Publications
| Title | Abstract | Year(sorted descending) Filter | PMID Filter |
|---|
| 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 |
| adhesion of streptococcus sanguinis to glass surfaces measured by isothermal microcalorimetry (imc). | bacterial adhesion is the first step in the development of the oral biofilm, called dental plaque. plaque is the cause of caries, periodontal diseases, and periimplantitis. investigations of dental plaque, including bacterial adhesion, employ various in vivo and in vitro models using microscopic methods. microcalorimetry offers another direct approach. the model organism streptococcus sanguinis is one of the first colonizers adhering to the saliva-coated human tooth surfaces or dental materials ... | 2008 | 17696148 |
| in vitro anti-biofilm activity of macelignan isolated from myristica fragrans houtt. against oral primary colonizer bacteria. | in early dental plaque formation, oral primary colonizers such as streptococcus mutans, streptococcus sanguis and actinomyces viscosus are initially attached to the pellicle-coated tooth surface to form a biofilm. the study aimed to determine the efficacy of macelignan, isolated from nutmeg (myristica fragrans houtt.), in removing each single oral primary biofilm in vitro on a polystyrene 96-well microtiter plate. four biofilm growth phases (4, 12, 20 and 24 h) were evaluated in this study after ... | 2008 | 17926328 |
| differential expression of toll-like receptor 6 on granulocytes and monocytes implicates the role of microorganisms in behcet's disease etiopathogenesis. | the objective of this study was to investigate the expressions of toll-like receptors on neutrophils and monocytes in behcet's disease (bd). forty-two patients with bd were included in the study. baseline and stimulated cells with heat shock protein-60 (hsp-60), lipopolysaccharide (lps) and crude extract of streptococcus sanguis (ss) were analyzed for toll-like receptor-1, -2, -4 and -6 expressions using flow cytometer. results were confirmed using semi-quantitative pcr technique. the mean frequ ... | 2008 | 17934735 |
| stimulation of fusobacterium nucleatum biofilm formation by porphyromonas gingivalis. | bacterial infection is a major cause of periapical periodontitis. eradication of these microorganisms from apical lesions is essential to the success of endodontic treatment. the aim of this study was to clarify the molecular interaction between fusobacterium nucleatum, porphyromonas gingivalis and other microorganisms associated with periapical periodontitis. | 2008 | 18173791 |
| reduction of periodontal pathogens adhesion by antagonistic strains. | periodontitis results from a shift in the subgingival microflora into a more pathogenic direction with porphyromonas gingivalis, prevotella intermedia, and actinobacillus actinomycetemcomitans considered as periodontopathogens. in many cases, treatment procures only a temporary shift towards a less pathogenic microflora. an alternative treatment could be the deliberate colonization of pockets with antagonistic microorganisms to control the adhesion of periodontopathogens. the aim of this study w ... | 2008 | 18173797 |
| effect of cigarette smoke exposure on the growth of streptococcus mutans and streptococcus sanguis: an in vitro study. | the aim of the present study was to determine the effect of cigarette smoke on the growth of streptococcus mutans and streptococcus sanguis. the standard strains of s. mutans (atcc 25175) and s. sanguis (atcc 10556) were cultured on blood agar and incubated for 48 hr in three main environments: atmospheric air, carbon dioxide, and cigarette smoke. kent gold 1(nicotine: 0.1 mg, tar: 1 mg), kent lights (nicotine: 0.8 mg, tar: 9 mg) and bahman (nicotine: 1 mg, tar: 13 mg) were the brands used in th ... | 2008 | 18188746 |
| microflora in oral ecosystems in subjects with radiation-induced hyposalivation. | to analyse the microbial flora in specific oral sites in 13 dentate subjects, 6-8 months after completed radiation therapy (rt group) and in 13 matched controls. | 2008 | 18208474 |
| smap29 congeners demonstrate activity against oral bacteria and reduced toxicity against oral keratinocytes. | cathelicidins are antimicrobial peptides found in epithelial and mucosal tissues as well as the secondary granules of neutrophils. smap29, a sheep cathelicidin, has differential antimicrobial properties against various pathogens, including periodontal organisms. the purpose of this study was to evaluate the antimicrobial properties and cytotoxicity of smap29, smap28, and three congeners (smap18a, smap18d, and smap14a). | 2008 | 18279175 |
| interactions between salivary bifidobacterium adolescentis and other oral bacteria: in vitro coaggregation and coadhesion assays. | coaggregation assays were performed to investigate interactions between oral bifidobacterium adolescentis and other oral bacterial species. bifidobacterium adolescentis olb6410 isolated from the saliva of healthy humans did not coaggregate with actinomyces naeslundii jcm8350, streptococcus mitis ols3293, streptococcus sanguinis jcm5708, veillonella parvula atcc17745 or porphyromonas gingivalis ob7124, but it did coaggregate with fusobacterium nucleatum jcm8532. subsequent examination of biofilm ... | 2008 | 18312575 |
