the physiological and genetic diversity of bovine streptococcus bovis strains(1).laboratory streptococcus bovis strains and isolates obtained from a steer fed increasing amounts of grain had similar growth characteristics, but they differed in their sensitivity to 2-deoxyglucose (2dg), a non-metabolizable glucose analog. the addition of 2dg decreased both growth rate (0.92+/-0.34 h(-1)) and growth yield (ranging from 25 to 63%), but these differences could not be correlated with diet. however, isolates from a steer fed a 90% grain diet were more prone to 2dg-dependent lysis ...200111248389
16s ribosomal dna sequence analysis distinguishes biotypes of streptococcus bovis: streptococcus bovis biotype ii/2 is a separate genospecies and the predominant clinical isolate in adult males.we characterized 22 human clinical strains of streptococcus bovis by genotypic (16s rrna gene sequence analysis [microseq]; applied biosystems, foster city, calif.) and phenotypic (api 20 strep and rapid id32 strep systems (biomerieux vitek, hazelton, mo.) methods. the strains, isolated from blood, cerebrospinal fluid (csf), and urine, formed two distinct 16s ribosomal dna sequence clusters. three strains which were associated with endocarditis urinary tract infection (uti), and sepsis clustered ...200111283085
effect of hydrolysable and condensed tannins on growth, morphology and metabolism of streptococcus gallolyticus (s. caprinus) and streptococcus bovis.streptococcus gallolyticus (s. caprinus) was resistant in vitro to at least 7% (w/v) tannic acid and 4% (w/v) acacia condensed tannin, levels 10-fold greater than those tolerated by s. bovis. growth of s. gallolyticus in liquid medium was characterized by a lag period which increased, and a growth rate which decreased, with increasing tannin concentration. s. gallolyticus was also more tolerant to the presence of simple phenolic acid monomers than was s. bovis, but the lag period was still conce ...200111283298
definite streptococcus bovis endocarditis: characteristics in 20 determine the specific characteristics of streptococcus bovis infective endocarditis (ie) by reviewing our own experience of s. bovis ie.200111284936
[mitral endocarditis with valvular perforation and severe mitral regurgitation]. 200111293881
a first case of streptococcus bovis bacteremia and peritonitis from endometrial cancer origin.the most important clinical infections caused by streptococcus bovis are bacteremia and endocarditis. usually, streptococcus bovis bacteremia has been described in association with bowel pathology.200111301947
aggregation substance-mediated adherence of enterococcus faecalis to immobilized extracellular matrix proteins.aggregation substance (as) of enterococcus faecalis (e. faecalis), a sex pheromone plasmid encoded cell surface protein, mediates the formation of bacterial aggregates, thereby promoting plasmid transfer. the influence of pad1-encoded as, asa1, on binding to immobilized extracellular matrix proteins was studied. the presence of as increased enterococcal adherence to fibronectin more than eight-fold, to thrombospondin more than four-fold, to vitronectin more than three-fold, and to collagen type ...200111312614
diet-dependent shifts in the bacterial population of the rumen revealed with real-time pcr.a set of pcr primers was designed and validated for specific detection and quantification of prevotella ruminicola, prevotella albensis, prevotella bryantii, fibrobacter succinogenes, selenomonas ruminantium-mitsuokella multiacida, streptococcus bovis, ruminococcus flavefaciens, ruminobacter amylophilus, eubacterium ruminantium, treponema bryantii, succinivibrio dextrinosolvens, and anaerovibrio lipolytica. by using these primers and the real-time pcr technique, the corresponding species in the ...200111375193
the replicon of the cryptic plasmid psbo1 isolated from streptococcus bovis jb1.the cryptic plasmid psbo1 (3904 bp) was isolated from streptococcus bovis jb1. psbo1 contained an open reading frame (orf) that is homologous to sequences encoding the replication protein (rep) in pefc1 (isolated from enterococcus faecalis), psk639 (staphylococcus epidermidis), pla103 (lactobacillus acidophilus), and pucl287 (tetragenococcus halophila). in addition, four 22-bp direct repeats (drs) were located upstream of the putative replication gene (rep) of psbo1. recombinant plasmids (psbe10 ...200111375657
in vitro activity of gemifloxacin (sb-265805) compared to eleven other antimicrobial agents against streptococcal isolates, excluding streptococcus pneumoniae.the purpose of the study presented here was to determine the in vitro activity of gemifloxacin compared with that of 11 other antimicrobial agents (5 of them quinolones) against 400 isolates of beta-haemolytic and viridans group streptococci. the minimum inhibitory concentration values for gemifloxacin against 90% of the streptococci tested were as follows: lancefield groups a, c and g, 0.06 microg/ml; lancefield group b, streptococcus mitis, streptococcus mutans and streptococcus bovis, 0.125 m ...200111399019
optimisation of the prevention and treatment of bacterial endocarditis.this paper reviews currently established guidelines for the prevention and treatment of bacterial endocarditis. endocarditis remains a life-threatening disease with substantial morbidity and mortality. primary prevention of endocarditis, whenever possible, is therefore very important. in an individual with endocarditis, rapid diagnosis and effective treatment are essential to good patient outcome. the guidelines discussed here are largely based on those issued by the american heart association. ...200111419916
