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are ruminal bacteria protected against environmental stress by plant antioxidants?to investigate the activity response of the antioxidant enzymes superoxide dismutase (sod) and glutathione peroxidase (gshpx) of the rumen bacterium streptococcus bovis following exposure to mercury(ii) chloride (hgcl(2) in the presence of plant antioxidants.200212358692
what happened to the streptococci: overview of taxonomic and nomenclature changes.since the division of the streptococcus genus into enterococci, lactococci, and streptococci in 1984, many changes in the nomenclature and taxonomy of the streptococcus genus have taken place. the application of genetic comparisons has improved the proper classification of the different species. the lancefield system of serogrouping the streptococci by the expression of beta-hemolysis on blood agar plates is still very useful for the identification of streptococci for patient management. the lan ...200212364372
streptococcus bovis meningitis in an otherwise healthy infant. 200212365316
streptococcus bovis bacteremia and fetal death.preterm premature rupture of membranes leading to intraamniotic infection and fetal death may be due to unusual bacterial species.200212423832
bovicin hc5, a bacteriocin from streptococcus bovis hc5.previous work indicated that streptococcus bovis hc5 had significant antibacterial activity, and even nisin-resistant s. bovis jb1 cells could be strongly inhibited. s. bovis hc5 inhibited a variety of gram-positive bacteria and the spectrum of activity was similar to monensin, a commonly used feed additive. the crude extracts (ammonium sulfate precipitation) were inactivated by pronase e and trypsin, but the activity was resistant to heat, proteinase k and alpha-chymotrypsin. most of the antiba ...200212427926
role of aminoglycosides in the treatment of bacterial endocarditis.aminoglycosides are often used in combination with glycopeptides and beta-lactams for the treatment of bacterial endocarditis caused by alpha-haemolytic streptococci, staphylococci and enterococci. recommendations on dosing and duration of aminoglycoside therapy vary; we detail the laboratory and clinical evidence base for the treatment regimens advised. a number of deficiencies in the published guidelines are highlighted, as is the limited evidence base upon which many of the regimens are recom ...200211864943
streptococcus bovis meningitis in a healthy adult patient.we describe the first case in the english language of streptococcus bovis meningitis in a 45-y-old patient without any underlying disease or predisposing condition. s. bovis biotype ii was isolated from his spinal fluid and blood. the illness was community-acquired and was clinically and biologically similar to disease caused by the classical meningeal pathogens. the patient was cured after 10 d of therapy with ceftriaxone and, 2.5 y later, is currently healthy. as a result of this case and a si ...200211874167
streptococcus bovis meningitis in a neonate with ivemark syndrome.although streptococcus bovis infections in adults are associated with endocarditis and bowel neoplasms, s. bovis-associated meningitis is rare in neonates. we describe the case of a neonate with ivemark syndrome, which possibly predisposed her to infection with this bacterium.200211874168
discitis associated with pregnancy and spinal anesthesia.discitis (inflammation of the intervertebral disk) most commonly develops as a rare complication of bacterial infection or chemical or mechanical irritation during spine surgery (1) with a postoperative incidence of 1%-2.8% (2). it is also a complication of discography-the intradiscal injection of saline or contrast material (3). the incidence of postdiscography discitis is 1%-4% (3); no cases have been reported when prophylactic antibiotics have been used, supporting the theory of bacterial con ...200211812710
microbial diversity of a mesophilic hydrogen-producing sludge.a hydrogen-producing sludge degraded 99% of glucose at 36 degrees c and ph 5.5, producing a methane-free biogas (comprising 64% hydrogen) and an effluent comprising mostly butyrate, acetate, and ethanol. the yield was 0.26 l h2 g(-1) glucose and the production rate per gram of volatile suspended solids was 4.6 1 h2 day(-1). a 16s rdna library was constructed from the sludge for microbial species determination. a total of 96 clones were selected for plasmids recovery, screened by denaturing gradi ...200211833529
isolated cerebrospinal fluid eosinophilia due to streptococcus bovis meningitis in an infant. 200212725215
[meningitis due to streptococcus bovis biotype ii. clinical case and review of the literature]. 200212433359
effects of pneumoperitoneum on hemodynamic and systemic immunologic responses to peritonitis in pigs.experimental evidence supporting the safety of laparoscopic intervention during sepsis is limited. the purpose of this study was to evaluate the effects of pneumoperitoneum on immunologic and hemodynamic responses to peritoneal sepsis.200212443712
the effect of bovicin hc5, a bacteriocin from streptococcus bovis hc5, on ruminal methane production in vitro.methane represents a loss of feed energy to ruminant animals, and nutritionists have sought methods of inhibiting ruminal methane production. when mixed ruminal bacteria (approximately 400 mg protein ml(-1)) from a cow fed timothy hay were incubated in vitro with carbon dioxide and hydrogen (0.5 atm) for less than 8 h, the first-order rate of methane production was 17 micromol ml(-1). semi-purified bacteriocin from streptococcus bovis hc5 (bovicin hc5) inhibited methane production, by as much as ...200212445645
streptococcus bovis bacteremia from a venous access port in a patient with aids.we report the first case of s. bovis bacteremia related to endoluminal colonization of a venous access port in a setting of advanced hiv infection, neutropenia and co-infection with hbv. the patient had no bowel abnormalities. the clinical picture was mild and was resolved by removal of the device.200212477330
