| septic arthritis due to streptococcus sanguis. | we report an unusual case of septic arthritis due to streptococcus sanguis, a member of the viridans group of streptococci that are part of the normal flora of the mouth and upper respiratory tract. our patient had severe underlying periodontal disease, which likely contributed to his joint sepsis through hematogenous spread. although viridans streptococci are rare causes of septic arthritis in native joints, they should be considered in the setting of severe periodontal disease. | 2002 | 12108609 |
| influence of secondary colonizers and human plasma on the adherence of porphyromonas gingivalis in vitro. | the influence of secondary colonizers (fusobacterium nucleatum and actinomyces naeslundii) and the effect of human plasma on the adherence of porphyromonas gingivalis were investigated. hydroxyapatite (hap) discs coated with streptococcus sanguis were immersed in a 3h-labeled bacterial cell suspension of f. nucleatum or a. naeslundii and then in a 14c-labeled p. gingivalis cell suspension. bacterial cells on the discs were pyrolysed to quantify the radioisotopes released. the cell numbers of sec ... | 2002 | 12120708 |
| intracellular and extracellular phs of streptococcus mutans after addition of acids: loading and efflux of a fluorescent ph indicator in streptococcal cells. | a ph-sensitive fluorescent dye, 2', 7'-bis-(2-carboxyethyl)-5 and 6-carboxyfluorescein (bcecf), was used to determine intracellular ph (ph(in)). the efflux of bcecf loaded into oral streptococcal cells was determined after incubation of the cells at 35 degrees c for 20 min in the presence and absence of glucose. in the absence of glucose, the fluorescence of intracellular bcecf in streptococcus mutans, streptococcus sanguis, streptococcus salivarius and streptococcus sobrinus decreased only very ... | 2002 | 12121474 |
| the relationship between odontogenic bacteraemia and orthodontic treatment procedures. | the purpose of this research was to estimate the prevalence and intensity of bacteraemia associated with orthodontic treatment procedures. the four procedures investigated were: an upper alginate impression, separator placement, band placement, and adjustment of an archwire on a fixed appliance. eighty-one children undergoing general anaesthesia (ga) for dento-alveolar surgery related to their orthodontic treatment were randomly allocated to the impression or separator group. a further 61 childr ... | 2002 | 12143093 |
| streptococcus sanguis modulates type ii collagen-induced arthritis in dba/1j mice. | native type ii collagen is tolerogenic when given orally or i.p. to dba/1j mice and induces autoimmune arthritis when given s.c. in cfa. the tolerogenic epitope is contained in cyanogen bromide fragment 11 (cb11) and is structurally mimicked by pgeqgpk within the platelet aggregation-associated protein (paap) on streptococcus sanguis. to learn whether s. sanguis modulates transmucosally the ag-specific development of autoimmune arthritis, dba/1j pups were given live s. sanguis, cb11, or type ii ... | 2002 | 12165549 |
| periodontitis as a risk factor for cardiovascular disease. | | 2000 | 12167894 |
| groesl sequence determination, phylogenetic analysis, and species differentiation for viridans group streptococci. | the full-length sequences of the groesl genes (also known as cpn10/60) of streptococcus anginosus, streptococcus constellatus, streptococcus gordonii, and streptococcus sanguis and the near full-length sequence of the groesl genes of streptococcus intermedius, streptococcus bovis, streptococcus mitis, streptococcus mutans, streptococcus oralis, and streptococcus salivarius were determined. the lengths of the groes genes from the 10 species listed above ranged from 282 to 288 bp, and the full-len ... | 2002 | 12202549 |
| [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 |
| enhanced neutrophil emigration and porphyromonas gingivalis reduction following pgg-glucan treatment of mice. | periodontal disease is the consequence of a mixed gram-negative infection in the gingival sulcus and has been associated with deficits in the neutrophil response. a novel, and heretofore untested, alternative approach to therapy is the use of biological-response modulators that enhance the neutrophil response. poly-beta1-6-glucotriosyl-beta1-3-glucopyranose glucan (pgg-glucan) is an immunomodulator, derived from yeast, which specifically enhances neutrophil priming, phagocytosis and bacterial ki ... | 2002 | 12221019 |
| [microbiological validation of the choice of basic plastic for removable dentures]. | adhesion of obligate and facultative anaerobic bacteria, favoring the development of oral inflammatory diseases, including the cariesogenic and periodontogenic bacteria and candida albicans fungi, isolated from patients with periodontitis, to 13 basic materials used in removable denture making, was studied. the adhesion of all bacteria (streptococcus sanguis, prevotella melangogenica, fusobacterium nucleatum, corynebacterium xerosis) and fungi to hot polymerization basic materials was the maximu ... | 2002 | 12224327 |
| in vitro study of transmission of bacteria from contaminated metal models to stone models via impressions. | the purpose of this study was to determine the risk of microbiological transmission into the dental laboratory via impressions and dental stone models. metal master models were contaminated with bacillus subtilis and streptococcus sanguis. impressions in alginate, polyvinylsiloxane, and polyether were used, and models were cast in two brands of dental stone. samples were taken from the impression surfaces before and after casting, and sections from the stone models were taken by a technique deve ... | 2002 | 12271350 |