dextran acceptor reaction of streptococcus sobrinus glucosyltransferase gtf-i as revealed by using uniformly 13c-labeled sucrose.a sucrose glucosyltransferase gtf-i from cariogenic streptococcus sobrinus transferred the uniformly 13c-labeled glucosyl residue ([u-(13)c]glc) from [u-(13)c]sucrose to exogenous dextran t500 at the non-reducing-end, mostly by alpha-(1-->6) linkages and partially by alpha-(1-->3) linkages, as revealed by the 13c-(13)c nmr coupling pattern. with increasing amounts of [u-(13)c]sucrose, transfer of [u-(13)c]glc to the alpha-(1-->3)-linked chain became predominant without increase in the number of ...200111423107
[agranulocytosis and epileptic seizure during prolonged ceftriaxone treatment]. 200111431585
restriction and modification systems of ruminal bacteria.a high frequency of type ii restriction endonuclease activities was detected in selenomonas ruminantium but not in other rumen bacteria tested. eight different restriction endonucleases were characterized in 17 strains coming from genetically homogeneous local population. chromosomal dna isolated from s. ruminantium strains was found to be refractory to cleavage by various restriction enzymes, implying the presence of methylase activities additional to those required for protection against the c ...200111501482
prevalence of liver disease in patients with streptococcus bovis bacteraemia.the relationship between streptococcus bovis bacteraemia and gastrointestinal disease (mainly colon cancer) is well known. patients with advanced liver disease are prone to bacteraemia. less attention has been paid to the association between liver disease and streptococcus bovis bacteraemia in the literature.200111531317
the effect of condensed tannins from lotus pedunculatus and lotus corniculatus on the growth of proteolytic rumen bacteria in vitro and their possible mode of action.five strains of proteolytic rumen bacteria were treated with condensed tannins (ct) purified from lotus pedunculatus and lotus corniculatus to investigate their effect on the growth of these bacteria in vitro. streptococcus bovis ncfb 2476, eubacterium sp. c124b, prevotella bryantii b14, butyrivibrio fibrisolvens h17c, and clostridium proteoclasticum b316t were tested against 200, 400, and 600 microg ct x ml(-1) extracted from l. pedunculatus and l. corniculatus. in the absence of ct, all bacter ...200111547882
comparison of clinical and echocardiographic characteristics of streptococcus bovis endocarditis with that caused by other pathogens.the aim of our study was to compare the clinical, echographic, and prognostic features of streptococcus bovis (s. bovis) endocarditis with those caused by other streptococci and pathogens in a large sample of patients with definite endocarditis by duke criteria, using transesophageal echocardiography. two hundred six patients (149 men, mean age 57 +/- 15 years) with a diagnosis of infective endocarditis formed the study population. all patients underwent multiplane transesophageal echocardiograp ...200111676950
recombinant escherichia coli engineered for production of l-lactic acid from hexose and pentose sugars.recombinant escherichia coli have been constructed for the conversion of glucose as well as pentose sugars into l-lactic acid. the strains carry the lactate dehydrogenase gene from streptococcus bovis on a low copy number plasmid for production of l-lactate. three e. coli strains were transformed with the plasmid for producing l-lactic acid. strains fbr9 and fbr11 were serially transferred 10 times in anaerobic cultures in sugar-limited medium containing glucose or xylose without selective antib ...200111687940
high prevalence of inducible erythromycin resistance among streptococcus bovis isolates in taiwan.susceptibilities to 13 antimicrobial agents were determined by measurement of mics for 60 isolates of streptococcus bovis from blood cultures. thirty-eight isolates (63.3%) had high-level resistance to erythromycin (mics, >or=128 microg/ml). among the 38 erythromycin-resistant strains, 21 isolates (55%) had inducible resistance to macrolides-lincosamides-streptogramin b (imls isolates) and 17 (45%) had constitutive resistance to macrolides-lincosamides-streptogramin b (cmls isolates). tetracycli ...200111709309
[infectious endocarditis in france today].infectious endocarditis (ie) is an uncommon condition carrying a relatively high mortality and morbidity. two epidemiological studies, undertaken eight years apart, provide data allowing an appreciation of changes in the epidemiological and clinical profiles of ie. they show a progressive increase in the age of patients affected by ie and a decrease in percentage of ie on native pathological valves and valvular prostheses, compensated by the increase in incidence of ie occurring in patients with ...200111725716
discitis associated with pregnancy and spinal anesthesia.discitis (inflammation of the intervertebral disk) most commonly develops as a rare complication of bacterial infection or chemical or mechanical irritation during spine surgery (1) with a postoperative incidence of 1%-2.8% (2). it is also a complication of discography-the intradiscal injection of saline or contrast material (3). the incidence of postdiscography discitis is 1%-4% (3); no cases have been reported when prophylactic antibiotics have been used, supporting the theory of bacterial con ...200211812710
microbial diversity of a mesophilic hydrogen-producing sludge.a hydrogen-producing sludge degraded 99% of glucose at 36 degrees c and ph 5.5, producing a methane-free biogas (comprising 64% hydrogen) and an effluent comprising mostly butyrate, acetate, and ethanol. the yield was 0.26 l h2 g(-1) glucose and the production rate per gram of volatile suspended solids was 4.6 1 h2 day(-1). a 16s rdna library was constructed from the sludge for microbial species determination. a total of 96 clones were selected for plasmids recovery, screened by denaturing gradi ...200211833529
