Publications
| Title | Abstract | Year Filter | PMID(sorted descending) Filter |
|---|
| selection of oral microbial adhesion antagonists using biotinylated streptococcus sanguis and a human mixed oral microflora. | a microtitre assay has been developed using hydroxyapatite-coated wells and streptococcus sanguis nctc 10904 at 10(7) cells per ml. a number of models representing toothpaste and mouthwash usage were adopted to detect the anti-adherent efficacy of a polyvinylmethylether maleic acid copolymer (pvm/ma), polyoxypropylene/polyoxyethylene block copolymer (po/eo), two casein-derived peptides and selected silicones. the results not only confirmed the anti-adherence property of the selected components b ... | 2001 | 11163320 |
| commercial preparations of lipoteichoic acid contain endotoxin that contributes to activation of mouse macrophages in vitro. | lipoteichoic acids (lta), cell wall components of gram-positive bacteria, have been reported to induce various inflammatory mediators and to play a key role in gram-positive-microbe-mediated septic shock. in a large number of these studies, investigators used commercially available lta purified from a variety of gram-positive bacteria, including staphylococcus aureus, bacillus subtilis, and streptococcus sanguis. we report here that, although these commercially available lta could be readily sho ... | 2001 | 11159964 |
| the clinical and microbiological effects of systemic ornidazole in sites with and without subgingival debridement in early-onset periodontitis patients. | the purpose of this study was to evaluate the clinical and microbiological effects of systemic ornidazole (orn) in sites with or without subgingival debridement in early-onset periodontitis (eop) patients. | 2000 | 11156043 |
| profile of subgingival microbiota in children with mixed dentition. | a diversity of microbial species has been detected in children's oral flora at an early age. to investigate the composition of the subgingival microbiota of different groups of teeth in children with mixed dentition, 40 systemically healthy children, aged 7-8 years, randomly chosen, were examined. subgingival plaque samples were taken from the mesiobuccal sites of 21, 41, 16 and 36 permanent teeth and 53, 73, 64 and 84 deciduous teeth. the samples were cultured for bacterial isolation anaerobica ... | 2000 | 11155173 |
| porphyromonas gingivalis platelet aggregation activity: outer membrane vesicles are potent activators of murine platelets. | recent evidence has established an association between chronic periodontitis and cardiovascular disease. periodontitis is a chronic inflammatory disease caused by a small group of gram-negative bacteria, of which porphyromonas gingivalis is considered an important causative agent. it has been proposed that dental plaque bacteria and their products can disseminate into the bloodstream from the site of infection and promote thromboembolic events associated with atherosclerosis and myocardial infar ... | 2000 | 11154438 |
| the oral microbiota of children undergoing liver transplantation. | this study investigated the oral microbiota of children undergoing liver transplantation. oral swabs were taken using a standardized procedure from 27 children before liver transplantation and at 3 and 100 days post-transplantation and from 27 healthy controls at baseline and 90 days. viridans streptococci, yeasts, staphylococci, enterococci and enterobacteriaceae were enumerated and identified using conventional techniques. the oral microbiota of the patients changed significantly immediately p ... | 2000 | 11154404 |
| [bact-alert system for hemocultures: evaluation of terminal subcultures]. | few laboratory microbiological procedures are as important as the isolation of microorganisms from blood. to evaluate the usefulness of the terminal subcultures, 5669 blood cultures giving negative results after 7 days of incubation in the bact/alert system (organon teknika) were studied. bottles were distributed as follows: 1562 adult aerobic bottles, 119 adult anaerobic bottles, 3960 pediatric bottles and 28 fan bottles. from 5669 blood cultures, 10 subcultures that yielded growth had not been ... | 2000 | 11149151 |
