Publications
| Title | Abstract | Year(sorted ascending) Filter | PMID Filter |
|---|
| streptococcus cristatus attenuates fusobacterium nucleatum-induced interleukin-8 expression in oral epithelial cells. | oral epithelial cells may be invaded by a polymicrobial intracellular flora, including pathogens together with commensals. various oral pathogens can induce the production of interleukin-8, a potent neutrophil chemotractant, in oral epithelial cells. evidence from the gut suggests that commensal species may modulate inflammatory responses to pathogens. the aim of this study was to examine the interleukin-8 responses of oral epithelial cells to an oral pro-inflammatory species, fusobacterium nucl ... | 2008 | 18942189 |
| anticaries effect of compounds extracted from galla chinensis in a multispecies biofilm model. | galla chinensis is a leaf gall known to have some antibacterial effects. using an in vitro biofilm model of dental plaque, the present study aimed to evaluate the anticaries effects of galla chinensis and its chemical fractions. | 2008 | 18954351 |
| aggregatibacter actinomycetemcomitans adhesion inhibited in a flow cell. | microbial interactions are considered important in the adhesion process of pathogenic bacteria in the oral cavity. this study addressed the hypothesis that a streptococcal biofilm influences the hard tissue colonization by the periodontopathogen aggregatibacter actinomycetemcomitans under hydrodynamic conditions. | 2008 | 18954361 |
| [preparation and antibacterial activity of quaternary ammonium salt monomers]. | to prepare three quaternary ammonium salt (qas) monomers, and to compare their antibacterial activities against four oral bacterial strains. | 2008 | 19031791 |
| antibacterial activity of two mineral trioxide aggregate materials in vitro evaluation. | it has been documented that total removal of carious dentin, assessed according to clinical criteria, does not mean complete eradication of bacteria. for that reason in prevention of caries and pulp inflammations, application of the materials having high antibacterial properties seems to be indispensable. | 2008 | 19127822 |
| bacterial and candida albicans adhesion on rapid prototyping-produced 3d-scaffolds manufactured as bone replacement materials. | rapid prototyping (rp)-produced scaffolds are gaining increasing importance in scaffold-guided tissue engineering. microbial adhesion on the surface of replacement materials has a strong influence on healing and long-term outcome. consequently, it is important to examine the adherence of microorganisms on rp-produced scaffolds. this research focussed on manufacturing of scaffolds by 3d-bioplotting and examination of their microbial adhesion characteristics. tricalciumphosphate (tcp), calcium/sod ... | 2008 | 18228269 |
| identification of species of viridans group streptococci in clinical blood culture isolates by sequence analysis of the rnase p rna gene, rnpb. | viridans group streptococci (vgs) cause severe diseases such as infective endocarditis and septicaemia. genetically, vgs species are very close to each other and it is difficult to identify them to species level with conventional methods. the aims of the present study were to use sequence analysis of the rnase p rna gene (rnpb) to identify vgs species in clinical blood culture isolates, and to compare the results with the api 20 strep system that is based on phenotypical characteristics. | 2008 | 18255158 |
| an agar diffusion comparison of the antimicrobial effect of calcium hydroxide at five different concentrations with three different vehicles. | the purpose of this study was to determine if varying the percent (by weight) of aqueous calcium hydroxide or using different vehicles had an effect on its antibacterial efficacy against common endodontic pathogens in a pour plate/traditional streak agar diffusion model. mixtures of calcium hydroxide powder and sterile saline in 40, 50 and 60 percent concentrations and the commercial preparations ultracal xs and vitapex were tested against six known endodontic pathogens with an agar diffusion me ... | 2008 | 18793931 |
| in vitro evaluation of the antimicrobial activity of a new resin-based endodontic sealer against endodontic pathogens. | the purpose of this study was to compare the antimicrobial activities of a new resin-based superbond (sb) sealer and five other sealers/cements against endodontic pathogens. the antimicrobial activities of sb sealer, sealapex, ah plus, roeko seal automix, canals n, and proroot mineral trioxide aggregate (mta) were examined using a double-layered method. the microorganisms staphylococcus aureus, enterococcus faecalis, candida albicans, streptococcus mutans, and streptococcus sanguinis were used. ... | 2008 | 18818467 |
| mlpa diagnostics of complex microbial communities: relative quantification of bacterial species in oral biofilms. | a multitude of molecular methods are currently used for identification and characterization of oral biofilms or for community profiling. however, multiplex pcr techniques that are able to routinely identify several species in a single assay are not available. multiplex ligation-dependent probe amplification (mlpa) identifies up to 45 unique fragments in a single tube pcr. here we report a novel use of mlpa in the relative quantification of targeted microorganisms in a community of oral microbiot ... | 2008 | 18824042 |
| streptococcus mutans and streptococcus sanguinis colonization correlated with caries experience in children. | the aim of this study was to examine the colonization of streptococcus mutans and streptococcus sanguinis in the oral cavity and the association with severe early childhood caries (s-ecc). saliva and plaque samples were collected from 14 s-ecc children and 8 caries-free (cf) children. all s-ecc children were s. mutans positive; 100% of cf children and 93% of s-ecc children were s. sanguinis positive. the children's caries severity was positively correlated with levels of s. mutans (p < 0.001), t ... | 2008 | 18832831 |
| a quantitative approach to the effectiveness of ozone against microbiota organisms colonizing toothbrushes. | toothbrushes are rapidly contaminated with different microorganisms, which colonize the oral cavity and interdental spaces. this can represent a possible cause of infection or reinfection. in this study, the ozone experimental effect upon toothbrushes microflora was estimated microbiologically before and after saturation with ozone gas. | 2008 | 18502558 |