| streptococcus sanguis meningitis: report of a case. | a 35-year-old woman who presented with acute purulent meningitis and hearing loss was reported. no bacteria was seen with gram' s stain of cerebrospinal fluid (csf). csf grew streptococcus viridans, which was subsequently identified to be s. sanguis. the patient improved after treatment, including hearing. | 2002 | 12296418 |
| monocytes maintain tissue factor activity after cytolysis of bacteria-infected endothelial cells in an in vitro model of bacterial endocarditis. | intravascular infection with staphylococcus aureus, staphylococcus epidermidis, or streptococcus sanguis can initiate fibrin formation on endocardial tissue, causing bacterial endocarditis. the ability of these bacteria to injure intact endothelial cells (ecs) and to aggravate tissue factor (tf)-dependent coagulation in the presence of blood leukocytes was investigated. cytolysis of ecs occurred after infection with s. aureus and, with membrane-bound monocytes or granulocytes present, also after ... | 2002 | 12355366 |
| the effect of para-aminobenzoic acid on growth and metabolism of porphyromonas gingivalis. | to study the effect of para-aminobenzoic acid (paba) on the growth and metabolism of porphyromonas gingivalis (p.g). | 2002 | 12411175 |
| the relativity between streptococcus sanguis group and coronary heart disease. | to study the relativity between streptococcus sanguis group (ssg) and coronary heart disease (chd). | 2002 | 12419151 |
| a retrospective investigation of advanced periodontal disease as a risk factor for septicemia in hematopoietic stem cell and bone marrow transplant recipients. | septicemia is a cause of death in hematopoietic stem cell transplant (hsct) recipients. extraction of teeth with advanced periodontitis has been advocated before hsct to prevent septicemia in myeloablated hosts. the primary aim of the present study was to determine impact of chronic periodontitis, as measured by radiographic alveolar bone loss, on septicemia and transplant mortality. | 2002 | 12424452 |
| increased proliferative response of peripheral blood mononuclear cells and t cells to streptococcus mutans and glucosyltransferase d antigens in the exacerbation stage of recurrent aphthous ulcerations. | cytotoxic t lymphocyte-induced lysis of virus-infected oral epithelial cells has been shown to be a cause of early ulcer formation in recurrent aphthous ulcerations (rau). to test whether bacteria and their associated antigens are involved in the disease process of rau, the proliferative response (pr) to different streptococcal species in peripheral blood mononuclear cells (pbmc) and t cells isolated from rau patients at the exacerbation stage was determined. | 2002 | 12440086 |
| selective lethal photosensitization of methicillin-resistant staphylococcus aureus using an igg-tin (iv) chlorin e6 conjugate. | the growing resistance of methicillin-resistant staphylococcus aureus (mrsa) to conventional antimicrobial agents necessitates the development of alternative approaches to preventing and treating infections. one such approach is photodynamic therapy, whereby target cells are treated with light-activated drugs (photosensitizers). this investigation aimed to determine whether the ability of mrsa to express the igg-binding protein, protein a, could be exploited to enable selective lethal photosensi ... | 2002 | 12461004 |
| bactericidal effect of the er:yag laser on dental implant surfaces: an in vitro study. | the aim of the in vitro study was to examine the bactericidal effect of an er:yag laser on common dental implant surfaces. | 2002 | 12479633 |
| correlations between bacterial levels in autologous subgingival plaque and saliva of adult sudanese. | the aim of this study was to assess levels of oral bacteria and their correlations in paired samples of saliva and subgingival plaque in a population of adult sudanese. whole saliva and pooled subgingival plaque samples from six probing sites of one tooth in each jaw were obtained from 56 sudanese adults (mean age 35.2+/-8.9 years). levels of 24 oral bacteria in the autologous saliva and pooled plaque sample of each subject were assessed by dna probes and checkerboard dna-dna hybridization. ther ... | 2002 | 12483235 |
| [pyruvate oxidase gene from streptococcus sanguis: molecular cloning and sequence analysis of the gene]. | to clone and sequence the gene of pyruvate oxidase (sopox) from streptococcus sanguis. | 2001 | 12536558 |
| mitral valve aneurysm associated with aortic valve endocarditis and regurgitation. | mitral valve aneurysms are rare complications occurring most commonly in association with aortic valve infective endocarditis. [decroly 1989, chua 1990, northridge 1991, karalis 1992, roguin 1996, mollod 1997, vilacosta 1997, cai 1999, vilacosta 1999, teskey 1999, chan 2000, goh 2000, marcos- alberca 2000] while the mechanism of the development of this lesion is unclear, complications such as perforation can occur and lead to significant mitral regurgitation. [decroly 1989, karalis 1992, teskey ... | 2002 | 12538147 |
| [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 |
| [the disinfection efficiency comparison of different treatments on dental impression and gypsum casts]. | in this study, the disinfecting efficiency of five disinfecting methods to three bacterial: staphylococcus epidermidis, streptococcus sanguis and bacillus subtilis were evaluated. | 2000 | 12539655 |
| [preparation of streptococcus sanguis dig-labeled dna probes and clinical application]. | to investigate oral streptococci nif gene. | 1999 | 12539697 |