| periodontitis is associated with a loss of colonization by streptococcus sanguinis. | the aim of this study was to estimate differences in the prevalence of oral streptococcal species in the subgingival biofilm of patients with aggressive periodontitis and of healthy controls. thirty-three patients with clinical and radiological proof of aggressive periodontitis and 20 healthy subjects were enrolled in this study. clinical indices were recorded in a six-point measurement per tooth. samples of the subgingival biofilm were taken with paper points from four teeth of each individual. ... | 2008 | 18349371 |
| [the influence of streptococcus sanguis on corrosion resistance of magnetic retainer]. | to study the effect of streptococcus sanguis on corrosion resistance of magnetic retainers in which are encapsulated with stainless steel artificial saliva. | 2008 | 18360677 |
| screening of amazonian plants from the adolpho ducke forest reserve, manaus, state of amazonas, brazil, for antimicrobial activity. | tropical forests are species-rich reserves for the discovery and development of antimicrobial drugs. the aim of this work is to investigate the in vitro antimicrobial potential of amazon plants found within the national institute on amazon research's adolpho ducke forest reserve, located in manaus, state of amazonas, brazil. 75 methanol, chloroform and water extracts representing 12 plant species were tested for antimicrobial activity towards strains of mycobacterium smegmatis, escherichia coli, ... | 2008 | 18368234 |
| identification of streptococcus sanguinis genes required for biofilm formation and examination of their role in endocarditis virulence. | streptococcus sanguinis is one of the pioneers in the bacterial colonization of teeth and is one of the most abundant species in the oral biofilm called dental plaque. s. sanguinis is also the most common viridans group streptococcal species implicated in infective endocarditis. to investigate the association of biofilm and endocarditis, we established a biofilm assay and examined biofilm formation with a signature-tagged mutagenesis library of s. sanguinis. four genes that have not previously b ... | 2008 | 18390999 |
| [effects of oral streptococci on biofilm formation by cariogenic bacteria in dual species cultures]. | the effects of oral commensal streptococci (streptococcus sanguinis, streptococcus gordonii, streptococcus mitis, and streptococcus salivarius) on biofilm formation by cariogenic mutans streptococci (streptococcus mutans and streptococcus sobrinus) were investigated. cell suspensions were cultured on 96-well microtiter plates coated with or without salivary components (sc), and in flow cell systems coated with sc in tryptic soy broth including 0.25% sucrose without dextrose (tsb). the resultant ... | 2008 | 18421950 |
| [clinical aspects of microbial colonization of temporary dentures from acrylates]. | 2008 | 18431864 | |
| antimicrobial effect and ph of chlorhexidine gel and calcium hydroxide alone and associated with other materials. | the purposes of this study were to evaluate the effectiveness of 2% chlorhexidine (chx) gluconate gel, calcium hydroxide [ca(oh)2] and their combination with iodoform and zinc oxide powder as intracanal medications against select microorganisms, and to measure the ph changes caused by these medications. antimicrobial activity was determined by the agar diffusion method. the zones of growth inhibition were measured and the results were analyzed statistically by kruskal-wallis test (p<0.05). the p ... | 2008 | 18438556 |
| streptococcal antagonism in oral biofilms: streptococcus sanguinis and streptococcus gordonii interference with streptococcus mutans. | biofilms are polymicrobial, with diverse bacterial species competing for limited space and nutrients. under healthy conditions, the different species in biofilms maintain an ecological balance. this balance can be disturbed by environmental factors and interspecies interactions. these perturbations can enable dominant growth of certain species, leading to disease. to model clinically relevant interspecies antagonism, we studied three well-characterized and closely related oral species, streptoco ... | 2008 | 18441055 |
| comparative analysis of putative periodontopathic bacteria by multiplex polymerase chain reaction. | the polymerase chain reaction (pcr) has been applied for the rapid and specific detection of periodontopathic bacteria in subgingival plaque and is potentially of clinical benefit in the diagnosis and treatment of periodontitis subjects. however, several technical points need to be modified before the conventional pcr detection system can be used by clinicians. | 2008 | 18447853 |