| effect of xylitol/chlorhexidine versus xylitol or chlorhexidine as single rinses on initial biofilm formation of cariogenic streptococci. | oral bacteria implying a natural resistance may deteriorate the antibacterial efficacy of chlorhexidine on cariogenic microorganisms. xylitol, mostly applied via chewing gum, is known to possess favorable plaque-reducing properties. the aim of this study was to investigate the effect of a xylitol rinse formulated as pure solution or combined with chlorhexidine on the viability of streptococcus sanguis (early colonizer of human teeth) and streptococcus mutans (the most causal strain for caries) d ... | 2008 | 18551212 |
| structural basis of the zinc- and terbium-mediated inhibition of ferroxidase activity in dps ferritin-like proteins. | streptococcus suis dpr is an iron-binding protein involved in oxidative stress resistance. it belongs to the bacterial dps protein family whose members form dodecameric assemblies. previous studies have shown that zinc and terbium inhibit iron incorporation in listeria innocua dps protein. in order to gain structural insights into the inhibitory effect of zinc and terbium, the crystal structures of streptococcus suis dpr complexes with these ions were determined at 1.8 a and 2.1 a, respectively. ... | 2008 | 18552126 |
| acute coronary syndrome in aortic infective endocarditis. | a 34-year-old man was presented with aortic infective endocarditis and acute coronary syndrome due to an extrinsic coronary compression due to periannular complications. | 2008 | 18579492 |
| antimicrobial activity of kaurane diterpenes against oral pathogens. | two kaurane diterpenes, ent-kaur-16(17)-en-19-oic acid (ka) and 15-beta-isovaleryloxy-ent-kaur-16(17)-en-19-oic acid (ka-ival), isolated from aspilia foliacea, and the methyl ester derivative of ka (ka-me) were evaluated against oral pathogens. ka was the most active compound, with mic values of 10 microg ml(-1) against the following microorganisms: streptococcus sobrinus, streptococcus mutans, streptococcus mitis, streptococcus sanguinis, and lactobacillus casei. however, ka did not show signif ... | 2008 | 18669015 |
| the role of streptococcal hypersensitivity in the pathogenesis of behçet's disease. | behçet's disease (bd) is still considered as a mysterious multisystemic disorder characterized by recurrent involvement of muco-cutaneous, ocular, intestinal, vascular and/or nervous system organs. in this review, we would like to highlight and discuss several important advances in our understanding of the pathogenesis of bd based on the intrinsic genetic factors including hla-b51 and mica expression and extrinsic triggering factors. as one of the extrinsic triggering factors, we focused on the ... | 2008 | 18693149 |
| [the role of antibiotic-therapy referral in therapeutic innovation. apropos of a case of streptococcal endocarditis]. | 2008 | 19185202 | |
| [protease activity of microflora in the oral cavity of patients with periodontitis]. | microbial spectrum and non-specific as well as specific iga1 protease activity of isolated microorganisms were investigated in gingival liquid of patients with periodontitis. microorganisms from the gingival liqud of these patients belonged to conditional-pathogenic obligate and facultatively anaerobic bacteria. 24 strains of microorganisms have been identified. nonspecific proteolytic activity was found in the following microorganisms: actinomyces israelii, actinomyces naeslundii, aerococcus vi ... | 2008 | 19205430 |
| antimicrobial studies on extracts of four species of stachys. | the antimicrobial activity of the methanol extracts of the dried flowering aerial parts of stachys byzantina, s. inflata, s. lavandulifolia and s. laxa (labiatae) were studied using the disc diffusion method and determination of minimum inhibitory concentration (mic) values against staphylococcus aureus, streptococcus sanguis, escherichia coli, pseudomonas aeroginosa, klebsiella pneumoniae, aspergilus niger and candida albicans. the extracts of plants exhibited concentration-dependent antibacter ... | 2008 | 20046761 |
| in vitro antimicrobial activities against cariogenic streptococci and their antioxidant capacities: a comparative study of green tea versus different herbs. | the antimicrobial activity against cariogenic bacteria, total antioxidant capacity and phenolic constituents of methanolic extracts from 11 herbs were investigated and compared with those of green tea (camellia sinensis). among the 12 tested herbs, eight herbal extracts could inhibit the growth of streptococcus sanguinis. jasmine, jiaogulan, and lemongrass were the most potent, with minimum inhibitory concentrations (mic) of 1mg/ml, while green tea was less effective, with a mic of 4mg/ml. among ... | 2008 | 26047271 |
| [discrimination of common oral streptococcus with metabonomics method]. | to evaluate the feasibility of identifying oral streptococcus by comparing their metabolic profiling, and to find a convenient and rapid way to discriminate oral microorganisms. | 2009 | 19927732 |
| inhibiting microbial adhesion to denture base acrylic resin by titanium dioxide coating. | mechanical cleaning of dentures is effective in preventing infections such as aspiration pneumonia and denture stomatitis. for denture wearers with a physical handicap and the elderly, however, mechanical cleaning can present problems. the aim of this study was to investigate the effect of coating denture base acrylic resin with titanium dioxide (tio(2)) in the inhibition of oral microbial adhesion. we prepared uniformly sized acrylic resin plates (10 mm x 10 mm x 0.5 mm), which were divided int ... | 2009 | 19941590 |
| effect of a single-use toothbrush on plaque microflora. | to study and compare the microbial flora of dental plaque after the use of a self-contaminated toothbrush and that of a single-use toothbrush. | 2009 | 20139560 |
| necrotizing fasciitis of the neck associated with lemierre syndrome. | necrotizing fasciitis of the head and neck is a rare, life-threatening, soft tissue infection rapidly involving superficial fat and fascia with necrosis of the overlying skin. if septic thrombophlebitis of the internal jugular vein complicates a parapharyngeal abscess, the clinical condition is referred to as lemierre syndrome, also known as post-anginal sepsis. a lethal case of necrotizing fasciitis of the neck is herewith reported that developed following tooth extraction and was complicated b ... | 2009 | 20140163 |