| the galu gene of streptococcus pneumoniae that codes for a udp-glucose pyrophosphorylase is highly polymorphic and suitable for molecular typing and phylogenetic studies. | the enzyme utp-glucose-1-phosphate uridylyltransferase (udp-glucose pyrophosphorylase, udpg:pp) is synthesized by practically all organisms, although prokaryotic udpg:pps are evolutionarily unrelated to the eukaryotic counterparts. the primary structure of prokaryotic udpg:pps is well conserved, although little information exists on the polymorphism of the genes coding for these enzymes. it has been reported that the galu gene encoding the streptococcus pneumoniae udpg:pp is absolutely required ... | 2000 | 11137293 |
| postantibiotic effects and postantibiotic sub-mic effects of amoxicillin on streptococcus gordonii and streptococcus sanguis. | amoxicillin is one of the most frequently recommended antibiotics for prophylaxis of infective endocarditis in dental/oral procedures. in this study, the postantibiotic effect (pae), postantibiotic sub-mic (pasme) and sub-mic effect (sme) of amoxicillin on oral streptococci, streptococcus gordonii and streptococcus sanguis, which are two of the major etiological agents in infective endocarditis, were investigated. the pae was induced by 10 x mic of amoxicillin for 2 h and the antibiotic was elim ... | 2000 | 11128556 |
| diversity and contribution of the intestinal bacterial community to the development of musca domestica (diptera: muscidae) larvae. | the bacterial diversity in the intestinal tract of musca domestica l. was examined in larvae collected from turkey bedding and corn silage. aerobic culturing yielded 25 bacterial species, including 11 from larvae collected from turkey bedding and 14 from larvae collected from corn silage. providencia rettgeri (hadley, elkins & caldwell) was the only species common to both environments. two mammalian pathogens, yersinia pseudotuberculosis (pfeiffer) and ochrobactrum anthropi (holmes), were isolat ... | 2000 | 11126551 |
| properties of streptococcus sanguinis glucans formed under various conditions. | the aim of our study was to determine whether the structure of glucans formed by glucosyltransferase from streptococcus sanguinis (gtfss) on a surface differ from those formed in solution and to explore the effects of antiserum to gtfs, control normal rabbit serum, starch hydrolysates (sth) and dextran on s. sanguinis (gtfss) glucan. linkage analyses showed that solution-formed glucans are predominantly alpha-1,6-linked and have a small amount of alpha-1,3-linked glucose. surface-formed glucans ... | 2001 | 11125200 |
| dental plaque formation. | dental plaque is a complex biofilm that accumulates on the hard tissues (teeth) in the oral cavity. although over 500 bacterial species comprise plaque, colonization follows a regimented pattern with adhesion of initial colonizers to the enamel salivary pellicle followed by secondary colonization through interbacterial adhesion. a variety of adhesins and molecular interactions underlie these adhesive interactions and contribute to plaque development and ultimately to diseases such as caries and ... | 2000 | 11113379 |
| aneurysm of the anterior leaflet of the mitral valve secondary to aortic valve endocarditis. | aneurysm of the anterior mitral leaflet is a rare complication of infective aortic valve endocarditis, the natural evolution of which is generally its rupture, with subsequent acute and severe mitral regurgitation. its presence cannot be recognized with transthoracic echocardiography and even in surgery. we describe a 78-year-old man with aortic valve endocarditis, in whom transesophageal echocardiography was essential for the diagnosis of this complication, its therapeutic management, and the p ... | 2000 | 11093109 |
| strain-related acid production by oral streptococci. | acid production, in particular at low ph, is thought to be an important ecological determinant in dental caries. the aim of the present study was to determine the acid producing capability at different ph levels of 47 streptococcal strains, representing 9 species, isolated from human dental plaque. the bacteria were grown until mid log-phase under anaerobic conditions and acid production was measured in a ph-stat system at ph 7.0, 6.0, 5.5 and 5.0. at all ph values, the mean velocity of acid pro ... | 2000 | 11093023 |
| similarity of bacteriocin activity profiles of mutans streptococci within the family when the children acquire the strains after the age of 5. | it has been shown that there is a window of infectivity for mutans streptococci between the ages of 19 and 31 months, when many children acquire mutans streptococci transmitted from their mothers. part of the children that escape this window acquire mutans streptococci at a later age. in this group, maternal transmission is expected to be less prevalent. the present study compared the bacteriocin activity profiles of mutans streptococci isolated from mothers, fathers and children when the childr ... | 2000 | 11093022 |