| ability of oral bacteria to induce tissue-destructive molecules from human neutrophils. | the induction of tissue-destructive molecules from neutrophils by periodontopathic bacteria has been suggested as one of the mechanisms of periodontal destruction. the aim of this study was to determine whether the ability to stimulate neutrophils is an authentic characteristic of periodontopathic bacteria. | 2008 | 18449962 |
| [behçet's syndrome (a complex of mucocutaneous and ocular symptoms]. | behçet's disease (bd) is a complex of symptoms, which include aphthae in the oral mucous membrane, eruptions of the skin, ulcers on genitals and eye symptoms. the disease relapses into acute episodes for many years and involves internal organs. since 1990, bd has been diagnosed by the international diagnostic criteria. during the last 20 years, bd has varied in the disease expression. the number of patients who fill the diagnostic criteria falls, while the number who do not fill the diagnostic c ... | 2008 | 18462621 |
| adhesion of oral streptococci to all-ceramics dental restorative materials in vitro. | in recent years, patients have benefited from the development of better and more esthetic materials, including all-ceramics dental restorative materials. dental plaque formation on teeth and restorative materials plays an important role in the pathogenesis of oral diseases. this study investigates initial adhesion of stationary phase streptococcal species to different all-ceramics dental restorative materials. the saliva-coated materials were incubated with the bacteria for 1 h in an in vitro fl ... | 2008 | 18470704 |
| [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 |
| [initial study on the discrimination of oral microorganisms with a metabonomics method]. | to establish the spectra of metabolites that coued be employed in identification of oral pathogenic bacteria, and try to find a convenient and rapid way to discriminate oral microorganisms. | 2008 | 19007080 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| comparative study of the antimicrobial efficacy of chlorhexidine gel, chlorhexidine solution and sodium hypochlorite as endodontic irrigants. | the purpose of this study was to assess the in vitro the antimicrobial efficacy of chlorhexidine gluconate gel as an endodontic auxiliary chemical substance compared to sodium hypochlorite (naocl) and chlorhexidine gluconate solution. the antimicrobial efficacy of the tested substances was evaluated using the agar diffusion test. the growth inhibition zones produced by 0.2%, 1% and 2% chlorhexidine gel were evaluated against 5 facultative anaerobic bacteria and 4 pigmented gram-negative anaerobe ... | 2007 | 18278298 |
| [effects of traditional chinese medicine on oral bacteria biofilm]. | to investigate the effects of compounds of galla chinensis extract (gce) and nidus vespae extract-1 (wve1) on oral bacteria biofilm structure and activity and to determine the possibility of caries prevention by the compounds. | 2007 | 18215362 |
| decontamination effects of low-temperature plasma generated by corona discharge. part ii: new insights. | the second part of our paper presents the results of experiments with the decontamination of surfaces by low-temperature plasma generated by corona discharge in air at atmospheric pressure. a simple device is described and the effects of the corona discharge on model microorganisms, viz. the yeast candida albicans, gram-negative bacteria escherichia coli, enterobacter aerogenes, neisseria sicca, stenotrophomonas maltophilia, gram-positive bacteria deinococcus radiodurans, enterococcus faecium, s ... | 2007 | 18225640 |
| infective endocarditis during pregnancy: case report. | a 29-year-old woman was transferred at 31 weeks gestation for management of infective endocarditis (ie). echocardiography demonstrated vegetations on aortic valve and severe mitral regurgitation. blood cultures were positive for streptococcus sanguis. due to impending hemodynamic collapse, a cesarean section was performed followed by aortic valve replacement and mitral valve repair with a patch of bovine pericardium. at 10-month review, both mother and baby are doing well. | 2007 | 18187383 |
| sensitivity of oral bacteria to 254 nm ultraviolet light. | to explore the sensitivity of bacteria commonly found in root canals to 254 nm ultraviolet (uv) light, either as individual cells or as participants of a bacterial multilayer. | 2007 | 17229117 |
| the effect of mango and neem extract on four organisms causing dental caries: streptococcus mutans, streptococcus salivavius, streptococcus mitis, and streptococcus sanguis: an in vitro study. | chewing twigs of the mango or neem tree is a common way of cleaning the teeth in the rural and semi-urban population. these twigs are also believed to possess medicinal properties. the present study was conducted to evaluate the antimicrobial effects of these chewing sticks on the microorganisms streptococcus mutans , streptococcus salivarius , streptococcus mitis , and streptococcus sanguis which are involved in the development of dental caries. an additional objective was to identify an inexpe ... | 2007 | 17938488 |
