infant with streptococcus bovis meningitis. 19816943355
comparison of selective media for the enumeration and identification of fecal streptococci from natural sources.five media and procedures were compared for their recovery of fecal streptococci on membrane filters. growth and numbers of a variety of pure cultures were compared, and recoveries from raw sewage and sewage effluent were determined on the five media. a total of 512 isolates were identified and the specificity of each medium was determined from these results. while ke agar recovered significantly higher numbers of organisms, only 81% of the positive colonies were fecal streptococci. slanetz and ...19807011510
a selective medium for the enumeration of streptococcus bovis by membrane filtration. 19817024238
direct testing of blood cultures for detection of streptococcal antigens.a direct, rapid, and simple method for the detection of streptococcal antigens of lancefield groups a, b, c, d, and g from blood cultures was developed by using a coagglutination test. fifty-five clinical specimens and 117 simulated blood cultures containing gram-positive cocci were tested. out of 6,261 clinical blood cultures screened, 55 cultures from 53 patients were positive, with organisms resembling streptococci, by gram stain. of these cultures, 78% (43 of 55) were pure cultures of strept ...19827050168
the association of remote streptococcus bovis bacteremia with colonic neoplasia.we prospectively studied five patients with a remote history of streptococcus bovis bacteremia who had not previously been evaluated for colonic pathology. this study was prompted by several reports of concomitant neoplasia in patients with recent s. bovis bacteremia. the patients were studied at a mean of 32 months after bacteremia. despite the absence of other signs or symptoms suggestive of bowel disease, a negative test for occult blood in stool and a negative fecal culture for s. bovis, tw ...19827072685
infective endocarditis in a community hospital.recent reviews from major university centers of infective endocarditis have stressed an increase in unusual infections owing to virulent pathogens. this article compares the 40 episodes of infective endocarditis at a community hospital complex with the recent literature. it was observed that the majority of infecting microorganisms were penicillin-susceptible streptococci similar to those seen in the early antibiotic era. an older patient population was encountered, but overall mortality was low ...19827073419
meningitis caused by streptococcus bovis.streptococcus bovis was isolated from the csf of a 66-year-old man with meningitis. his clinical appearance was unusual in that he lacked typical signs and symptoms of pyogenic meningitis. streptococcus bovis was also recovered from his blood, which suggested that bacterial endocarditis was the source of his cns infection. he was cured after four weeks of therapy with intravenous penicillin g potassium. this is the fourth reported case of meningitis caused by s bovis. the previous three patients ...19827073553
high-level aminoglycoside resistance in group a, b, g, d (streptococcus bovis), and viridans streptococci.of 20 clinical isolates of group a, b, g, d (streptococcus bovis), and viridans streptococci, 5 transferred their antibiotic resistance markers into streptococcal recipients at a low frequency (10(-4) to 10(-8)) in the apparent absence of extrachromosomal elements. all strains carried genetic markers for high-level resistance to streptomycin, kanamycin, neomycin, lividomycin a, and ribostamycin, as well as resistance to macrolides and related drugs, tetracycline, and chloramphenicol.19827081973
effect of lasalocid, monensin or thiopeptin on lactic acidosis in cattle.lasalocid, monensin or thiopeptin was administered intraruminally each at .33, .65 or 1.3 mg/kg body weight and evaluated for its effectiveness in preventing experimentally induced lactic acidosis in cattle. four rumen-fistulated cattle were used for each dosage level and the design was a 4 x 4 latin square with each animal receiving lasalocid, monensin, thiopeptin or no antibiotic. acidosis was induced by intraruminal administration of glucose (12.5 g/kg body weight). control cattle exhibited t ...19827085521
value of the minimum bactericidal concentration of antibiotics in the management of a case of recurrent streptococcus bovis septicaemia.after prostatectomy a 60-year-old man developed streptococcus bovis septicaemia. the patient did not respond to treatment with a combination of ampicillin and erythromycin and in vitro antagonism between these antibiotics was demonstrated by minimum bactericidal concentration (mbc). the value of determining the mbc of antibiotics used in the treatment of septicaemia is emphasised.19827107961
effect of ph on growth rates of rumen amylolytic and lactilytic bacteria.the relationship between the ph of the medium and specific growth rates, in well-buffered media at 38.5 degrees c, was determined for three strains of butyrivibrio fibrisolvens and for one strain each of streptococcus bovis, selenomonas ruminantium subsp. lactilytica. megasphaera elsdenii, veillonella alcalescens, and propionibacterium acnes. the ph optima for growth were between 6.1 and 6.6 for all six species, and the upper ph limits were between 7.3 and 7.8. the lower limit ph values for grow ...19827125656
