Publications
| Title | Abstract | Year(sorted ascending) Filter | PMID Filter |
|---|
| sinusitis of dental origin. | acute or chronic sinusitis may be odontogenic. bacteria involved in odontogenic sinusitis are specific organisms associated with the teeth (streptococcus sanguis, streptococcus salivarius, streptococcus mutans, anaerobic germs). they are often secondary to an intrasinus foreign body following periodontitis. the treatment is both naso-sinusal and dental. cysts of the maxilla can also invade the sinus. in particular, radiculo-dental cysts (periapical) must be surgically excised, in some cases asso ... | 1997 | 9444378 |
| coronal leakage of obturated root canals after long-term storage using a polymicrobial marker. | this in vitro study investigated the effect of long-term storage on the coronal leakage of a microbial marker on teeth root filled with lateral condensation of cold gutta-percha and one of two sealers. sixty single-rooted teeth were prepared chemomechanically to a size 40 master apical file. the teeth were divided into two groups of 20 teeth each and obturated with gutta-percha using either apexit or tubliseal ewt sealer. the teeth were stored for 6 months in artificial saliva and tested for lea ... | 1997 | 9587271 |
| a microbiological study of pre- and postoperative apicoectomy sites. | there is little information on the microbiology of periapical lesions, and no data on the residual microbial flora in the periapex, if any, after apicoectomy procedures. hence, 64 patients treated by apicoectomy procedures were prospectively studied to assess the bacterial flora in the periapex and to evaluate the residual bacteria in postoperative apicoectomy sites. of the 64 lesions studied, 14 (22%) were sterile and 50 (78%) yielded bacteria preoperatively. bacteria could be recovered from 28 ... | 1997 | 9552822 |
| the role of an uncommon type of oral streptococcus sanguis in the etiology of behcet's disease. | the relationships of behcet's disease (bd) with oral diseases and the prevalence of an uncommon type of oralstreptococcus sanguis (str. sanguis) in the oral cavity were investigated in a case-control study. bd patients were compared to patient controls (collagen disease) and healthy controls.an interview questionnaire survey of bd and oral diseases showed that during the pre-onset, onset, and post-onset periods, the incidences of tonsillitis and dental caries, or the history of dental treatment, ... | 1997 | 21432453 |
| the role of platelets in infective endocarditis. | there is growing evidence that platelets play an important role in the development of infective endocarditis (ie). this review focuses on interactions between bacteria and platelets. many types of microorganism are capable of causing endocarditis. the oral streptococci, particularly streptococcus sanguis and s. oralis, remain the most common causative bacteria in ie but staphylococcus aureus is becoming an increasingly important agent. several species of bacteria and fungi are able to cause plat ... | 1997 | 16793661 |
| ribotyping of bacteria from root canal and blood of patients receiving endodontic therapy. | dna restriction patterns and corresponding ribotypes of 26 bacterial isolates (propionibacterium acnes, peptostreptococcus prevotii, fusobacterium nucleatum, prevotella intermedia, prevotella nigrescens, actinomyces israelii, streptococcus intermedius, and streptococcus sanguis) recovered from patients with infected root canals and their peripheral blood, collected during and after endodontic therapy, were examined. eleven additional reference strains including type strains were also examined. p ... | 1997 | 16887597 |
| extraction, assay, and analysis of antimicrobials from plants with activity against dental pathogens (streptococcus sp.) | many dental and periodontal diseases are largely a question of bacterial etiology. dental caries develop due to an increase of strongly acidogenic and aciduric gram-positive bacteria while common forms of periodontal disease are linked to anaerobic gram-negative bacteria in subgingival plaque. many plants and plant-derived antimicrobial components are used in folklore therapeutics for the treatment of periodontal disorders and for the purposes of oral hygiene. some have been evaluated for possib ... | 1998 | 9553834 |
| [aortic valvular vegetation in annuloaortic ectasia due to idiopathic cystic medial necrosis: a case report]. | annuloaortic ectasia is often accompanied by marfan syndrome and associated with infective endocarditis usually involving the mitral valves. we treated a patient with annuloaortic ectasia due to idiopathic cystic medial necrosis who developed congestive heart failure with aortic valvular vegetation. a 56-year-old man had dyspnea on effort since the beginning of january, 1997 and was admitted to our hospital on april 6, 1997 because of orthopnea. the diagnosis was congestive heart failure due to ... | 1998 | 9864690 |
| purification and properties of a bacteriocin of staphylococcus epidermidis isolated from dental plaque. | an extracellular bacteriocin of staphylococcus epidermidis isolated from dental plaque was purified and characterized. its molecular mass was 3500 da and pi was 10.5. this bacteriocin inhibited the growth of staphylococcus aureus, streptococcus salivarius, and streptococcus mitis, but streptococcus mutans, streptococcus sanguis and other oral indigenous bacterial species examined were not inhibited. the mode of inhibition was found to be bacteriostatic. | 1998 | 9872117 |
| structures of biologically active muramyl peptides from peptidoglycan of streptococcus sanguis. | the structures of major muramyl peptides derived from peptidoglycan of the oral pathogen streptococcus sanguis were determined and the biological activity of the peptides was tested in vitro on human monocytes. the muramyl peptides, produced by muramidase digestion of the purified peptidoglycan, were separated by reversed-phase high-performance liquid chromatography, either in their native form or after reduction with sodium borohydride. chemical structures of the peptides were elucidated by a c ... | 1998 | 9875522 |
| bactericidal efficacy of carbon dioxide laser against bacteria-contaminated titanium implant and subsequent cellular adhesion to irradiated area. | the aim of this study was to assess co2 laser ability to eliminate bacteria from titanium implant surfaces. the changes of the surface structure, the rise in temperature, and the damage of connective tissue cells after laser irradiation were also considered. | 1998 | 9888326 |
| influence of different vehicles on the antibacterial effects of calcium hydroxide. | this study evaluated the influence of three different vehicles on the antibacterial activity of calcium hydroxide against four bacterial species commonly found in endodontic infections. for this purpose, a broth dilution test using 24-well cell culture plates was performed. results showed that all pastes were effective in killing the bacteria tested, but at different times. the calcium hydroxide/camphorated paramonochlorophenol/glycerin paste was the most effective against the four bacterial str ... | 1998 | 10023249 |
