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strategies that ruminal bacteria use to handle excess carbohydrate.when ruminal bacteria have insufficient nitrogen and other nutrients, excess carbohydrate can be toxic. pure cultures that are nitrogen-limited can convert only some of the excess carbohydrate to intracellular polysaccharide, but this pool can be quickly saturated. fibrobacter succinogenes cultures that have excess cellobiose secrete glucose and cellotriose into the culture medium, and prevotella ruminicola produces methylglyoxal, a highly toxic substance that causes a dramatic decrease in viabi ...19989690652
streptococcus bovis and its association with bowel cancer. 19989669373
de novo synthesis of amino acids by the ruminal bacteria prevotella bryantii b14, selenomonas ruminantium hd4, and streptococcus bovis es1.the influence of peptides and amino acids on ammonia assimilation and de novo synthesis of amino acids by three predominant noncellulolytic species of ruminal bacteria, prevotella bryantii b14, selenomonas ruminantium hd4, and streptococcus bovis es1, was determined by growing these bacteria in media containing 15nh4cl and various additions of pancreatic hydrolysates of casein (peptides) or amino acids. the proportion of cell n and amino acids formed de novo decreased as the concentration of pep ...19989687438
pharmacokinetics and efficacy of amoxycillin in the treatment of an experimental streptococcus bovis infection in racing pigeons (columba livia).the pharmacokinetics of amoxycillin in pigeons (columba livia) and the efficacy of amoxycillin treatment in pigeon streptococcosis, were investigated. after intravenous administration of 150 mg.kg-1 amoxycillin, the drug plasma concentration-time profile fitted an open two-compartment model. amoxycillin was quickly cleared from the circulation with a mean half-life of 66 min and showed a distribution volume of 0.9 l.kg-1. the absolute oral bioavailability of amoxycillin was 50.1%. a 5-day drinki ...19989691852
intracellular alpha-amylase of streptococcus mutans.sequencing upstream of the streptococcus mutans gene for a ccpa gene homolog, regm, revealed an open reading frame, named amy, with homology to genes encoding alpha-amylases. the deduced amino acid sequence showed a strong similarity (60% amino acid identity) to the intracellular alpha-amylase of streptococcus bovis and, in common with this enzyme, lacked a signal sequence. amylase activity was found only in s. mutans cell extracts, with no activity detected in culture supernatants. inactivation ...19989721315
identification of streptococci from greek kasseri cheese and description of streptococcus macedonicus sp. nov.taxonomic studies were performed on some streptococcus-like organisms isolated from naturally fermented greek kasseri cheese. by sds-page analysis of whole-cell proteins the group was found to be quite different from streptococcus thermophilus. comparative 16s and 23s rrna sequence analyses showed that the isolates represent a new species within the genus streptococcus, where they are most closely related to the streptococcus bovis cluster. on the basis of these phylogenetic results and some phe ...19989731293
bacterial endocarditis associated with crescentic glomerulonephritis in a kidney transplant patient: first case report.endocarditis-induced crescentic glomerulonephritis is a well-described complication in nontransplant patients. its occurrence in transplant patients has not been reported to date.19989753349
a prospective controlled study of the association of streptococcus bovis with colorectal carcinoma.to investigate the ability of streptococcus bovis to colonise colorectal cancers.19989771449
phenotypic and phylogenetic characterization of ruminal tannin-tolerant bacteria.the 16s rrna sequences and selected phenotypic characteristics were determined for six recently isolated bacteria that can tolerate high levels of hydrolyzable and condensed tannins. bacteria were isolated from the ruminal contents of animals in different geographic locations, including sardinian sheep (ovis aries), honduran and colombian goats (capra hircus), white-tail deer (odocoileus virginianus) from upstate new york, and rocky mountain elk (cervus elaphus nelsoni) from oregon. nearly compl ...19989758806
[the microbiology of infectious endocarditis].if streptococci and staphylococci remain the main bacteria responsible for infective endocarditis (80%), the emergence of streptococcus bovis associated with intestinal lesions, the confirmation of the role of coxiella burnetii, and the discovery of the responsibility of bartonella sp in case of negative blood culture endocarditis have been the principal microbiological modifications during the last few years. blood cultures performed under the best technical conditions and the examination and c ...19989781112
[infectious endocarditis on permanent endocavitary stimulation leads: apropos of 2 cases].permanent endocavitary pacemaker lead infectious endocarditis is rare. two new cases are reported.19989775114
effects of laidlomycin propionate and monensin on glucose utilization and nutrient transport by streptococcus bovis and selenomonas ruminantium.the objective of this study was to compare the effects of laidlomycin propionate and monensin on cell growth, glucose fermentation, and glucose uptake in streptococcus bovis strain jb1 and selenomonas ruminantium strain hd4. experiments were also conducted to compare the effects of both ionophores on sodium-dependent serine transport and cell yield in s. bovis. batch cultures (500 ml) of each bacterium were grown on 3.6 g/l d-glucose in semidefined medium and treated with either 5 ppm monensin o ...19989814916