efficacy and safety of vancomycin constant-rate infusion in the treatment of chronic gram-positive bone and joint infections.objective: to evaluate the efficacy and safety of vancomycin constant-rate infusion over 24 h in the treatment of gram-positive bone infections, methods: vancomycin (40 mg/kg/day) was administered without a loading dose to 15 patients (12 male, three female) aged 23--90 years, weighing 46--85 kg, with postoperative chronic bone and joint infections. the 24-h dose was adjusted to maintain plasma levels between 25 and 35 mg/l. mean duration of therapy was 6.2 months (4--8.5) via a portable infusio ...199711864154
isolated pulmonary valve endocarditis caused by streptococcus bovis: case report and review. 199811864250
role of aminoglycosides in the treatment of bacterial endocarditis.aminoglycosides are often used in combination with glycopeptides and beta-lactams for the treatment of bacterial endocarditis caused by alpha-haemolytic streptococci, staphylococci and enterococci. recommendations on dosing and duration of aminoglycoside therapy vary; we detail the laboratory and clinical evidence base for the treatment regimens advised. a number of deficiencies in the published guidelines are highlighted, as is the limited evidence base upon which many of the regimens are recom ...200211864943
streptococcus bovis meningitis in a healthy adult patient.we describe the first case in the english language of streptococcus bovis meningitis in a 45-y-old patient without any underlying disease or predisposing condition. s. bovis biotype ii was isolated from his spinal fluid and blood. the illness was community-acquired and was clinically and biologically similar to disease caused by the classical meningeal pathogens. the patient was cured after 10 d of therapy with ceftriaxone and, 2.5 y later, is currently healthy. as a result of this case and a si ...200211874167
streptococcus bovis meningitis in a neonate with ivemark syndrome.although streptococcus bovis infections in adults are associated with endocarditis and bowel neoplasms, s. bovis-associated meningitis is rare in neonates. we describe the case of a neonate with ivemark syndrome, which possibly predisposed her to infection with this bacterium.200211874168
successful treatment of a ruptured mycotic aneurysm of the ileocolic artery with transcatheter embolization and antibiotic therapy.we report a case of mycotic aneurysm of the ileocolic artery due to streptococcus bovis endocarditis and acute septicemia complicated by active hemorrhage, that was treated successfully with transcatheter embolization and subsequent intravenous antibiotic treatment. this case suggests that a mycotic aneurysm can be treated successfully by percutaneous embolization in an emergent situation (active bleeding, septicemia) even without previous antibiotic therapy.200111907733
effects of exogenous ammonia or free amino acids on proteolytic activity and protein breakdown products in streptococcus bovis, prevotella albensis, and butyrivibrio fibrisolvens.we studied in details the ammonia or free amino acids (aa) effects on proteolytic activity of three ruminal bacteria: enzymatic activities and protein breakdown products were measured at the end of the exponential growth phase. in streptococcus bovis the simultaneous uptake of ammonia and probably small peptides induced a decline in total proteolytic activity as a result of changes in endopeptidasic activities. with free aa, the tendency for the endopeptidasic activities to specialise was more e ...200212000995
isolation from a shea cake digester of a tannin-degrading streptococcus gallolyticus strain that decarboxylates protocatechuic and hydroxycinnamic acids, and emendation of the species.a facultatively anaerobic, mesophilic, non-motile, non-sporulating bacterium, designated strain b7, was isolated from an anaerobic digester fed with shea cake rich in tannins and aromatic compounds, after enrichment on tannic acid. the coccoid cells (less than 2 microm in diameter) occurred in pairs or short chains and stained gram-positive. strain b7 fermented a wide range of carbohydrates (cellobiose, fructose, galactose, glucose, lactose, maltose, mannitol, melibiose, raffinose and trehalose) ...200212054261
comparison between streptococcus macedonicus and streptococcus waius strains and reclassification of streptococcus waius (flint et at. 1999) as streptococcus macedonicus (tsakalidou et al. 1998).two species of dairy streptococci, streptococcus waius and streptococcus macedonicus, were originally characterized by 16s-23s intergenic spacer sequence analysis, random amplified polymorphic dna fingerprinting, pfge analysis and dna-dna reassociation experiments. all genetic data suggested that s. waius strains belong to the previously described species s. macedonicus. likewise, the phenotypic characterization showed that strains of s. macedonicus and s. waius were highly related and easily di ...200212054262
[acute renal failure and leukocytoclastic vasculitis as the presenting form of infectious endocarditis caused by streptococcus bovis]. 200212085425
molecular characterization and expression of pyruvate formate-lyase-activating enzyme in a ruminal bacterium, streptococcus clarify the significance of the activation of pyruvate formate-lyase (pfl) by pfl-activating enzyme (pfl-ae) in streptococcus bovis, the molecular properties and gene expression of pfl-ae were investigated. s. bovis pfl-ae was deduced to consist of 261 amino acids with a molecular mass of 29.9 kda and appeared to be a monomer protein. similar to escherichia coli pfl-ae, s. bovis pfl-ae required fe(2+) for activity. the gene encoding pfl-ae (act) was found to be polycistronic, and the pfl gene ...200212089014
source of enterococci in a farmhouse raw-milk cheese.enterococci are widely distributed in raw-milk cheeses and are generally thought to positively affect flavor development. their natural habitats are the human and animal intestinal tracts, but they are also found in soil, on plants, and in the intestines of insects and birds. the source of enterococci in raw-milk cheese is unknown. in the present study, an epidemiological approach with pulsed-field gel electrophoresis (pfge) was used to type 646 enterococcus strains which were isolated from a ch ...200212089042
special issues in the management of infective endocarditis caused by gram-positive cocci.gram-positive cocci, mainly streptococci and staphylococci, continue to cause the majority of cases of infective endocarditis. among the streptococci causing ie, the long-standing predominance of oral or viridans-group streptococci has progressively faded, while the number of cases caused by "enteric streptococci" (streptococcus bovis and enterococci) has increased. while most oral streptococci and s. bovis strains remain fully sensitive to penicillin, nutritionally variant streptococci--now ren ...200212092481
spontaneous bacterial peritonitis caused by streptococcus bovis: case series and review of the literature.streptococcus bovis is the rare cause of spontaneous bacterial peritonitis in decompensated cirrhosis. s. bovis bacteremia has long been known to be associated with colon cancer. we describe seven patients and review the seven previous reports of spontaneous bacterial peritonitis patients with s. bovis infection. most of the patients had cirrhosis and presented with fever, abdominal pain, abdominal distention, and jaundice. colonic adenomatous polyps with dysplastic change were found in 18.2% of ...200212094869
fermentation of pectin and glucose, and activity of pectin-degrading enzymes in the rabbit caecal bacterium bifidobacterium a rabbit caecal bacterium bifidobacterium pseudolongum, metabolites of pectin and glucose, and activities of enzymes involved in the degradation of pectin were assayed. simultaneously, activities of these enzymes were assayed in a rumen pectinolytic strain of streptococcus bovis.200212100587
a 76-year-old man with septic arthritis. 200212109638
the bacteriocins of ruminal bacteria and their potential as an alternative to antibiotics.beef cattle have been fed ionophores and other antibiotics for more than 20 years to decrease ruminal fermentation losses (e.g methane and ammonia) and increase feed efficiency, and these improvements have been explained by an inhibition of gram-positive ruminal bacteria. ionophores are not used to treat human disease, but there has been an increased perception that antibiotics should not be used as feed additives. some bacteria produce small peptides (bacteriocins) that inhibit gram-positive ba ...200212125815
[streptococcus bovis meningitis. an infrequent cause of bacterial meningitis in the adult patient].bacterial meningitis in adult patients, produced by streptococci other than streptococcus pneumoniae, is not common.200212134348
taxonomic dissection of the streptococcus bovis group by analysis of manganese-dependent superoxide dismutase gene (soda) sequences: reclassification of 'streptococcus infantarius subsp. coli' as streptococcus lutetiensis sp. nov. and of streptococcus bovis biotype 11.2 as streptococcus pasteurianus sp. nov.the taxonomic dissection of the streptococcus bovis-streptococcus equinus group was carried out upon obtaining sequences for the manganese-dependent superoxide dismutase gene (soda) of the type strains of s. bovis, streptococcus caprinus, s. equinus, streptococcus gallolyticus, streptococcus infantarius, streptococcus macedonicus and streptococcus waius. the soda sequences of 29 streptococcal strains of animal and human origin that were related to s. bovis were also sequenced. a phylogenetic ana ...200212148636
identification of streptococcus bovis biotype i strains among s. bovis clinical isolates by pcr.streptococcus bovis causes 24% of all streptococcal infective endocarditis cases. there are many reports linking both s. bovis bacteremia and endocarditis with various forms of gastrointestinal disease (primarily colonic cancers). s. bovis is divided into two biotypes: i and ii. the biotype i strain is much more frequently isolated from patients with endocarditis, gastrointestinal disease, or both. we describe here the isolation of biotype i-specific dna sequences and the development of a pcr te ...200212149351
effects of bacterial direct-fed microbials on ruminal fermentation, blood variables, and the microbial populations of feedlot cattle.a study was conducted to determine whether bacterial direct-fed microbials (dfm) could be used to minimize the risk of acidosis in feedlot cattle receiving high concentrate diets. six ruminally cannulated steers, previously adapted to a high concentrate diet, were used in a double 3 x 3 latin square to study the effects of dfm on feed intake, ruminal ph, and ruminal and blood characteristics. steers were provided ad libitum access to a diet containing steam-rolled barley, barley silage, and a pr ...200212162668
characterization of a bacteriocin produced by a newly isolated bacillus sp. strain 8 a.the aim of this research was to investigate the production of bacteriocins by bacillus spp. isolated from native soils of south of brazil.200212174052
cholesterol assimilation by lactic acid bacteria and bifidobacteria isolated from the human gut.the objective of this study was to evaluate the effect of human gut-derived lactic acid bacteria and bifidobacteria on cholesterol levels in vitro. continuous cultures inoculated with fecal material from healthy human volunteers with media supplemented with cholesterol and bile acids were used to enrich for potential cholesterol assimilators among the indigenous bacterial populations. seven potential probiotics were found: lactobacillus fermentum strains f53 and kc5b, bifidobacterium infantis at ...200212200334
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 ...200212202549
video-assisted cardioscopy for infectious endocarditis.we successfully resected vegetation of infectious endocarditis in right ventricular outflow tract using a video-assisted cardioscopy without ventriculotomy. video-assisted cardioscopy provided clear and precise visualization of vegetation on the anterior wall of right ventricular outflow. this technique is effective to visualize remote intra-cardiac structures, and to facilitate repairs, while avoiding the need for extended cardiac incisions.200212211206
reevaluation of streptococcus bovis endocarditis cases from 1975 to 1985 by 16s ribosomal dna sequence analysis.studies that detected an association between streptococcus bovis endocarditis and colon carcinoma have not taken into account the recently identified genetic diversity among organisms historically classified as s. bovis. with near full-length 16s ribosomal dna sequence analysis, organisms cultured from the blood of endocarditis patients at the mayo clinic from 1975 to 1985 and previously identified as s. bovis or streptococcus group d nonenterococci were shown to represent s. bovis biotypes i (1 ...200212354897
are ruminal bacteria protected against environmental stress by plant antioxidants?to investigate the activity response of the antioxidant enzymes superoxide dismutase (sod) and glutathione peroxidase (gshpx) of the rumen bacterium streptococcus bovis following exposure to mercury(ii) chloride (hgcl(2) in the presence of plant antioxidants.200212358692
what happened to the streptococci: overview of taxonomic and nomenclature changes.since the division of the streptococcus genus into enterococci, lactococci, and streptococci in 1984, many changes in the nomenclature and taxonomy of the streptococcus genus have taken place. the application of genetic comparisons has improved the proper classification of the different species. the lancefield system of serogrouping the streptococci by the expression of beta-hemolysis on blood agar plates is still very useful for the identification of streptococci for patient management. the lan ...200212364372
streptococcus bovis meningitis in an otherwise healthy infant. 200212365316
streptococcus bovis bacteremia and fetal death.preterm premature rupture of membranes leading to intraamniotic infection and fetal death may be due to unusual bacterial species.200212423832
bovicin hc5, a bacteriocin from streptococcus bovis hc5.previous work indicated that streptococcus bovis hc5 had significant antibacterial activity, and even nisin-resistant s. bovis jb1 cells could be strongly inhibited. s. bovis hc5 inhibited a variety of gram-positive bacteria and the spectrum of activity was similar to monensin, a commonly used feed additive. the crude extracts (ammonium sulfate precipitation) were inactivated by pronase e and trypsin, but the activity was resistant to heat, proteinase k and alpha-chymotrypsin. most of the antiba ...200212427926
factors affecting the antibacterial activity of the ruminal bacterium, streptococcus bovis hc5.streptococcus bovis hc5 inhibits a variety of s. bovis strains and other gram-positive bacteria, but factors affecting this activity had not been defined. batch culture studies indicated that s. bovis hc5 did not inhibit s. bovis jb1 (a non-bacteriocin-producing strain) until glucose was depleted and cells were entering stationary phase, but slow-dilution-rate, continuous cultures (0.2 h(-1)) had as much antibacterial activity as stationary-phase batch cultures. because the activity of continuou ...200312432458
[meningitis due to streptococcus bovis biotype ii. clinical case and review of the literature]. 200212433359
effects of pneumoperitoneum on hemodynamic and systemic immunologic responses to peritonitis in pigs.experimental evidence supporting the safety of laparoscopic intervention during sepsis is limited. the purpose of this study was to evaluate the effects of pneumoperitoneum on immunologic and hemodynamic responses to peritoneal sepsis.200212443712
the effect of bovicin hc5, a bacteriocin from streptococcus bovis hc5, on ruminal methane production in vitro.methane represents a loss of feed energy to ruminant animals, and nutritionists have sought methods of inhibiting ruminal methane production. when mixed ruminal bacteria (approximately 400 mg protein ml(-1)) from a cow fed timothy hay were incubated in vitro with carbon dioxide and hydrogen (0.5 atm) for less than 8 h, the first-order rate of methane production was 17 micromol ml(-1). semi-purified bacteriocin from streptococcus bovis hc5 (bovicin hc5) inhibited methane production, by as much as ...200212445645
streptococcus bovis bacteremia from a venous access port in a patient with aids.we report the first case of s. bovis bacteremia related to endoluminal colonization of a venous access port in a setting of advanced hiv infection, neutropenia and co-infection with hbv. the patient had no bowel abnormalities. the clinical picture was mild and was resolved by removal of the device.200212477330
infected left atrial myxoma.a 47-year-old japanese woman with a continuing high fever was promptly diagnosed as having infected atrial myxoma one day after admission based on transthoracic echocardiographic findings and positivity for bacteria in blood culture. the mass was removed by an urgent open heart surgery. histopathological examination confirmed that this mass was a myxoma with gram-positive bacterial colonies. generally, antemortem diagnosis is difficult and there is a high mortality of patients with infected myxo ...200212487167