| turning on and turning off the arginine deiminase system in oral streptococci. | the arginine deiminase system in oral streptococci is highly regulated. it requires induction and is repressed by catabolites such as glucose or by aeration. a comparative study of regulation of the system in streptococcus gordonii atcc 10558, streptococcus rattus fa-1, and streptococcus sanguis nctc 10904 showed an increase in activity of the system in s. sanguis of some 1467-fold associated with induction-depression of cells previously uninduced-repressed. the activity of the system was assaye ... | 1998 | 10030002 |
| pacemaker-related endocarditis. report of 7 cases and review of the literature. | we report on 7 patients with pacemaker endocarditis diagnosed during the workup of long-standing fever. persistent positive blood cultures and echocardiography led to the diagnosis in 6 patients whereas autopsy was diagnostic in another. causative microorganisms were staphylococcus epidermidis (3), staphylococcus lugdunensis (1), pseudomonas aeruginosa (1), streptococcus bovis (1), and streptococcus mitis-streptococcus sanguis (1). pulmonary embolism was present in nearly 50% of the cases, a fig ... | 1998 | 10085483 |
| effect of low-molecular-weight chitosans on the adhesive properties of oral streptococci. | it was previously shown that a low-molecular-weight chitosan and its derivatives n-carboxymethyl chitosan and imidazolyl chitosan inhibit streptococcus mutans adsorption to hydroxyapatite. the ability of the same molecules to interfere with adhesive properties of other oral streptococci (streptococcus sanguis, streptococcus gordonii, streptococcus constellatus, streptococcus anginosus, streptococcus intermedius, streptococcus oralis, streptococcus salivarius, streptococcus vestibularis) was test ... | 1998 | 10093536 |
| cutaneous vasculitis and collapse. | 1998 | 10197203 | |
| mutacin production by streptococcus mutans may promote transmission of bacteria from mother to child. | the production of bacteriocin-like inhibitory substances, mutacins, by mutans streptococci varies among isolates. to find if the degree of mutacin activity of an isolate was related to its transmission between mother and her child, 19 mothers and their 18-month- to 3-year-old children were sampled for their oral mutans streptococci. in addition, the stability of mutacin activity was studied with isolates from the mothers and with isolates from five unrelated 5-year-old children in 5- to 7-year f ... | 1998 | 9596721 |
| development of a novel in vitro co-culture system for studying host response to native bacterial antigens. | we have developed a novel co-culture system in which murine splenocytes are cultured with live bacteria in the presence of a bacteriostatic antibiotic. superantigens, like staphylococcal enterotoxin b (seb) are important factors in bacterial pathogenicity. research has shown that superantigens affect numerous immune cell types, either directly or indirectly, yet their involvement in pathogenic mechanisms remains poorly defined. in these studies, we utilize the co-culture system to study how supe ... | 1998 | 9617839 |
| [mycotic aneurysm in endocarditis lenta as the etiology of intraparenchymatous cerebral hemorrhage]. | case report: a 49-year-old male was admitted for left-side headache and mild speech defect. clinical examination showed a pansystolic murmur of mitral regurgitation and mild wernicke aphasia. in laboratory studies esr and crp were increased. computed tomography of brain revealed a left temporoparietal hematoma. echocardiographic examination demonstrated vegetations and mitral valve perforation. in blood cultures grew alpha-streptococci. cerebral angiography was performed and a fusiform aneurysm ... | 1998 | 9630815 |
| cloning and sequencing of bes-1 gene encoding the immunogenic antigen of streptococcus sanguis kth-1 isolated from the patients with behçet's disease. | in order to analyze the immunopathologic mechanisms of behçet's disease, the gene (bes-1) encoding a streptococcal antigen correlated with the disease was cloned and sequenced, and protein produced by this clone was identified by western immunoblotting using serum antibody from the patient. cellular dna of streptococcus (s.) sanguis serotype kth-1 (uncommon serotype 1, strain 113-20) from the patient was extracted and digested with ecori. the digested fragments were cloned into the cloning vecto ... | 1998 | 9638874 |
| binaphthalenone glycosides from african chewing sticks, diospyros lycioides. | our laboratory has engaged in the exploration of active antimicrobial principles present in chewing sticks commonly used by the african and middle eastern countries as a mechanical oral hygiene aid in place of tooth brushing. during this investigation, a methanol extract from the twigs of diospyros lycioides, a namibia tooth cleaning stick, demonstrated antimicrobial activity against common oral pathogens including streptococcus mutans and porphyromonas gingivalis (mics 2.5 and 0.156 mg/ml). sub ... | 1998 | 9644074 |
| subgingival microbiota in healthy, well-maintained elder and periodontitis subjects. | this investigation compared the site prevalence of 40 subgingival species in 30 periodontally healthy (mean age 36+/-9 years), 35 elders with a well-maintained periodontium (mean age 77+/-5) and 138 adult periodontitis subjects (mean age 46+/-11). subgingival plaque samples were taken from the mesial aspect of each tooth (up to 28 samples) in the 203 subjects at baseline. the presence and levels of 40 subgingival taxa were determined in 5003 plaque samples using whole genomic dna probes and chec ... | 1998 | 9650869 |
| streptococcal bacteremia and colorectal cancer. | 1998 | 9671848 | |
| antibacterial effects of a bioactive glass paste on oral microorganisms. | bioactive glasses contain oxides of calcium, sodium, phosphorus, and silicon in a proportion that provides the material with surface activity and concomitantly with the property of forming a strong bond with bone. bioactive glasses have been tested as bone substitutes in different clinical situations. in an aqueous environment, ca2+, na+, po4(3-) , and si4+ are released from the glass, resulting in a rise in ph and in osmotic pressure in its vicinity. since these are factors that potentially inf ... | 1998 | 9688225 |
| antimicrobial activity produced by six dentifrices. | the antimicrobial activity of six commercially available dentifrices and positive and negative controls as they come into contact with streptococcus mutans, s. sanguis, and actinomyces viscosus commonly found in the oral cavity. sterile discs treated with the dentifrices were placed on agar plates with the controls. zones of microbial inhibition were measured in millimeters after 48 hours. all of the test dentifrices demonstrated antimicrobial activity against the bacteria. | 1998 | 9693543 |