| an in vitro antimicrobial activity of ten iranian-made toothpastes. | antimicrobial agents have been used as a chemotherapeutic agent to improve oral health. this in vitro study was carried out to determine the antimicrobial activity of ten iranian-made toothpastes against commonly found bacteria in the oral cavity. | 2009 | 21528037 |
| phylogenetic analyses and detection of viridans streptococci based on sequences and denaturing gradient gel electrophoresis of the rod shape-determining protein gene. | population analysis of viridans streptococci is important because these species are associated with dental caries, bacteremia, and subacute endocarditis, in addition to being important members of the human oral commensal microbiota. | 2009 | 21523207 |
| [bacteriological spectrum of periodontal pocket in patients with coronary heart disease and myocardial infarction]. | in the last years literature has paid attention to positive correlation between periodontitis and coronary heart disease, acute coronary events, including myocardial infarction. mechanisms of this relationship are not completely known. one of the research trends for elucidation of these problems are bacteriological studies. the aim of this study was qualitative and quantitative evaluation of bacterial flora of the periodontal pocket in patients with coronary heart disease and myocardial infarcti ... | 2009 | 20043579 |
| distribution of selected cariogenic bacteria in five different intra-oral habitats in young children. | knowledge of the colonization patterns and composition of the oral microbiota can lead to a better understanding of disease initiation. | 2009 | 19207737 |
| does pregnancy have an impact on the subgingival microbiota? | we investigated clinical and subgingival microbiologic changes during pregnancy in 20 consecutive pregnant women > or =18 years not receiving dental care. | 2009 | 19228092 |
| bacterial profiles of oral streptococcal and periodontal bacterial species in saliva specimens from japanese subjects. | recent developments in molecular biological techniques have increased understanding of the distribution of oral bacterial species in clinical specimens, though few investigations have been conducted to simultaneously detect oral streptococcal and periodontal species in the same specimens. the purpose of the present study was to investigate the distribution and correlation of 6 oral streptococcal and 6 periodontal species in saliva specimens taken from children and their mothers. | 2009 | 19230860 |
| analytical specificity and sensitivity of a real-time polymerase chain reaction assay for identification of bovine mastitis pathogens. | intramammary infection (imi), also known as mastitis, is the most frequently occurring and economically the most important infectious disease in dairy cattle. this study provides a validation of the analytical specificity and sensitivity of a real-time pcr-based assay that identifies 11 major pathogen species or species groups responsible for imi, and a gene coding for staphylococcal beta-lactamase production (penicillin resistance). altogether, 643 culture isolates originating from clinical bov ... | 2009 | 19233788 |
| correlations of oral bacterial arginine and urea catabolism with caries experience. | alkali generation by oral bacteria plays a key role in plaque ph homeostasis and may be a major impediment to the development of dental caries. to determine if the capacity of oral samples to produce ammonia from arginine or urea was related to caries experience, the arginine deiminase system (ads) and urease activity in saliva and dental plaque samples were measured in 45 adult subjects. | 2009 | 19239634 |
| pcr detection of bacterial genes provides evidence of death by drowning. | we have developed a sensitive and specific pcr method for detecting plankton dna in cases of death by drowning. however, this pcr method could not be used for cases of drowning in water containing no plankton. bacteria species are normally localized in the throat and trachea and they may invade into blood through the respiratory tract in people who have drowned as well as species localized in water. the aim of this study was to establish a novel and expedient pcr method for detecting bacterial g ... | 2009 | 19264526 |
| surface characterization of dental ceramics and initial streptococcal adhesion in vitro. | the aim of this in vitro study was to investigate the surface properties of dental ceramic materials belonging to different ceramic classes, and to correlate the findings to the initial adherence of three oral streptococcal strains. | 2009 | 19278720 |
| tlr2 sensing of f. nucleatum and s. sanguinis distinctly triggered gingival innate response. | gingival tissue faces constant exposure to micro-organisms. it functions as part of the host response, an anti-microbial barrier that recognizes and discriminates between commensal and pathogenic bacteria. this study aimed to evaluate and compare the effects of cell wall extracts from different periodontal bacteria, commensals streptococcus sanguinis and fusobacterium nucleatum and the pathogen porphyromonas gingivalis, on the innate immune response of gingival keratinocytes and the role of tlr2 ... | 2009 | 19299164 |
| activity of panduratin a isolated from kaempferia pandurata roxb. against multi-species oral biofilms in vitro. | the formation of dental biofilm caused by oral bacteria on tooth surfaces is the primary step leading to oral diseases. this study was performed to investigate the preventive and reducing effects of panduratin a, isolated from kaempferia pandurata roxb., against multi-species oral biofilms consisting of streptococcus mutans, streptococcus sanguis and actinomyces viscosus. minimum inhibitory concentration (mic) of panduratin a was determined by the clinical and laboratory standards institute (cls ... | 2009 | 19325204 |
| in vitro adherence of oral streptococci to zirconia core and veneering glass-ceramics. | plaque formation on dental ceramics may cause gingival inflammation and secondary caries. this in vitro study compared the susceptibility of various dental ceramics to adhere oral streptococci, and verified the influence of substratum surface roughness and surface hydrophobicity. three zirconia ceramic materials and three veneering glass-ceramics were investigated. fifteen test specimens were prepared for each material, polished, and surface roughness and hydrophobicity were determined. after in ... | 2009 | 19388092 |