| [general syndrome and fever]. | 2000 | 11083959 | |
| images in cardiology: silent patent ductus arteriosus endarteritis. | 2000 | 11083739 | |
| fractional inhibitory concentration index of combinations of antibacterial agents against cariogenic organisms. | to examine the inhibitory effects between paired combinations of four antibacterial agents that have been investigated in dentistry against six bacteria associated with dentinal caries. | 2000 | 11082524 |
| sensitization of actinomyces naeslundii and streptococcus sanguis in biofilms and suspensions to acid damage by fluoride and other weak acids. | fluoride and other weak acids, such as benzoate, indomethacin, salicylate and sorbate, were found to be sensitizers for acid killing of cells of actinomyces naeslundii atcc 19246 and streptococcus sanguis nctc 10904 in suspensions or in mono-organism biofilms on glass slides. these bacteria are among the more acid-sensitive organisms from dental plaque and were killed when acidified to ph values between 3.5 and 4.0. biofilm cells were more resistant than cells in suspensions, especially in terms ... | 2000 | 11081793 |
| fever and pain over the right hypochondrium. liver abscess as the presenting form of stromal intestinal tumor. | 2000 | 11076187 | |
| competition for glucose between candida albicans and oral bacteria grown in mixed culture in a chemostat. | the competition for glucose as a growth-limiting substrate between candida albicans and a mixed community of oral bacteria was investigated. a chemostat was operated under glucose-limiting and glucose excess conditions at a dilution rate of 0.05/h. a mixed population of oral bacteria was established and after a steady state had been reached the chemostat was inoculated with c. albicans. seven bacterial species streptococcus sanguis, s. sobrinus, s. mitis, lactobacillus casei, veillonella dispar, ... | 2000 | 11073150 |
| automated immunofluorescence for enumeration of selected taxa in supragingival dental plaque. | the present study investigated a recently developed automated image analysis technique for its applicability to the enumeration of selected bacteria in supragingival dental plaque. following initial calibration, the system is capable to count fluorescence-labeled target cells in up to 48 samples without user interference. test samples contained a characteristic mixture of planktonic bacteria, small almost planar bacterial aggregates, and large, virtually indisruptable clumps with cells from mult ... | 2000 | 11037755 |
| microbial composition of supra- and subgingival plaque in subjects with adult periodontitis. | the purpose of the present study was to compare and relate the microbial composition of supra and subgingival plaque in 23 adult periodontitis subjects (mean age 51 +/- 14 years). | 2000 | 11034118 |
| effects of apis mellifera propolis on the activities of streptococcal glucosyltransferases in solution and adsorbed onto saliva-coated hydroxyapatite. | propolis, a resinous hive product collected by apis mellifera bees, has been used for thousands of years in folk medicine. ethanolic extracts of propolis (eep) have been shown to inhibit the activity of a mixture of crude glucosyltransferase (gtf) enzymes in solution. these enzymes synthesize glucans from sucrose, which are important for the formation of pathogenic dental plaque. in the present study, the effects of propolis from two different regions of brazil on the activity of separate, purif ... | 2000 | 11014909 |
| effects of antibodies to glucosyltransferase on soluble and insolubilized enzymes. | previous studies have shown that glucosyltransferase enzymes (gtfs) of streptococcus mutans adsorbed to saliva coated hydroxyapatite (sha) have distinct properties from the same enzymes in solution. the purpose of the present study was to determine the effects on enzyme activity of polyclonal antibodies raised to gtfs in a soluble form and bound to sha. | 2000 | 11002411 |
| presence of bacterial 16s ribosomal rna gene segments in human intestinal lymph follicles. | there is currently no information regarding microbial agents inside the intestinal lymph follicles. | 2000 | 10994621 |