infected left atrial myxoma.a 47-year-old japanese woman with a continuing high fever was promptly diagnosed as having infected atrial myxoma one day after admission based on transthoracic echocardiographic findings and positivity for bacteria in blood culture. the mass was removed by an urgent open heart surgery. histopathological examination confirmed that this mass was a myxoma with gram-positive bacterial colonies. generally, antemortem diagnosis is difficult and there is a high mortality of patients with infected myxo ...200212487167
lotus corniculatus condensed tannins decrease in vivo populations of proteolytic bacteria and affect nitrogen metabolism in the rumen of sheep.condensed tannins in forage legumes improve the nutrition of sheep by reducing ruminal degradation of plant protein and increasing crude protein flow to the intestine. however, the effects of condensed tannins in forage legumes on rumen bacterial populations in vivo are poorly understood. the aim of this study was to investigate the specific effects of condensed tannins from lotus corniculatus on four proteolytic rumen bacteria in sheep during and after transition from a ryegrass (lolium perenne ...200212489781
[metabolism of rumen microbial populations formed on biosubstrates with different assimilation under the effect of pentachlorophenol].it has been established that metabolism of mixed microbial population formed on easy assimilated sources of energy and nitrogen (concentrate diet) progressed on higher level. there is increase of amilolytic activity, formation of lactate, ammonia, low molecular carbonic acids with predomination of propionate molar fraction. the increased resistance to effect of pentachlorophenol (pcp) is characteristic nature of the latter. the role of the most resistant synthrophic bacteria to pcp increases. th ...200212916235
the binding and degradation of nisin by mixed ruminal bacteria.we found that nisin catalyzed potassium efflux from glycolyzing streptococcus bovis jb1 cell suspensions and that the steady state concentration of residual potassium was dependent upon the amount of nisin added. the relationship between nisin concentration and potassium depletion was a saturation function that had considerable cooperativity. by pre-incubating mixed ruminal bacteria with nisin and removing them prior to s. bovis jb1 addition, it was possible to estimate the ability of mixed rumi ...200219709293
septic arthritis due to streptococcus bovis in a patient with cirrhosis of enolic etiology.we present a case of bacteremia and septic arthritis due to streptococcus bovis biotype i after shock, in a patient with liver cirrhosis of enolic etiology. diagnosis was made based on a clinical setting of fever and a painful shoulder. the presence of colonic neoplasia was ruled out in this patient and the bacteremia developed without endocarditis.200312952512
antimicrobial resistance patterns of vancomycin-resistant streptococcus equinus isolated from animal foods and epidemiological typing of resistant s. equinus by microbial uniprimer kit.raw milk samples, and cow and chicken intestines were tested to isolate vancomycin-resistant, gram-positive bacteria. from these samples, we isolated seven vancomycin-resistant streptococcus equinus, two vancomycin-resistant viridans streptococcus and two vancomycin-resistant enterococcus faecium. the mics of several antibiotics, including vancomycin, against these strains were tested. seven isolates of s. equinus showed high level resistance to vancomycin and teicoplanin (>100 microg/ml). the c ...200312967199
geographical difference of disease association in streptococcus bovis bacteraemia.from 1996 to 2001, 48 streptococcus bovis strains were isolated from blood cultures of 37 patients in one hospital. median patient age was 68 years (range: 1 day-88 years). the male : female ratio was 23 : 14. most patients (97 %) had underlying diseases, including biliary tract disease in 14 (38 %), diabetes mellitus in 12 (32 %), liver parenchymal disease in seven (19 %), carcinoma of the colon in four (11 %) and other malignancies in four (11 %). no infective foci (indicative of primary bacte ...200312972586
verrucous endocarditis associated with streptococcus bovis in mink (mustela vison).between 1998 and 2001, mortalities due to verrucous endocarditis were experienced at several mink farms. gram-positive cocci were isolated from the endocardium of all the animals examined but not always from other internal organs. almost all the isolates were identified as streptococcus bovis and only a few isolates belonged to other streptococcus species. typing by pulsed-field gel electrophoresis of a selection of isolates revealed several patterns and several different clones. attempts to rep ...200312974338
late infection of a total knee arthroplasty with streptococcus bovis in association with carcinoma of the large intestine.infection of a total knee arthroplasty with streptococcus bovis in a 76-year-old man that led to the diagnosis of a bowel carcinoma is reported. investigation revealed a malignancy in the ascending colon with extension into the adrenal gland. s bovis in conjunction with colonic neoplasia has been reported in several orthopedic conditions: vertebral osteomyelitis, discitis, lateral neck abscess, and osteomyelitis of the ileum. the relationship of s bovis to endocarditis, meningitis, brain abscess ...200314513461
infective endocarditis due to streptococcus bovis in a series of nonaddict patients: clinical and morphological characteristics of 20 cases and review of the literature.controversy frequently exists about the actual frequency of streptococcus bovis infective endocarditis (ie), its incidence of malignancy and its outcome. consequently, the characteristics of s bovis ie were examined in an unselected population of nondrug-addicted patients. the literature was also reviewed.200314532939
inhibition of listeria monocytogenes by bovicin hc5, a bacteriocin produced by streptococcus bovis hc5.cattle can be infected with listeria monocytogenes by consuming contaminated plant materials, soil or silage, and farmers have sought ways of preventing this contamination. recent work indicated that streptococcus bovis hc5 produced a bacteriocin (bovicin hc5) that could inhibit a variety of gram-positive bacteria, and we examined the ability of bovicin hc5 to inhibit 10 strains of l. monocytogenes that had been isolated from plant materials, soil, silage and infected cattle. growth experiments ...200314580975