| contribution of lipoproteins and lipoprotein processing to endocarditis virulence in streptococcus sanguinis. | streptococcus sanguinis is an important cause of infective endocarditis. previous studies have identified lipoproteins as virulence determinants in other streptococcal species. using a bioinformatic approach, we identified 52 putative lipoprotein genes in s. sanguinis strain sk36 as well as genes encoding the lipoprotein-processing enzymes prolipoprotein diacylglyceryl transferase (lgt) and signal peptidase ii (lspa). we employed a directed signature-tagged mutagenesis approach to systematically ... | 2009 | 19395487 |
| in vitro evaluation of yoghurt starter lactobacilli and lactobacillus rhamnosus gg adhesion to saliva-coated surfaces. | the aim of the study was to evaluate the adhesion of lactobacillus delbrueckii subsp. bulgaricus and lactobacillus rhamnosus strain gg to saliva-coated surfaces in vitro. | 2009 | 19416451 |
| development of genetic tools for in vivo virulence analysis of streptococcus sanguinis. | completion of the genome sequence of streptococcus sanguinis sk36 necessitates tools for further characterization of this species. it is often desirable to insert antibiotic resistance markers and other exogenous genes into the chromosome; therefore, we sought to identify a chromosomal site for ectopic expression of foreign genes, and to verify that insertion into this site did not affect important cellular phenotypes. we designed three plasmid constructs for insertion of erm, aad9 or tetm resis ... | 2009 | 19423626 |
| increased d-lactic acid intestinal bacteria in patients with chronic fatigue syndrome. | patients with chronic fatigue syndrome (cfs) are affected by symptoms of cognitive dysfunction and neurological impairment, the cause of which has yet to be elucidated. however, these symptoms are strikingly similar to those of patients presented with d-lactic acidosis. a significant increase of gram positive facultative anaerobic faecal microorganisms in 108 cfs patients as compared to 177 control subjects (p<0.01) is presented in this report. the viable count of d-lactic acid producing enteroc ... | 2009 | 19567398 |
| fluoride, triclosan and organic weak acids as modulators of the arginine deiminase system in biofilms and suspension cells of oral streptococci. | the arginine deiminase system (ads) of oral bacteria is a major generator of alkali (ammonia) in dental plaque and is considered to have anticaries effects. however, many of the antimicrobial agents used in oral care products may reduce alkali production by the ads. the objective of our work was to assess the sensitivity of the ads of oral streptococci to commonly used antimicrobials, fluoride, triclosan and organic weak acids. | 2009 | 19572886 |
| transient acid-impairment of growth ability of oral streptococcus, actinomyces, and lactobacillus: a possible ecological determinant in dental plaque. | dental plaque ph decreases to about 4 through bacterial fermentation of carbohydrates and this low ph is maintained for from several minutes to about an hour. repeated acidification causes demineralization of the tooth surface, resulting in caries formation. the acidification also influences plaque bacteria. severe acidification kills bacteria efficiently, while physiological acidification, the condition occurring in plaque, kills bacteria partially and may impair growth ability. we, therefore, ... | 2009 | 19572895 |
| bacteriostatic effect of piper betle and psidium guajava extracts on dental plaque bacteria. | in this study, the bacteriostatic effect of piper betle and psidium guajava extracts on selected early dental plaque bacteria was investigated based on changes in the doubling time (g) and specific growth rates (micro). streptococcus sanguinis, streptococcus mitis and actinomyces sp. were cultured in brain heart infusion (bhi) in the presence and absence of the extracts. the growth of bacteria was monitored periodically every 15 min over a period of 9 h to allow for a complete growth cycle. grow ... | 2009 | 19580002 |
| molecular characterization of macrolide resistance determinants [erm(b) and mef(a)] in streptococcus pneumoniae and viridans group streptococci (vgs) isolated from adult patients with cystic fibrosis (cf). | although long-term use of azithromycin has shown a significant clinical improvement for patients with cystic fibrosis (cf), its long-term effect on the susceptibility of commensal flora within cf airways has not yet been examined. we therefore suggest that long-term use of azithromycin increases macrolide resistance in commensal streptococci. | 2009 | 19584106 |
| effect of lactoperoxidase on the antimicrobial effectiveness of the thiocyanate hydrogen peroxide combination in a quantitative suspension test. | the positive antimicrobial effects of increasing concentrations of thiocyanate (scn-) and h2o2 on the human peroxidase defence system are well known. however, little is known about the quantitative efficacy of the human peroxidase thiocyanate h2o2 system regarding streptococcus mutans and sanguinis, as well as candida albicans. the aim of this study was to evaluate the effect of the enzyme lactoperoxidase on the bactericidal and fungicidal effectiveness of a thiocyanate-h2o2 combination above th ... | 2009 | 19589149 |
| influence of a model human defensive peroxidase system on oral streptococcal antagonism. | streptococcus is a dominant genus in the human oral cavity, making up about 20 % of the more than 800 species of bacteria that have been identified, and about 80 % of the early biofilm colonizers. oral streptococci include both health-compatible (e.g. streptococcus gordonii and streptococcus sanguinis) and pathogenic strains (e.g. the cariogenic streptococcus mutans). because the streptococci have similar metabolic requirements, they have developed defence strategies that lead to antagonism (als ... | 2009 | 19684069 |