| antibody-targeted lethal photosensitization of porphyromonas gingivalis. | we have previously demonstrated that porphyromonas gingivalis is susceptible to killing by toluidine blue o (tbo) when irradiated with light from a helium-neon (hene) laser. the aim of this study was to determine whether a tbo-antibody conjugate (ab-tbo) could be used to specifically target p. gingivalis to lethal photosensitization in the presence of streptococcus sanguis or human gingival fibroblasts (hgfs). when a mixture of p. gingivalis and s. sanguis was exposed to 4 microg of tbo/ml and i ... | 2000 | 10991833 |
| trovafloxacin treatment of viridans group streptococcus experimental endocarditis. | the activity of trovafloxacin was compared with those of vancomycin and penicillin in a model of streptococcus sanguis species group (trovafloxacin mic, 0.125 microg/ml) and streptococcus mitis species group (trovafloxacin mic, 0.125 microg/ml) experimental endocarditis. rabbits with catheter-induced aortic valve vegetations were given no treatment, trovafloxacin at 15 mg/kg of body weight three times a day (t.i.d.), vancomycin at 15 mg/kg twice a day, or penicillin at 1. 2 x 10(6) iu t.i.d. aft ... | 2000 | 10952616 |
| taxonomic study of "tufted mitior" strains of streptococci (streptococcus sanguinis biotype 11); recognition of a new genospecies. | the taxonomic position of tufted strains of streptococci, phenotypically resembling streptococcus mitis and previously referred to as 'tufted mitior' was investigated. by 16s rrna sequence analysis, it was clear that the "tufted mitior" strains belonged to the mitis group of species within the genus streptococcus. it was confirmed that these strains were taxonomically independent at the species level, sharing less than 43%, dna-dna similarity with all established species of the mitis group. howe ... | 2000 | 10930077 |
| effect of the interleukin-1 genotype on monocyte il-1beta expression in subjects with adult periodontitis. | an association has been reported between polymorphisms in the genes encoding il-1alpha (-889) and il-1beta (+3953) (periodontitis susceptibility trait, pst), and an increased severity of periodontitis (18). the il-1beta polymorphism was reported to correlate with increased il-1beta expression by monocytes in response to bacterial stimulants. in the present study, we determined if pst positive subjects with periodontitis exhibit elevated production of il-1beta, compared to pst negative periodonti ... | 2000 | 10929872 |
| colorimetric indicators of microbial contamination in corneal preservation medium. | to compare acid-base and oxidation-reduction indicators and to investigate the effect of buffer and temperature on the colorimetric detection of microbial growth in corneal preservation media. | 2000 | 10928770 |
| role of monocytes in experimental staphylococcus aureus endocarditis. | in the pathogenesis of bacterial endocarditis (be), the clotting system plays a cardinal role in the formation and maintenance of the endocardial vegetations. the extrinsic pathway is involved in the activation of the coagulation pathway with tissue factor (tf) as the key protein. staphylococcus aureus is a frequently isolated bacterium from patients with be. we therefore investigated whether s. aureus can induce tf activity (tfa) on fibrin-adherent monocytes, used as an in vitro model of be. we ... | 2000 | 10899897 |
| [meningitis after spinal anesthesia]. | the occurrence of meningitis after spinal anaesthesia is a very rare event. we report a case of streptococcus sanguis meningitis following spinal anaesthesia for orthopaedic material removal. the presence of gram positive cocci (streptococcus sanguis) in the cerebrospinal fluid was in favour of an exogenous contamination, originating either from the patient's skin or the anaesthesiologist's oropharynx. the outcome was uneventful. the responsibility of the latter can result in legal consequences. ... | 2000 | 10874434 |
| studies concerning the glucosyltransferase of streptococcus sanguis. | we have shown in previous studies that the glucosyltransferase (gtf) enzymes of streptococcus mutans have distinct properties when adsorbed to a surface. in the present study, we compared the activity of gtf from streptococcus sanguis, designated gtfss, in solution and on the surface of saliva-coated hydroxyapatite (sha) beads, and determined the ability of its product glucan to support the adherence of oral microorganisms. gtf from s. sanguis 804 nctc 10904 was purified from culture supernatant ... | 2000 | 10867431 |