effect of carbohydrates on the antibacterial activity of patulin on streptococcus bovis.the antibiotic activity of patulin on streptococcus bovis varied in the presence of different sugars in the incubation medium. the 50% inhibitory concentration (ic50) of patulin was 4.5 times greater in the medium containing glucose than in the lactose-containing medium (100.5 versus 22 micrograms/ml). the addition of two sugars (glucose plus lactose) to the medium was followed by the utilization of glucose only when patulin was present; lack of growth on lactose was not due to beta-galactosidas ...19827172139
conversion of amoscanate to a mutagenic metabolite in gnotobiotic mice implanted with streptococcus equinus.recent in vitro studies indicate that intestinal bacteria convert amoscanate (4-nitro-4'-isothiocyanodiphenylamine), an antischistosomal drug, to a potent mutagen. the present study indicates that the implantation of germfree mice with streptococcus equinus, isolated from the small intestine of conventional mice, restores the mutagenic activation of amoscanate in vivo.19827181482
neonatal streptococcus bovis (non-enterococcal group d streptococcus) septicemia and meningitis. report of a case. 19827187211
isolation and presumptive identification of adherent epithelial bacteria ("epimural" bacteria) from the ovine rumen hundred sixty-one strains of adherent bacteria were isolated under anaerobic conditions from four sites on the rumen epithelial surface of sheep fed hay or a hay-grain ration. before isolation of bacteria, rumen tissue was washed six times in an anaerobic dilution solution, and viable bacteria suspended in the washings were counted. calculation indicated that unattached bacteria would have been removed from the tissue by this procedure, but a slow and progressive release of attached bacteria ...19817195191
streptococcus bovis and colonic neoplasia. 19827201599
streptococcus bovis endocarditis and colon carcinoma. 19817238020
streptococcus bovis endocarditis and squamous-cell carcinoma of the mouth. 19817242623
polyposis coli presenting with streptococcus bovis endocarditis.streptococcus bovis bacteremia is an important early clue to the presence of serious and clinically unexpected gastrointestinal disease, particularly carcinoma of the colon. s. bovis bacteremia has also been associated with carcinoma of the esophagus and stomach, gastric lymphoma, pancreatic adenocarcinoma, intestinal diverticulosis and single adenomatous polyps and villous polyps of the colon. we report a patient with s. bovis endocarditis as the initial clinical manifestation of extensive poly ...19817258178
streptococcus bovis bacteremia: diagnosis of neoplasms by colonoscopy. 19817268506
effects of lasalocid or monensin on lactate-producing or -using rumen bacteria.lasalocid or monensin inhibited most of the lactate-producing rumen bacteria (butyrivibrio fibrisolvens, eubacterium cellulosolvens, e. ruminantium, lachnospira multiparus, lactobacillus ruminis, l. vitulinus, ruminococcus albus, r. flavefaciens, streptococcus bovis). minimum inhibitory concentrations ranged from .38 to 3.0 micrograms/ml. among the lactate producers, those that produce succinate as a major end product (bacteroides, selenomonas, succinimonas, succinivibrio) were not inhibited by ...19817275867
streptococcus bovis endocarditis presenting as acute vertebral osteomyelitis. 19817306247
degradation of protein by mixed cultures of rumen bacteria: identification of streptococcus bovis as an actively proteolytic rumen bacterium.mixed cultures of rumen bacteria were inoculated into anaerobic buffer solutions containing mixed carbohydrates, casein and ammonia, and rates of bacterial growth, protein degradation, ammonia formation or utilization and lactate production were determined. bacterial growth rate was varied by the provision of excess carbohydrate (one large dose at the onset of the incubation) or limited carbohydrate (small doses every hour or every 2 hr). when carbohydrate was limited, growth rate was slow, the ...19817319939
streptococcus bovis bacteremia following surgical cure of colonic cancer.a patient with adenocarcinoma of the colon developed s. bovis endocarditis 21 months after presumed surgical cure of his cancer. the sequence in all previously published cases is that of bacteremia first, followed by a diagnosis of colon cancer. is there a predetermined genetic or immunologic factor predisposing to s. bovis bacteremia even after the integrity of the mucosal barrier has been restored post-resection?19817331988
vancomycin therapy for infective endocarditis.the use of vancomycin is increasing for the treatment of serious life-threatening staphylococcal and other bacterial infections, including infective endocarditis, in patients who are allergic to the penicillins. the literature through 1978 reveals approximately 55 cases of infective endocarditis treated with vancomycin alone or with combined antibiotic therapy. many of these 55 patients were treated by different clinicians, were given variable regimens of therapy, received other therapy before v ...19817342289
streptococcus bovis septicemia and pancreatic adenocarcinoma. 19807356254
control of wheat-induced lactic acidosis in sheep by thiopeptin and related antibiotics.thiopeptin, thiopeptin-like antibiotics and penicillin were shown previously to be highly active in vitro against streptococcus bovis, the microorganism believed to be responsible for the initiation of ruminal lactic acidosis. the purpose of this work was to determine the efficacy of these antibiotics in preventing lactic acidosis in lambs challenged by intraruminal administration of ground wheat. lambs, which were fasted and then given ground wheat at 40 g/kg body weight, showed dramatic increa ...19807364689