| [a comparative study on the capacities of different strains of streptococcus sanguis for p-aminobenzoic acid production]. | this study was intended to compare the capacities of different strains of strep, sanguis for p-aminobenzoic acid (paba) production. the synthesis of paba during the growth of four strains of strep. sanguis was measured by the reversed-phase high-performance liquid chromatographic method. the results showed that the concentrations of paba synthesized by s. sanguis 10556, s. sanguis 10557, s. sanguis s34 and s. sanguis h7-4. were 1.979 +/- 0.081 micrograms/ml, 1.383 +/- 0.193 micrograms/ml, 1.983 ... | 2000 | 12545834 |
| [isolated primary streptococcal tricuspid endocarditis. a case report]. | the authors report a new case of primitive isolated endocarditis of the tricuspid valve. the microorganism responsible, streptococcus sanguis, is unusual in its localization and in this environment. the uncomplicated evolution poses the problem of deciding what action should be taken vis-à-vis the persistence of an important isolated vegetation after effective antibiotic treatment. therapeutic abstention was chosen rather than surgical intervention in light of the literature. a spontaneous pulmo ... | 2000 | 12555493 |
| influence of short-term sucrose exposure on plaque acidogenicity and cariogenic microflora in individuals with different levels of mutans streptococci. | the aim was to study the short-term effect of a varying sucrose exposure on plaque acidogenicity and cariogenic microflora in two groups of subjects with different levels of mutans streptococci (ms). eight subjects with low (<10(4)) and 8 with high (>10(6)) numbers of ms per millilitre saliva participated. three 7-day test periods were conducted. during two of these, the subjects rinsed either 5 or 10 times daily with 10% sucrose; the third period without any mouth rinses served as control. the ... | 2003 | 12566640 |
| synergy of binary poly(oxypropylene-oxyethylene) copolymers in reducing retention of streptococcus sanguis to hydroxyapatite. | binary poly(oxypropylene-oxyethylene) block copolymer systems have been investigated as a non-bactericidal approach to reduce the retention of an oral bacterium, streptococcus sanguis. using a previously validated hydroxyapatite-coated microtitre model to simulate the tooth, the performance of copolymer pairs was measured experimentally. a synergy index and an efficacy index were defined to describe the reduction of bacterial retention by the binary systems that comprise the copolymer pairs. rel ... | 2003 | 12566643 |
| antigenic as well as nonantigenic stimuli induce similar middle ear responses in the rat. | the observation that during otitis media many different types of micro-organisms have been cultured from effusions indicate that, once present in the middle ear cavity, most types of micro-organisms are able to trigger an inflammatory reaction leading to otitis media. the present study was designed to determine the middle ear response after injection of different substances into the middle ear cavity. | 2003 | 12567090 |
| moderation of oral bacterial adhesion on saliva-coated hydroxyapatite by polyaspartate. | synthetic sodium alpha,beta-polyaspartate (pa) has been investigated as a moderator of adhesion and the subsequent biofilm formation by oral bacteria. | 2003 | 12588554 |
| genetic and biochemical characterization of the f-atpase operon from streptococcus sanguis 10904. | oral streptococci utilize an f-atpase to regulate cytoplasmic ph. previous studies have shown that this enzyme is a principal determinant of aciduricity in the oral streptococcal species streptococcus sanguis and streptococcus mutans. differences in the ph optima of the respective atpases appears to be the main reason that s. mutans is more tolerant of low ph values than s. sanguis and hence pathogenic. we have recently reported the genetic arrangement for the s. mutans operon. for purposes of c ... | 2003 | 12591869 |
| the effect of increasing copper content in phosphate-based glasses on biofilms of streptococcus sanguis. | this paper reports the effect of a series of phosphate-based glasses based on the na(2)o-cao-p(2)o(5) system doped with increasing amounts of copper and the effect of this increasing copper content on the viability of an in vitro biofilm of streptococcus sanguis over an 8 day period in a constant depth film fermenter. the addition of copper to the glass caused the solubility to change, so the glasses were adjusted in order that their solubility in artificial saliva was nominally the same (0.3062 ... | 2003 | 12593962 |
| amino acid sequence requirements in the hinge of human immunoglobulin a1 (iga1) for cleavage by streptococcal iga1 proteases. | the amino acid sequence requirements in the hinge of human immunoglobulin a1 (iga1) for cleavage by iga1 proteases of different species of streptococcus were investigated. recombinant iga1 antibodies were generated with point mutations at proline 227 and threonine 228, the residues lying on either side of the peptide bond at which all streptococcal iga1 proteases cleave wild-type human iga1. the amino acid substitutions produced no major effect upon the structure of the mutant iga1 antibodies or ... | 2003 | 12595464 |
| [the influence of two implant materials on the growth of three subgingival predominant bacteria]. | commercially pure titanium and titanium alloy as dental implants have show impressive clinical results. despite the high success rates, some implants do fail. compared to those studies on osseointegration of implants, the information pertaining to their failure is little. further studies on the relationship between implant material and micro-organism are needed. the purpose of this investigation is to study the effect of two commonly used implant materials titanium (ta2) and ti-6ai-4v alloy (tc4 ... | 2002 | 12599430 |
| [influence of different dna extractions on the identification of streptococcus sanguis group by arbitrary primed polymerase chain reaction] | objective: to assess the influence of different dna extractions on the identification of streptococcus sanguis group (ssg) species by arbitrary primed polymerase chain reaction (ap-pcr). methods: ap-pcr was used to distinguish ssg species by designing 25bp arbitrary primer 5'aag aga gga gct agc tct tct tgg a 3', and the genomic dna was extracted by 3 methods. results: there were great differences in the main band of dna polymorphism among ssg species. the similar band could be got from the diffe ... | 2002 | 12601867 |
| efficacy of naocl/h2o2 irrigation and gaalas laser in decontamination of root canals in vitro. | to investigate the bactericidal effect of an 809 nm semiconductor laser alone, and in combination with naocl/h(2)o(2) irrigation in root canals in vitro. | 2003 | 12605425 |
| a rapid solid-phase fluorimetric assay for measuring bacterial adherence, using dna-binding stains. | in this report, we describe the validation of a rapid, single-step, microtiter plate method for quantifying bacterial adherence, based on fluorescent labeling of microorganisms with cell-permeable fluorescent dna-binding probes. we have tested the binding to saliva-coated microtiter plates of bacteria, including helicobacter pylori and viridans streptococci (s. mitis, s. gordonii, s. sanguis), known to interact with salivary components. furthermore, we tested the short-term and longer-term tempo ... | 2003 | 12609723 |
| bactericidal effects of different laser wavelengths on periodontopathic germs in photodynamic therapy. | this study was an attempt to clarify whether the bactericidal effects of photodynamic therapy (pdt) are wavelength or dose-dependent. we also attempted to create an optimised protocol for a light-based bactericidal modality to eliminate periodontal pathogens. cultures of actinobacillus actinomycetemcomitans, fusobacterium nucleatum, porphromonas gingivalis, prevotella intermedia, and streptococcus sanguis, were exposed to a he-ne laser (632.8 nm) with a 30 mw power output, a 100 mw diode laser a ... | 2003 | 12627274 |
| the diagnosis and management of recurrent aphthous stomatitis: a consensus approach. | recurrent aphthous stomatitis, or ras, is a common oral disorder of uncertain etiopathogenesis for which symptomatic therapy only is available. this article reviews the current data on the etiopathogenesis, diagnosis and management of ras in a primary care setting. | 2003 | 12636124 |
| in vitro testing of xylitol as an anticariogenic agent. | a number of studies involving xylitol chewing gum have demonstrated that xylitol is both noncariogenic and anticariogenic. the ability of xylitol to act as an anticariogenic agent most likely is due to its ability to be transported into caries-causing oral bacteria and inhibiting fermentation either by depleting the cell of high-energy phosphate or by poisoning the glycolytic system. in vitro tests were conducted to determine the concentration of xylitol required to inhibit the growth of three s ... | 2002 | 12640850 |
| comparison of antiadhesive and antibacterial effects of antiseptics on streptococcus sanguinis. | three antiseptic (chlorhexidine, olaflur, octenisept) and one putative antiadhesive (chitosan) agent were investigated for their effect on viable planktonic and attached streptococcus sanguinis cells. the bacterial pretreatment with each chemotherapeutic was performed in two steps: (i) after the exposure of planktonic streptococci to the antiseptics, the cells were suspended in human sterile saliva and allowed to attach to human enamel for 60 min; (ii) after 60 min in the flow chamber system, in ... | 2003 | 12648266 |
| kuwanon g: an antibacterial agent from the root bark of morus alba against oral pathogens. | kuwanon g was isolated from the ethyl acetate fraction of methanol extract of morus alba and its structure was elucidated by 13c-nmr, 1h-nmr and fab-ms. antibacterial activity of kuwanon g was investigated by the minimum inhibitory concentration (mic) test and the viable cell count method. mic of kuwanon g against streptococcus mutans causing dental caries was determined to be 8.0 microg/ml. the bactericidal test showed that kuwanon g completely inactivated s. mutans at the concentration 20 micr ... | 2003 | 12648813 |
| prevalence of csh-like fibrillar surface proteins among mitis group oral streptococci. | the prevalence of csh-like fibrillar surface proteins among oral streptococci was investigated by elisa and by immunoelectron microscopy using antiserum raised to recombinant fragments of csha of streptococcus gordonii dl1. the majority of s. gordonii, streptococcus sanguis and streptococcus oralis strains tested elaborated short (ca. 50-80 nm long) surface fibrils and reacted with antiserum to the amino acid repeat region of csha, demonstrating the widespread nature of csh-like proteins among t ... | 2003 | 12654102 |
| homograft valve repair for recurrent prosthetic valve endocarditis. | | 2003 | 12658218 |
| will triclosan in toothpaste select for resistant oral streptococci? | the aims of the study were to determine the in vitro sensitivity of triclosan against viridans streptococci and the impact of triclosan on the normal oral microflora. nine subjects used a triclosan-containing toothpaste for 2 weeks. saliva samples were collected on days 0 and 14 and were analyzed quantitatively. the minimum inhibitory concentrations of triclosan and of several antimicrobial agents were determined for the streptococci isolated on days 0 and 14. no major changes occurred in the no ... | 2003 | 12667241 |