| ib-367, a protegrin peptide with in vitro and in vivo activities against the microflora associated with oral mucositis. | although the microflora associated with oral mucositis initiated by cytotoxic therapy is not well characterized, several studies suggest that reduction of the microbial load in the oral cavity has some clinical benefit. the mics of ib-367, a synthetic protegrin analog, ranged from 0.13 to 64 microgram/ml for gram-positive bacteria (streptococcus mitis, streptococcus sanguis, streptococcus salivarius, and staphylococcus aureus) and from 0.06 to 8 microgram/ml for gram-negative species (klebsiella ... | 2000 | 10858334 |
| natural history of streptococcus sanguinis in the oral cavity of infants: evidence for a discrete window of infectivity. | the heterogeneous group of oral bacteria within the sanguinis (sanguis) streptococci comprise members of the indigenous biota of the human oral cavity. while the association of streptococcus sanguinis with bacterial endocarditis is well described in the literature, s. sanguinis is thought to play a benign, if not a beneficial, role in the oral cavity. little is known, however, about the natural history of s. sanguinis and its specific relationship with other oral bacteria. as part of a longitudi ... | 2000 | 10858217 |
| differential patterns of apoptosis in resolving and nonresolving bacterial pneumonia. | infection with either streptococcus sanguis or streptococcus pneumoniae type 25 causes acute pneumonitis in rats. pneumonia caused by s. sanguis resolves over the course of 8 d, whereas pneumonia caused by s. pneumoniae type 25 progresses to fibrosis. to examine the role of apoptosis in these models, we performed assays with the terminal deoxynucleotidyltransferase-uridine nucleotide end-labeling technique on tissue sections from rat lungs at various times, and quantified the results with image ... | 2000 | 10852786 |
| effect of an essential oil-containing antiseptic mouthrinse on induction of platelet aggregation by oral bacteria in vitro. | with an increasing body of data suggesting an association between periodontitis and cardiovascular disease, studies have been conducted to elucidate potential mechanisms by which oral bacteria might exert systemic effects. 2 oral bacteria, streptococcus sanguis and porphyromonas gingivalis, have been shown to induce platelet aggregation in vitro. this study was conducted to determine the effect of treatment with an essential oil mouthrinse (listerine antiseptic) on the platelet-aggregating activ ... | 2000 | 10847543 |
| comparison of gyra and parc mutations and resistance levels among fluoroquinolone-resistant isolates and laboratory-derived mutants of oral streptococci. | laboratory-derived fluoroquinolone-resistant mutants were obtained by serial passage of streptococcus sanguis and streptococcus anginosus isolates on agar containing increasing concentrations of old and new fluoroquinolones, ofloxacin and du-6859a, respectively. sequencing of an s. sanguis isolate exposed to du-6859a showed that resistance was associated with two mutations in the quinolone resistance determining region (qrdr) of the gyra gene (ser83-->phe; glu87-->lys), and with a mutation in th ... | 2000 | 10837428 |
| profile of subgingival microbiota in children with primary dentition. | eruption of primary teeth has a great influence on the oral environment by providing suitable niches for bacterial colonization. the aim of the study was to investigate the composition of the subgingival microbiota of primary incisors, canines and molars in 40 systemically healthy children aged 4-5 yr, chosen randomly. subgingival plaque samples were taken from the mesiobuccal sites of primary incisors (61, 81), canines (53, 73) and molars (64, 84). the samples were cultured for bacterial isolat ... | 2000 | 10791707 |
| purification, characterization, and molecular analysis of the gene encoding glucosyltransferase from streptococcus oralis. | streptococcus oralis is a member of the oral streptococcal family and an early-colonizing microorganism in the oral cavity of humans. s. oralis is known to produce glucosyltransferase (gtase), which synthesizes glucans from sucrose. the enzyme was purified chromatographically from a culture supernatant of s. oralis atcc 10557. the purified enzyme, gtase-r, had a molecular mass of 173 kda and a pi of 6.3. this enzyme mainly synthesized water-soluble glucans with no primer dependency. the addition ... | 2000 | 10768934 |
| investigation of bacteremia following orthodontic debanding. | the aim of this study was to investigate the prevalence of bacteremia after orthodontic debanding and debonding. the study group comprised 30 patients (10 men, 20 women). all were treated using the edgewise technique. patients with acceptable oral hygiene and fixed appliances in both jaws were included in the study group. blood samples were obtained using a strict aseptic technique before and after removal of bands and brackets. a 6.6% bacteremia prevalence was observed in both preoperative and ... | 2000 | 10730670 |