| innate immune responses of gingival epithelial cells to nonperiodontopathic and periodontopathic bacteria. | we have previously reported different susceptibilities of periodontopathic and nonperiodontopathic bacteria to antimicrobial peptides and phagocytosis by neutrophils. differences between the two groups of bacteria may exist also in their ability to induce immune responses from the host. therefore, we evaluated the effects of various oral bacteria on innate immune responses by gingival epithelial cells. | 2007 | 17956462 |
| guiding periodontal pocket recolonization: a proof of concept. | the complexity of the periodontal microbiota resembles that of the gastro-intestinal tract, where infectious diseases are treatable via probiotics. in the oropharyngeal region, probiotic or replacement therapies have shown some benefit in the prevention of dental caries, otitis media, and pharyngitis, but their effectiveness in the treatment of periodontitis is unknown. therefore, this study addressed the hypothesis that the application of selected beneficial bacteria, as an adjunct to scaling a ... | 2007 | 17959900 |
| adhesion of streptococcus mutans to different types of brackets. | to examine the difference in the adhesion of streptococcus mutans to three different types of orthodontic brackets and the effect of the presence of an early salivary pellicle and streptococcus sanguis on adhesion. | 2007 | 18004916 |
| review. leukocyte and endothelial cell adhesion molecules in inflammation focusing on inflammatory heart disease. | in multicellular organisms the development of adhesion bonds, either among cells or among cells and components of the extracellular matrix, is a crucial process. these interactions are mediated by molecules which are named adhesion molecules and play a main role both at the early stages of the development of tissue integrity and later. cell adhesion molecules (cams) have a key role in several pathologies such as cancer and inflammatory diseases. selectins, integrins and immunoglobulin gene super ... | 2007 | 18019409 |
| raman spectroscopic measurement of relative concentrations in mixtures of oral bacteria. | near-infrared raman spectroscopy has been used for species identification of pure microbial specimens for more than a decade. more recently, this optical method has been extended to the analysis of specimens containing multiple species. in this report, we demonstrate rapid, reagent-free quantitative analysis of a simplified model of oral plaque containing three oral bacteria species, s. mutans, s. sanguis, and s. gordonii, using near-infrared raman spectroscopy. raman spectra were acquired from ... | 2007 | 18028703 |
| a role for von willebrand factor in streptococcus sanguis-induced platelet activation. | 2007 | 18064343 | |
| antibacterial activity of triterpene acids and semi-synthetic derivatives against oral pathogens. | triterpene acids (ursolic, oleanoic, gypsogenic, and sumaresinolic acids) isolated from miconia species, along with a mixture of ursolic and oleanolic acids and a mixture of maslinic and 2-a-hydroxyursolic acids, as well as ursolic acid derivatives were evaluated against the following microorganisms: streptococcus mutans, streptococcus mitis, streptococcus sanguinis, streptococcus salivarius, streptococcus sobrinus, and enterococcus faecalis, which are potentially responsible for the formation o ... | 2007 | 18069238 |
| antimicrobial activity of mahonia aquifolium and two of its alkaloids against oral bacteria. | extracts or alkaloids isolated from mahonia aquifolium exhibit antimicrobial activity against gram-positive and gram-negative bacteria, fungi, and protozoa. in this study the bacteriostatic and bacteriocidal activities of a m. aquifolium extract and two of its major alkaloids, berberine chloride and oxyacanthine sulphate, were tested in vitro against nine different oral bacteria. minimum inhibitory concentrations were in the range from < or = 0.0031% to 0.1993% for the m. aquifolium extract, fro ... | 2007 | 18072463 |
| microcalorimetry: a novel method for detection of microbial contamination in platelet products. | measuring heat from replicating microorganisms in culture may be a rapid, accurate, and simple screening method for platelets (plts). microcalorimetry for detection of microorganisms in in vitro contaminated plt products was evaluated. | 2007 | 17725729 |
| differential roles of individual domains in selection of secretion route of a streptococcus parasanguinis serine-rich adhesin, fap1. | fimbria-associated protein 1 (fap1) is a high-molecular-mass glycosylated surface adhesin required for fimbria biogenesis and biofilm formation in streptococcus parasanguinis. the secretion of mature fap1 is dependent on the presence of seca2, a protein with some homology to, but with a different role from, seca. the signals that direct the secretion of fap1 to the seca2-dependent secretion pathway rather than the seca-dependent secretion pathway have not yet been identified. in this study, fap1 ... | 2007 | 17766425 |