[splenic abscess by streptococcus bovis. first case in spain and literature review]. 200314599404
a case of septicaemia, meningitis and pneumonia caused by streptococcus bovis type ii.we present a case of septicaemia, pneumonia and meningitis due to streptococcus bovis type-ii in a patient who had undergone a total hip prosthesis under general anaesthesia three weeks earlier. this organism is an uncommon human pathogen that sometimes causes bacteraemia and endocarditis and is usually connected with colon pathology and dental procedures. in the reported case, there were no risk factors for s. bovis infection except for the hip operation. s. bovis type ii sensitive to penicilli ...200314627189
[streptococcus bovis infectious endocarditis: clinical and epidemiological characteristics].this paper shows our experience concerning the study of streptococcus bovis infectious endocarditis (ei): 47 patients, with no prior history of iv drug abuse (ntd), who suffered ei caused by streptococcus bovis were excerpted from a case record of 1053 cases with diagnosis of ei defined in accordance with duke's hospital criteria. for each patient we considered age, sex, complications, echocardiographic findings, antibiotic therapy, eventual heart-surgery and final outcome of the disease. we the ...200314988666
factors affecting the antibacterial activity of the ruminal bacterium, streptococcus bovis hc5.streptococcus bovis hc5 inhibits a variety of s. bovis strains and other gram-positive bacteria, but factors affecting this activity had not been defined. batch culture studies indicated that s. bovis hc5 did not inhibit s. bovis jb1 (a non-bacteriocin-producing strain) until glucose was depleted and cells were entering stationary phase, but slow-dilution-rate, continuous cultures (0.2 h(-1)) had as much antibacterial activity as stationary-phase batch cultures. because the activity of continuou ...200312432458
[infectious endocarditis. a study of 50 patients in a non-university hospital].the authors report the results of a single centre study of 50 consecutive patients (average age 66 +/- 14 years; 36 men), admitted between 1992 and 2001 to a peripheral hospital for infectious endocarditis (ie). the median interval to diagnosis was 57 days. there was an underlying cardiac disease in 52% of cases, usually valvular (42%). the site of the ie was the mitral valve in 21 cases, the aortic valve in 19 cases, mitro-aortic valves in 5 cases, native tricuspid valves in 2 cases and pacing ...200312741305
infectious endocarditis from streptococcus bovis associated with colonic carcinoma: case report and literature review.many studies in the literature have warned of the need for investigation of colonic lesions among patients, especially elderly ones, who have bacteremia and/or endocarditis from streptococcus bovis. bacteremia and infectious endocarditis from streptococcus bovis may be related to the presence of neoplastic lesions in the large intestine and hepatic disease.200312778310
expression of ruminococcus albus xylanase gene ( xyna) in streptococcus bovis 12-u-1.the objective of this study was to ligate the xylanase gene a ( xyna) isolated from ruminococcus albus 7 into the promoter and signal-peptide region of the lichenase [beta-(1,3-1,4)-glucanase] gene of streptococcus bovis jb1. this fusion gene was inserted into the psbe11 vector, and the resulting recombinant, plasmid pxa, was used to transform s. bovis 12-u-1 cells. the transformant, s. bovis 12uxa, secreted the xylanase, which was stable against freeze-thaw treatment and long-time incubation at ...200312783197
ischemic stroke and splenic rupture in a case of streptococcus bovis endocarditis.a 58-year-old man with an acute stroke suffered from splenic rupture. streptococcus bovis was found in blood cultures, and gram-negative cocci were found in the infarcted spleen. hemorrhagic transformation of the stroke occurred. echocardiography showed aortic endocarditis. cardiac surgery was not performed because of concern about cerebral bleeding. the patient died due to cerebral rehemorrhage after 3 weeks.200312791896
reappraisal of the taxonomy of the streptococcus bovis/streptococcus equinus complex and related species: description of streptococcus gallolyticus subsp. gallolyticus subsp. nov., s. gallolyticus subsp. macedonicus subsp. nov. and s. gallolyticus subsp. pasteurianus subsp. nov.'streptococcus bovis/streptococcus equinus' is a large bacterial complex including different species frequently isolated from infections of humans (streptococcus gallolyticus, streptococcus infantarius) or animals (s. bovis, s. equinus, streptococcus alactolyticus). the separation of s. bovis into three different biotypes has been partially correlated with genetic differentiation. in addition, recent advances in bacterial phylogeny have led to the inclusion of streptococcus macedonicus and strep ...200312807180
continuous ambulatory peritoneal dialysis-related peritonitis caused by streptococcus bovis.the first case of streptococcus bovis peritonitis associated with continuous ambulatory peritoneal dialysis (capd) in a 40-year-old chinese woman suffering from systemic lupus erythematosus is reported. streptococcus bovis is part of the normal flora in the human intestine and, less commonly, the female genital tract. being a rare cause of peritonitis, the possible link between genital tract colonization by streptococcus bovis and retrograde invasion of the peritoneal cavity is postulated to be ...200312827532
neonatal sepsis caused by streptococcus bovis variant (biotype ii/2): report of a case and review.streptococcus bovis is an uncommon cause of infection in neonates. however, s. bovis is capable of causing fulminant neonatal sepsis or meningitis that is indistinguishable clinically from that caused by group b streptococcus. s. bovis and s. bovis variant (sometimes referred to as s. bovis biotypes i and ii, respectively) are phenotypically similar but may be differentiated by expanded testing. in adults, specific associations between disease states and different biotypes of s. bovis are appare ...200312843113