streptococcus bovis bacteremia: unusual complications.streptococcus bovis bacteremia is known to be related to neoplastic lesions of the colon. we describe a patient with several complications of s bovis bacteremia and adenocarcinoma of the colon--endocarditis, spondylodiskitis, and splenic abscess. we believe this is the eighth known case of endocarditis and diskitis caused by s bovis and the third case of endocarditis and splenic abscess by s bovis in a patient with adenocarcinoma of the colon.19989853733
[streptococcus bovis endocarditis. clinical and microbiological observations and review of the literature].fourteen patients (11 men and 3 women) with streptococcus bovis infective endocarditis have been observed by the infectious disease section of our department of clinical medicine between the years 1988-1998. the mean age was 63.2 years (range 35-85 years); 5 patients previously suffered valvular disease or had a valvular prosthesis, the infection involved the mitral valve in 6 patients, the aortic in 8, the prosthetic valve in 1. no patient developed cardiac failure or died during hospitalizatio ...19989844439
hydration of linoleic acid by bacteria isolated from ruminants.two strains of enterococcus faecalis isolated from the ovine rumen and known to hydrate oleic acid were shown to transform linoleic acid by hydration into two products. the products, identified as 10-hydroxy-12-octadecenoic acid and 13-hydroxy-9-octadecenoic acid, were formed during stationary phase in yields of 13% and 6% respectively. yields increased to 22% and 14% when culture conditions were optimised. to our knowledge, this is the first report of 13-hydroxy-9-octadecenoic acid production b ...19989868771
differentiation between streptococcus gallolyticus strains of human clinical and veterinary origins and streptococcus bovis strains from the intestinal tracts of ruminants.strains formerly identified as streptococcus bovis were allotted to two groups by sodium dodecyl sulfate-polyacrylamide gel electrophoresis analysis of whole-cell proteins. strains from humans with infections, mostly patients with endocarditis, and strains from pigeons with septicemia clustered with the recently described species streptococcus gallolyticus. the original s. bovis type strain and strains exclusively from ruminants formed the second cluster. the findings indicate that s. gallolytic ...19989817865
clinical and morphological characteristics in streptococcus bovis endocarditis: a comparison with other causative microorganisms in 177 cases.to compare the clinical and morphological characteristics of patients with streptococcus bovis endocarditis with those of patients with endocarditis caused by other microorganisms.19989875088
a bacteriocin-mediated antagonism by enterococcus faecium bc25 against ruminal streptococcus bovis.a bacteriocin-like activity produced by enterococcus faecium bc25, isolated from the the rumen of a cow, was partially purified and characterized. the active substance was prepared by ammonium sulfate and chloroform/methanol precipitation of culture supernatant. the bacteriocin was a protein of molecular mass 17.5 kda. activity was inactivated by trypsin and proteinase k. the bacteriocin bc25 inhibited growth of amylolytic ruminal strains of streptococcus bovis, including s. bovis ao 24/85. resu ...19989880931
manipulation of ruminal fermentation with organic acids: a review.the dicarboxylic acids aspartate, fumarate, and malate stimulate lactate utilization by the predominant ruminal bacterium, selenomonas ruminantium. malate stimulates lactate uptake by s. ruminantium more than does aspartate or fumarate, and it seems that malate and sodium are involved in stimulating lactate utilization by this bacterium. based on the ability of s. ruminantium to grow on malate in the presence of extracellular hydrogen and produce succinate, malate may be acting as an electron si ...19989928618
[streptococcus bovis endocarditis and colonic involvement].mcneal and blevins published the first report of streptococcus bovis infective endocarditis in 1945. in 1951, mccoy suggested, for the first time, that an association could exist between group d streptococcus infective endocarditis and colon carcinoma; this association would be demonstrated later (1977) by klein and unquestionably confirmed by several posterior works. due to a clinical case of streptococcus bovis infective endocarditis, which we had the opportunity of diagnosing, a review is mad ...19989973864
streptococcus bovis clone causing two episodes of endocarditis 8 years apart.a patient had endocarditis caused by streptococcus bovis twice 8 years apart. according to pulsed-field gel electrophoresis (pfge) the two isolates were identical. seven unrelated blood isolates of s. bovis yielded unique pfge patterns. considering this heterogeneous population structure our findings demonstrate the long-term persistence of an s. bovis clone in a patient with recurrent endocarditis.19999986877
a case of streptococcus bovis bacteremia and endocarditis. 19999989185
streptococcus equinus peritonitis in a capd patient. 19989932668