lotus corniculatus condensed tannins decrease in vivo populations of proteolytic bacteria and affect nitrogen metabolism in the rumen of sheep.condensed tannins in forage legumes improve the nutrition of sheep by reducing ruminal degradation of plant protein and increasing crude protein flow to the intestine. however, the effects of condensed tannins in forage legumes on rumen bacterial populations in vivo are poorly understood. the aim of this study was to investigate the specific effects of condensed tannins from lotus corniculatus on four proteolytic rumen bacteria in sheep during and after transition from a ryegrass (lolium perenne ...200212489781
regulation of lactate dehydrogenase synthesis in a ruminal bacterium, streptococcus bovis.lactate dehydrogenase (ldh) was purified from three strains of streptococcus bovis, and the gene ldh was cloned and sequenced. the ldh of s. bovis from a goat (th1) was different from the ldhs of two other strains from cattle (th2, jb1) in that asp(220) was substituted for glu. northern blot analysis revealed that the ldh-mrna of s. bovis was approximately 1.0 kbp, which was transcribed in a monocistronic fashion. when cells were grown at ph 6.9 in a batch culture, the level of ldh transcript de ...199712501303
molecular diagnosis of infective endocarditis by pcr amplification and direct sequencing of dna from valve tissue.we used broad-range eubacterial pcr amplification followed by direct sequencing to identify microbial pathogens in heart valve material from 29 patients with histologically confirmed infective endocarditis and 23 patients free of infective endocarditis. microorganisms cultured by conventional techniques matched those identified by pcr in 21 cases. pcr alone identified the causative agent in three cases (streptococcus bovis, staphylococcus cohnii, and coxiella burnetii), allowing better patient m ...200312574279
diet influences the ecology of lactic acid bacteria and escherichia coli along the digestive tract of cattle: neural networks and 16s this manuscript, the authors have sought to gain a better understanding of the interactions between escherichia coli and lactic acid bacteria (lab) isolated from rogossa mrs agar along the digestive tract of grain- and forage-fed cattle. e. coli from cattle receiving a high-grain diet were more numerous (p<0.05) than from the high-forage diet and the highest numbers were in the faeces. isolates on rogossa mrs agar were always greater in the high-grain diet (p<0.05) and contained a significant ...200312576580
molecular characterization of hpr and related enzymes, and regulation of hpr phosphorylation in the ruminal bacterium streptococcus bovis.molecular properties of hpr, enzyme i, and hpr kinase in streptococcus bovis, and the regulation of hpr phosphorylation were examined. the genes encoding hpr (ptsh) and enzyme i (ptsi) were found to be cotranscribed. two transcriptional start sites were detected in a region upstream of the hpr kinase gene (hprk). hpr kinase had both hpr-phosphorylating and hpr-dephosphorylating activities. the importance of phosphorylation of ser-46 in hpr was shown by using a mutant hpr in which ser-46 was repl ...200312610726
[streptococcus bovis endocarditis - predictor of colonic carcinoma? ].the association of streptococcus bovis endocarditis with colonic neoplasia is classically described and exceeds 50 percent. the prevalence of streptococcus bovis in fecal cultures from patients with carcinoma of the colon is significantly increased (56%) as compared to that in controls (10%) and also in patients with inflammatory bowel disease (28%). streptococcus bovis endocarditis is relatively benign, but it stresses the frequency of the associated colonic carcinoma, requiring colonoscopy and ...200312626871
no synthesis in human saliva.human saliva contains nitrate that is converted into nitrite by the activity of facultative, anaerobic bacteria of the oral cavity. nitrite can be reduced to no in the acidic gastric milieu; some no may also form in the mouth at acidic ph values. in this paper, we show that bacteria (s. salivarius, s. mitis and s. bovis) isolated from saliva, may contribute to no production in human saliva. no formation by bacteria occurs at neutral ph values and may contribute to the antibacterial activity of s ...200312653214
identification of equine cecal bacteria producing amines in an in vitro model of carbohydrate overload.acute laminitis has been associated with the overgrowth of gram-positive bacteria within the equine hindgut, causing the release of factor(s) leading to ischemia-reperfusion of the digits. the products of fermentation which trigger acute laminitis are, as yet, unknown; however, vasoactive amines are possible candidates. the objectives of this study were to use an in vitro model of carbohydrate overload to study the change in populations of cecal streptococci and lactobacilli and to establish whe ...200312676687
streptococcus bovis revisited: a clinical review of 81 bacteremic episodes paying special attention to emerging antibiotic resistance.following 2 cases of streprococcus bovis endocarditis with a high level of resistance to clindamycin during 2002, the authors reviewed their clinical experience with s. bovis bacteremia during 2 periods, starting in 1980. 81 episodes of s. bovis bacteremia represented approximately 1% of all episodes of bacteremia. in 32 (40%) cases the bacteremia represented endocarditis, in 15 (19%) the bacteremia originated from sick bowel, 11 (14%) were suspected to arise from urinary tract infection, 10 (12 ...200312693556
isolated cerebrospinal fluid eosinophilia due to streptococcus bovis meningitis in an infant. 200212725215
[streptococcus bovis as an opportunistic pathogen during advanced hiv disease]three rare case reports of hiv-related streptococcus bovis bacteremia are described, and discussed on the basis of a literature review. the association with an advanced immunodeficiency, leukopenia-neutropenia, and liver cirrhosis is underlined as well as the possibility of multiple recurrences and the lack of apparent gastrointestinal lesions as risk factors.199912736556