| pathogenesis of adamantiades-behçet's disease. | the aetiology of adamantiades-behçet's disease remains unknown and its pathogenesis is not fully understood. linked intrinsic and extrinsic factors are thought to contribute to the development of the disease, which probably occurs by environmental triggering of a genetically determined disorder. transmission is solely vertical, indicating that the disease is not contagious. genetic factors have been investigated and a significant link of hla-b51, especially of hla-b5101, has been identified. how ... | 2003 | 12684757 |
| in vitro assay for the screening of the plaque-reducing activity of antimicrobial agents. | bacteria grown in biofilms are less susceptible to antimicrobial agents than planktonic bacteria. one of the most common biofilms in humans is dental plaque. to investigate the antimicrobial activity against dental bacteria grown in biofilms, biofilms were generated with streptococcus sanguis on hydroxyapatite disks to mimic the tooth surface. after 48 h of aerobic incubation at 37 degrees c in a continuous flow culture, a biofilm consisting of streptococcus sanguis became visible on the surface ... | 2003 | 12705173 |
| susceptibility of planktonic versus attached streptococcus sanguinis cells to chlorhexidine. | the effect of chlorhexidine (chx) on the viability of streptococcus sanguinis was investigated in a preclinical biofilm model separately on cells in the planktonic or attached life form. saliva-coated human enamel and glass slides were exposed to the streptococci suspended in sterile saliva for 30 min and 60 min in the flow chamber system. the chx exposition was performed in two parts: pretreatment of the planktonic bacteria before their attachment to enamel or glass, and treatment of bacteria a ... | 2003 | 12709846 |
| [expression of pyruvate oxidase gene sopox from streptococcus sanguis in e. coli]. | to reconstruct the expression plasmid of sopox gene for further understanding the regulation of its expression. | 2001 | 12733344 |
| pcr method is essential for detecting mycobacterium tuberculosis in oral cavity samples. | tuberculosis is a re-emerging infectious disease, and infection by mycobacterium tuberculosis has been increasing in immunocompromised hosts, including elderly persons. m. tuberculosis-infected persons may receive dental treatment. to evaluate the risk of m. tuberculosis infection in dental clinics, we examined the detection rates of m. tuberculosis in sample of mixed saliva, dental plaque, extracted teeth, caries lesions, and denture plaque by nested polymerase chain reaction (pcr). the detecti ... | 2003 | 12753466 |
| classification of oral streptococci by two-dimensional gel electrophoresis with direct activity stain for glycosyltransferases. | thirty eight strains of oral streptococci were divided into six types by two-dimensional gel electrophoresis (2-de) followed by glycosyltransferase (glt) activity stain: type 1, streptococcus mutans; type 2, streptococcus rattus; type 3, streptococcus sobrinus and streptococcus downei; type 4, streptococcus cricetus; type 5, streptococcus salivarius; and type 6, streptococcus sanguis, streptococcus oralis and streptococcus gordonii. in types 1, 2 and 5, two glucosyltransferases synthesizing wate ... | 2003 | 12753469 |
| glucan-binding proteins of the oral streptococci. | the synthesis of extracellular glucan is an integral component of the sucrose-dependent colonization of tooth surfaces by species of the mutans streptococci. in investigators' attempts to understand the mechanisms of plaque biofilm development, several glucan-binding proteins (gbps) have been discovered. some of these, the glucosyltransferases, catalyze the synthesis of glucan, whereas others, designated only as glucan-binding proteins, have affinities for different forms of glucan and contribut ... | 2003 | 12764072 |
| non-mutans streptococci in patients receiving radiotherapy in the head and neck area. | to study mutans and non-mutans streptococci in patients after radiotherapy of the head and neck. | 2003 | 12771501 |
| real-time interaction of oral streptococci with human salivary components. | oral streptococci are present in large numbers in dental plaque and several types interact with the enamel salivary pellicle to form a biofilm on tooth surfaces. the respective affinity of individual streptococci for salivary components has an influence on the etiologic properties of oral biofilm in the development of dental caries. we studied real-time biospecific interactions between oral streptococci and salivary components utilizing biosensor technology to analyze surface plasmon resonance. ... | 2003 | 12823797 |
| brain abscess due to streptococcus sanguis. | | 2003 | 12865554 |
| stress as a determinant of saliva-mediated adherence and coadherence of oral and nonoral microorganisms. | the mucosal secretory proteins, such as the salivary proteins, play a key role in the acquisition and regulation of the mucosal microflora. most notably, some microorganisms utilize the host's secretory proteins to adhere to the mucosa; a first step in colonization and infection. the secretory proteins also influence colonization by affecting the binding among microorganisms, a process denoted as coadherence. previously we reported that acute stressors cause specific changes in saliva compositio ... | 2003 | 12883111 |
| echocardiographic presentations of endocarditis, and risk factors for rupture of a sinus of valsalva in childhood. | in recent years, the diagnosis of infective endocarditis has been enhanced by the use of echocardiography. we sought, therefore, to review its effect on the management of endocarditis in children. | 2003 | 12887073 |
| 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 |