| namibian chewing stick, diospyros lycioides, contains antibacterial compounds against oral pathogens. | the twigs of diospyros lycioides, a plant commonly known as "muthala", are frequently used as chewing sticks for the cleaning of teeth by rural and urban people in namibia. preliminary studies showed that a methanol extract of d. lycioides inhibited growth of selected oral pathogens. subsequent bioassay-guided fractionation led to the isolation of four novel bioactive naphthalene glycosides, diospyrosides a, b, c, and d (1-4), and two known bioactive naphthoquinones, juglone (5) and 7-methyljugl ... | 2000 | 10725172 |
| salivary film expresses a complex, macromolecular binding site for streptococcus sanguis. | teeth in the oral cavity are coated with a salivary film or pellicle, which lacks apparent intermolecular organization. this heterogeneous film facilitates binding of early commensal colonizing bacteria, including streptococcus sanguis. to test the hypothesis that sufficient intermolecular organization exists in salivary films to form binding sites for s. sanguis, an in vitro model of saliva-coated teeth was probed with murine anti-idiotypical monoclonal antibodies (mab2, anti-ids). the anti-ids ... | 2000 | 10722745 |
| [lumbosacral spondylodiscitis as the first manifestation of subacute bacterial endocarditis caused by streptococcus sanguis type ii]. | 2000 | 10721582 | |
| in vitro antimicrobial activity of propolis and arnica montana against oral pathogens. | arnica and propolis have been used for thousands of years in folk medicine for several purposes. they possess several biological activities such as anti-inflammatory, antifungal, antiviral and tissue regenerative, among others. although the antibacterial activity of propolis has already been demonstrated, very few studies have been done on bacteria of clinical relevance in dentistry. also, the antimicrobial activity of arnica has not been extensively investigated. therefore the aim here was to e ... | 2000 | 10716618 |
| co-aggregation as a virulent factor of streptococcus sanguis isolated from infective endocarditis. | the pathogenicity of strains of the streptococcus sanguis group, isolated from infective endcarditis, was studied by measuring the development of subcutaneous abscesses in mice after infection with s. sanguis and actinomyces viscosus either singly or as co-aggregated pairs. the pathogenicity of the co-aggregates was also examined in various viable combinations of the two bacterial species. more abscesses were formed by a. viscosus than the s. sanguis group including clinical isolates. abscess fo ... | 1999 | 10692836 |
| effects of organic acid anions on growth, glycolysis, and intracellular ph of oral streptococci. | oral streptococci produce large quantities of organic acids as the end-products of carbohydrate fermentation. in an approach to determine if oral streptococci exhibit differential sensitivities to organic acid anions, we determined the effects of formate, lactate, and acetate on intracellular ph maintenance, glycolysis, and growth of streptococcus mutans and streptococcus sanguis. growth was determined as maximum culture optical density in the presence of the organic acid anions at ph 7.1, 6.7, ... | 2000 | 10690666 |
| 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 |
| 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 |
| synthesis, microbicidal activity, and solution structure of the dodecapeptide from bovine neutrophils. | the dodecapepetide sequence r-l-c-r-i-v-v-i-r-v-c-r with a disulfide bridge between the cysteine residues found in bovine neutrophils was synthesized by solid-phase procedures. its antimicrobial activity against oral microorganisms such as actinobacillus actinomycetemcomitans, porphyromonas gingivalis, streptococcus mutans, and streptococcus gordonii was examined, and its structural features were examined by cd and determined by two-dimensional (2d) nmr. the strains p. gingivalis (w50 and 381), ... | 2000 | 10685049 |
| [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 |