| detection of bacteraemia in patients with fever and neutropenia using 16s rrna gene amplification by polymerase chain reaction. | episodes of fever and neutropenia are common complications of treatment for cancer. the use of prophylactic and early empirical antibiotics has reduced mortality but decreases the sensitivity of diagnostic tests based on culture. the aim of this study was to determine the potential of a broad diagnostic approach (eubacterial) based on 16s rrna gene amplification and sequencing to augment cultural methods of diagnosis of bacteraemia in patients with fever and neutropenia in a regional paediatric ... | 1998 | 9707307 |
| in vitro studies of the effect of antiseptic-containing mouthwashes on the formation and viability of streptococcus sanguis biofilms. | the aims of this study were to evaluate the growth of streptococcus sanguis on hydroxyapatite, bovine enamel and polytetrafluoroethylene substrata in a constant depth film fermentor, and to determine the effects of three antimicrobial-containing mouthwashes on biofilm formation and bacterial viability on hydroxyapatite and enamel. there was little difference in the final cell density (5 x 10(4) cfu mm-2) of the strep. sanguis biofilm on the three substrata. when hydroxyapatite-grown biofilms wer ... | 1998 | 9717301 |
| antibacterial temporary filling materials: the effect of adding various ratios of ag-zn-zeolite. | the effect of a new type of antibacterial temporary filling material was evaluated. ag-zn-zeolite (bactekiller, kanebo, japan) and sio2 filler were incorporated into urethane acrylate monomer paste in amounts of 5/55, 10/50, 20/40 and 30/30 wt%, respectively. the present study was designed to use a dye penetration test to measure direct inhibition of bacterial growth of four oral bacteria (streptococcus mutans, streptococcus mitis, streptococcus salivarius, streptococcus sanguis). the amounts of ... | 1998 | 9722093 |
| dental plaque, platelets, and cardiovascular diseases. | cardiovascular diseases, including atherosclerosis and myocardial ischemia, occur as a result of a complex set of genetic and environmental factors. during periodontitis, dental plaque microorganisms may disseminate through the blood to infect the vascular endothelium and contribute to the occurrence of atherosclerosis and risk of myocardial ischemia and infarction. myocardial ischemia and infarction are often preceded by acute thromboembolic events. in an in vitro model of thrombosis, certain d ... | 1998 | 9722699 |
| influence of growth mode and sucrose on susceptibility of streptococcus sanguis to amine fluorides and amine fluoride-inorganic fluoride combinations. | this study evaluated the susceptibility to amine fluorides (amfs) of planktonic and biofilm cultures of streptococcus sanguis grown with and without sucrose. cultures were incubated with amfs (250 mg of fluoride liter-1) for 1 min. the susceptibility of biofilms was less than that of the planktonic form and was further decreased by growth in the presence of sucrose. | 1998 | 9726905 |
| composition of pellicles formed in vivo on tooth surfaces in different parts of the dentition, and in vitro on hydroxyapatite. | saliva from the major salivary glands dominates different areas of the mouth. the parotid (ps) and submandibular/sublingual (sms) saliva differ in their protein composition, and thus, the composition of pellicles formed in various parts of the dentition might vary. in this study, proteins incorporated in 60-min pellicles from the premolar and front regions of the mouths of 4 subjects were examined using sodium dodecyl sulphate-polyacrylamide gel electrophoresis and immunoblotting using antibodie ... | 1998 | 9745119 |
| [case from general practice. agranulocytosis]. | 1998 | 9747134 | |
| oral microbiota and implant type membranes. | candida albicans (ca), staphylococcus aureus (sa), streptococcus sanguis (ss), actinomyces naeslundii (an), actinomyces odontolyticus (ao), porphyromona spp (p spp), candida glabrata (cg), candida krusei (ck), and rhodotorula spp (r spp) were tested with equal pieces of biodegradable membranes. membranes pretreated with saliva or clorhexidine and nontreated control membranes were tested in three different culture media containing 0.1 ml homologous suspension for each strain under study. incubati ... | 1998 | 9759038 |
| a streptococcal adhesion system for salivary pellicle and platelets. | a streptococcus sanguis 133-79 adhesin identified by the monoclonal antibody 1.1 (mab 1.1) binds both saliva-coated hydroxylapatite (sha) and platelets. the complementary binding site(s) for the adhesin was identified by the anti-idiotypical mab 2.1. to learn if this adhesion system, marked by the antiadhesin mab 1.1 and anti-binding site mab 2.1, is commonly used by strains within the sanguis group and other viridans group streptococci, 42 strains from seven species were tested. strains that bi ... | 1998 | 9784548 |
| proliferative response of cd8+ gamma delta+ t cells to streptococcus sanguis in patients with behçet's disease. | to analyze the pathogenesis of behçet's disease (bd), we investigated the immune response of peripheral blood t cell subsets from patients with bd to streptococcus sanguis (s. sanguis) strain kth-i, a bacteria suggested to be associated with the etiology of bd. cultured peripheral blood mononuclear cells (pbmc) of patients with bd activated by lyophilized whole bacterium of s. sanguis were assayed by two-color flow cytometry using monoclonal antibodies (mabs) specific for gamma delta+ t cell rec ... | 1998 | 9785603 |
| treated bacterial endocarditis as a histological mimic of fungal infection. | histological assessment of cardiac valve tissue contributes to the diagnosis of infective endocarditis and is of particular importance in cases in which no organism is cultured. antibiotic treatment of bacterial endocarditis may lead to abnormal bacterial morphology and staining characteristics. although in many cases the presence of some residual bacteria of normal appearance makes the diagnosis straightforward, in some only abnormal bacteria may be seen. unless the appearances of these are int ... | 1998 | 9797734 |
| acid-regulated proteins induced by streptococcus mutans and other oral bacteria during acid shock. | our previous research has demonstrated that with the more aciduric oral bacteria, an acid shock to sub-lethal ph values results in the induction of an acid tolerance response that protects the cells at extremely low ph (ph 3.0-4.0) that kills unadapted control cells maintained at ph 7.5 (oral microbiol immunol 1997: 12: 266-273). in this study, we were interested in comparing the protein profiles of acid-shocked and control cells of nine organisms from three acid-ogenic genera that could be cate ... | 1998 | 9807121 |
| response of single species biofilms and microcosm dental plaques to pulsing with chlorhexidine. | the aim of this study was to determine the effect of pulsing chlorhexidine gluconate, at concentrations commonly used in mouthwashes, on streptococcus sanguis biofilms and microcosm dental plaques in vitro. biofilms were grown on bovine enamel and nutrients were supplied in the form of artificial saliva. pulsing experiments were carried out on steady-state biofilms using 0.05 or 0.2% chlorhexidine solutions delivered twice daily for 1 min. in a separate study, the enamel discs on which the biofi ... | 1998 | 9818743 |
| bacterial eradication from root dentine by ultrasonic irrigation with sodium hypochlorite. | the study aimed to evaluate intracanal irrigation procedures in eradicating bacteria from surface, shallow and deep layers of root dentine using extracted human teeth. artificial bacterial smear layer was successfully produced by rubbing a mixture of dental plaque and artificially decalcified dentine or carious dentine on root canal walls. the reservoir holes were 3.5 mm in depth, 1 mm in diameter prepared 1.5 mm apart and parallel to the root canals on the decrowned planes, in which five separa ... | 1998 | 9823113 |
| streptococcus sanguis-induced platelet clotting in rabbits and hemodynamic and cardiopulmonary consequences. | by mimicking hemostatic structural domains of collagen, streptococcus sanguis (aggregation-positive phenotype; agg+) induces platelets to aggregate in vitro. to test the hypothesis that aggregation occurs in vivo, s. sanguis (agg+ or agg- suspension) was infused intravenously into rabbits. the extent of hemodynamic and cardiopulmonary changes and the fate of circulating platelets were agg+ strain dose dependent. within 45 to 50 s of the start of infusion, 40 x 10(8) cfu of the agg+ strain caused ... | 1998 | 9826372 |
| [alpha-hemolytic streptococci and root canal irrigants. an evaluation of the bactericidal efficacy of sodium hypochlorite and chlorhexidine gluconate plus cetrimide]. | the main bacterial species present in pulpal and periapical microbic flora is alpha-hemolytic streptococci. they are regarded as facultative anaerobes which prefer to grow in anaerobiosis. canal irrigation plays an important role in the success of endodontic treatment given that, on the one hand, it encourages the gradual elimination of the smear layer, and on the other it neutralises microbic flora in the root canal. the aim of this study was to test the microbiological efficacy of sodium hypoc ... | 1998 | 9835743 |
| role of monocytes and bacteria in staphylococcus epidermidis endocarditis. | the endocardial vegetation which is formed in the course of bacterial endocarditis (be) contains tissue factor (tf)-dependent procoagulant activity. earlier studies showed that monocytes are the main source of tf in the vegetations. the tf activity (tfa) of vegetations isolated from streptococcus sanguis-infected rabbits depended on the numbers of bacteria as well as monocytes in the vegetation. in this study, we investigated whether for staphylococcus epidermidis, a frequent pathogen in be, an ... | 1998 | 9453594 |
| assessing the relationship between dental disease and coronary heart disease in elderly u.s. veterans. | several recent studies have shown a link between dental disease and coronary heart disease. the authors studied 320 u.s. veterans in a convenience sample to assess the relationship between oral health and systemic diseases among older people. they present cross-sectional data confirming that a statistically significant association exists between a diagnosis of coronary heart disease and certain oral health parameters, such as the number of missing teeth, plaque benzoyl-dl-arginine-naphthylamide ... | 1998 | 9529805 |
| whole-cell protein electrophoretic analysis of viridans streptococci: evidence for heterogeneity among streptococcus mitis biovars. | one hundred reference strains representing all species belonging to the different phylogenetic lineages of the viridans streptococci were examined by means of one-dimensional whole-organism protein electrophoresis. for most of the species examined, multiple strains characterized by dna-dna hybridization were included and, wherever described, representatives of different biochemical variants were analysed. most species were clearly differentiated. the data support the viewpoint that members of th ... | 1998 | 9542082 |
| microbial complexes in subgingival plaque. | it has been recognized for some time that bacterial species exist in complexes in subgingival plaque. the purpose of the present investigation was to attempt to define such communities using data from large numbers of plaque samples and different clustering and ordination techniques. subgingival plaque samples were taken from the mesial aspect of each tooth in 185 subjects (mean age 51 +/- 16 years) with (n = 160) or without (n = 25) periodontitis. the presence and levels of 40 subgingival taxa ... | 1998 | 9495612 |
| streptococcus sanguis bacteremia and colorectal cancer. | streptococcal bacteremia is an uncommon presentation for colorectal malignancy, yet most physicians are aware of the association between streptococcus bovis infection and these malignancies. many are unaware, however, that other streptococcal species are associated with colon and rectal cancers. in this case report and brief review, we highlight this association and discuss a case of streptococcus sanguis bacteremia associated with an early invasive rectal cancer. | 1998 | 9496877 |
| a comprehensive genetic study of streptococcal immunoglobulin a1 proteases: evidence for recombination within and between species. | an analysis of 13 immunoglobulin a1 (iga1) protease genes (iga) of strains of streptococcus pneumoniae, streptococcus oralis, streptococcus mitis, and streptococcus sanguis was carried out to obtain information on the structure, polymorphism, and phylogeny of this specific protease, which enables bacteria to evade functions of the predominant ig isotype on mucosal surfaces. the analysis included cloning and sequencing of iga genes from s. oralis and s. mitis biovar 1, sequencing of an additional ... | 1998 | 9423856 |
| colonic perforation by ventriculoperitoneal shunt tubing: a case of suspected silicone allergy. | a case of colonic perforation by a ventriculoperitoneal shunt is presented in a patient with several previous complications associated with shunt tubing. | 1998 | 9428890 |
| anaerobic killing of oral streptococci by reduced, transition metal cations. | reduced, transition metal cations commonly enhance oxidative damage to cells caused by hydroperoxides formed as a result of oxygen metabolism or added externally. as expected, the cations fe2+ and cu+ enhanced killing of streptococcus mutans gs-5 by hydroperoxides. however, unexpectedly, they also induced lethal damage under fully anaerobic conditions in a glove box with no exposure to o2 or hydroperoxides from initial treatment with the cations. sensitivities to anaerobic killing by fe2+ varied ... | 1998 | 9435058 |
| [effects of surface roughness of two restorative materials on early streptococcus sanguis adhesion in vitro]. | this was an in vitro study aimed at the surface roughness of two kinds of commonly used restorative materials resin and alloy necessary to affect the adhesive behavior of streptococcus sanguis(s. s) on them after 24 h. the surface roughness(sr) of each tested sample was evaluated with a profilometer quantitatively and observed with scanning electron microscope (sem) morphologically. then the adhesive microbial amount was determined by the clone forming unit counting method, and adhesion morpholo ... | 1998 | 10684003 |
| an in vitro investigation of the antimicrobial activity of an herbal mouthrinse. | the purpose of this study was to determine the antimicrobial activity of one prescription and two commercially available over-the-counter mouthrinses and positive and negative controls against bacteria commonly found in the oral cavity. the bacteria used in this study were streptococcus mutans, streptococcus sanguis and actinomyces viscosus. sterile discs which were treated with the mouthrinses were placed on agar plates along with the controls. zones of microbial inhibition were measured in mil ... | 1998 | 10518853 |
| reversed-phase high-performance liquid chromatographic measurement of the p-aminobenzoic acid synthesized by streptococcus sanguis. | this study investigated the biosynthesis of p-aminobenzoic acid by streptococcus sanguis and the role of p-aminobenzoic acid in the interaction between streptococcus sanguis and streptococcus mutans. | 1998 | 10557192 |
| [the study of precedent subgingival flora colonization on four kinds of crown and bridge restorative materials]. | the purpose of this in vitro study was to investigate the effects of microbial colonization on different crown or fixed bridge-used restorative materials and discuss the standards for evaluating those materials microscopically. four kinds of restorative materials such as sda-ii type medium alloy, ceramic-fused-to-metal material, heat cure composite resin for crown restoration, plat castable ceramics and four species of precedent subgingival flora (a. viscosus, f. nucleterm, c. ochracea, s. sangu ... | 1998 | 12078179 |
| [research on inhibition of sodium fluoride on five subgingival bacteria in vitro]. | this in vitro study was aimed at observing inhibition action of fluoride on 5 common periodontal bacteria in subgingival microflora. the liquid media two-fold dilution method was used to determine the minimal inhibition concentration (mic) of sodium fluoride (naf) to 9 strains of bacteria representing the main periodontopathic species(p. gingivalis, a. actinomycetemcomitans, p. intermedius) and the periodontal beneficial species (s. sanguis) and 1 strain of s. sorbrinus. the results showed that ... | 1998 | 12214405 |
| [study on the biosynthesis of para-aminobenzoic acid by s. sanguis. i. establishment of a reversed-phase high-performance liquid chromatography]. | in order to study the synthesis of para-aminobenzoic acid (paba) by s. mutans and the role of paba in the interaction between s. mutans and s. sanguis, a reversed-phase high-performance liquid chromatography (rp-hplc) for analysis of paba was developed. the results showed that the optimal chromatographic parameters were flow rate of 1.5 ml/min, t = 55 +/- 2 degrees c, methanol/phosphate buffer of 10/90(by vol) (ph 2.2 0.1 mol/l), m-hydroxybenzoic acid as an internal standard. the method is simpl ... | 1998 | 12214420 |
| [study on the biosynthesis of para-aminobenzoic acid by s. sanguis. ii. qualitative and quantitative analysis]. | in this study, the method established in paper 1 was used to analyze paba synthesized by s. sanguis s34. the results showed: 1. s. sanguis s34 did synthesize paba and the mean concentration of paba was 1.236 micrograms/ml. 2. the components had good linear relation and average recovery was 80%. the results of this paper will be helpful to studying influencing factors on paba synthesis of s. sanguis and the roles of paba in microbial homeostasis of dental plaque. | 1998 | 12214421 |
| adherent bacteria cells in five dental materials: sonication effect. | adherent bacterial cells on the surfaces of two dental porcelain ceramics, three composite resins and human enamel were examined using four types of bacteria strains. their adherent cells were counted on saliva-coated and uncoated material surfaces after sonication, and contact angle and zeta potential were measured for each adherent cell tested. a correlation between contact angle and bacterial cells on an uncoated surface was found to be higher in two streptococcus sanguis cells than in s. mut ... | 1998 | 15348918 |
| [partial gene clone and nif gene homologous sequence analysis of streptococcus sanguis]. | to analyze the sequence of streptococcus sanguis chromosome which contains one dna fragment of 800 base pairs (bp) and discuss streptococcus sanguis biological features of heredity. | 1999 | 12539310 |
| [investigation on interaction between streptococcus sanguis and porphyromonas gingivalis in specific pathogen-free rats]. | to examine whether endogenous s. sanguis could prevent, or reduce the colonization of the virulent p. gingivalis strain. | 1999 | 12539373 |
| defense mechanisms of urinary bladder: studies on antimicrobial polypeptides from bladder mucosa. | the acid-soluble extract of the bladder mucosal surface was obtained by washing out the bladder with dilute acetic acid in the presence of protease inhibitors. the wash-out materials from rats, rabbits, pigs, and humans manifested strong bactericidal activity against e. coli in vitro. the ultrafiltrate of the human material, which contained two major peptides with apparent molecular masses of 6.7 kd and 8.5 kd, respectively, showed potent bactericidal activity against e. coli, pseudomonas aerugi ... | 1999 | 12899379 |
| er:yag and alexandrite laser radiation propagation in root canal and its effect on bacteria. | the objective of this study was to compare the bactericidal effect of the er:yag (wavelength 2.94 microm) and the alexandrite (wavelength 0.75 microm) laser radiation. the spreading laser energy in the surrounding hard dental tissues round the root canal was evaluated and the bactericidal effect of both these different laser wavelengths was analyzed. | 1999 | 11800099 |
| [preparation of streptococcus sanguis dig-labeled dna probes and clinical application]. | to investigate oral streptococci nif gene. | 1999 | 12539697 |
| [regulation of adherence to serum-coated hydroxyapatite by streptococcus sanguis]. | to investigate the effects of ph and calcium iron on adhesion of streptococcus sanguis to serum-coated hydroxyapatite. | 1999 | 11776933 |
| current status of taxonomic groups of oral streptococci in endocarditis. can virulence factors discriminate between endocarditis and non-endocarditis strains? | objective: infective endocarditis is frequently caused by oral streptococci, especially streptococcus sanguis. in this group, many strains have recently been reclassified on the basis of new taxonomic schemes. the purpose of this study was to classify oral streptococci from patients with infective endocarditis and, further, to assess the importance of specific virulence factors for the development of streptococcal endocarditis. methods: twenty-eight previously identified and 10 new streptococcal ... | 1999 | 11856221 |
| in vitro activity of quinupristin/dalfopristin against selected bacterial pathogens isolated in italy. | objective: to evaluate the activity of quinupristin/dalfopristin, a new injectable streptogramin, against 732 clinical strains recently isolated in italy. methods: susceptibility tests were performed according to nccls-guided mic methodology. pathogens included in the evaluation included 108 staphylococcus aureus isolates, 124 coagulase-negative staphylococcal isolates, 158 streptococcus pyogenes isolates, 30 streptococcus agalactiae isolates, 30 b-hemolytic streptococcal isolates, 18 streptococ ... | 1999 | 11856292 |
| prevalence of the amylase-binding protein a gene (abpa) in oral streptococci. | salivary amylase binds specifically to a number of oral streptococcal species. this interaction may play an important role in dental plaque formation. recently, a 585-bp gene was cloned and sequenced from streptococcus gordonii challis encoding a 20.5-kda amylase-binding protein (abpa). the goal of this study was to determine if related genes are present in other species of oral streptococci. biotinylated abpa was used in southern blot analysis to screen genomic dna from several strains represen ... | 1999 | 10565935 |
| experimental uveitis induced by intravitreal or intravenous lipoteichoic acid in rabbits. | to investigate the role of lipoteichoic acid (lta), one of the cell wall components in gram-positive bacteria in uveitis. | 1999 | 10580658 |
| the transfer of bacteria to, and survival on, dental records. | the purpose of this study was to ascertain whether viable bacteria could be transferred from gloves to laboratory cards in dental records and, if so, to determine whether bacteria could survive on the paper. the thumbs and forefingers of two types of glove (biogel d and microtouch) were inoculated with streptococcus sanguis and left for various periods of time. a sterile dental laboratory card was then held with the gloves and the number of bacteria surviving on the card determined after various ... | 1999 | 10581730 |
| investigation of bacteremia after orthodontic banding. | the aim of this study was to assess the incidence of bacteremia after orthodontic banding. the study was conducted on 40 healthy orthodontic patients with good oral hygiene. venous blood samples were obtained with a strict aseptic technique before and after fitting of a molar band in each patient. microbiologic evaluation of the samples revealed a postoperative bacteremia incidence of 7.5%. | 1999 | 10587604 |
| efficacy of levofloxacin in the treatment of experimental endocarditis caused by viridans group streptococci. | levofloxacin was investigated against viridans group streptococci in vitro and in rats with experimental aortic endocarditis. the mic(90)s of levofloxacin and ciprofloxacin for 20 independent isolates of such bacteria were 1 and 8 mg/l, respectively. rats were infected with two types of organism: either fully susceptible to levofloxacin mic < or = 0.5 mg/l) or borderline susceptible (mic 1-2 mg/l). fully levofloxacin-susceptible bacteria comprised one penicillin-susceptible (mic 0.004 mg/l) stre ... | 1999 | 10590278 |
| systemic doxycycline administration in the treatment of periodontal infections (ii). effect on antibiotic resistance of subgingival species. | the purpose of this investigation was to determine the proportion and prevalence of doxycycline resistant species in subgingival plaque samples taken during and after doxycycline administration. 20 subjects with adult periodontitis were randomly assigned to test (n = 10) or control groups (n = 10). saliva samples as well as subgingival plaque samples taken from the distal surface of 6 posterior teeth were collected at baseline. all subjects received full mouth srp and the test group systemic dox ... | 1999 | 10599905 |
| automatic enumeration of adherent streptococci or actinomyces on dental alloy by fluorescence image analysis. | the aim of the present study was to develop an automated image analysis method to quantify adherence of streptococcus sanguinis or actinomyces viscosus on surfaces of a currently used dental alloy. counting such bacterial strains was difficult because of their arrangement, thus s. sanguinis being a coccus arranged in chains or pairs, and a. viscosus a long complexly arranged polymorph rod. direct counting of fluorescently stained adherent bacteria was done visually and with image analysis method ... | 1999 | 10520583 |
| inhibitory effects of oolong tea extract on caries-inducing properties of mutans streptococci. | the inhibitory effects of oolong tea extract (ote) on the caries-inducing properties of mutans streptococci were examined in vitro. ote reduced the rate of acid production by mutans streptococci accompanied with the retardation of growth rate of mutans streptococci, while the action by chromatographically isolated oolong tea polyphenol (otf6) was weak. on the other hand, both oolong tea products decreased cell surface hydrophobicity of almost all the oral streptococci examined in the present stu ... | 1999 | 10529529 |
| beta-hemolytic streptococci and other beta-hemolytic organisms in apical periodontitis and severe marginal periodontitis. | thirteen teeth with necrotic pulps and apical periodontitis and nine severe periodontal pockets were cultured for presence of beta-hemolytic streptococci and other beta-hemolytic organisms. samples were dispersed and plated on two non-selective and one selective growth media and incubated anaerobically and in 10% co2 in air. a total of 59 beta-hemolytic colonies were purified and identified. eight beta-hemolytic streptococcal isolates were obtained from three of the severe marginal periodontitis ... | 1999 | 10530151 |
| an evaluation of the action of different root canal irrigants on facultative aerobic-anaerobic, obligate anaerobic, and microaerophilic bacteria. | the aim of this study was to test the effect of different concentrations of sodium hypochlorite, chlorhexidine, and cetrimide on the following bacterial strains: facultative aerobes-anaerobes: candida albicans atcc 10231; enterococcus faecalis atcc 29212; escherichia coli atcc 25,922; pseudomonas aeruginosa atcc 27,853; streptococcus mitis atcc 9811; streptococcus mutans atcc 35668; streptococcus salivarius atcc 13419; and streptococcus sanguis atcc 10556. microaerophiles: actinobacillus actinom ... | 1999 | 10530260 |
| bacterial species- and strain-dependent induction of tissue factor in human vascular endothelial cells. | a cardinal process in bacterial endocarditis (be) is the activation of the clotting system and the formation of a fibrin clot on the inner surface of the heart, the so-called endocardial vegetation. the processes that lead to the activation of the clotting system on endothelial surfaces upon exposure to bacteria are largely unknown. in the present study, we investigated in an in vitro model whether infection of human endothelial cells (ec) with bacteria that are relevant to be, such as staphyloc ... | 1999 | 10531276 |
| multiple infections in carotid atherosclerotic plaques. | chlamydia pneumoniae, cytomegalovirus, herpes simplex virus, and recently, periodontal disease, have been associated with human atherosclerosis. porphyromonas gingivalis and streptococcus sanguis are major pathogens associated with periodontitis, a common chronic inflammatory condition in adults. investigators have found that these infectious agents may influence vascular cell functions by inducing thrombus formation, vascular cell proliferation, apoptosis, and cell death. | 1999 | 10539867 |
| efficacy of levofloxacin for experimental aortic-valve endocarditis in rabbits infected with viridans group streptococcus or staphylococcus aureus. | levofloxacin is among the more active fluoroquinolones against streptococci and staphylococci. it is effective against moderately severe infections caused by these organisms, but its efficacy in the treatment of bacteremia and serious infections such as endocarditis is not well defined. we compared the efficacy of levofloxacin to those of standard agents in the rabbit model of aortic-valve endocarditis caused by fluoroquinolone-susceptible strains including a penicillin-susceptible strain of str ... | 1999 | 10543757 |
| membrane locus and ph sensitivity of paraben inhibition of alkali production by oral streptococci. | parabens were found to be potent inhibitors of alkali production from arginine by oral streptococci such as streptococcus rattus, streptococcus sanguis and streptococcus gordonii. for example, 2 mumol butylparaben per ml completely and irreversibly inhibited arginolysis by intact cells of s. rattus fa-1 and was lethal for the organism. in contrast, butylparaben was not a very effective inhibitor of ureolysis by intact cells of streptococcus salivarius 57.i, although it did kill the cells. butylp ... | 1999 | 10551169 |
| identification of clinically relevant viridans streptococci by analysis of transfer dna intergenic spacer length polymorphism. | the utility of pcr analysis of transfer dna intergenic spacer length polymorphism (tdna-ilp) for the identification to the species level of clinically relevant viridans streptococci was evaluated with a collection of reference strains of 15 species of the salivarius, anginosus, mitis and mutans rrna homology groups. pcr products generated by using fluorescent, outwardly directed, consensus tdna primers were analysed by electrophoresis on denaturating polyacrylamide gels and by laser fluorescence ... | 1999 | 10555340 |
| effects of hydrogen peroxide on growth and selected properties of porphyromonas gingivalis. | in this study we first evaluated the effects of hydrogen peroxide (h2o2) on growth and selected properties of porphyromonas gingivalis, and compared them with those obtained by a reducing agent (cysteine). the growth of p. gingivalis was only moderately affected when h2o2 was added at concentrations up to 30 mm in a complex culture medium. however, when a defined basal medium was used, h2o2 at a concentration of 3 mm completely inhibited growth of p. gingivalis. incorporation of cysteine at conc ... | 1999 | 10339828 |
| infective endocarditis: an epidemiological review of 128 episodes. | the objective was to determine the current epidemiology of infective endocarditis. | 1999 | 10342647 |
| emergence of antibiotic resistant streptococcus sanguis in dental plaque of children after frequent antibiotic therapy. | in the pediatric population, several different antibiotic regimens are currently recommended for the treatment of otitis media. this study investigated whether therapy for otitis media was associated with the emergence of antibiotic-resistant oral bacteria. | 1999 | 10355009 |
| severe, rapidly progressing peri-implantitis. | the replacement of teeth by means of titanium implants is a safe and predictable procedure in most patients. some studies show that a small number of patients lose the majority of their implants. unfortunately, it is impossible to identify these patients prior to surgery. it is important to report such cases so that we may, in the future, be able to identify them before surgery. the present case showed a severe and rapid exfoliation of titanium implants. out of 8 implants inserted in the anterio ... | 1999 | 10355623 |
| the effects of histatin-derived basic antimicrobial peptides on oral biofilms. | susceptibility of bacteria to antimicrobial agents is strongly reduced by the formation of complex biofilms. we investigated whether synthetic histatin analogs with broad-spectrum antibacterial activity in vitro were also active against these complex mixtures of bacteria, as present in saliva and plaque. in a simplified model system for dental plaque, hydroxyapatite discs were placed in a continuous culture system comprised of streptococcus mutans, s. sanguis, s. salivarius, actinomyces naeslund ... | 1999 | 10371248 |
| removal of infected pacemaker leads with deep hypothermic circulatory arrest and open surgical exploration of the superior vena cava and innominate veins. | despite the use of transvenous methods for extraction of infected leads, failed attempts may result in retained lead fragments. retained lead fragments may be a focus of continued infection leading to sepsis. we present two patients in which conversion from cardiopulmonary bypass to hypothermic circulatory arrest allowed direct visualization, using venotomies in the superior vena cava and innominate vein to achieve complete removal of retained pacemaker lead fragments. use of venotomies in the e ... | 1999 | 10392398 |
| polymicrobial etiology of dental caries. | the present study was carried out to establish the normal bacterial oral flora and the aerobic and anaerobic bacterial flora from deep seated dental caries, and to determine the antimicrobial sensitivity of the clinical isolates so obtained streptococcus mutans (48%) and streptococcus sanguis (20%) were the main aerobic isolates whereas lactobacillus spp. (52%), veillonella spp. (24%) and actinomyces spp. (12%) were the major anaerobic isolates. hundred percent of the samples from dental caries ... | 1999 | 10420681 |
| cure of implantable venous port-associated bloodstream infections in pediatric hematology-oncology patients without catheter removal. | the efficacy of antibiotic treatment of port-associated bloodstream infection without device removal has not been systematically studied. we analyzed the outcome of 43 consecutive port-associated bloodstream infections in pediatric hematology-oncology patients. etiologies included staphylococcus epidermidis (30) and staphylococcus aureus (6). antibiotics were given through the port for a median of 11 days. four ports were removed within 72 hours. in 36 (92%) of the remaining 39 episodes, there w ... | 1999 | 10433571 |