adrenomedullin expression by gastric epithelial cells in response to infection.many surface epithelial cells express adrenomedullin, a multifunctional peptide found in a wide number of body and cell systems. recently, we and others have proposed that adrenomedullin has an important novel role in host defense. this peptide has many properties in common with other cationic antimicrobial peptides, including the human beta-defensins. upon exposure of human gastric epithelial cells to viable cells of invasive or noninvasive strains of helicobacter pylori, escherichia coli, salm ...200312853384
microbial and physiological characterization of weakly amylolytic but fast-growing lactic acid bacteria: a functional role in supporting microbial diversity in pozol, a mexican fermented maize beverage.pozol is an acid beverage obtained from the natural fermentation of nixtamal (heat- and alkali-treated maize) dough. the concentration of mono- and disaccharides from maize is reduced during nixtamalization, so that starch is the main carbohydrate available for lactic acid fermentation. in order to provide some basis to understand the role of amylolytic lactic acid bacteria (alab) in this fermented food, their diversity and physiological characteristics were determined. forty amylolytic strains ...200312902217
ability of lysozyme and 2-deoxyglucose to differentiate human and bovine streptococcus bovis strains.human and bovine streptococcus bovis strains had the same 16s ribosomal dna restriction fragment length polymorphism and often had the same patterns of starch, mannitol, lactose, and raffinose utilization. pcrs of box sequences differed, but numerical analyses indicated that some human strains clustered with bovine strains. however, human and bovine strains had distinctly different sensitivities to lysozyme and 2-deoxyglucose.200312904427
establishing populations of megasphaera elsdenii ye 34 and butyrivibrio fibrisolvens ye 44 in the rumen of cattle fed high grain diets.to determine whether megasphaera elsdenii ye34 (lactic acid degrader) and butyrivibrio fibrisolvens ye44 (alternative starch utilizer to streptococcus bovis) establish viable populations in the rumen of beef cattle rapidly changed from a forage-based to a grain-based diet.200312911711
molecular diagnosis of infective endocarditis by pcr amplification and direct sequencing of dna from valve tissue.we used broad-range eubacterial pcr amplification followed by direct sequencing to identify microbial pathogens in heart valve material from 29 patients with histologically confirmed infective endocarditis and 23 patients free of infective endocarditis. microorganisms cultured by conventional techniques matched those identified by pcr in 21 cases. pcr alone identified the causative agent in three cases (streptococcus bovis, staphylococcus cohnii, and coxiella burnetii), allowing better patient m ...200312574279
diet influences the ecology of lactic acid bacteria and escherichia coli along the digestive tract of cattle: neural networks and 16s rdna.in this manuscript, the authors have sought to gain a better understanding of the interactions between escherichia coli and lactic acid bacteria (lab) isolated from rogossa mrs agar along the digestive tract of grain- and forage-fed cattle. e. coli from cattle receiving a high-grain diet were more numerous (p<0.05) than from the high-forage diet and the highest numbers were in the faeces. isolates on rogossa mrs agar were always greater in the high-grain diet (p<0.05) and contained a significant ...200312576580
molecular characterization of hpr and related enzymes, and regulation of hpr phosphorylation in the ruminal bacterium streptococcus bovis.molecular properties of hpr, enzyme i, and hpr kinase in streptococcus bovis, and the regulation of hpr phosphorylation were examined. the genes encoding hpr (ptsh) and enzyme i (ptsi) were found to be cotranscribed. two transcriptional start sites were detected in a region upstream of the hpr kinase gene (hprk). hpr kinase had both hpr-phosphorylating and hpr-dephosphorylating activities. the importance of phosphorylation of ser-46 in hpr was shown by using a mutant hpr in which ser-46 was repl ...200312610726
[streptococcus bovis endocarditis - predictor of colonic carcinoma? ].the association of streptococcus bovis endocarditis with colonic neoplasia is classically described and exceeds 50 percent. the prevalence of streptococcus bovis in fecal cultures from patients with carcinoma of the colon is significantly increased (56%) as compared to that in controls (10%) and also in patients with inflammatory bowel disease (28%). streptococcus bovis endocarditis is relatively benign, but it stresses the frequency of the associated colonic carcinoma, requiring colonoscopy and ...200312626871
no synthesis in human saliva.human saliva contains nitrate that is converted into nitrite by the activity of facultative, anaerobic bacteria of the oral cavity. nitrite can be reduced to no in the acidic gastric milieu; some no may also form in the mouth at acidic ph values. in this paper, we show that bacteria (s. salivarius, s. mitis and s. bovis) isolated from saliva, may contribute to no production in human saliva. no formation by bacteria occurs at neutral ph values and may contribute to the antibacterial activity of s ...200312653214
identification of equine cecal bacteria producing amines in an in vitro model of carbohydrate overload.acute laminitis has been associated with the overgrowth of gram-positive bacteria within the equine hindgut, causing the release of factor(s) leading to ischemia-reperfusion of the digits. the products of fermentation which trigger acute laminitis are, as yet, unknown; however, vasoactive amines are possible candidates. the objectives of this study were to use an in vitro model of carbohydrate overload to study the change in populations of cecal streptococci and lactobacilli and to establish whe ...200312676687
streptococcus bovis revisited: a clinical review of 81 bacteremic episodes paying special attention to emerging antibiotic resistance.following 2 cases of streprococcus bovis endocarditis with a high level of resistance to clindamycin during 2002, the authors reviewed their clinical experience with s. bovis bacteremia during 2 periods, starting in 1980. 81 episodes of s. bovis bacteremia represented approximately 1% of all episodes of bacteremia. in 32 (40%) cases the bacteremia represented endocarditis, in 15 (19%) the bacteremia originated from sick bowel, 11 (14%) were suspected to arise from urinary tract infection, 10 (12 ...200312693556
effect of ph on the activity of bovicin hc5, a bacteriocin from streptococcus bovis hc5.the bacteriocin, bovicin hc5, catalyzed potassium efflux from streptococcus bovis jb1, and this activity was highly ph dependent. when the ph was near neutral, glucose-energized cells were not affected by bovicin hc5, but the intracellular steady-state concentration of potassium decreased at acidic ph values. the idea that ph was affecting bovicin hc5 binding was supported by the observation that acidic ph also enhanced the efflux of potassium from non-energized cells that had been loaded with p ...200414769462
[streptococcus bovis septicemia and bifocal spondylodiscitis]. 200415043503
[chronic cough as presentation of subacute bacterial endocarditis]. 200415043499
molecular study on cloned endoglucanase gene from rumen bacterium.an endoglucanase gene was subcloned from anaerobic rumen bacterium ruminococcus flavefaciens strain 17. to express endoglucanase gene in escherichia coli and streptococcus bovis jb1, an endoglucanase gene fragment was inserted into pva838-based shuttle vectors. removal of endoglucanase gene promoter and expression of endoglucanase by promoter of s. bovis jb1 alpha-amylase gene (pacmcs) was also achieved. survival of constructs pvacmci, ptacmc and pacmcs, which carry endoglucanase gene, and stabi ...200415925902
[multilobular liver abscess due to streptococcus bovis]. 200415738851
causative organisms of infective endocarditis according to host status.a prospective study of infective endocarditis (ie) was conducted between 1994 and 2000 in marseilles, france, and included 170 definite cases diagnosed with the use of modified duke criteria. classification of ie based on the aetiological agent was related to epidemiological characteristics, including age, gender and the nature of the injured valve. enterococci and streptococcus bovis were identified more frequently in older subjects (p 0.02), and s. bovis was also associated with mitral valve i ...200415059118
non-life-threatening sepsis: report of two cases.streptococcus bovis is one of the nonenterococcal species included among the streptococci group d. it is part of the normal bowel flora in humans and animals, but it is also responsible for infectious diseases (10-15% of all cases of bacterial endocarditis). many cases of bacteremia and metastatic abscesses (spleen, liver, soft tissues, bone, meninges, endocardium) caused by s. bovis were reported as associated with digestive tract diseases, mainly colonic disease, and, in particular colonic neo ...200415166750
ocular symptoms and signs as presenting features of endocarditis caused by streptococcus bovis ii. 200415566065
molecular characterization and transcription of the luxs gene that encodes luxs autoinducer 2 synthase in streptococcus bovis.presence of the luxs gene that encodes luxs autoinducer 2 (ai-2) synthase in streptococcus bovis was demonstrated, and the molecular properties and transcription of the gene were examined. the s. bovis luxs was transcribed in a monocistronic fashion. intracellular luxs-mrna increased sharply during the initial exponential growth, and decreased abruptly after the middle exponential phase. the large drop in luxs transcription began before the glucose supply to cells decreased or the growth rate de ...200415486712
molecular characterization of ccpa and involvement of this protein in transcriptional regulation of lactate dehydrogenase and pyruvate formate-lyase in the ruminal bacterium streptococcus bovis.a ccpa gene that encodes global catabolite control protein a (ccpa) in streptococcus bovis was identified and characterized, and the involvement of ccpa in transcriptional control of a gene (ldh) encoding lactate dehydrogenase (ldh) and a gene (pfl) encoding pyruvate formate-lyase (pfl) was examined. the ccpa gene was shown to be transcribed as a monocistronic operon. a catabolite-responsive element (cre) was found in the promoter region of ccpa, suggesting that ccpa transcription in s. bovis is ...200415345406
efficient production of l-(+)-lactic acid from raw starch by streptococcus bovis 148.streptococcus bovis 148 was found to produce l-(+)-lactic acid directly from soluble and raw starch substrates at ph 6.0. productivity was highest at 37 degrees c, with 14.7 g/l lactic acid produced from 20 g/l raw starch. the yield and optical purity of l-lactic acid were 0.88 and 95.6%, respectively.200416233654
influence of dipeptidyl peptidase inhibitors on growth, peptidase activity, and ammonia production by ruminal microorganisms.the aim was to investigate known and potential new inhibitiors of dipeptidyl peptidases (dpp) for their effects on ruminal microorganisms. gly-phe diazomethylketone (gpd), ala-ala chloromethylketone (aac), benserazide (dl-serine 2-(2,3,4- trihydroxybenzyl) hydrazide), and diprotin a (ile-pro-ile) inhibited dpp activities of prevotella albensis, p. ruminicola, p. bryantii, p. brevis, and mixed ruminal microorganisms, though incompletely and, except for diprotin a, without absolute specificity for ...200415297916
improved survival in experimental sepsis with an orally administered inhibitor of apoptosis.the pathophysiology of sepsis involves excessive lymphocyte apoptosis, which correlates with adverse outcomes, and disordered cytokine production, which may promote host injury. as the protease inhibitor (pi) class of antiretroviral agents is known to prevent apoptosis in vitro, we evaluated their effect on survival, lymphocyte apoptosis, and consequent cytokine production in mice with sepsis induced by cecal ligation and perforation. mice pretreated with pis have improved survival (67%; p<0.000 ...200415284218
new group d streptococcal species.the heterogeneity of group d streptococci led to the identification of various biotypes of streptococcus equinus and streptococcus bovis and to the description of new species. the objective of the present study was to improve the phenotypic delineation between species and to clarify their respective phylogenetic position.200415232206
[fever, malaise and new onset mitral valve insufficiency. subacute streptococcus bovis mitral valve endocarditis ].a 62-year-old patient with low grade fever, fatigue, arthralgia and newly discovered mitral regurgitation was diagnosed with subacute endocarditis. streptococcus bovis grew from all six blood culture bottles. streptococcus bovis is known to be associated with gastrointestinal neoplasias. therefore a colonoscopy was performed and two polyps were removed. histological analysis revealed a tubulovillous adenoma and a serrated adenoma. colonoscopy is mandatory for all patients with streptococcus bovi ...200415185488
vasculitic purpura with antineutrophil cytoplasmic antibody-positive acute renal failure in a patient with streptococcus bovis case and neisseria subflava bacteremia and subacute endocarditis.subacute bacterial endocarditis is frequently associated with extracardiac manifestations and renal failure. clinical variety of endocarditis manifestation is wide and has the potential to mimic vasculitis. whereas streptococcus bovis is often isolated and associated with colonic tumors, neisseriaceae are rarely found. an association of subacute bacterial endocarditis and antineutrophil cytoplasmic antibodies has been described. we report on a 62-year-old man who was admitted to our hospital wit ...200415356972
streptococcus bovis endocarditis and its association with chronic liver disease: an underestimated risk factor.clinical and epidemiological characteristics of streptococcus bovis endocarditis were prospectively studied among 199 patients with definite endocarditis. thirty patients (15.1%) had s. bovis endocarditis. compared with patients with non-s. bovis endocarditis, these 30 patients were older (mean age, 58.6+/-12.4 years vs. 46.0+/-17.0 years; p<.001) and had higher rates of bivalvular involvement (43.3% vs. 7.7%; p<.001), embolism (73.3% vs. 40.2%; p=.002), and diskitis (23.3% vs. 0.6% p<.001). in ...200415156477
association of streptococcus bovis bacteremia with colonic neoplasia and extracolonic malignancy.the association between streptococcus bovis bacteremia and colonic neoplasia is well described; however, the relationship between s bovis and neoplasia outside the colon has not been well evaluated.200415249410
molecular characteristics and transcription of the gene encoding a multifunctional alcohol dehydrogenase in relation to the deactivation of pyruvate formate-lyase in the ruminal bacterium streptococcus bovis.to clarify the deactivation mechanism of pyruvate formate-lyase (pfl) and its role in the regulation of fermentation in streptococcus bovis, the molecular properties and genetic expression of multifunctional alcohol dehydrogenase (adhe) were investigated. s. bovis was found to have adhe, which was deduced to consist of 872 amino acids with a molecular mass of 97.4 kda. the adhe was shown to harbor three enzyme activities: (1) alcohol dehydrogenase, (2) coenzyme-a-linked acetaldehyde dehydrogenas ...200414676990
bovicin hj50, a novel lantibiotic produced by streptococcus bovis hj50.a bacteriocin-producing strain was isolated from raw milk and named streptococcus bovis hj50. like most bacteriocins produced by lactic acid bacteria, bovicin hj50 showed a narrow range of inhibiting activity. it was sensitive to trypsin, subtilisin and proteinase k. bovicin hj50 was extracted by n-propanol and purified by sp sepharose fast flow, followed by phenyl superose and sephadex g-50. treatment of micrococcus flavus ncib8166 with bovicin hj50 revealed potassium efflux from inside the cel ...200414702402
carcinogenic properties of proteins with pro-inflammatory activity from streptococcus infantarius (formerly s.bovis).several studies reported linkage between bacterial infections and carcinogenesis. streptococcus bovis was traditionally considered as a lower grade pathogen frequently involved in bacteremia and endocarditis. this bacterium became important in human health as it was shown that 25-80% of patients who presented a s.bovis bacteremia had also a colorectal tumor. moreover, in previous experiments, we demonstrated that s.bovis or s.bovis wall extracted antigens (wea) were able to promote carcinogenesi ...200414742316
bacteremic streptococcus bovis infections at a university hospital, 1992-2001.the association of streptococcus bovis biotypes with types of clinical infection and underlying malignancies has rarely been reported in taiwan. the aim of this study was to characterize the clinical features and microbiological characteristics of patients with s. bovis bacteremia.200415083242
antimicrobial susceptibility patterns and macrolide resistance genes of viridans group streptococci from blood cultures in korea.our aim was to study the antimicrobial susceptibilities and macrolide resistance mechanisms of viridans group streptococci (vgs) in a korean tertiary hospital.200415117924
antimicrobial spectrum and activity of nvp pdf-713, a novel peptide deformylase inhibitor, tested against 1,837 recent gram-positive clinical isolates.continued emergence of antimicrobial resistances among gram-positive pathogens requires further development of compounds with novel modes of action. the peptide deformylase inhibitor nvp pdf-713 was tested against 1,837 recent strains of gram-positive organisms. all nvp pdf-713 mics were at < or = 4microg/ml except for 6 enterococci (0.3% of strains overall). nvp pdf-713 mic(90) results were: staphylococcus aureus, beta-haemolytic and viridans group streptococci and streptococcus bovis at 1 micr ...200415135503
resistance of rumen bacteria murein to bovine gastric lysozyme.lysozymes, enzymes mostly associated with defence against bacterial infections, are mureinolytic. ruminants have evolved a gastric c type lysozyme as a digestive enzyme, and profit from digestion of foregut bacteria, after most dietary components, including protein, have been fermented in the rumen. in this work we characterized the biological activities of bovine gastric secretions against membranes, purified murein and bacteria.200415137912
effects of the overexpression of fructose-1,6-bisphosphate aldolase on fermentation pattern and transcription of the genes encoding lactate dehydrogenase and pyruvate formate-lyase in a ruminal bacterium, streptococcus bovis.whether fructose-1,6-bisphosphate (fbp) triggers the transcriptional regulation of the gene expression of lactate dehydrogenase (ldh) and pyruvate formate-lyase (pfl) in streptococcus bovis was examined by constructing a recombinant strain that overexpresses fbp aldolase (fba). when the recombinant strain was grown on glucose, intracellular fbp was much lower as compared to the parent strain, whereas dihydroxyacetone phosphate (dhap) and d-glyceraldehyde-3-phosphate (gap) were slightly higher. i ...200415248145
direct production of ethanol from raw corn starch via fermentation by use of a novel surface-engineered yeast strain codisplaying glucoamylase and alpha-amylase.direct and efficient production of ethanol by fermentation from raw corn starch was achieved by using the yeast saccharomyces cerevisiae codisplaying rhizopus oryzae glucoamylase and streptococcus bovis alpha-amylase by using the c-terminal-half region of alpha-agglutinin and the flocculation functional domain of flo1p as the respective anchor proteins. in 72-h fermentation, this strain produced 61.8 g of ethanol/liter, with 86.5% of theoretical yield from raw corn starch.200415294847
molecular characteristics of phosphoenolpyruvate: mannose phosphotransferase system in streptococcus bovis.to elucidate the regulatory mechanism of catabolite control in streptococcus bovis, we investigated the molecular properties and gene expression of the mannose-specific phosphoenolpyruvate (pep)-dependent sugar: phosphotransferase system (pts). the mannose pts gene cluster (man) was found to comprise a gene encoding enzyme (e) ii ab (manl) and genes encoding eiic (manm), eiid (mann), and a putative regulator (mano). the gene cluster (man operon) was transcribed from one transcriptional start sit ...200415297922
successful treatment of four-valve native endocarditis caused by streptococcus bovis. 200415336831
use of community genome arrays (cgas) to assess the effects of acacia angustissima on rumen ecology.this research developed a community genome array (cga) to assess the effects of acacia angustissima on rumen microbiology. a. angustissima produces non-protein amino acids as well as tannins, which may be toxic to animals, and cga was used to assess the effects of this plant on the ecology of the rumen. cgas were developed using a 7.5 cmx2.5 cm nylon membrane format that included up to 96 bacterial genomes. it was possible to separately hybridize large numbers of membranes at once using this min ...200415347749
characterization of streptococcus bovis from the rumen of the dromedary camel and rusa deer.isolation and characterization of streptococcus bovis from the dromedary camel and rusa deer.200415355536
protozoa involved in butyric rather than lactic fermentative pattern during latent acidosis in sheep.we used six ruminally cannulated texel wethers to study the relative role of protozoa and lactate-metabolizing bacteria in ruminal fermentative patterns during an induced latent acidosis. the sheep were fed an alfalfa hay diet (h) and latent acidosis was induced, following a short transition period of one week, with a grain-rich acidotic diet (w, 60% wheat + 40% alfalfa hay). ruminal ph, ruminal volatile fatty acids (vfa), lactate and nh3 concentrations, protozoa and lactate-utilizing bacterial ...200415460159
streptococcus bovis septic shock due to contaminated transfused platelets.although most physicians and the public are primarily concerned about the risk of transmitting human immunodeficiency virus (hiv) or hepatitis virus during a platelet transfusion, bacterial contamination is actually the most common infectious complication. unlike red blood cells, platelets are stored at room temperature (20-24 degrees c), which raises the risk of bacterial proliferation. the risk of bacterial sepsis is 2.5-fold higher for each unit of transfused platelets compared to each unit o ...200415495249
the influence of endoscopic procedures upon the contamination of helicobacter pylori cultures.among the various diagnostic methods for the detection of helicobacter pylori infection, histological examination and microbiological processing of gastric biopsy samples are assumed to be the gold standard techniques.200415543382
chronic liver disease and streptococcus bovis endocarditis. 200415546102
the effect of ph and a bacteriocin (bovicin hc5) on clostridium sporogenes md1, a bacterium that has the ability to degrade amino acids in ensiled plant materials.fresh plant materials can be fermented and preserved as silage for cattle, but clostridia that deaminate amino acids increase ph. if the ph of the silage rises, spoilage microorganisms proliferate, and undesirable products accumulate. rod-shaped, anaerobic bacteria with spores were isolated from fresh alfalfa, fresh corn, and silages. strain md1 had the highest specific activity of amino acid deamination, and it was most closely related to clostridium botulinum a and b. however, because strain m ...200419712336
the use of pcr for the identification and characterisation of bacteriocin genes from bacterial strains isolated from rumen or caecal contents of cattle and sheep.pcr primers were designed to amplify the gene that encodes bovicin 255 from streptococcus gallolyticus lrc0255 and the bacteriocin genes from butyrivibrio fibrisolvens strains ar10 and or79a (bvid and bvi79a) in order to screen for their incidence in rumen and caecal b. fibrisolvens and streptococcus bovis-like isolates from new zealand and north american ruminants. none of the b. fibrisolvens-like strains (n=34) isolated from new zealand or north america had the genes encoding for butyrivibrioc ...200419712403
a retained intravascular medical device and streptococcus bovis infection, providing early diagnosis of an occult malignancy. 200515667921