| identification of streptococcus sanguinis with a pcr-generated species-specific dna probe. | the objective of the present study was to design a pcr-generated dna probe and determine the specificity of the probe for the identification of clinical isolates of streptococcus sanguinis. to do this, we examined over 200 arbitrarily primed pcr (ap-pcr) amplicon patterns obtained with dna from clinical isolates of s. sanguinis. a 1.6-kb dna amplicon that was common to all ap-pcr profiles was extracted from agarose gels and then cloned and sequenced. a search for a similar sequence in the genban ... | 2003 | 12904342 |
| immunopathogenesis and prevention of uveitis with the behçet's disease-specific peptide linked to cholera toxin b. | | 2003 | 12918685 |
| the role of infectious agents in the pathogenesis of behçet's disease. | | 2003 | 12918686 |
| detection of microbial dna in skin lesions from patients with behçet's disease. | | 2003 | 12918687 |
| antimicrobial activity of synthetic human cap18 peptides to streptococcus sanguis isolated from patients with behçet's disease. | | 2003 | 12918689 |
| cytokine production of peripheral blood mononuclear cells stimulated with streptococcus sanguis antigen in patients with behçet's disease. | | 2003 | 12918702 |
| the antimicrobial efficacy of 'mgp' gutta-percha in vitro. | to determine whether 'mgp' gutta-percha (westport, ct, usa), a commercially available gutta-percha containing iodoform, inhibits the growth of potential endodontic pathogens. | 2003 | 12950576 |
| comparative antistreptococcal activity of photobactericidal agents. | in order to establish a comparative order of efficacy among established photosensitising compounds currently under investigation, the in vitro photobactericidal activities of six commercially available photosensitisers were investigated at equal concentration against streptococcus sanguis using a helium neon (hene) laser (632.8 nm). of the photosensitisers used, the four phenothiazinium compounds were efficient photobactericidal agents as was the protoporphyrin ix salt. however, the zinc phthalo ... | 2003 | 12962360 |
| hydrolysis of proteins and nucleic acids by lancefield group a and other streptococci. | deibel, r. h. (american meat institute foundation, chicago, ill.). hydrolysis of proteins and nucleic acids by lancefield group a and other streptococci. j. bacteriol. 86:1270-1274. 1963.-classically, group a streptococci have been considered to be nonproteolytic in spite of the observation that a proteinase is produced in broth cultures. when tested by the plate method, it was observed that 78% of 47 strains were proteolytic when the cultures were incubated anaerobically. some strains hydrolyze ... | 1963 | 14086100 |
| enthalpy of interaction between coaggregating and non-coaggregating oral bacterial pairs--a microcalorimetric study. | bacterial adhesion and coaggregation are involved in the development of oral biofilms, called dental plaque. although various techniques have already been used to study different aspects of these bacterial interactions, microcalorimetry has not yet been applied. this paper describes how isothermal reaction calorimetry can be employed to determine the enthalpy of coaggregation between two oral bacterial pairs. for most biological processes, the enthalpy tends to reach a minimum value, reflecting ... | 2003 | 14500015 |
| the effect of passive ultrasonic activation of 2% chlorhexidine or 5.25% sodium hypochlorite irrigant on residual antimicrobial activity in root canals. | ninety-four single-canal roots were prepared using the step-down technique. forty-two canals were irrigated with 2% chlorhexidine, 42 canals with 5.25% sodium hypochlorite (naocl), and 10 control canals with phosphate-buffered saline (pbs). the chlorhexidine and naocl groups were each then equally divided into a final irrigation group and a 1-min passive ultrasonic irrigation group. canals were enlarged with a parapost drill. the apical 3-5 mm was covered with nail polish. canals were rinsed wit ... | 2003 | 14503827 |
| activity of human beta-defensin 3 alone or combined with other antimicrobial agents against oral bacteria. | the in vitro activities of human beta-defensin 3 (hbd-3) alone or combined with lysozyme, metronidazole, amoxicillin, and chlorhexidine were investigated with the oral bacteria streptococcus mutans, streptococcus sanguinis, streptococcus sobrinus, lactobacillus acidophilus, actinobacillus actinomycetemcomitans, and porphyromonas gingivalis. hbd-3 showed bactericidal activity against all of the bacterial species tested. the bactericidal effect was enhanced when the peptide was used in combination ... | 2003 | 14506056 |
| [construction of plant expression plasmid of chimera sbr-ct delta a1]. | the purpose of this study is to construct plant expression plasmid containing the gene encoding chimera sbr-ct delta a1. | 2003 | 14513580 |
| [scanning electron microscope observation of morphological influence p-aminobenzoic acid (paba) on porphyromonas gingivalis]. | in order to investigate the effect of paba produced by streptococcus sanguis on microecological balance of subgingival plaque, different concentrations of paba were applied to see if it can influence the form and adherence of p. gingivalis. | 2003 | 14513582 |
| [evaluation of the cario-static effect of nidus vespae on biofilm model in vitro]. | to evaluate the nidus vespae's cario-static effect on biofilm model in vitro. | 2003 | 14513591 |
| [brain abscesses after extracranial infections of the head and neck area]. | the authors report on 20 immunocompetent patients with brain abscess after 12 cases of middle ear, seven tooth and a single frontal sinus infection. the clinical aspects, hematochemical and microbiological data, the role of imaging diagnostics (ct, mr) and the type of treatment are analysed. neurosurgery was performed on 17 patients (85%), eight of whom subsequently underwent evacuation of the primary source of infection (four mastoidectomies, two timpanoplasties, two tooth extractions). mastoid ... | 2003 | 14523535 |