| deposition and retention of vital and dead streptococcus sanguinis cells on glass surfaces in a flow-chamber system. | the proportion of vital as compared with dead streptococcus sanguinis cells attached to glass surfaces was monitored and related to varying proportions of planktonic vital as compared with dead strep. sanguinis cells. in a flow chamber with six parallel-mounted glass plates, strep. sanguinis was suspended in pretreated sterile human saliva. deposition of strep. sanguinis took place, with a proportion of vital sanguinis streptococci in saliva (%vss) of 90%, 45% or 22.5%. after exposure times of 3 ... | 1999 | 10459773 |
| in vitro activities of fluoroquinolones against antibiotic-resistant blood culture isolates of viridans group streptococci from across canada. | among 418 blood culture isolates of viridans group streptococci obtained between 1995 and 1997, the in vitro rates of nonsusceptibility to penicillin, erythromycin, tetracycline, and trimethoprim-sulfamethoxazole were 28, 29, 24, and 14%, respectively. the most prevalent group (125 strains) was streptococcus mitis, followed by streptococcus sanguis (56 strains). for 236 (56%) strains resistant to one or more antibiotics, the ciprofloxacin mic at which 90% of the isolates were inhibited (mic(90)) ... | 1999 | 10471583 |
| adhesion and surface-aggregation of candida albicans from saliva on acrylic surfaces with adhering bacteria as studied in a parallel plate flow chamber. | adhesive interactions between candida albicans and oral bacteria are generally thought to play a crucial role in the microbial colonization of denture acrylic, which may lead to denture stomatitis. this study investigated the influence of saliva on the adhesive interactions between c. albicans and streptococcus sanguis or actinomyces naeslundii on denture acrylic. first, bacteria were allowed to adhere to the acrylic surface from a flowing suspension, and subsequently yeasts were flowed over the ... | 1999 | 10510723 |
| genetic approaches to the identification of the mitis group within the genus streptococcus. | the usefulness and reliability of partial sequence analysis of the manganese-dependent superoxide dismutase gene (soda), autolysin (lyta) gene amplification and species-specific pcr based on the d-alanine:d-alanine ligase (ddl) gene for differentiating each member of the mitis group of the genus streptococcus was investigated. on the phylogenetic tree based on soda partial sequences (366 bp) from 96 strains, including all species currently within the mitis group isolated in different geographic ... | 1999 | 10517614 |
| periodontal findings and systemic antibody responses to oral microorganisms in behçet's disease. | behçet's disease is a multisystem disorder of unknown etiology, affecting predominantly the oral mucosa, skin, and eyes. recurrent and painful episodes of oral ulcerations interfere with regular oral hygiene leading to rapid bacterial plaque accumulation. the aims of this study were to evaluate the periodontal status of patients with behçet's disease and determine serum antibody responses to selected oral microorganisms, including major periodontopathogens in these patients. | 1999 | 10632520 |
| factors which are associated with dental decay in the older individual. | to improve reliability of salivary bacterial cultures as a surrogate for plaque levels of cariogenic bacterial species by reporting the salivary cfus of these organisms as a function of the number of teeth. | 1999 | 10687507 |
| bacterial microleakage of cavit, irm, term, and fermit: a 21-day in vitro study. | the aim of our study was to evaluate the leakage of four cements (cavit, irm, term, and fermit) using a two-compartment model system and streptococcus sanguis as bacterial marker. access cavities in premolars were filled with cement and the teeth immersed in culture medium in the model system. half of the teeth were thermocycled on day 2. bacterial percolation into the upper compartment was measured at regular intervals (days 2, 7, 14, and 21). cement thickness was measured at the end of the stu ... | 1999 | 10687522 |
| construction and analysis of a streptococcus parasanguis reca mutant: homologous recombination is not required for adhesion in an in vitro tooth surface model. | pcr was used to amplify an internal region of the reca gene from streptococcus parasanguis fw213. the pcr fragment was used as a probe to recover the entire streptococcal reca gene from an s. parasanguis genomic library, and the sequence of the gene was determined. the deduced product of the s. parasanguis reca gene showed a high degree of amino acid identity with other prokaryotic reca proteins. the cloned reca sequence was disrupted in vitro by insertional mutagenesis, and the mutated allele w ... | 1999 | 9864313 |
| identification of oral mitis group streptococci by arbitrarily primed polymerase chain reaction. | "mitis group" streptococci are commensal but may play some role in dental caries, septicemia or endocarditis. rapid genotypic identification would aid studies of dental plaque ecology, or diagnostic use. ap-pcr with 58 unpaired arbitrary primers was used to characterize 7 streptococcus gordonii, 11 streptococcus sanguis, 2 streptococcus crista, 5 streptococcus parasanguis, 18 streptococcus oralis, and 36 streptococcus mitis (22 biovar 1 and 14 biovar 2). s. parasanguis 16s rrna variable region p ... | 1999 | 10204478 |
| acid-induced acid tolerance and acidogenicity of non-mutans streptococci. | acid tolerance and acidogenicity of non-mutans streptococci and their capacity of acid adaptation were studied. the cells of non-mutans streptococci (streptococcus sanguis [streptococcus sanguinis], streptococcus gordonii, streptococcus oralis and streptococcus mitis) grown at ph 7.0 showed 0.0088% to 71% viability after acidification at ph 4.0 for 60 min, whereas the cells of mutans streptococci (streptococcus mutans) were not killed by the acidification. washed cells of non-mutans streptococci ... | 1999 | 10204479 |
| primary bacterial colonization of implant surfaces. | the purpose of this study was to assess the effects of modifying titanium surfaces, in terms of wettability, roughness, and mode of sterilization, on the ability of the oral bacterium streptococcus sanguis to colonize. an in vitro model system was developed. all surfaces were colonized by the bacteria, but to significantly different levels. titanium samples that exhibited rough or hydrophobic (low wettability) surfaces, along with all autoclaved surfaces, were preferentially colonized (p < .01). ... | 1999 | 10212539 |
| increased levels of transforming growth factor beta 1 and basic fibroblast growth factor in patients on capd: a study during non-infected steady state and peritonitis. | long-term influence of continuous ambulatory peritoneal dialysis (capd) on concentrations of transforming growth factor beta1 (tgf-beta1) and basic fibroblast growth factor (bfgf) in the peritoneal effluent, and the effect of peritonitis on these cytokines were investigated. tgf-beta1 and bfgf were assayed in effluent samples from dialysate bags collected during the initial week of treatment with capd and at 5 months. to determine the effect of peritonitis, dialysate bags were collected on admis ... | 1999 | 10213269 |