in vitro activity of telithromycin against viridans group streptococci and streptococcus bovis isolated from blood: antimicrobial susceptibility patterns in different groups of species.the in vitro activities of penicillin, erythromycin, clindamycin, and telithromycin were determined against 155 viridans group streptococci (vgs) and 18 streptococcus bovis blood isolates. heterogeneity in the susceptibility patterns and macrolide resistance phenotypes and genotypes in the different groups of vgs was detected. we found seven telithromycin-resistant s. bovis isolates all harboring the erm(b) gene.200515673778
genetic basis of antibiotic resistance in clinical isolates of streptococcus gallolyticus (streptococcus bovis).among 128 streptococcus gallolyticus (streptococcus bovis) isolates, 77.7% were resistant to tetracyclines and contained tet(m) and/or tet(l) and/or tet(o). a total of 59.4% had macrolide resistance and contained erm(b) and, rarely, mef(a). among the one-third of isolates highly resistant to kanamycin and streptomycin, most harbored apha3 and aad-6 genes.200515793162
bacteremia due to streptococcus gallolyticus, or the perils of revised nomenclature in bacteriology. 200515825011
a blood donor with bacteraemia. 200515866315
clinical characteristics and significance of streptococcus salivarius bacteremia and streptococcus bovis bacteremia: a prospective 16-year study.the aim of this study was to determine the clinical significance of streptococcus salivarius isolates recovered from blood cultures and compare them with isolates of streptococcus bovis biotypes i and ii. seventeen of the 52 (32%) s. salivarius isolates recovered were considered clinically significant, compared with 62 of the 64 (97%) s. bovis isolates (p<0.0001). bacteremia caused by s. salivarius occurred mostly in patients who showed relevant disruption of the mucous membranes and/or serious ...200515902530
recurrent klebsiella pneumoniae liver abscess in a diabetic patient followed by streptococcus bovis endocarditis--occult colon tumor plays an important role.klebsiella pneumoniae is the leading cause of liver abscess in diabetic patients in taiwan. we report the case of a diabetic patient with a history of four episodes of k. pneumoniae liver abscess within 3 years. the patient later developed streptococcus bovis bacteremia originating from a colon tumor with complications of endocarditis, osteomyelitis, and silent splenic abscess. occult colon tumor may have played an important role in our case, with recurrent infection arising from colonizers of t ...200515858282
mitral valve endocarditis after dental prophylaxis in a dog. 200515822575
[bacterially conditioned thromboembolism in dairy cows--a retrospective study of 31 necropsy cases with special consideration of the causative complex].a study of 340 necropsied dairy cattle from northern bavaria resulted in 31 animals (9%) showing evidence of pyemic thromboembolism. the most frequent pathomorphologic lesions consisted in endocarditis valvularis thromboticans of the tricuspid and/or mitral valve (21), embolic pneumonia (26), nephritis (13) and renal infarction (12). the most common isolate found in bacteriologic culture was arcanobacterium pyogenes in 26 of 31 cases, followed by staphylococcus aureus (2), mannheimia haemolytica ...200515803759
risk of embolism and death in infective endocarditis: prognostic value of echocardiography: a prospective multicenter study.the incidence of embolic events (ee) and death is still high in patients with infective endocarditis (ie), and data about predictors of these 2 major complications are conflicting. moreover, the exact role of echocardiography in risk stratification is not well defined.200515983252
daptomycin tested against 915 bloodstream isolates of viridans group streptococci (eight species) and streptococcus bovis.to evaluate the activity of daptomycin tested against numerous species of viridans group streptococci and streptococcus bovis, which are associated with wound infections, sepsis, cellulitis, endocarditis, abscesses and dental caries. the incidence of penicillin-resistant (non-susceptible) and mls(b)-resistant strains among viridans group streptococci often varies by species.200515722390
gross abnormalities, bacteriology and histological lesions of uteri of dairy cows failing to conceive or maintain pregnancy.to describe the gross pathology, bacteriology and histopathology of the reproductive tracts of dairy cows that failed to conceive or maintain pregnancy.200516044186
effect of the microbial feed additive saccharomyces cerevisiae cncm i-1077 on protein and peptide degrading activities of rumen bacteria grown in vitro.we investigated the potential of the ruminant feed additive saccharomyces cerevisiae cncm i-1077 on protein and peptide degrading activities of the rumen bacterial species prevotella albensis m384, streptococcus bovis 20480, and butyrivibrio fibrisolvens 3071 grown in vitro. alive or heat-killed yeast cells were added to bacterial cultures in a complex casein-glucose medium. after incubation of the cultures at 39 degrees c under o(2)-free co(2), peptidase activities were determined in the absenc ...200515702254
viridans group streptococci: an underestimated cause of spontaneous bacterial peritonitis in cirrhotic patients with ascites.the objective of the study was to examine the characteristics of spontaneous bacterial peritonitis (sbp) caused by streptococci, in particular viridans group streptococci (vgs), and to investigate a potential association between the long-term administration of norfloxacin and high-level resistance to fluoroquinolones in these organisms.200516093870
emergence of endocarditis due to group d streptococci: findings derived from the merged database of the international collaboration on endocarditis.the aim of the present study was to compare the epidemiological and clinical characteristics of streptococcus bovis endocarditis with those of endocarditis caused by oral streptococci, using data obtained from a large international database of uniformly defined cases of infective endocarditis. s. bovis, a well-known cause of infective endocarditis, remains the common name used to designate group d nonenterococcal streptococci. in some countries, the frequency of s. bovis endocarditis has increas ...200515660254
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