| demonstration of in vivo transfer of doxycycline resistance mediated by a novel transposon. | the aim of this study was to investigate the transfer of bacterial doxycycline resistance between oral bacteria in subjects receiving systemic doxycycline for the treatment of periodontitis. | 2007 | 17855723 |
| plaque ph response to snack foods in children with different levels of mutans streptococci. | this study aimed to investigate the effects of some snack foods on plaque ph in children with different levels of mutans streptococci (ms). six children, aged 9-12 years, with low (<10(4)) and 6 children, aged 10-12 years, with high (>106) numbers of ms/ml saliva participated in the study. dental plaque ph changes, after the consumption of milk chocolate, sweet biscuit, instant noodle, sticky rice with banana and a 10% sucrose positive control were measured using ph-electrode. the measurements o ... | 2007 | 17877240 |
| in vitro inhibition of oral streptococci binding to the acquired pellicle by algal lectins. | the initial colonization of the tooth by streptococci involves their attachment to adsorbed components of the acquired pellicle. avoiding this adhesion may be successful in preventing caries at early stages. salivary mucins are glycoproteins that when absorbed onto hydroxyapatite may provide binding sites for certain bacteria. algal lectins may be especially interesting for oral antiadhesion trials because of their great stability and high specificity for mucins. this work aimed to evaluate the ... | 2007 | 17897204 |
| infective endocarditis and dentistry: the legal basis for an association. | the objectives of this study were to determine on what evidence infective endocarditis (ie) could be legally linked to dental treatment. | 2007 | 17273180 |
| streptococcus gordonii hsa environmentally constrains competitive binding by streptococcus sanguinis to saliva-coated hydroxyapatite. | competition between pioneer colonizing bacteria may determine polymicrobial succession during dental plaque development, but the ecological constraints are poorly understood. for example, more streptococcus sanguinis than streptococcus gordonii organisms are consistently isolated from the same intraoral sites, yet s. gordonii fails to be excluded and survives as a species over time. to explain this observation, we hypothesized that s. gordonii could compete with s. sanguinis to adhere to saliva- ... | 2007 | 17277052 |
| genome of the opportunistic pathogen streptococcus sanguinis. | the genome of streptococcus sanguinis is a circular dna molecule consisting of 2,388,435 bp and is 177 to 590 kb larger than the other 21 streptococcal genomes that have been sequenced. the g+c content of the s. sanguinis genome is 43.4%, which is considerably higher than the g+c contents of other streptococci. the genome encodes 2,274 predicted proteins, 61 trnas, and four rrna operons. a 70-kb region encoding pathways for vitamin b(12) biosynthesis and degradation of ethanolamine and propanedi ... | 2007 | 17277061 |
| tigecycline (gar-936) activity against streptococcus gallolyticus (bovis) and viridans group streptococci. | viridans group streptococci including streptococcus gallolyticus (formerly s. bovis) represent serious invasive pathogens often associated with endocarditis or sepsis among immunocompromised or cancer patients. tigecycline (gar-936), the first clinically studied glycylcycline, has a potent gram-positive activity with a potential treatment option for these streptococcal infections. the studied collection (848 strains) included 100 isolates each of streptococcus anginosus, streptococcus constellat ... | 2007 | 16989974 |
| the microbiological profiles of saliva, supragingival and subgingival plaque and dental caries in adults with and without type 2 diabetes mellitus. | the relationships between suspected bacteria in saliva, yeasts in oral rinse, and supragingival and subgingival plaque versus root surface and coronal caries in adults with type 2 diabetes mellitus and a non-diabetic group were explored. | 2007 | 17488443 |
| identification of a novel streptococcal gene cassette mediating sos mutagenesis in streptococcus uberis. | streptococci have been considered to lack the classical sos response, defined by increased mutation after uv exposure and regulation by lexa. here we report the identification of a potential self-regulated sos mutagenesis gene cassette in the streptococcaceae family. exposure to uv light was found to increase mutations to antibiotic resistance in streptococcus uberis cultures. the mutational spectra revealed mainly g:c-->a:t transitions, and northern analyses demonstrated increased expression of ... | 2007 | 17513475 |