[infectious endocarditis. a study of 50 patients in a non-university hospital].the authors report the results of a single centre study of 50 consecutive patients (average age 66 +/- 14 years; 36 men), admitted between 1992 and 2001 to a peripheral hospital for infectious endocarditis (ie). the median interval to diagnosis was 57 days. there was an underlying cardiac disease in 52% of cases, usually valvular (42%). the site of the ie was the mitral valve in 21 cases, the aortic valve in 19 cases, mitro-aortic valves in 5 cases, native tricuspid valves in 2 cases and pacing ...200312741305
infectious endocarditis from streptococcus bovis associated with colonic carcinoma: case report and literature review.many studies in the literature have warned of the need for investigation of colonic lesions among patients, especially elderly ones, who have bacteremia and/or endocarditis from streptococcus bovis. bacteremia and infectious endocarditis from streptococcus bovis may be related to the presence of neoplastic lesions in the large intestine and hepatic disease.200312778310
expression of ruminococcus albus xylanase gene ( xyna) in streptococcus bovis 12-u-1.the objective of this study was to ligate the xylanase gene a ( xyna) isolated from ruminococcus albus 7 into the promoter and signal-peptide region of the lichenase [beta-(1,3-1,4)-glucanase] gene of streptococcus bovis jb1. this fusion gene was inserted into the psbe11 vector, and the resulting recombinant, plasmid pxa, was used to transform s. bovis 12-u-1 cells. the transformant, s. bovis 12uxa, secreted the xylanase, which was stable against freeze-thaw treatment and long-time incubation at ...200312783197
ischemic stroke and splenic rupture in a case of streptococcus bovis endocarditis.a 58-year-old man with an acute stroke suffered from splenic rupture. streptococcus bovis was found in blood cultures, and gram-negative cocci were found in the infarcted spleen. hemorrhagic transformation of the stroke occurred. echocardiography showed aortic endocarditis. cardiac surgery was not performed because of concern about cerebral bleeding. the patient died due to cerebral rehemorrhage after 3 weeks.200312791896
reappraisal of the taxonomy of the streptococcus bovis/streptococcus equinus complex and related species: description of streptococcus gallolyticus subsp. gallolyticus subsp. nov., s. gallolyticus subsp. macedonicus subsp. nov. and s. gallolyticus subsp. pasteurianus subsp. nov.'streptococcus bovis/streptococcus equinus' is a large bacterial complex including different species frequently isolated from infections of humans (streptococcus gallolyticus, streptococcus infantarius) or animals (s. bovis, s. equinus, streptococcus alactolyticus). the separation of s. bovis into three different biotypes has been partially correlated with genetic differentiation. in addition, recent advances in bacterial phylogeny have led to the inclusion of streptococcus macedonicus and strep ...200312807180
continuous ambulatory peritoneal dialysis-related peritonitis caused by streptococcus bovis.the first case of streptococcus bovis peritonitis associated with continuous ambulatory peritoneal dialysis (capd) in a 40-year-old chinese woman suffering from systemic lupus erythematosus is reported. streptococcus bovis is part of the normal flora in the human intestine and, less commonly, the female genital tract. being a rare cause of peritonitis, the possible link between genital tract colonization by streptococcus bovis and retrograde invasion of the peritoneal cavity is postulated to be ...200312827532
neonatal sepsis caused by streptococcus bovis variant (biotype ii/2): report of a case and review.streptococcus bovis is an uncommon cause of infection in neonates. however, s. bovis is capable of causing fulminant neonatal sepsis or meningitis that is indistinguishable clinically from that caused by group b streptococcus. s. bovis and s. bovis variant (sometimes referred to as s. bovis biotypes i and ii, respectively) are phenotypically similar but may be differentiated by expanded testing. in adults, specific associations between disease states and different biotypes of s. bovis are appare ...200312843113
adrenomedullin expression by gastric epithelial cells in response to infection.many surface epithelial cells express adrenomedullin, a multifunctional peptide found in a wide number of body and cell systems. recently, we and others have proposed that adrenomedullin has an important novel role in host defense. this peptide has many properties in common with other cationic antimicrobial peptides, including the human beta-defensins. upon exposure of human gastric epithelial cells to viable cells of invasive or noninvasive strains of helicobacter pylori, escherichia coli, salm ...200312853384
microbial and physiological characterization of weakly amylolytic but fast-growing lactic acid bacteria: a functional role in supporting microbial diversity in pozol, a mexican fermented maize beverage.pozol is an acid beverage obtained from the natural fermentation of nixtamal (heat- and alkali-treated maize) dough. the concentration of mono- and disaccharides from maize is reduced during nixtamalization, so that starch is the main carbohydrate available for lactic acid fermentation. in order to provide some basis to understand the role of amylolytic lactic acid bacteria (alab) in this fermented food, their diversity and physiological characteristics were determined. forty amylolytic strains ...200312902217