| characterization of hydrogen peroxide-induced dna release by streptococcus sanguinis and streptococcus gordonii. | extracellular dna (edna) is produced by several bacterial species and appears to contribute to biofilm development and cell-cell adhesion. we present data showing that the oral commensals streptococcus sanguinis and streptococcus gordonii release dna in a process induced by pyruvate oxidase-dependent production of hydrogen peroxide (h(2)o(2)). surprisingly, s. sanguinis and s. gordonii cell integrity appears unaffected by conditions that cause autolysis in other edna-producing bacteria. exogenou ... | 2009 | 19684131 |
| oral bacteremia as a cause of prosthesis failure in patients with joint replacements. | 2009 | 19686911 | |
| interference with aggregatibacter actinomycetemcomitans: colonization of epithelial cells under hydrodynamic conditions. | microbial interactions are considered to be important for bacterial colonization. interactions that inhibit colonization of pathogens could possibly be used as a new treatment approach for periodontitis. the aim of this study was to test this hypothesis on soft surfaces in vitro, taking into account the hydrodynamic forces continuously present in vivo. | 2009 | 19702952 |
| comprehensive evaluation of streptococcus sanguinis cell wall-anchored proteins in early infective endocarditis. | streptococcus sanguinis is a member of the viridans group of streptococci and a leading cause of the life-threatening endovascular disease infective endocarditis. initial contact with the cardiac infection site is likely mediated by s. sanguinis surface proteins. in an attempt to identify the proteins required for this crucial step in pathogenesis, we searched for surface-exposed, cell wall-anchored proteins encoded by s. sanguinis and then used a targeted signature-tagged mutagenesis (stm) appr ... | 2009 | 19703977 |
| in vitro adhesion of streptococcus sanguinis to dentine root surface after treatment with er:yag laser, ultrasonic system, or manual curette. | the purpose of this in vitro study was to evaluate the dentine root surface roughness and the adherence of streptococcus sanguinis (atcc 10556) after treatment with an ultrasonic system, er:yag laser, or manual curette. | 2009 | 19712018 |
| dyspnea and multiple pulmonary nodules. | 2009 | 19717265 | |
| contemporary root canal irrigants are able to disrupt and eradicate single- and dual-species biofilms. | clinical/microbiological studies have consistently revealed the persistence of some bacteria after conventional root canal debridement. although this was originally attributed to the complexity of the root canal anatomy and the difficulty of delivering antibacterial agents effectively, it has emerged that the biofilm encasement of bacterial cells may confer a further mechanism of resistance. the purpose of this study was to investigate the relative disruption and bactericidal effects of root can ... | 2009 | 19720223 |
| comparisons of subgingival microbial profiles of refractory periodontitis, severe periodontitis, and periodontal health using the human oral microbe identification microarray. | this study compared the subgingival microbiota of subjects with refractory periodontitis (rp) to those in subjects with treatable periodontitis (grs = good responders) or periodontal health (ph) using the human oral microbe identification microarray (homim). | 2009 | 19722792 |
| oral streptococcus species in pre-term and full-term children - a longitudinal study. | despite high clinical significance, the microbiology of the dental biofilm in young children remains poorly understood. | 2009 | 19732193 |
| angiogenic signaling triggered by cariogenic bacteria in pulp cells. | the inflammation observed in the dental pulp of teeth with deep caries lesions is characterized by a significant increase in blood vessel density. it is known that lipoteichoic acid (lta) from gram-positive cariogenic bacteria induces expression of vascular endothelial growth factor (vegf) in dental pulp cells. the hypothesis underlying this study was that lta induces vegf expression in dental pulp cells through tlr2 and pi3k/akt signaling. odontoblast-like cells (mdpc-23) and undifferentiated p ... | 2009 | 19767581 |
| bactericidal activity in filtrated supernatant of streptococcus sanguinis against multidrug-resistant pseudomonas aeruginosa. | in the past decade, multidrug-resistant pseudomonas aeruginosa (mdrp) infection has become a serious clinical problem, due to the limitation of drug choices to fight against the bacteria. here we explored the bactericidal activity in the filtrated supernatant of streptococcus (s.) sanguinis against pseudomonas (p.) aeruginosa. s. sanguinis is one of the alpha-hemolytic streptococci that commonly reside in the human oral cavity. a strain of s. sanguinis, isolated from the sputum of a pulmonary-di ... | 2009 | 19776523 |
| [uremia ever turns to the aching tooth!]. | 2009 | 19802800 | |
| inhibiting effects of enterococcus faecium non-biofilm strain on streptococcus mutans biofilm formation. | enterococcus faecium is a normal bowel commensal and lactic acid bacterium that is rarely found in the oral cavity. this study investigated whether a non-pathogenic and non-biofilm strain of e. faecium functioned as a probiotic strain toward biofilm formation by streptococcus mutans, which is an etiological agent for dental caries. | 2009 | 19812852 |
| microbial interactions influence inflammatory host cell responses. | the inflammatory response plays an important role in the tissue destruction associated with periodontitis. bacterial species can regulate the inflammatory responses of host cells, triggered by pathogens. it was hypothesized that, in the field of oral microbiology/immunology, such effects of bacterial interactions on inflammatory host cell responses might also be present. in this study, the effects of beneficial, commensal, and pathogenic species on aggregatibacter actinomycetemcomitans-induced i ... | 2009 | 19828891 |
| spray bacteriotherapy decreases middle ear fluid in children with secretory otitis media. | secretory otitis media (som) is characterised by persistent fluid in the middle ear cavity, but the cause is unknown. we investigated the clinical, bacteriological and immunological effects of treatment with probiotic bacteria on som. | 2009 | 18713796 |
| streptococcal adhesion to novel low-shrink silorane-based restorative. | the aim of the present study was to compare the susceptibility of one novel silorane-based and four widely used conventional methacrylate-based resin composites to adhere oral streptococci and to relate any differences to surface roughness, hydrophobicity and type of matrix. | 2009 | 18768217 |
| effects of alpha-amylase and its inhibitors on acid production from cooked starch by oral streptococci. | this study evaluated acid production from cooked starch by streptococcus mutans, streptococcus sobrinus, streptococcus sanguinis and streptococcus mitis, and the effects of alpha-amylase inhibitors (maltotriitol and acarbose) and xylitol on acid production. streptococcal cell suspensions were anaerobically incubated with various carbohydrates that included cooked potato starch in the presence or absence of alpha-amylase. subsequently, the fall in ph and the acid production rate at ph 7.0 were me ... | 2009 | 19136828 |
| fluoride released from glass-ionomer cement is responsible to inhibit the acid production of caries-related oral streptococci. | glass-ionomer cements (gics) are known to have inhibitory effects on bacterial growth, but the biochemical mechanism of this property has not been fully understood. this study aimed to evaluate inhibitory effects of gic on the acid production of caries-related oral streptococci, and to identify the components responsible for the inhibition. | 2009 | 19150126 |
| the two-component system bfrab regulates expression of abc transporters in streptococcus gordonii and streptococcus sanguinis. | the putative two-component system bfrab is involved in streptococcus gordonii biofilm development. here, we provide evidence that bfrab regulates the expression of bfrcd and bfrefg, which encode two atp-binding cassette (abc) transporters, and bfrh, which encodes a caax amino-terminal protease family protein. bfrc and bfre are atp-binding proteins, and bfrd, bfrf and bfrg are homologous membrane-spanning polypeptides. similarly, bfrabss, the bfrab homologous system in streptococcus sanguinis, co ... | 2009 | 19118357 |
| hybrid procedure for acute severe aortic regurgitation in an uncorrected adult tetralogy of fallot. | adult survivors of surgically uncorrected complex tetralogy of fallot [tof] with multiple aorto-pulmonary coronary arteries [mapcas] are unusual and the development of severe aortic regurgitation [ar] due to endocarditis is a rare and difficult problem to manage. we report a successful hybrid approach utilising temporary balloon occlusion of the collaterals during the cross-clamp time as a strategy to allow adequate brain perfusion and safe aortic root replacement. | 2009 | 19119074 |
| screening of quercus infectoria gall extracts as anti-bacterial agents against dental pathogens. | a number of bacteria have now become antibiotic-resistant. this increases the importance of ayurvedic drugs. we report, here, the activity of different extracts (petroleum ether, chloroform, methanol and water) of quercus infectoria galls against dental pathogens -- streptococcus mutans, streptococcus salivarius, staphylococcus aureus, lactobacillus acidophilus (designated) and streptococcus sanguis (isolated). | 2009 | 19884719 |
| decontamination efficacy of antiseptic agents on in vivo grown biofilms on rough titanium surfaces. | four common antimicrobial agents were evaluated for their efficacy in reduction of aerobic bacteria intraorally grown in biofilms on rough titanium samples. the solutions investigated contained chlorhexidine, essential oil, octenidine, or citric acid. | 2009 | 19898707 |
| bacterial adhesion on smooth and rough titanium surfaces after treatment with different instruments. | newly formed biofilm after implant debridement may challenge the long-term stability of peri-implant therapy. this in vitro study aimed to assess the roughness and adherence of streptococcus sanguinis after treatment of smooth and rough titanium surfaces with an erbium-doped:yttrium, aluminum, and garnet (er:yag) laser, metal and plastic curets, and an air-powder abrasive system. | 2009 | 19905952 |
| factors affecting human supragingival biofilm composition. ii. tooth position. | little is known regarding the factors that affect the microbial composition of supragingival biofilms. this study was designed to test the hypothesis that tooth location affects the microbial composition of supragingival plaque beyond the effect due to plaque mass as reflected by total dna probe count. | 2009 | 18973539 |
| the fusobacterium nucleatum outer membrane protein radd is an arginine-inhibitable adhesin required for inter-species adherence and the structured architecture of multispecies biofilm. | a defining characteristic of the suspected periodontal pathogen fusobacterium nucleatum is its ability to adhere to a plethora of oral bacteria. this distinguishing feature is suggested to play an important role in oral biofilm formation and pathogenesis, with fusobacteria proposed to serve as central 'bridging organisms' in the architecture of the oral biofilm bringing together species which would not interact otherwise. previous studies indicate that these bacterial interactions are mediated b ... | 2009 | 19007407 |
| in vivo and in vitro biofilm formation on two different titanium implant surfaces. | the aim of the present in vitro and human in vivo study was twofold: first, to evaluate the initial biofilm formation on different titanium implant surfaces by means of two highly sensitive fluorescent techniques and, second, to correlate these findings to different surface properties. | 2010 | 19912269 |
| partial recn gene sequencing: a new tool for identification and phylogeny within the genus streptococcus. | partial sequences of the recn gene (1249 bp), which encodes a recombination and repair protein, were analysed to determine the phylogenetic relationship and identification of streptococci. the partial sequences presented interspecies nucleotide similarity of 56.4-98.2 % and intersubspecies similarity of 89.8-98 %. the mean dna sequence similarity of recn gene sequences (66.6 %) was found to be lower than those of the 16s rrna gene (94.1 %), rpob (84.6 %), soda (74.8 %), groel (78.1 %) and gyrb ( ... | 2010 | 19880633 |
| modeling of diffusion transport through oral biofilms with the inverse problem method. | the purpose of this study was to develop a mathematical model to quantitatively describe the passive transport of macromolecules within dental biofilms. | 2010 | 21404968 |