| adhesion of candida albicans to oral streptococci is promoted by selective adsorption of salivary proteins to the streptococcal cell surface. | adhesion of candida albicans to saliva-coated surfaces is an important early step in the colonization of the oral cavity. c. albicans cells also adhere to several species of oral streptococci including streptococcus gordonii, streptococcus oralis and streptococcus sanguinis in what are believed to be multi-modal interactions. it is now demonstrated that incubation of streptococcal cells of these species with human parotid saliva further promotes the adhesion of c. albicans cells by up to 2-3-fol ... | 2000 | 10658650 |
| 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 |
| comparative in vitro activity of moxifloxacin against gram-positive clinical isolates. | the in vitro activity of moxifloxacin was compared with that of 15 antibacterial agents against 513 gram-positive microorganisms. the mic(90) (mg/l) of moxifloxacin was 0.06 for quinolone-susceptible staphylococcus aureus and staphylococcus epidermidis, 0.12 for streptococcus pyogenes and streptococcus agalactiae; 0.25 for streptococcus pneumoniae, streptococcus mitis, streptococcus bovis, streptococcus anginosus and actinomyces pyogenes; 0.5 for streptococcus sanguis and listeria monocytogenes, ... | 2000 | 10629010 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| infective endocarditis: an epidemiological review of 128 episodes. | the objective was to determine the current epidemiology of infective endocarditis. | 1999 | 10342647 |
| 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 |
| an assessment of microbial coronal leakage in teeth root filled with gutta-percha and three different sealers. | the aim of this in vitro study was to determine the effect of three different root canal sealers on the bacterial penetration of obturated root canals. eighty extracted human teeth with straight, single root canals were prepared using the modified double-flared technique with balanced force under copious irrigation until the master apical file was size 40. the teeth were divided randomly into experimental groups (60 teeth) and control groups (20 teeth). twenty experimental teeth each were obtura ... | 1996 | 10332239 |
| 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 |
| 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 |
| 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 |
| 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 |
| cutaneous vasculitis and collapse. | 1998 | 10197203 | |
| [analysis of serum antibodies to alpha-streptococci in patients with tonsil-related pustulosis palmaris et plantaris]. | to determine the systemic immune response to alpha-streptococci (str. sanguis, str. salivarius and str. mitis) and beta streptococcus (str. pyogenes t12) in patients with tonsil related pustulosis palmaris et plantaris (ppp), we measured serum antibody levels to whole cell body antigens of streptococcus (str.) sanguis, str. salivarius, str. mitis or str. pyogenes by enzyme-linked immunosorbent assay (elisa). the serum igg antibody levels to alpha-streptococci, str. sanguis and str. salivarius we ... | 1999 | 10191624 |
| cumulative correlations of lysozyme, lactoferrin, peroxidase, s-iga, amylase, and total protein concentrations with adherence of oral viridans streptococci to microplates coated with human saliva. | redundancy refers to the observation that many salivary proteins exhibit similar properties in vitro. it is possible that bacterial adherence to salivary pellicle occurs as a cumulative effect of multiple proteins. this study determined the joint and individual contributions of salivary amylase, s-iga, lysozyme, salivary peroxidase, lactoferrin, and total protein concentrations to adherence by oral viridans streptococci in microplates coated with whole saliva from 123 persons. strains used were: ... | 1999 | 10096451 |
| 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 |
| 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 |
| lipoteichoic acid acts as an antagonist and an agonist of lipopolysaccharide on human gingival fibroblasts and monocytes in a cd14-dependent manner. | cd14 has been implicated as a receptor of lipoteichoic acid (lta) and other bacterial components as well as lipopolysaccharide (lps). since the structures of ltas from various gram-positive bacteria are heterogeneous, we analyzed the effects of ltas on the secretion of interleukin-8 (il-8) by high- and low-cd14-expressing (cd14(high) and cd14(low)) human gingival fibroblasts (hgf). while bacillus subtilis lta had an il-8-inducing effect on cd14(high) hgf which was considerably weaker than that o ... | 1999 | 10084995 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |