susceptibility of oral bacteria to melaleuca alternifolia (tea tree) oil in vitro. | the in vitro activity of melaleuca alternifolia (tea tree) oil against 161 isolates of oral bacteria from 15 genera was determined. minimum inhibitory concentrations (mic) and minimum bactericidal concentrations (mbc) ranged from 0.003 to 2.0% (v/v). mic90 values were 1.0% (v/v) for actinomyces spp., lactobacillus spp., streptococcus mitis and streptococcus sanguis, and 0.1% (v/v) for prevotella spp. isolates of porphyromonas, prevotella and veillonella had the lowest mics and mbcs, and isolates ... | 2003 | 14622345 |
| an in vitro study into the corrosion of intra-oral magnets in the presence of dental amalgam. | the aim of this investigation was to study the corrosion behaviour and products of uncoated neodymium-iron-boron magnets in the presence of dental amalgam. microcosm plaques were grown on discs of neodymium-iron-boron magnets or amalgam in a constant depth film fermentor. the biofilms were supplied with artificial saliva and growth was determined by viable counting. the results showed that the neodymium-iron-boron magnets corroded with an average daily weight loss of 0.115 +/- 0.032 per cent. ho ... | 2003 | 14700268 |
| antibiotic susceptibility of bacterial isolates in gingivitis and periodontitis. | the present study was conducted to isolate aerobic as well as anaerobic microbes from patients of gingivitis and adult periodontitis and to study the susceptibility patterns of these isolates to different antibiotics. in our study all the samples belonging to the control as well as the study groups yielded microbes. aerobes and facultative anaerobes were isolated from 100 percent and 96 percent cases of normal gingiva and orodental infections respectively. anaerobes were isolated from 80 percent ... | 2003 | 14705453 |
| multiplex fish analysis of a six-species bacterial biofilm. | established procedures use different and seemingly incompatible experimental protocols for fluorescent in situ hybridization (fish) with gram-negative and gram-positive bacteria. the aim of this study was to develop a procedure, based on fish and confocal laser scanning microscopy (clsm), for the analysis of the spatial organization of in vitro biofilms containing both gram-negative and gram-positive oral bacteria. biofilms composed of the six oral species actinomyces naeslundii, candida albican ... | 2004 | 14706749 |
| molecular dissection of the selenomonas ruminantium cell envelope and lysine decarboxylase involved in the biosynthesis of a polyamine covalently linked to the cell wall peptidoglycan layer. | the wild type of selenomonas ruminantium subsp. lactilytica, which is a strictly anaerobic, gram-negative bacterium isolated from sheep rumen, requires one of the normal saturated volatile fatty acids with 3 to 10 carbon atoms for its growth in a glucose medium; however, no such obligate requirement of fatty acid is observed when the cells are grown in a lactate medium. this bacterium is characterized by a unique structure of the cell envelope and a novel lysine decarboxylase and its regulatory ... | 2004 | 14745158 |
| the mechanism of propionic acid formation by veillonella gazogenes. | | 1951 | 14832421 |
| prevalence, proportions, and identities of antibiotic-resistant bacteria in the oral microflora of healthy children. | the aims of this study were to determine the prevalence, proportions and identities of oral bacteria resistant to six antibiotics in 35 children (4-5 years old) who had not received antibiotics during the previous 3 months. ampicillin-, penicillin-, erythromycin-, and tetracycline-resistant bacteria were harbored by 35 (100%), 34 (97%), 35 (100%), and 34 (97%) children, respectively. none of the children harbored metronidazole-resistant anaerobic bacteria or gram-positive vancomycin-resistant ba ... | 2003 | 15000743 |
| total hip prosthetic joint infection due to veillonella species. | | 2004 | 15050206 |
| [a bacteriology analysis from infected root canals of human deciduous teeth] | objective: to provide a basis for therapy and prevention, the flora of infected root canals of human deciduous teeth was analyzed.methods: by immediate-enzyme method, the bacteria compositions of 22 cases with infected root canals of deciduous teeth, including 8 cases with acute periapical inflammation and 14 with chronic ones, were examined. results: among 240 strains bactera, 200 strains were obligate anaerobes, belonging to the genera peptostreptococcus, bacteriodes, veillonella, eubacterrum, ... | 1998 | 15071650 |
| pattern of cytokine responses to gram-positive and gram-negative commensal bacteria is profoundly changed when monocytes differentiate into dendritic cells. | the normal gastrointestinal bacterial flora is crucial for the maturation of acquired immunity via effects on antigen-presenting cells (apcs). here we investigated how two types of apcs, monocytes and dendritic cells (dcs), react to different bacterial strains typical of the commensal intestinal microflora. purified human monocytes and monocyte-derived dcs were stimulated with uv-inactivated gram-positive (lactobacillus plantarum and bifidobacterium adolescentis) and gram-negative (escherichia c ... | 2004 | 15102775 |