| effect of increasing silver content in phosphate-based glasses on biofilms of streptococcus sanguis. | silver is a powerful antibacterial ion that may be useful for dealing with localized infections, such as periodontitis. however, the use of silver in this role could be significantly improved by the development of an effective means of delivery. phosphate-based glasses may provide a means of delivering the ions in a controlled manner. in our study, we have examined the effect of increasing silver content in phosphate-based glasses on biofilms of streptococcus sanguis. glasses of nominally the sa ... | 2003 | 14566780 |
| the acid-tolerant microbiota associated with plaque from initial caries and healthy tooth surfaces. | the intent of this study was to compare the inherent acid tolerance of bacteria in samples of dental plaque from tooth sites in subjects with and without initial caries. plaque was collected from approximal surfaces showing early enamel caries and from healthy tooth surfaces in the same subjects, as well as from enamel surfaces of caries-free individuals. in addition to plating on blood agar, the plaque samples were plated directly on non-selective solid agar medium buffered to ph 7.0, 6.0, 5.5, ... | 2003 | 14571116 |
| synergistic inhibitory effect of cationic peptides and antimicrobial agents on the growth of oral streptococci. | although chlorhexidine is one of the most efficacious antimicrobial agents used for the prevention of dental caries, side effects limit its application. the effects of gaegurin 6 (ggn6), an animal-derived cationic peptide, and its derivatives ptp6 and ptp12 on the growth of oral streptococci were investigated to assess the potential of these agents for use in the prevention of dental caries. the minimal inhibitory concentrations of the peptides for inhibition of the growth of oral streptococci ( ... | 2003 | 14571120 |
| proteome analysis of oral pathogens. | the oral environment contains diverse communities of micro-organisms including bacteria, fungi, protozoa, and viruses. studies of oral ecology have led to an appreciation of the complexity of the interactions that oral micro-organisms have with the host in both health and disease. despite this, diseases such as dental caries and periodontal diseases are still worldwide human ailments, resulting in a high level of morbidity and an economic burden to society. proteomics offers a new approach to th ... | 2003 | 14578497 |
| review article: oral ulceration--aetiopathogenesis, clinical diagnosis and management in the gastrointestinal clinic. | oral ulceration is a common complaint of patients attending out-patient clinics. the aim of this review is to provide the gastroenterologist with a differential diagnosis of oral ulceration, and a practical guide for the management of recurrent aphthous stomatitis, including topical and systemic therapy. the association of recurrent aphthous stomatitis with behçet's disease and other systemic disorders, including coeliac disease, is discussed. recent evidence concerning the immunopathogenesis of ... | 2003 | 14616160 |
| a rapid procedure to ascertain the antimicrobial efficacy of oral care formulations. | a rapid method examining the antimicrobial efficacy of oral care formulations with alamar blue, an oxidation-reduction dye with fluorescent end-points, is described. significant correlations between increasing viable plate counts of the oral bacteria actinomyces viscosus, streptococcus sanguis, streptococcus mutans and actinobacillus actinomycetemcomitans and increased alamar fluorescence were noted. metabolically active bacteria reduced alamar with the reduced dye found in the cell-free filtrat ... | 2003 | 14622343 |
| susceptibility of oral bacteria to melaleuca alternifolia (tea tree) oil in vitro. | the in vitro activity of melaleuca alternifolia (tea tree) oil against 161 isolates of oral bacteria from 15 genera was determined. minimum inhibitory concentrations (mic) and minimum bactericidal concentrations (mbc) ranged from 0.003 to 2.0% (v/v). mic90 values were 1.0% (v/v) for actinomyces spp., lactobacillus spp., streptococcus mitis and streptococcus sanguis, and 0.1% (v/v) for prevotella spp. isolates of porphyromonas, prevotella and veillonella had the lowest mics and mbcs, and isolates ... | 2003 | 14622345 |
| non-contact removal of coadhering and non-coadhering bacterial pairs from pellicle surfaces by sonic brushing and de novo adhesion. | coadhesion between oral microbial pairs is an established factor in the spatiotemporal development and prevalence of mixed-species communities in early dental plaque in vivo. this study compares removal and de novo adhesion of pairs of coadhering and non-coadhering oral actinomyces and streptococci by sonic brushing on salivary pellicles in a non-contact mode as a function of the distance between the brush and the pellicle surface in vitro. first, actinomycetes were adhered to a pellicle surface ... | 2003 | 14632680 |
| increased killing of staphylococci and streptococci by daptomycin compared with cefazolin and vancomycin in an in vitro peritoneal dialysate model. | peritoneal dialysate fluid (pdf) is a bacteriostatic medium that compromises the antibacterial activity of cell wall-active agents. by use of an in vitro static model, methicillin-resistant staphylococcus aureus (mrsa), methicillin-susceptible s. aureus (mssa), methicillin-susceptible staphylococcus epidermidis (msse), and streptococcus sanguis were exposed to daptomycin at concentrations of 10, 30, and 100 mg/liter, cefazolin at 125 mg/liter, and vancomycin at 25 mg/liter in cation-adjusted mue ... | 2003 | 14638479 |