| investigation of bacteremia following insertion of orthodontic mini-implants. | aim: to investigate the incidence of bacteremia in the bloodstream immediately after orthodontic mini-implant insertion, which can be an invasive procedure. methods: blood samples (10 ml) were taken before and after mini-implant insertion from 40 patients (18 males, 22 females; mean age 21.3 ± 7.7 years). these samples were inoculated into bact/alert aerobic and anaerobic blood culture bottles and processed in a bact/alert 9240 blood culture system. the findings were analyzed with the mcnemar te ... | 2010 | 21491002 |
| clonal analysis of the microbiota of severe early childhood caries. | severe early childhood caries is a microbial infection that severely compromises the dentition of young children. the aim of this study was to characterize the microbiota of severe early childhood caries. | 2010 | 20861633 |
| identification of streptococcal proteins reacting with sera from behçet's disease and rheumatic disorders. | we evaluated the reactivity of sera from behçet's disease (bd), systemic lupus erythematosus (sle), dermatomyositis (dm), rheumatoid arthritis (ra), and takayasu's arteritis (ta) patients against human α-enolase and streptococcal α-enolase, and identified additional streptococcal antigens. | 2010 | 20868568 |
| investigation of supragingival plaque microbiota in different caries status of chinese preschool children by denaturing gradient gel electrophoresis. | this study aimed to detect differences in the richness of total supragingival plaque microbiota as well as the species composition of oral streptococci involved in the different stages of dental caries. forty-five plaque samples were collected from caries-moderate (cm, 4 ≤ dmfs ≤ 6), caries-susceptible (cs, dmfs ≥ 10), and age-matched caries-free children separately. total dna was isolated directly from each sample, and polymerase chain reaction-denaturing gradient gel electrophoresis (pcr-dgge) ... | 2010 | 20927511 |
| bactericidal activity of stabilized chlorine dioxide as an endodontic irrigant in a polymicrobial biofilm tooth model system. | the purpose of this study was to determine bactericidal efficacy of 0.04% stabilized chlorine dioxide, 3% sodium hypochlorite, 2% chlorhexidine gluconate, and sterile distilled water in a polymicrobial biofilm model. | 2010 | 20951304 |
| myeloperoxidase selectively binds and selectively kills microbes. | myeloperoxidase (mpo) is reported to selectively bind to bacteria. the present study provides direct evidence of mpo binding selectivity and tests the relationship of selective binding to selective killing. the microbicidal effectiveness of h(2)o(2) and of ocl(-) was compared to that of mpo plus h(2)o(2). synergistic microbicidal action was investigated by combining streptococcus sanguinis, a h(2)o(2)-producing microbe showing low mpo binding, with high-mpo-binding escherichia coli, staphylococc ... | 2010 | 20974824 |
| catabolite control protein a controls hydrogen peroxide production and cell death in streptococcus sanguinis. | streptococcus sanguinis is a commensal oral bacterium producing hydrogen peroxide (h₂o₂) that is dependent on pyruvate oxidase (spx) activity. in addition to its well-known role in bacterial antagonism during interspecies competition, h₂o₂ causes cell death in about 10% of the s. sanguinis population. as a consequence of h₂o₂-induced cell death, largely intact chromosomal dna is released into the environment. this extracellular dna (edna) contributes to the self-aggregation phenotype under aerob ... | 2010 | 21036992 |
| behçet's disease (adamantiades-behçet's disease). | adamantiades-behçet's disease (abd) is characterized by starting with oral aphthous ulceration and developing of the systemic involvements. the pathogenesis of abd is closely correlated with the genetic factors and the triggering factors which acquire delayed-type hypersensitivity reaction against oral streptococci mediated by il-12 cytokine family. hla-b51 is associated in more than 60% of the patients and its restricted cd8+ t cell response is clearly correlated with the target tissues. bes-1 ... | 2010 | 21052488 |
| antibacterial activity and cytotoxicity of two novel cross-linking antibacterial monomers on oral pathogens. | the antibacterial activity and cytotoxicity of two novel cross-linking antibacterial monomers, 2-methacryloxylethyl dodecyl methyl ammonium bromide (mae-db) and 2-methacryloxylethyl hexadecyl methyl ammonium bromide (mae-hb) were tested in this study. | 2010 | 21074143 |
| antibacterial activity of the essential oil from rosmarinus officinalis and its major components against oral pathogens. | the essential oil of rosmarinus officinalis l. (rosemary) was obtained by hydro-distillation and analysed by gas chromatography-mass spectrometry. sixty-two constituents were identified, representing 98.06% of the total oil content. oxygenated monoterpenes were the predominant components. the rosemary oil was characterized as having prominent (> 5%) contents of camphor (18.9%), verbenone (11.3%), a-pinene (9.6%), beta-myrcene (8.6%), 1,8-cineole (8.0%), and beta-caryophyllene (5.1%). the antimic ... | 2010 | 21138060 |
| ovarian hydrobursitis in female camels (camelus dromedaries): biochemical, bacterial and protozoal evaluation. | the aim of this study was to evaluate female camels affected with ovarian hydrobursitis (n = 31) for hematological and biochemical findings and for bacterial and protozoal infections. blood samples were obtained and surgical ablation of the affected bursa was performed. bursal fluid, follicular fluid, and serum were subjected to hormonal and biochemical analyses. bursal fluids were cultured and colonies were identified using biomérieux vitek two compact system. passive haemagglutination test was ... | 2010 | 21144565 |
| novel magnesium phosphate cements with high early strength and antibacterial properties. | magnesium phosphate cements (mpcs) have been extensively used as fast setting repair cements in civil engineering. they have properties that are also relevant to biomedical applications, such as fast setting, early strength acquisition and adhesive properties. however, there are some aspects that should be improved before they can be used in the human body, namely their highly exothermic setting reaction and the release of potentially harmful ammonia or ammonium ions. in this paper a new family ... | 2010 | 21147277 |