| commensal gram-negative bacteria prime human dendritic cells for enhanced il-23 and il-27 expression and enhanced th1 development. | dendritic cells (dc) are the main orchestrators of specific immune responses. depending on microbial information they encounter in peripheral tissues, they promote the development of th1, th2 or unpolarized th cell responses. in this study we have investigated the immunomodulatory effect of non-pathogenic intestinal gram-negative (escherichia coli, bacteroides vulgatus,veillonella parvula, pseudomonas aeruginosa) and gram-positive (bifidobacterium adolescentis, enterococcus faecalis, lactobacill ... | 2004 | 15114670 |
| selection for high-level resistance by chronic triclosan exposure is not universal. | to investigate the effect of triclosan exposure on the antimicrobial susceptibilities of numerically important dental bacteria. | 2004 | 15117935 |
| acute disseminated encephalomyelitis following pleural empyema owing to boerhaave's syndrome. | acute disseminated encephalomyelitis is reported in a 14-year-old male patient associated with a pleural empyema caused by an esophageal perforation. during the hospital course, the patient experienced an episode of cardiac arrest, raising the question of hypoxic-ischemic cerebral injury, but the magnetic resonance imaging (mri) findings and clinical course were most consistent with acute disseminated encephalomyelitis. after a course of methylprednisolone, broad-spectrum antibiotics, and bilate ... | 2004 | 15119485 |
| systematic 16s rrna gene sequencing of atypical clinical isolates identified 27 new bacterial species associated with humans. | clinical microorganisms isolated during a 5-year study in our hospital that could not be identified by conventional criteria were studied by 16s rrna gene sequence analysis. each isolate yielded a > or =1,400-bp sequence containing <5 ambiguities which was compared with the genbank 16s rrna gene library; 1,404 such isolates were tested, and 120 were considered unique (27 isolates) or rare (< or =10 cases reported in the literature) human pathogens. eleven new species, "actinobaculum massiliae," ... | 2004 | 15131188 |
| antibiotic resistance profile of the subgingival microbiota following systemic or local tetracycline therapy. | tetracyclines have been extensively used as adjunctives to conventional periodontal therapy. emergence of resistant strains, however, has been reported. this study evaluated longitudinally the tetracycline resistance patterns of the subgingival microbiota of periodontitis subjects treated with systemic or local tetracycline therapy+scaling and root planing (srp). | 2004 | 15142209 |
| [a preliminary study on the relationship between streptococcus and neisseria,veillonella in an artificial mouth model] | the viable cell count of monobacterial plaque of streptococcus and mixed bacterial plaque of streptococcus and neisseria veillonella,also the demineralization caused by the plaques were observed.the assumption that neisseria and veillonella might reduce demineralization of enamel caused by streptococcus was confirmed.the relationship between streptococcus and neisseria,veillonella were preliminarily found out. | 1996 | 15160005 |
| [bacterial contamination of bony particles from the bone collection trap]. | intraoral bony defects can be filled with bony particles that are collected in a titanium filter while drilling. the rinsing liquid is contaminated with blood and saliva which implies that the bony particles are also contaminated with bacteria. the aim of this study was to determine quantitatively and qualitatively the degree of this contamination. over a period of three months bony particles were collected from 50 patients undergoing surgery. the bony particles were scraped off the filter, resu ... | 2004 | 15185482 |
| [analysis of oral microflora early colonized in infants]. | to observe the dynamic changes of oral microflora early colonized in infants. | 2004 | 15190795 |
| use of a continuous-flow anaerobic culture to characterize enteric virulence gene expression. | we developed an in vitro culture method to characterize the expression of bacterial genes under conditions mimicking the colonic environment. our culture system (the intestinal simulator) comprised a continuous-flow anaerobic culture which was inoculated with fecal samples from healthy volunteers. as a test organism, we employed enteroaggregative escherichia coli (eaec), an emerging diarrheal pathogen that is thought to cause infection in both the small and large intestines. after the simulator ... | 2004 | 15213120 |
| development of a multispecies oral bacterial community in a saliva-conditioned flow cell. | microbial communities within the human oral cavity are dynamic associations of more than 500 bacterial species that form biofilms on the soft and hard tissues of the mouth. understanding the development and spatial organization of oral biofilms has been facilitated by the use of in vitro models. we used a saliva-conditioned flow cell, with saliva as the sole nutritional source, as a model to examine the development of multispecies biofilm communities from an inoculum containing the coaggregation ... | 2004 | 15240317 |
| isolation of bacteriophages from the oral cavity. | to isolate bacteriophages lytic for oral pathogens from human saliva, dental plaque and mature biofilms constituted from saliva-derived bacteria. | 2004 | 15242464 |
