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polytopic spondylodiscitis secondary to streptococcus bovis endocarditis. 199910461490
effect of virginiamycin on ruminal fermentation in cattle during adaptation to a high concentrate diet and during an induced acidosis.the objective of exp. 1 was to compare the effects of virginiamycin (vm; 0, 175, or 250 mg x animal(-1) x d(-1)) and monensin/tylosin (mt; 250/ 90 mg x animal(-1) x d(-1)) on ruminal fermentation products and microbial populations in cattle during adaptation to an all-concentrate diet. four ruminally cannulated, holstein steers were used in a 4x4 williams square design with 21-d periods. steers were stepped up to an all-concentrate diet fed at 2.5% of bw once daily. ruminal ph, protozoal counts, ...199910462007
[streptococcus bovis sepsis, purulent meningitis and colonic diverticulosis]. 199910481346
proteolytic activities of the starch-fermenting ruminal bacterium, streptococcus bovis.the objective of this study was to characterize the extracellular proteolytic activity of streptococcus bovis. strains keg, jb1, ncfb 2476, and k11.21.09.6c produced very similar large molecular weight (160-200 kda) extracellular proteases that were specifically inhibited by pmsf, a serine protease inhibitor. further experiments with s. bovis keg indicated that cultures grown with casein as the sole added n source produced the greatest level of proteolytic activity, and the level of proteolytic ...199910486052
the ability of "low g + c gram-positive" ruminal bacteria to resist monensin and counteract potassium depletion.gram-negative ruminal bacteria with an outer membrane are generally more resistant to the feed additive, monensin, than gram-positive species, but some bacteria can adapt and increase their resistance. 16s rrna sequencing indicates that a variety of ruminal bacteria are found in the "low g + c gram-positive group," but some of these bacteria are monensin resistant and were previously described as gram-negative species (e.g., selenomonas ruminantium and megasphaera elsdenii). the activity of mone ...199910486059
genetic homogeneity and phage susceptibility of ruminal strains of streptococcus bovis isolated in australia.the genetic homogeneity of 37 strains of ruminal streptococci was investigated by comparing dna fragment profiles on agarose gels following restriction endonuclease digestion with hae iii, cfo i and msp i. thirty strains were indistinguishable from streptococcus bovis strains, 2b, h24 and ar3. the remaining three strains were similar but not identical to a ruminal strain of strep. intermedius (ar36). in addition, the susceptibility of these strains to infection by five bacteriophages was examine ...199910499298
natural genetic transformation in the rumen bacterium streptococcus bovis jb1.natural transformation of streptococcus bovis jb1 was demonstrated after development of competence in normal culture medium. transformation efficiencies were not significantly increased when heat-inactivated horse serum was added to the medium before growth. this is the first time that a resident rumen bacterial species has been shown to be naturally transformable. transformation allowed the acquisition of plasmids or integration of sequences into the chromosome. no transformation was observed i ...199910518755
binding of selected extracellular matrix proteins to enterococci and streptococcus bovis of animal origin.thirty-three enterococcal strains and 10 streptococcus bovis strains were investigated for their protein-binding cell surface components. seven extracellular matrix (ecm) proteins were immobilized on difco latex beads to detect these components on the surface of all enterococcal strains and eight non-autoaggregating s. bovis strains by a particle agglutination assay (paa). twenty-three selected strains were also examined in microtiter plate assays. according to the absorbance readings (a(570nm)) ...199910525837
immunological cross-reactivity between the vaccine and other isolates of streptococcus bovis and lactobacillus.recent studies have showed that immunisation with streptococcus bovis (sb-5) and lactobacillus (lb-27) may confer protection against lactic acidosis in sheep and cattle. the present study was designed to determine the degree of immunological cross-reactivity between sb-5 and eight other strains of streptococcus bovis; and between lb-27 and four other isolates of lactobacillus. the cross-reactivity index (cri, a low cri indicates a high degree of immunological cross-reactivity) ranged from 7.3 to ...199910536302
physiological characterization of streptococcus bovis mutants that can resist 2-deoxyglucose-induced lysis.streptococcus bovis jb1 does not normally lyse, but stationary phase lysis can be induced by including 2-deoxyglucose (2dg) in the growth medium. isolates deficient in glucose/2dg phosphotransferase activity (pts-) also lysed when 2dg was present (lys+) and this result indicated that 2dg phosphorylation via the pts was not an obligate requirement for 2dg-induced lysis. cells and cell walls from 2dg-grown cultures lysed faster when proteinase k was added, but glucose-grown cultures and cell walls ...199910537220
feasibility of using total purines as a marker for ruminal bacteria.a procedure for measuring total purine content of mixed ruminal bacteria was adapted for use in the determination of purines in pure cultures of ruminal bacteria. recovery of adenine and guanine, alone or in mixture, was quite variable. the problem was traced to solubility of the silver salt of adenine in the acid wash solution. when the precipitating solution was used as the wash, recovery of the purines was over 97%. recovery of a 1:1 mixture of adenine and guanine added to yeast rna was 100.6 ...199910568481
epidemiological typing of bovine streptococci by pulsed-field gel electrophoresis.pulsed-field gel electrophoresis (pfge) was used to investigate the epidemiology of streptococcal mastitis in dairy cattle. the most prevalent streptococcal species, streptococcus uberis (60-80% of streptococcal isolates), was highly heterogeneous, with different cows only rarely sharing the same pulsotype. s. agalactiae was rarely encountered, however all eight isolates from one farm generated identical pfge profiles, which differed from those of all other isolates examined, confirming cow-to-c ...199910579453
a novel staining method for detecting phytase activity.differential agar media for the detection of microbial phytase activity use the disappearance of precipitated calcium or sodium phytate as an indication of enzyme activity. when this technique was applied to the study of ruminal bacteria, it became apparent that the method was unable to differentiate between phytase activity and acid production. strong positive reactions (zones of clearing around microbial colonies) observed for acid producing, anaerobic bacteria, such as streptococcus bovis, we ...199910579503
sorbitol-fermenting bifidobacteria as indicators of diffuse human faecal pollution in estuarine watersheds.sorbitol fermenting bifidobacteria were evaluated as indicators of non-point source human faecal pollution to three sub-estuaries with elevated faecal coliform densities. human-specific bifidobacteria correlated with identifiable human sanitary deficiencies in feeder streams to estuarine creeks in two of three watersheds examined, one rural and one moderately developed. sorbitol-fermenting bifidobacteria were recovered at densities ranging from 1 to 90 colony-forming-units 100 ml-1 in 11 of 258 ...199910583680
identification of aesculin-hydrolyzing streptococci, lactococci, aerococci and enterococci from subclinical intramammary infections in dairy cows.aesculin-hydrolyzing, catalase-negative, gram-positive cocci isolated from subclinical intramammary infections in dairy cows were identified to species level using growth characteristics and biochemical activity. the results indicated that the aesculin-hydrolyzing cocci associated with this type of infection are a very heterogenic group. s. uberis strains, including inulin- or beta-glucuronidase-negative isolates, accounted for only about one-third of the collection, and enterococcus faecalis st ...199910591500
streptococcus equinus endocarditis in a patient with pulmonary histiocytosis x.although streptococcus equinus has been isolated from the human bowel in an appreciable percentage of the adult general population, it has only rarely been described as a human pathogen. our report describes the occurrence of s. equinus endocarditis in a patient who had no history of pre-existing heart disease, but who showed evidence of a late-stage pulmonary histiocytosis x. endocarditis resolved promptly after antibiotic treatment, but required aortic valve substitution. abnormalities of the ...199910680994
[meningitis due to streptococcus bovis type ii].meningitis due to streptococcus bovis is rare. only 14 cases having been reported in the english literature. all patients (including the patient described) had an underlying disease or were treated by pharmacological agents that predisposed the patient to the infection. most were treated by monotherapy with penicillin g (or amoxicillin) and recovered. we describe a 74-year-old woman who had splenectomy as treatment for hairy cell leukemia 6 months before hospitalization for meningitis and sepsis ...199910914172
deoxyribonuclease activity in selenomonas ruminantium, streptococcus bovis, and bacteroides ovatus.six selenomonas ruminantium strains (132c, jw13, srk1, 179f, 5521c1, and 5934e), streptococcus bovis jb1, and bacteroides ovatus v975 were examined for nuclease activity as well as the ability to utilize nucleic acids, ribose, and 2-deoxyribose. nuclease activity was detected in sonicated cells and culture supernatants for all bacteria except s. ruminantium jw13 and 179f sonicated cells. s. ruminantium strains were able to utilize several deoxyribonucleosides, while s. bovis jb1 and b. ovatus v9 ...200010915204
characterization of the cryptic plasmid psbo2 isolated from streptococcus bovis jb1 and construction of a new shuttle vector.a cryptic plasmid designated psbo2 (3582 bp) was isolated from streptococcus bovis jb1. the psbo2 contained putative sites for a double-strand origin (dso), a small transcriptional repressor protein (cop), countertranscribed rnas (ctrnas), and a replication protein (rep), which were similar to those from pmv158 and pls1, which were isolated from s. agalactiae, and pwvo1, isolated from lactococcus lactis. the putative single-strand origin (sso) of psbo2 was similar to per341 and pst1, which were ...200010919395
streptococcus bovis discitis and possible endocarditis. 200010939547
streptococcus infantarius sp. nov., streptococcus infantarius subsp. infantarius subsp. nov. and streptococcus infantarius subsp. coli subsp. nov., isolated from humans and food.eighteen strains isolated from human specimens or from food products were characterized as atypical variants of mannitol-negative streptococcus bovis. they were tested for extended biochemical criteria, ribotyping and dna-dna hybridization in order to define their taxonomic status. these strains were demonstrated to constitute a dna relatedness group that includes strains of dna group 4 of farrow et al. (1984). comparative analysis of 16s rrna sequences demonstrated that these strains represent ...200010939646
effects of ph and energy supply on activity and amount of pyruvate formate-lyase in streptococcus bovis.the enzyme system of pyruvate formate-lyase (pfl) in streptococcus bovis was investigated by isolating pfl and pfl-activating enzyme (pfl-ae) from s. bovis, flavodoxin from escherichia coli, and chloroplasts from spinach. in this study, the pfl and pfl-ae in s. bovis were found to be similar to those in e. coli, suggesting that the activating mechanisms are similar. the optimal ph of s. bovis pfl was 7.5, which is in contrast to the optimal ph of s. bovis lactate dehydrogenase, which is 5.5. the ...200010966389
unretrieved gallstones presenting as a streptococcus bovis liver abscess.we describe a case of a delayed liver abscess presenting two years after a laparoscopic cholecystectomy. at exploration, the patient was found to have an unretrieved gallstone as the nidus for the streptococcus bovis abscess.200010987408
neonate with late onset streptococcus bovis meningitis: case report and review of the literature. 200011001118
effects of thymol on ruminal microorganisms.thymol (5-methyl-2-isopropylphenol) is a phenolic compound that is used to inhibit oral bacteria. because little is known regarding the effects of this compound on ruminal microorganisms, the objective of this study was to determine the effects of thymol on growth and lactate production by the ruminal bacteria streptococcus bovis jb1 and selenomonas ruminantium hd4. in addition, the effect of thymol on the in vitro fermentation of glucose by mixed ruminal microorganisms was investigated. neither ...200011014870
infective endocarditis in patients receiving long-term hemodialysis.to ascertain the predominant characteristics of patients receiving long-term dialysis who develop infective endocarditis (ie).200011040848
streptococcus bovis bacteremia associated with strongyloides stercoralis colitis. 200011115925
significance of fecal volatile fatty acids in shedding of escherichia coli o157 from calves: experimental infection and preliminary use of a probiotic product.cattle have been recognized as a principal reservoir of escherichia coli o157:h7. this organism appears to be confined to the gastrointestinal tract and is shed in feces. a probiotic product containing lactic acid-producing streptococcus bovis lcb6 and lactobacillus gallinarum lcb 12 isolated from adult cattle was developed, and a preliminary experiment was conducted to evaluate its effect on the elimination of e. coli o157 from experimentally infected calves. eight 4-month-old holstein calves w ...200011129857
streptococcus equinus endocarditis in a woman with pulmonary histiocytosis. 200010697059
re: shad and schindler's report on spontaneous peritonitis due to streptococcus bovis. 200010710106
protonmotive force regulates the membrane conductance of streptococcus bovis in a non-ohmic fashion.because the dccd (dicyclohexylcarbodiimide)-sensitive, f-atpase-mediated, futile atp hydrolysis of non-growing streptococcus bovis jb1 cells was not affected by sodium or potassium, atp hydrolysis appeared to be dependent only upon the rate of proton flux across the cell membrane. however, available estimates of bacterial proton conductance were too low to account for the rate of atp turnover observed in s. bovis. when de-energized cells were subjected to large ph gradients (2.75 units, or -170 ...200010746772
promotion of intestinal carcinogenesis by streptococcus bovis.the involvement of streptococcus bovis, an member of the human gut flora, in colorectal neoplastic diseases is an object of controversy. the aim of this study was to determine the effects of s.bovis and of antigens extracted from the bacterial cell wall on early preneoplastic changes in the intestinal tract. adult rats received i. p. injections of azoxymethane (15 mg/kg body weight) once per week for 2 weeks. fifteen days (week 4) after the last injection of the carcinogen, the rats received, by ...200010753212
spontaneous bacterial peritonitis caused by streptococcus bovis. 200010763992
unusual association: streptococcus bovis tricuspid endocarditis with atrial-septal aneurysm and patent foramen ovale.streptococcus bovis endocarditis is a frequent cause of streptococcal endocarditis and is associated with colonic tumours. the tricuspid valve is very rarely affected and its involvement is a complication which can lead to a less favourable outcome. we report the seventh case of tricuspid valve endocarditis due to s. bovis, and the first, to our knowledge, to be associated with an atrial-septal aneurysm and a patent foramen ovale. the underlying medical conditions and predisposing factors for de ...200010774003
immunization with a streptococcus bovis vaccine administered by different routes against lactic acidosis in sheep.streptococcus bovis is an important lactic acid bacterium in the rumen, which contributes to the development of lactic acidosis. this study was designed to test the efficacy of immunization with s. bovis primed either intramuscularly (i.m.) or intraperitoneally (i.p. ) against lactic acidosis. forty-five wethers were allocated to three treatment groups. two groups were injected with a s. bovis vaccine by either the i.m. or i.p. route for primary immunization; both groups were further immunized b ...200010775471
immunization with streptococcus bovis protects against lactic acidosis in sheep.lactic acidosis is a gastrointestinal disorder resulting from the rapid overgrowth of lactic acid-producing bacteria when ruminants are suddenly introduced to grain feed. the present study has investigated the ability of live and killed bacterial vaccines to reduce lactic acidosis in sheep, via a stimulation of specific antibody production against lactic acid-producing bacteria. forage-fed sheep were immunized with live or killed streptococcus bovis sb-5 vaccine, with or without adjuvant, via in ...200010775788
identification of virulence associated markers in the cell wall of pigeon streptococcus gallolyticus strains.the cell wall protein profiles of 56 isolates of streptococcus gallolyticus of differing virulence for pigeons were compared by sds-page. additionally, western blot analysis was performed on the cell wall proteins of 14 strains using sera of pigeons, experimentally infected with a(+)t1 or a(-)t2 strains of s. gallolyticus. the profile of silver stained gels exhibited a complex array of 20-50 bands ranging from less than 6.5-210kda. a band with molecular mass of 114kda was only observed in isolat ...200010781730
septic arthritis due to streptococcus bovis as presenting sign of 'silent' colon carcinoma. 200010788550
effect of steroidal saponin from yucca schidigera extract on ruminal microbes.the effects of steroidal saponins (sap) isolated from yucca schidigera extract on ruminal bacteria and fungi were investigated in pure culture studies. prevotella bryantii, ruminobacter amylophilus, selenomonas ruminantium and streptococcus bovis were cultured through ten 24-h transfers in ruminal fluid medium containing 0 or 25 microg sap ml-1 (measured as smilagenin equivalents). the four strains, each non-exposed or pre-exposed to sap, were then inoculated into medium containing 0 or 250 micr ...200010792550
effects of ammonia and amino acids on the growth and proteolytic activity of three species of rumen bacteria: prevotella albensis, butyrivibrio fibrisolvens, and streptococcus bovis.the addition of increasing physiological concentrations of ammonia or amino acids had distinct effects on the growth and proteolytic activity of streptococcus bovis jb1, prevotella albensis, and butyrivibrio fibrisolvens dsm3071. the growth of s. bovis and b. fibrisolvens was enhanced by nh(3) and aa, and that of p. albensis was reduced compared with a control with protein as the sole source of nitrogen. the proteolytic activity of s. bovis and p. albensis was reduced, but that of b. fibrisolven ...200010827280
streptococcus equinus endocarditis in a patient with pulmonary histiocytosis x. 200010866592
lack of gatc sites in the genome of streptococcus bovis bacteriophage f4.a strong bias against gatc sites was observed in the genome of phage f4, a lytic streptococcus bovis bacteriophage. only three gatc sites were found within the 60.4-kbp genome of this phage. the comparative lack of gatc sequences within the f4 genome was probably not due to dam methylation, as no modification within this site was detected using methylation-sensitive isoschizomer pair restriction endonuclease analysis. the short oligonucleotide composition of available s. bovis dna sequences sugg ...200010875285
effects of various adjuvants on efficacy of a vaccine against streptococcus bovis and lactobacillus spp in cattle.to determine efficacy of vaccines incorporating quila, alum, dextran combined with mineral oil, or freund adjuvant for immunization of feedlot cattle against streptococcus bovis and lactobacillus spp.200010895910
re: polytopic spondylodiskitis secondary to streptococcus bovis endocarditis 200010908709
[spondylodiscitis and streptococcus bovis meningitis: a rare association]. 200011234484
streptococcus bovis meningitis in an infant.streptococcus bovis is a nonenterococcal, group d streptococcus which has been identified as a causative agent for serious human infections, including endocarditis, bacteremia, and septic arthritis. several cases of adult s. bovis meningitis have been reported, usually in association with underlying disease. in the neonatal period, it is an uncommon agent of meningitis. we report, to our knowledge, the third documented case of neonatal s. bovis meningitis in the english language literature. as i ...200010618145
development of molecular methods for identification of streptococcus bovis from human and ruminal origins.streptococcus bovis has been identified as a causative agent in humans for a variety of diseases, including endocarditis, meningitis, and septicemia. identification of s. bovis strains of human origin in clinical settings has been problematic due to variations in biochemical tests as compared to ruminal strains of s. bovis, and other streptococcal species. dna-dna hybridization with chromosomal dna from various s. bovis strains indicates that strains of human origin are different from those of r ...200010620672
production of cytokines by monocytes, epithelial and endothelial cells activated by streptococcus bovis.there are numerous reports documenting the correlation between streptococcus bovis bacteraemia and endocarditis in conjunction with colonic diseases. the adherence of s. bovis to either buccal or intestinal epithelial cells seems to be the initial process in colonization and subsequent infection of the host, allowing further adhesion of s. bovis to either endothelial cells or extracellular matrix components which leads to infective endocarditis. bacterial entry at tumour sites is further assiste ...200010623439
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, ...200010629010
images in cardiology. perivalvar abscess of the mitral valve annulus with perforation owing to infective endocarditis. 200010677400
[streptococcus bovis endocarditis: a marker for colonic neoplasms]. 200011188480