| in vitro cariogenic potential of candida albicans. | the adherence and dissociation of candida albicans, c. tropicalis, streptococcus mutans and s. sanguis to six substrates including hydroxylapatite (hap) which exhibit various hydrophobicity, was examined by the use of a bioluminescent adenosine triphosphate (atp) assay. dissolution of hap by c. albicans or s. mutans was determined spectrophotometrically by the use of o-cresolphthalein complexone. in the adherence of c. tropicalis, s. mutans and s. sanguis, the amount of adherent cells correlated ... | 2003 | 14641620 |
| [evaluation of in vitro cario-static effect of galla chinensis with biofilm model]. | to evaluate the in vitro cario-static effect of galla chinesis with biofilm model. | 2003 | 14650999 |
| [arbitrary primed polymerase chain reaction for the genotypic identification of streptococcus sanguis group]. | to find out an ideal method used in identification of streptococcus sanguis group (ssg) strains by arbitrary primed polymerase chain reaction (ap-pcr). | 2003 | 14661456 |
| reduction of viable bacteria in dentinal tubules treated with clindamycin or tetracycline. | we sought to evaluate and compare the antibacterial effect of clindamycin and tetracycline in bovine dentinal tubules. | 2003 | 14676768 |
| in vitro antibacterial activity of germisol on bacterial strains isolated from dental patients. | | 2003 | 14699905 |
| role of oral bacterial flora in calcific aortic stenosis: an animal model. | calcific aortic stenosis is a major public health problem in the united states. the mechanism of calcification remains unclear. the hypothesis that low grade chronic or recurrent bacterial endocarditis with specific calcifiable bacteria is a cause of calcification of the aortic valves was investigated using an animal model. such bacteria are typically present as part of the normal human oral flora. | 2004 | 14759434 |
| the anti-adherence effect of piper betle and psidium guajava extracts on the adhesion of early settlers in dental plaque to saliva-coated glass surfaces. | the aqueous extracts of piper betle and psidium guajava were prepared and tested for their anti-adherence effect on the adhesion of early plaque settlers (strep. mitis, strep. sanguinis and actinomyces sp.). the saliva-coated glass surfaces were used to simulate the pellicle-coated enamel surface in the oral cavity. our results showed that the anti-adherence activities of piper betle and psidium guajava extracts towards the bacteria were different between the bacterial species. psidium guajava w ... | 2003 | 14763515 |
| distribution of cells between solid/liquid and liquid/liquid interfaces. | the use of aqueous two-phase systems (atpss) and each system's individual phase-forming species to prevent streptococcus sanguis attachment onto hydroxyapatite discs was explored. the strategy that we followed was to attach the cells to a solid surface in the presence of an additional interface. conditions under which, simultaneously, the phase-forming species form two phases and the cells proliferate were identified. growth curves were constructed in the presence of various polymers and salts c ... | 2004 | 14763855 |
| influence of weight on removal of co-adhering bacteria from salivary pellicles by different modes of brushing. | this study compared removal of pairs of co-adhering and non-co-adhering oral actinomyces and streptococci from salivary pellicles by manual, rotating/oscillating electric and sonic toothbrushes, applying weights up to 240 g. first, actinomyces were allowed to adhere to a pellicle in a parallel plate flow chamber, after which streptococci suspended in saliva were perfused through the chamber at 33 degrees c. on average, 34-39% of the adhering bacteria were adhering as single organisms. for co-adh ... | 2004 | 14767163 |
| effectiveness of sodium hypochlorite in preventing inoculation of periapical tissues with contaminated patency files. | the aim of this study was to analyze the effectiveness of 5.25% sodium hypochlorite (naoci) in preventing inoculation of periapical tissues with contaminated patency files. twenty-eight extracted human permanent teeth with single canals were used in the study. group i teeth were filled with naocl, and #15 stainless steel files contaminated with streptococcus sanguis (atcc #10556) were allowed to pass through the naoci into the culture medium. the teeth in group ii were also filled with naocl, bu ... | 2004 | 14977304 |
| [the role of dead bacteria in streptococcus sanguis biofilm reformation]. | to investigate the role of dead bacteria in streptococcus sanguis biofilm reformation. | 2002 | 14983332 |
| [the in vitro study on polistes mandarinus' effects on cariogenic bacteria]. | to study the role of polistes mandarinus on the growth,acid generation and water insoluble glucan(wig) production of streptococcus mutans, streptococcus sanguis and actinomyces viscosus as a preparation for screening an effective agent ot medicate the balance of oral microflora. | 2002 | 14983338 |
| biofilm-specific surface properties and protein expression in oral streptococcus sanguis. | oral streptococci are primary colonisers of the tooth surface and are abundant in dental plaque biofilms. bacteria growing in these relatively dense, surface-associated communities are phenotypically quite distinct from their planktonic counterparts. the purpose of the present study was to develop a method to investigate biofilm-specific surface protein expression by streptococcus sanguis to help provide a better understanding of the critical events in plaque development. | 2004 | 15003548 |