ability of lysozyme and 2-deoxyglucose to differentiate human and bovine streptococcus bovis strains.human and bovine streptococcus bovis strains had the same 16s ribosomal dna restriction fragment length polymorphism and often had the same patterns of starch, mannitol, lactose, and raffinose utilization. pcrs of box sequences differed, but numerical analyses indicated that some human strains clustered with bovine strains. however, human and bovine strains had distinctly different sensitivities to lysozyme and 2-deoxyglucose.200312904427
establishing populations of megasphaera elsdenii ye 34 and butyrivibrio fibrisolvens ye 44 in the rumen of cattle fed high grain determine whether megasphaera elsdenii ye34 (lactic acid degrader) and butyrivibrio fibrisolvens ye44 (alternative starch utilizer to streptococcus bovis) establish viable populations in the rumen of beef cattle rapidly changed from a forage-based to a grain-based diet.200312911711
[metabolism of rumen microbial populations formed on biosubstrates with different assimilation under the effect of pentachlorophenol].it has been established that metabolism of mixed microbial population formed on easy assimilated sources of energy and nitrogen (concentrate diet) progressed on higher level. there is increase of amilolytic activity, formation of lactate, ammonia, low molecular carbonic acids with predomination of propionate molar fraction. the increased resistance to effect of pentachlorophenol (pcp) is characteristic nature of the latter. the role of the most resistant synthrophic bacteria to pcp increases. th ...200212916235
septic arthritis due to streptococcus bovis in a patient with cirrhosis of enolic etiology.we present a case of bacteremia and septic arthritis due to streptococcus bovis biotype i after shock, in a patient with liver cirrhosis of enolic etiology. diagnosis was made based on a clinical setting of fever and a painful shoulder. the presence of colonic neoplasia was ruled out in this patient and the bacteremia developed without endocarditis.200312952512
antimicrobial resistance patterns of vancomycin-resistant streptococcus equinus isolated from animal foods and epidemiological typing of resistant s. equinus by microbial uniprimer kit.raw milk samples, and cow and chicken intestines were tested to isolate vancomycin-resistant, gram-positive bacteria. from these samples, we isolated seven vancomycin-resistant streptococcus equinus, two vancomycin-resistant viridans streptococcus and two vancomycin-resistant enterococcus faecium. the mics of several antibiotics, including vancomycin, against these strains were tested. seven isolates of s. equinus showed high level resistance to vancomycin and teicoplanin (>100 microg/ml). the c ...200312967199
geographical difference of disease association in streptococcus bovis bacteraemia.from 1996 to 2001, 48 streptococcus bovis strains were isolated from blood cultures of 37 patients in one hospital. median patient age was 68 years (range: 1 day-88 years). the male : female ratio was 23 : 14. most patients (97 %) had underlying diseases, including biliary tract disease in 14 (38 %), diabetes mellitus in 12 (32 %), liver parenchymal disease in seven (19 %), carcinoma of the colon in four (11 %) and other malignancies in four (11 %). no infective foci (indicative of primary bacte ...200312972586
verrucous endocarditis associated with streptococcus bovis in mink (mustela vison).between 1998 and 2001, mortalities due to verrucous endocarditis were experienced at several mink farms. gram-positive cocci were isolated from the endocardium of all the animals examined but not always from other internal organs. almost all the isolates were identified as streptococcus bovis and only a few isolates belonged to other streptococcus species. typing by pulsed-field gel electrophoresis of a selection of isolates revealed several patterns and several different clones. attempts to rep ...200312974338
the folic acid and serine nutrition of leuconostoc mesenteroides p60 (streptococcus equinus p60). 195413152338
effects of carbon dioxide on the growth and amino acid metabolism of streptococcus bovis. 195513263287
the effect of carbon dioxide on polysaccharide production by streptococcus bovis. 195613366900
effects of carbon dioxide on the growth of streptococcus bovis in the presence of various amino acids. 195713405875
production of hemolytic zones on blood agar by certain strains of streptococcus bovis under increased co2 tension. 195713416185
prerequisites for dextran production by streptococcus bovis. 195813566233
a quantitative study of the production of dextran from sucrose by rumen strains of streptococcus bovis. 195813575761
the nutritional requirements of rumen strains of streptococcus bovis considered in relation to dextran synthesis from sucrose. 195813611204
transglucosidase activity of rumen strains of streptococcus bovis; structure of the dextran produced from sucrose. 195913628526
transglucosidase activity of rumen strains of streptococcus bovis. 2. isolation and properties of dextransucrase. 195913651133
the nature of the capsular polysaccharides of the dextran-producing organisms leuconostoc mesenteroides, l. dextranicum and streptococcus bovis. 195913654720
ammonium salts as a sole source of nitrogen for the growth of streptococcus bovis. 195913672923
nutrition of streptococcus bovis in relation to dextran formation.barnes, isabel j. (cornell university, ithaca, n. y.), h. w. seeley, and p. j. vandemark. nutrition of streptococcus bovis in relation to dextran formation. j. bacteriol. 82:85-93. 1961.-three nutritional types of streptococcus bovis were encountered. minimal media for their growth are described. transferable growth in defined media was always accompanied by dextran production and the nutrition for dextran production could not be distinguished from the minimal nutritional requirements of the org ...196113687103
formation of leucrose in dextran-producing cultures of streptococcus bovis. 195913795857
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