antibody response in sheep following immunization with streptococcus bovis in different adjuvants.recent studies have shown that immunization with streptococcus bovis using freund's complete adjuvant (fca) may confer protection against lactic acidosis in sheep. the major objective of this study was to compare the antibody responses to s. bovis in a practically acceptable adjuvant (freund's incomplete adjuvant (fia); quila; dextran sulphate (dex); imject alum; or gerbu) and in fca. thirty-five sheep were randomly allocated to 7 treatment groups. six groups were immunized with s. bovis in an a ...200111214671
thoracic empyema associated with recurrent colon cancer: report of a case and review of the literature.many types of infections associated with colorectal cancer have been reported. here, we describe a rare case of thoracic empyema that was observed during immunotherapy for recurrent colon cancer. culture of the pleural fluid yielded streptococcus bovis, which is known to be associated with gastrointestinal lesions, especially colorectal malignancies. the possible correlation between these two clinical entities-empyema and colon cancer-is discussed.200111227950
[association of streptococcus bovis meningitis and colonic diverticulitis: favorable effect of corticotherapy?]. 200111229307
in vitro evidence for a bacterial pathogenesis of equine laminitis.utilizing an in vitro laminitis explant model, we have investigated how bacterial broth cultures and purified bacterial proteases activate matrix metalloproteinases (mmps) and alter structural integrity of cultured equine lamellar hoof explants. four gram-positive streptococcus spp. and three gram-negative bacteria all induced a dose-dependent activation of mmp-2 and mmp-9 and caused lamellar explants to separate. mmp activation was deemed to have occurred if a specific mmp inhibitor, batimastat ...200111240100
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 patients.to 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
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
regulation of h(+)-atpase synthesis in response to reduced ph in ruminal bacteria.the capacity of ruminal bacteria to regulate h(+)-atpase synthesis in response to reduced ph was investigated to explain acid tolerance. the activity of h(+)-atpase in streptococcus bovis, an acid-tolerant bacterium, was 2.2-fold higher at ph 4.5 than at ph 5.5. the increase in the amount of h(+)-atpase protein was similar, suggesting that the increase in h(+)-atpase activity is owing to the increase in h(+)-atpase synthesis. the level of atp-mrna at ph 4.5 was 2.5-fold higher than at ph 5.5, in ...200111136131
identification of bacteriocin-like inhibitors from rumen streptococcus spp. and isolation and characterization of bovicin 255.streptococci obtained from rumen sources were tested for the production of antibacterial compounds using a deferred-antagonism plating assay. of 35 isolates tested, 7 were identified that inhibited the growth of other streptococci. none of the inhibitory activity was due to bacteriophage. three isolates, lrc0253, lrc0255, and lrc0476, were selected for further characterization. analysis of 16s ribosomal dna indicated that lrc0476 was a strain of streptococcus bovis, while isolates lrc0253 and lr ...200111157218
nisin resistance of streptococcus bovis.the growth of streptococcus bovis jb1 was initially inhibited by nisin (1 microm), and nisin caused a more than 3-log decrease in viability. however, some of the cells survived, and these nisin-resistant cells grew as rapidly as untreated ones. to see if the nisin resistance was merely a selection, nisin-sensitive cells were obtained from agar plates lacking nisin. results indicated that virtually any nisin-sensitive cell could become nisin-resistant if the ratio of nisin to cells was not too hi ...200111157247
competition among three predominant ruminal cellulolytic bacteria in the absence or presence of non-cellulolytic bacteria.competition among three species of ruminal cellulolytic bacteria - fibrobacter succinogenes s85, ruminococcus flavefaciens fd-1 and ruminococcus albus 7 - was studied in the presence or absence of the non-cellulolytic ruminal bacteria selenomonas ruminantium or streptococcus bovis. co-cultures were grown under either batch or continuous conditions and populations were estimated using species-specific oligonucleotide probes to 16s rrna. the three cellulolytic species co-existed in cellobiose batc ...200111160797
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 bovis.to 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 pseudolongum.in 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
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