| molecular characterization and phylogenetic analysis of quinolone resistance-determining regions (qrdrs) of gyra, gyrb, parc and pare gene loci in viridans group streptococci isolated from adult patients with cystic fibrosis. | ciprofloxacin is the most frequently used member of the fluoroquinolones during initial eradication therapy of pseudomonas aeruginosa, as well as during acute pulmonary exacerbations. however, its long-term effect on the susceptibility of the commensal flora within the cystic fibrosis (cf) airways has not yet been examined. the aim of this study was therefore to examine the consequence of oral ciprofloxacin usage on the resistance of the commensal viridans group streptococci (vgs), in terms of m ... | 2010 | 21193474 |
| identification of different bacterial species in biofilms using confocal raman microscopy. | confocal raman microspectroscopy is used to discriminate between different species of bacteria grown in biofilms. tests are performed using two bacterial species, streptococcus sanguinis and streptococcus mutans, which are major components of oral plaque and of particular interest due to their association with healthy and cariogenic plaque, respectively. dehydrated biofilms of these species are studied as a simplified model of dental plaque. a prediction model based on principal component analys ... | 2010 | 21198175 |
| an antimicrobial effect from silver-coated toothbrush heads. | to examine the antimicrobial effect of silver-coated toothbrush heads in vitro. | 2010 | 21207790 |
| antimicrobial and anti-adhesive potential of a biosurfactant rufisan produced by candida lipolytica ucp 0988. | in the last years, researches developed with biosurfactants for application in the medical area have been revealing the promising biological activities of these biomolecules. in this work the antimicrobial and anti-adhesive properties of a biosurfactant rufisan isolated from the yeast candida lipolytica ucp 0988, growth in a medium supplemented with ground nut refinery residue was determined against several microorganisms. the biosurfactant was able to reduce the water surface tension from 70 to ... | 2010 | 21247740 |
| structure modeling of novel dna glycosylase enzyme from oral pathogen streptococcus sanguinis. | the novel 3-methyladenine dna glycosylase enzyme from oral pathogen streptococcus sanguinisin involves in dna repair mechanisms and participates in base excision repair. its 3d structure is still unknown which may be a potential drug target, therefore here we proposed its putative 3d structure by homology modeling approach. esypred3d software produced more precise modeled structure as compare to swiss model software. the modeled structure was further verified by procheck analysis and subjected t ... | 2010 | 21364794 |
| effects of ultrasonic, electric, and manual toothbrushes on subgingival plaque composition in orthodontically banded molars. | orthodontic appliances hinder mechanical plaque control. in this study, we evaluated the effect of self-performed supragingival plaque removal with ultrasonic, electric, and manual toothbrushes on subgingival plaque composition in orthodontically banded molars. | 2010 | 20152680 |
| two new phenylpropanoid derivatives and other constituents from illicium simonsii active against oral microbial organisms. | bioassay-guided fractionation of the ethanol extract of the leaves and stems of illicium simonsii led to the isolation of two new compounds, simonin a (1) and 1-hydroxyl-2- o- β- d-6'-acetyl-glucopyranosyl-4-allylbenzene (2), along with eight known compounds. their structures were elucidated by spectroscopic analysis. the isolates were tested for anti-oral microbial activity using a microdilution method. compounds 1 and 3- 6 showed significant activities against oral microbial organisms (actinom ... | 2010 | 20195962 |
| [dissertations 25 years after date 21. enhancing resistance to bacteria with chlorhexidine varnish and probiotics]. | the aim of the research described in 'chemotherapy against streptococcus mutans' was to increase colonization resistance against mutans streptococci by inoculating actinomyces naeslundii on the dentition. actinomyces naeslundii established better after chlorhexidine application than after dental cleansing only but did not exceed the 1% level of the total actinomyces population. this was insufficient to increase the colonization resistance against mutans streptococci. a 33% chlorhexidine varnish ... | 2010 | 20225702 |
| [establishment and evaluation of the in vitro dynamic biofilm model]. | to establish a dynamic model which could simulate the ecologic environment of oral cavity and study the cariogenicity of oral biofilm, continuously observe the formation of oral biofilm. | 2010 | 20300696 |
| role of streptococcus mutans eukaryotic-type serine/threonine protein kinase in interspecies interactions with streptococcus sanguinis. | interspecies interactions of oral streptococci involve the production and excretion of antimicrobial compounds to compete successfully during colonization. bacteriocin production by streptococcus mutans and hydrogen peroxide (h2o2) production by streptococcus sanguinis have been demonstrated as crucial for the clinical relevant antagonism between both species. a potential target of h2o2 is the cell-envelop of s. mutans. in the present study, the role of cell-envelop associated eukaryotic serine/ ... | 2010 | 20381010 |
| an electron microscopy study of the diversity of streptococcus sanguinis cells induced by lysozyme in vitro. | bacterial virulence could be altered by the antimicrobial agents of the host. our aim was to identify the damage and survival of streptococcus sanguinis induced by lysozymes in vitro and to analyse the potential of oral microorganisms to shirk host defences, which cause infective endocarditis. s. sanguinis atcc 10556 received lysozyme at concentrations of 12.5, 25, 50 and 100 microg/ml. cells were examined by electron microscopy. the survival was assessed by colony counting and construction of a ... | 2010 | 20388619 |
| biofilm formation and virulence expression by streptococcus mutans are altered when grown in dual-species model. | microbial cell-cell interactions in the oral flora are believed to play an integral role in the development of dental plaque and ultimately, its pathogenicity. the effects of other species of oral bacteria on biofilm formation and virulence gene expression by streptococcus mutans, the primary etiologic agent of dental caries, were evaluated using a dual-species biofilm model and realtime-pcr analysis. | 2010 | 20398271 |