| effect of amoxicillin use on oral microbiota in young children. | dental plaque samples from 40 children were screened for the presence of bacteria resistant to amoxicillin. fifteen children had used amoxicillin and 25 had not used any antibiotic in the 3 months prior to sample collection. all (100%) of the children harbored amoxicillin-resistant oral bacteria. the median percentage of the total cultivable oral microbiota resistant to amoxicillin was 2.4% (range, 0.1 to 14.3%) in children without amoxicillin use and 10.9% (range, 0.8 to 97.3%) in children with ... | 2004 | 15273096 |
| nime gene in a metronidazole-susceptible veillonella sp. strain. | | 2004 | 15273153 |
| veillonella montpellierensis sp. nov., a novel, anaerobic, gram-negative coccus isolated from human clinical samples. | three strains of a hitherto unknown, gram-negative, anaerobic coccus were isolated from human samples. at the phenotypic level, the isolates displayed all the characteristics of bacteria belonging to the genus veillonella. sequence analysis revealed that the three strains shared >99.5% similarity in 16s rdna sequence and >98.4% similarity in dnak sequence. the three unknown strains formed a separate subclade that was clearly remote from veillonella species of human and animal origin. based on th ... | 2004 | 15280307 |
| was isolation of veillonella from spinal osteomyelitis possible due to poor tissue perfusion? | from a needle biopsy of the body of the 12th thoracic vertebra in a 74-year-old man with spinal osteomyelitis a veillonella parvula was isolated. the significance of this bacterium as lactic acid indicator has been considered and discussed. since this strictly anaerobic bacterium mainly uses lactic acid for energy generation, lactic acid must continuously and sufficiently have been produced in or near to the vertebrate body to permit outgrowth of this bacterium. since neither microbial infection ... | 2004 | 15325011 |
| t-rflp combined with principal component analysis and 16s rrna gene sequencing: an effective strategy for comparison of fecal microbiota in infants of different ages. | the fecal microbiota of two healthy swedish infants was monitored over time by terminal restriction fragment length polymorphism (t-rflp) analysis of amplified 16s rrna genes. principal component analysis (pca) of the t-rflp profiles revealed that the fecal flora in both infants was quite stable during breast-feeding and a major change occurred after weaning. the two infants had different sets of microbiota at all sampling time points. 16s rdna clone libraries were constructed and the predominan ... | 2004 | 15325753 |
| biofilm growth of lactobacillus species is promoted by actinomyces species and streptococcus mutans. | the ability of oral bacteria to integrate within a biofilm is pivotal to their survival. a dependence on the amount of biofilm growth by noncoaggregating lactobacillus rhamnosus and lactobacillus plantarum on coculture with actinomyces naeslundii, actinomyces gerencseriae, streptococcus mutans and veillonella parvula was investigated using an artificial-mouth culture system. biofilm formation by the lactobacilli in mono-culture was poor. in coculture with actinomyces species the amount of l. rha ... | 2004 | 15327645 |
| the prevalence of bacteraemia on removal of fixed orthodontic appliances. | this study investigated the prevalence of bacteraemia on removal of fixed appliances. venous blood samples were taken before and after debonding and debanding for 30 patients (mean age 17 years 8 months) who had worn fixed appliances for an average of 19 months. before removal of the fixed appliances, bacteraemia was detected in one of the 30 subjects (3%) and in four subjects (13%) following removal of their fixed appliances. the 95 per cent confidence intervals for the prevalence of post-deban ... | 2004 | 15366390 |
| interspecies communication in streptococcus gordonii-veillonella atypica biofilms: signaling in flow conditions requires juxtaposition. | during the development of human oral biofilm communities, the spatial arrangement of the bacteria is thought to be driven by metabolic interactions between them. streptococcus gordonii and veillonella atypica, two early colonizing members of the dental plaque biofilm, have been postulated to participate in metabolic communication; s. gordonii ferments carbohydrates to form lactic acid, which is a preferred fermentation substrate for v. atypica. we found that, during agar-plate coculture of these ... | 2004 | 15546975 |
| investigation of the effect of the coronal restoration quality on the composition of the root canal microflora in teeth with apical periodontitis by means of t-rflp analysis. | to investigate the effect of the radiographic and clinical quality of coronal restorations on the composition of the root canal flora of teeth with necrotic pulps and teeth with root fillings associated with apical periodontitis. | 2004 | 15548272 |
| do different implant surfaces exposed in the oral cavity of humans show different biofilm compositions and activities? | osseointegrated dental implants play an important role in restorative dentistry. however, plaque accumulation may cause inflammatory reactions around the implants, sometimes leading to implant failure. in this in vivo study the influence of two physical hard coatings on bacterial adhesion was examined in comparison with a pure titanium surface. thin glass sheets coated with titanium nitride (tin), zirconium nitride (zrn) or pure titanium were mounted on removable intraoral splints in two adults. ... | 2004 | 15560835 |