antimicrobial activity of sch27899 (ziracin), a novel everninomicin derivative, tested against streptococcus spp.: disk diffusion/etest method evaluations and quality control guidelines. the quality control study group.to combat the increasing rates of penicillin resistance among pneumococci and viridans group streptococci, new gram-positive active agents are needed to avoid the overuse of vancomycin. sch27899 is an everninomicin derivative with strong activity against glycopeptide-resistant enterococci, oxacillin-resistant staphylococci, and penicillin-resistant streptococci. this study tests the in vitro activity of sch27899 against 304 strains of streptococci and evaluates the quality of the agar dilution, ...19999990471
ultrastructure of surface components of streptococcus gallolytics (s. bovis) strains of differing virulence isolated from pigeons.virulence of streptococcus gallolyticus (s. bovis) strains isolated from pigeons is associated with the presence of the extracellular proteins a, t1, t2 and t3. based on the presence or absence of these proteins, six supernatant-phenotypes are distinguished. experimental infection studies have indicated that strains belonging to the a-t1, a+t1, a+t2 and a+t3 groups are highly virulent for pigeons, strains belonging to the a-t3 groups are moderately virulent and a-t2 strains are of low virulence. ...199910075416
pacemaker-related endocarditis. report of 7 cases and review of the literature.we report on 7 patients with pacemaker endocarditis diagnosed during the workup of long-standing fever. persistent positive blood cultures and echocardiography led to the diagnosis in 6 patients whereas autopsy was diagnostic in another. causative microorganisms were staphylococcus epidermidis (3), staphylococcus lugdunensis (1), pseudomonas aeruginosa (1), streptococcus bovis (1), and streptococcus mitis-streptococcus sanguis (1). pulmonary embolism was present in nearly 50% of the cases, a fig ...199810085483
[bacteremia by streptococcus bovis in a patient with chronic liver disease without colon disease]. 199910193099
gc-ms analysis of diaminopimelic acid stereoisomers and amino acid enantiomers in rumen bacteria.the amounts and the configuration of the stereoisomers of 2,6-diaminopimelic acid (dap) and the enantiomeric content of other amino acids were determined in five individual species (fibrobacter succinogenes, streptococcus bovis, selenomonas ruminantium, prevotella ruminicola and anaerovibrio lipolytica) of rumen bacteria, and in samples of mixed rumen bacteria isolated from sheep. the separation and quantification of the dap stereoisomers was achieved by gas chromatography (gc) of trifluoroacety ...199910191943
structure and transcriptional regulation of the gene encoding pyruvate formate-lyase of a ruminal bacterium, streptococcus bovis.the gene (pfl) encoding pyruvate formate-lyase (pfl) from streptococcus bovis was sequenced. the deduced amino acid sequence of pfl was similar to streptococcus mutans pfl, and included the conserved regions necessary for free-radical formation and a catalytic site. the pfl of s. bovis appeared to be a free-radical-containing enzyme because of its dioxygen sensitivity and its amino acid sequence similarity with the escherichia coli enzyme. the pfl mrna of s. bovis was approximately 2.3 kb and wa ...199910206694
overwhelming streptococcus bovis infection as a cause of intrauterine death. 199910090518
spectrum and antimicrobial activity of alexomycin (pnu-82, 127), a peptide compound projected for use in animal health.alexomycin (pnu-82, 127) is a thiopeptide antimicrobial complex intended for veterinary practice that belongs to a series of cyclic peptides produced by streptomyces arginensis. mics against selected routine and fastidious clinical isolates of animal and human origin were determined by broth microdilution or agar dilution reference methods. alexomycin was active against gram-positive pathogens such as oxacillin-susceptible and -resistant staphylococcus aureus and coagulase-negative staphylococci ...199910092967
subarachnoid hemorrhage due to septic embolic infarction in infective endocarditis.during antibiotic therapy, a 56-year-old man with a streptococcus bovis endocarditis developed an infarction of the right middle cerebral artery (mca). thirty hours after stroke onset, cranial computed tomography controls demonstrated a secondary subarachnoid hemorrhage, marked in the cistern of the right mca. the latent period, cerebrospinal fluid analysis, angiographic and pathologic findings favor the assumption of a pyogenic arterial wall necrosis of the mca due to a septic embolus. this pat ...199910207213
streptococcus bovis bacteremia in patients infected with the human immunodeficiency virus: case reports and literature review. 199910219582
bacterial complications of strongyloidiasis: streptococcus bovis meningitis.we report the case of a 64-year-old veteran who had streptococcus bovis meningitis as a result of a long latent strongyloides infection that became acute when he was treated with prednisone. we reviewed 38 reported cases of serious bacterial infections associated with strongyloidiasis. patients most frequently had nonspecific gastrointestinal symptoms. of these 38 patients, 21 (55%) had meningitis, and 28 (73%) had bacteremia that was polymicrobial in 3 cases (8%). other sites of infection inclu ...199910414486
immunisation against lactic acidosis in cattle.the present study was designed to investigate the efficacy of control of lactic acidosis by immunisation against lactic acid-producing bacteria, streptococcus bovis and lactobacillus. ten steers were allocated to two treatment groups. one group was immunised with a vaccine containing s. bovis (strain sb-5) and lactobacillus (lb-27) cells, and the other was a non-immunised control group. the vaccine, using freund's complete adjuvant for primary immunisation and freund's incomplete adjuvant for bo ...199910425243