| development of species-specific primers for detection of streptococcus mutans in mixed bacterial samples. | streptococcus mutans is the major microbial pathogen associated with dental caries in children. the objectives of this study were to design and evaluate species-specific primers for the identification of s. mutans. validation of the best primer set, sm479f/r, was performed using seven s. mutans reference strains, 48 atcc non-s. mutans strains, 92 s. mutans clinical isolates, dna samples of s. mutans-streptococcus sobrinus or s. mutans-streptococcus sanguinis, and mixed bacterial dna of saliva sa ... | 2007 | 17521362 |
| native triple-valve endocarditis caused by penicillin-resistant streptococcus sanguis. | a 26-year-old man with known but untreated ventricular septal defect was admitted to the emergency ward with abdominal pain, fever and weight loss. transthoracic echocardiography showed multiple vegetations on the anterior mitral leaflet, a mobile vegetation on the surface of the aortic noncoronary cusp and another on the tricuspid valve. his blood cultures grew streptococcus sanguis with a penicillin minimum inhibitory concentration of 3 microg/ml. | 2007 | 17522723 |
| odontogenic bacteria in periodontal disease and resistance patterns to common antibiotics used as treatment and prophylaxis in odontology in spain. | resistance in streptococci or gram-negative bacteria is associated with antibiotic consumption. scarce information exists on the antibiotic susceptibility of bacterial isolates from patients with periodontitis in countries with high antibiotic consumption, as this is an area in which microbiological testing is not performed in daily practice. the present study was undertaken to explore the susceptibility of bacterial isolates in periodontitis to antibiotics prescribed in odontology in spain as t ... | 2007 | 17530037 |
| bacterial species in subgingival plaque and oral bone loss in postmenopausal women. | oral bacteria are widely recognized in the etiology of periodontal disease. we investigated the prevalence of subgingival bacterial infection with eight species, tested associations between infection and oral bone loss, and assessed potential confounding factors and effect modifiers of those associations in a large community-based cohort of postmenopausal women. | 2007 | 17539719 |
| pro-inflammatory cellular immune response in behçet's disease. | several proteins are investigated as candidate auto-antigens in the pathogenesis of behçet's disease (bd). this study aimed to screen the cellular responses to auto-antigen (alphab-crystallin, alphabc), and microorganism (streptococcus sangius kth-1 bes-1 protein) derived peptides as well as to isopentenyl pyrophosphate (ipp). peripheral blood mononuclear cells (pbmc) from 22 bd patients and 22 healthy controls (hc) were stimulated in vitro with alphabc, bes-1 peptides, ipp and ppd and induced p ... | 2007 | 17549482 |
| production of antagonistic substance by eikenella corrodens isolated from the oral cavity of human beings with and without periodontal disease. | antagonistic abilities may confer ecological advantages for micro-organisms in competitive ecosystems. however, reports regarding this phenomenon in eikenella corrodens are not available. | 2007 | 17584471 |
| bacteria interfere with a. actinomycetemcomitans colonization. | it is known that beneficial bacteria can suppress the emergence of pathogenic bacteria, particularly in the gastrointestinal tract. this study examined the potential for a similar suppression of aggregatibacter (formerly actinobacillus) actinomycetemcomitans colonization of epithelial cells, due to its potential relevance in periodontal diseases. seven presumed beneficial bacteria were examined for their ability to interfere, exclude, or displace a. actinomycetemcomitans from epithelial cells in ... | 2007 | 17586706 |
| [effects of the active compounds of m. officinalis on cariogenic bacteria]. | to investigate the effects of the principal biologically active compounds of m. officinalis on the growth and acid generation of the main cariogenic bacteria. | 2007 | 17593830 |
| in vitro antimicrobial activity of peroxide-based bleaching agents. | antibacterial activity of 4 commercial bleaching agents (day white, colgate platinum, whiteness 10% and 16%) on 6 oral pathogens (streptococcus mutans, streptococcus sobrinus, streptococcus sanguinis, candida albicans, lactobacillus casei, and lactobacillus acidophilus) and staphylococcus aureus were evaluated. a chlorhexidine solution was used as a positive control, while distilled water was the negative control. bleaching agents and control materials were inserted in sterilized stainless-steel ... | 2007 | 17625621 |
| inhibition of bacterial adherence to saliva-coated through plant lectins. | in the present study, we evaluated the ability of lectin from talisia esculenta (tel) and a protein from labramia bojeri seeds (labramin) to inhibit adherence of microorganisms and exert antimicrobial effects. the minimum inhibitory and bactericidal concentrations of these proteins were determined using 5 species of bacteria: streptococcus mutans ua159, streptococcus sobrinus 6715, streptococcus sanguinis atcc10556, streptococcus mitis atcc903 and streptococcus oralis pb182. in addition, an adhe ... | 2007 | 17634727 |
| determination of the bactericidal activity of different calcium hydroxide presentations on a dentin model. | calcium hydroxide placed as a temporary dressing in the root canal helps sterilize infected canals. hycal and roeko calcium hydroxide points are two delayed-action medications containing ca(oh)2 recommended for root canal treatment. the purpose of this study was to test their bactericidal activity in comparison with that of c-pmcp on streptococcus sanguins strain nctc 7823. artificially infected 4-mm high blocks of dentin obtained from bovine incisors were used as an experimental model (n = 192) ... | 2007 | 17654882 |
| adhesion of streptococcus sanguinis to dental implant and restorative materials in vitro. | bacterial adhesion to tooth surfaces or dental materials starts immediately upon exposure to the oral environment. the aim of this study, therefore, was to compare the adhesion of streptococcus sanguinis to saliva-coated human enamel and dental materials - during a one-hour period - using an in vitro flow chamber system which mimicked the oral cavity. after fluorescent staining, the number of adhered cells and their vitality were recorded. the dental materials used were: titanium (rematitan m), ... | 2007 | 17694745 |
| multiparameter assessments to determine the effects of sugars and antimicrobials on a polymicrobial oral biofilm. | clinical studies indicate relationships between dental plaque, a naturally formed biofilm, and oral diseases. the crucial role of nonmicrobial biofilm constituents in maintaining biofilm structure and biofilm-specific attributes, such as resistance to shear and viscoelasticity, is increasingly recognized. concurrent analyses of the diverse nonmicrobial biofilm components for multiparameter assessments formed the focus of this investigation. comparable numbers of actinomyces viscosus, streptococc ... | 2006 | 17021225 |
| role of streptococcus sanguinis sortase a in bacterial colonization. | streptococcus sanguinis, a normal inhabitant of the human oral cavity, has low cariogenicity, though colonization on tooth surfaces by this bacterium initiates aggregation by other oral bacteria and maturation of dental plaque. additionally, s. sanguinis is frequently isolated from infective endocarditis patients. we investigated the functions of sortase a (srta), which cleaves lpxtg-containing proteins and anchors them to the bacterial cell wall, as a possible virulence factor of s. sanguinis. ... | 2006 | 17045503 |
| antibacterial effect of two mineral trioxide aggregate (mta) preparations against enterococcus faecalis and streptococcus sanguis in vitro. | the antibacterial effects of gray-colored mta (gmta) and white-colored mta (wmta) against enterococcus faecalis and streptococcus sanguis were assessed in vitro using the tube dilution test. broth tubes were prepared and divided into experimental and control groups. aliquots of each of the tested microorganisms were taken from a stock culture and added to each experimental and positive control group. all groups were incubated at 37 degrees c and evaluated for turbidity at 0, 1, 24, 48, and 72-ho ... | 2006 | 17055905 |
| relationship between the ability of oral streptococci to interact with platelet glycoprotein ibalpha and with the salivary low-molecular-weight mucin, mg2. | the oral streptococci streptococcus sanguinis, streptococcus gordonii and streptococcus oralis are common aetiological agents of infective endocarditis, and their ability to adhere to and induce the aggregation of platelets is thought to be a virulence trait. the platelet glycoprotein gpibalpha has been implicated as the adhesion receptor for s. sanguinis and s. gordonii, but it is not known if this is the case for s. oralis and other species. the aim of this study was to determine the gpibalpha ... | 2006 | 17069618 |
| bacterial diversity in aortic aneurysms determined by 16s ribosomal rna gene analysis. | aortic aneurysms are common vascular conditions that cause considerable morbidity and mortality. understanding of the mechanisms involved in the pathogenesis of the condition remains limited. recently, infection has been suggested as possible contributor in the development of the disease. the aim of the present study was to examine aortic aneurysms for the presence of bacterial dna using polymerase chain reaction (pcr) targeting the 16s ribosomal rna (rrna) gene, followed by cloning and sequenci ... | 2006 | 17098542 |
| [chronic intramedullary abscess (streptococcus sanguis). a case report and review of the literature]. | chronic intramedullary spinal cord abscesses are very rare. we present here a new case of this pathology, revealed by a progressive spinal cord compression. this case is particular because of the long follow up before surgery (two years). | 2006 | 17203904 |
| bacterial profile and burden of periodontal infection in subjects with a diagnosis of acute coronary syndrome. | periodontitis has been identified as a potential risk factor in cardiovascular diseases. it is possible that the stimulation of host responses to oral infections may result in vascular damage and the inducement of blood clotting. the aim of this study was to assess the role of periodontal infection and bacterial burden as an explanatory variable to the activation of the inflammatory process leading to acute coronary syndrome (acs). | 2006 | 16805672 |
| simultaneous valve replacement and venous patch repair of superior mesenteric artery aneurysm due to infective endocarditis: a case report. | peripheral mycotic aneurysm development is a rare systemic complication of infective endocarditis. | 2006 | 16809126 |
| the effect of piper betle and psidium guajava extracts on the cell-surface hydrophobicity of selected early settlers of dental plaque. | the adhesion of early settlers of dental plaque to the tooth surface has a role in the initiation of the development of dental plaque. the hydrophobic surface properties of the bacteria cell wall are indirectly responsible for the adhesion of the bacteria cell to the acquired pellicle on the tooth surfaces. in this study, the effect of aqueous extract of two plants (psidium guajava and piper betle) on the cell-surface hydro-phobicity of early settlers of dental plaque was determined in vitro. he ... | 2006 | 16858135 |
| regarding neutrophil and lymphocyte responses to oral streptococcus in adamantiades-behçet's disease. | 2006 | 16872367 | |
| effect of three nickel-titanium rotary file techniques on infected root dentin reduction. | this study compared the bacterial reduction of in vitro infected root canals after instrumentation by 3 nickel-titanium (niti) rotary files with different taper and diameter versus manual stainless steel files. | 2006 | 16876071 |
| giant periprosthetic vegetation associated with pseudoaneurysmal-like rupture. | 2006 | 16569654 | |
| garenoxacin treatment of experimental endocarditis caused by viridans group streptococci. | the activity of garenoxacin was compared to that of levofloxacin or penicillin in a rabbit model of streptococcus mitis group (penicillin mic, 0.125 microg/ml) and streptococcus sanguinis group (penicillin mic, 0.25 microg/ml) endocarditis. garenoxacin and levofloxacin had mics of 0.125 and 0.5 microg/ml, respectively, for both study isolates. rabbits with catheter-induced aortic valve endocarditis were given no treatment, penicillin at 1.2x10(6) iu/8 h intramuscularly, garenoxacin at 20 mg/kg o ... | 2006 | 16569838 |
| identification of oral bacteria associated with crevicular epithelial cells from chronic periodontitis lesions. | bacterial invasion of host epithelial cells plays an important role in the pathogenesis of periodontal diseases; however, the interactions between subgingival species and the gingival crevice cells are not fully understood. this study determined the prevalence of a group of oral bacterial species on or in epithelial cells derived from periodontal pockets and the gingival crevice of subjects with periodontitis. samples of epithelial cells were obtained from 120 sites with periodontal pockets > or ... | 2006 | 16585650 |
| human t-cell responses to oral streptococci in human pbmc-nod/scid mice. | we investigated cellular and humoral immune responses to oral biofilm bacteria, including streptococcus mutans, streptococcus anginosus, streptococcus sobrinus, and streptococcus sanguinis, in nod/scid mice immunized with human peripheral blood mononuclear cells (hu-pbmc-nod/scid mice) to explore the pathogenicity of each of those organisms in dental and oral inflammatory diseases. hu-pbmc-nod/scid mice were immunized by intraperitoneal injections with the whole cells of the streptococci once a ... | 2006 | 16626374 |
| streptococcus massiliensis sp. nov., isolated from a patient blood culture. | an unidentified strain of the viridans group of streptococci was isolated from a human blood sample. it was distinguished from all other recognized species of the streptococcus sanguinis group by several biochemical characteristics. phylogenetic analysis based on 16s rrna gene sequence comparisons clustered this strain with streptococcus ferus (mutans group) but phylogenetic analysis based on rpob and soda gene sequence comparisons included it in the s. sanguinis group. the isolate showed 95.4 a ... | 2006 | 16627666 |
| in vitro antibacterial efficacy of a new chlorhexidine slow-release device. | the aim of this study was to evaluate and compare the antibacterial effect of chlorhexidine and calcium hydroxide slow-release devices on oral bacteria. | 2006 | 16683687 |
| antibacterial activity of glass-ionomer restorative cements and polyacid modified composite resin against cariogenic bacteria. | 2006 | 16687876 |