bacteremia complicated by vertebral osteomyelitis due to streptococcus bovis.the diagnosis of vertebral osteomyelitis is easily missed, especially in the elderly in whom clinical signs of bacteremia might not be manifest. spontaneously occurring disc-space infection in adults often has an insidious presentation. the infecting microorganism can be difficult to identify. although discitis due to streptococcus bovis is occasionally found, it is often difficult to fully confirm the diagnosis. here, a case of vertebral osteomyelitis due to this microorganism is reported.199910421046
streptococcus waius sp. nov., a thermophilic streptococcus from a biofilm.thermophilic streptococci were isolated from biofilms on stainless steel samples exposed to pasteurized skimmed milk and from dairy products from a dairy manufacturing plant. the phenotypic characters of these isolates were distinct from those of other thermophilic streptococci of dairy origin (streptococcus thermophilus and streptococcus bovis). genotypic data [restriction endonuclease analysis, ribotyping, random amplified polymorphic dna (rapd) profiles, dna-dna hybridization and g + c conten ...199910319500
use of corticosteroids in glomerulonephritis related to infective endocarditis: three cases and review.we report the cases of three patients treated for infective endocarditis (ie) for whom corticosteroids were added to the antibiotic treatment. they all had clinical and biological evidence of immune-mediated glomerulonephritis. the microorganisms responsible for ie were coxiella burnetii, streptococcus bovis, and cardiobacterium hominis. median duration of ie before antimicrobial therapy was 7 months. in all patients, renal function deteriorated despite appropriate antimicrobial treatment for a ...199910452634
spontaneous peritonitis due to streptococcus bovis. 199910445588
streptococcal meningitis in adult patients: current epidemiology and clinical spectrum.streptococci other than streptococcus pneumoniae are a rare cause of bacterial meningitis in adults. we report 29 cases of streptococcal meningitis (1977-1997). the patients comprised 19 men and 10 women, with a mean age +/- standard deviation of 47 +/- 18 years. nine cases were secondary to neurosurgical procedures, seven to brain abscess, five to cerebrospinal fluid pericranial fistula, and three to endocarditis. causative microorganisms included the following: viridans group streptococci, 20 ...199910452643
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
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
polytopic spondylodiscitis secondary to streptococcus bovis endocarditis. 199910461490
[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
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
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
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
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
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
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
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
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
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
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
infective endocarditis in a tertiary-care hospital in southern israel.during the years 1980-1994, 84 patients were treated in our institution due to suspected infective endocarditis (ie). seventy-one of these episodes occurring in 71 patients, classified definite or possible according to the duke criteria, were retrospectively analyzed in this study. there were 52 cases of native valve endocarditis, 7 cases of early prosthetic valve endocarditis, and 12 cases of late prosthetic valve endocarditis. the incidence of ie did not change significantly during the study p ...199810641529
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
images in cardiology. perivalvar abscess of the mitral valve annulus with perforation owing to infective endocarditis. 200010677400
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
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
streptococcus equinus endocarditis in a woman with pulmonary histiocytosis. 200010697059
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
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
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
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 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
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
[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
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
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
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
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
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
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
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
[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
[association of streptococcus bovis meningitis and colonic diverticulitis: favorable effect of corticotherapy?]. 200111229307
[spondylodiscitis and streptococcus bovis meningitis: a rare association]. 200011234484
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
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
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