streptococcus equinus septicemia: report of two cases and review of the literature.two cases of septicemia with streptococcus equinus, a group d streptococcus, are reported, and the literature pertaining to infections with this organism is reviewed. both of our patients presented with obvious signs of infection, had s equinus isolated from multiple blood cultures, and had a good clinical response to penicillin therapy, alone or in combination with streptomycin. in vitro testing of the isolates confirmed susceptibility to penicillin. s equinus should now be recognized as a huma ...19807386522
effect of ph on the efficiency of growth by pure cultures of rumen bacteria in continuous culture.a total of 10 strains of rumen bacteria, selenomonas ruminantium hd4, megasphaera elsdenii b159, butyrivibrio fibrisolvens a38, streptococcus bovis jb1, lactobacillus vitulinus ga1, bacteroides ruminicola b14, b. ruminicola ga33, ruminococcus albus 7, ruminococcus flavefaciens c94, and bacteroides succinogenes s85, were grown in energy-limiteh of the medium reservoir was lowered approximately 0.3 ph units, and the energy source concentration remaining in the culture vessel, optical density, cell ...19807387158
short-term therapy for streptococcal infective endocarditis. combined intramuscular administration of penicillin and a prospective study, 91 patients with penicillin-sensitive infective endocarditis (ie) were treated for two weeks with intramuscular (im) penicillin g procaine, 1.2 million units every six hours, plus streptomycin sulfate, 500 mg im every 12 hours. viridans streptococci were isolated from 70 patients (77%); 21 patients (23%) had streptococcus bovis infections. eighteen patients (20%) had had symptoms of ie for three months or longer. follow-up ranged from two months to 6.6 years. there were n ...19817452862
infective endocarditis, 1970-1979. a study of culture-positive cases in st. thomas' hospital.ninety-three episodes of culture-positive endocarditis occurred in 88 patients in the years 1970 to 1979. streptococci caused two-thirds of the cases, with streptococcus mitior and streptococcus sanguis most common. among the group d streptococci, streptococcus bovis was much more common than streptococcus faecalis. staphylococci accounted for a quarter of the episodes. streptococcal endocarditis was commonest in the elderly, whereas staphylococcal endocarditis occurred at all ages. degenerative ...19807465764
antibiotic treatment of adults with infective endocarditis due to streptococci, enterococci, staphylococci, and hacek microorganisms. american heart provide guidelines for the treatment of endocarditis in adults caused by the following microorganisms: viridans streptococci and other streptococci, enterococci, staphylococci, and fastidious gram-negative bacilli of the hacek group.19957474277
regulation of the lactose phosphotransferase system of streptococcus bovis by glucose: independence of inducer exclusion and expulsion mechanisms.streptococcus bovis had a diauxic pattern of glucose and lactose utilization, and both of these sugars were transported by the sugar phosphotransferase system (pts). lactose catabolism was inducible, and s. bovis used the tagatose pathway to ferment lactose. since a mutant that was deficient in glucose pts activity transported lactose as fast as the wild-type, it appeared that s. bovis has separate enzyme iis for glucose and lactose. the nonmetabolizable glucose analogue 2-deoxyglucose (2-dg) wa ...19957496538
identification of intracellular amylase activity in streptococcus bovis and streptococcus salivarius.the ruminal bacterium streptococcus bovis has been demonstrated to produce an extracellular amylase activity. we previously reported on the cloning of a gene from s. bovis encoding for what was initially believed to be the extracellular amylase. dna sequence analyses indicated that the amylase produced by the cloned gene did not match the n-terminus amino acid sequence of the purified extracellular amylase and contained no apparent leader sequence for secretion. analyses of crude extracts demons ...19957532504
intracellular survival and multiplication of virulent and less virulent strains of streptococcus bovis in pigeon macrophages.the intracellular fate of pigeon s. bovis strains ingested by macrophages was studied in vivo and in vitro. during in vivo experiments, histological and electron microscopical examinations demonstrated numerous cocci, which appeared to be actively multiplying, within splenic macrophages of pigeons experimentally inoculated with a highly virulent s. bovis serotype 1 strain. in pigeons inoculated with a low virulence serotype 3 strain, intracellular cocci were only occasionally observed. for in vi ...19957571367
a gene-targeting suicide vector for streptococcus bovis.a gene-targeting suicide vector for streptococcus bovis has been constructed using the escherichia coli/streptococcus shuttle plasmid, pmu1328, and a region derived from the broad host-range, gram-positive transposon, tn916. this suicide plasmid replicates autonomously in e. coli, but not in strep. bovis or strep. bovis tn916. under positive selection, the plasmid was shown to integrate into strep. bovis tn916 chromosomal dna at a frequency of 3 x 10(-8) cell-1 and was stably maintained for at l ...19957576523
differentiation of ruminal and human streptococcus bovis strains by dna homology and 16s rrna probes.streptococcus bovis is commonly present in the rumen, but strains of s. bovis have also occasionally been isolated from human blood or fecal samples. studies were undertaken with 16s rrna gene sequences and dna hybridizations to define the genetic relationships between these two groups of strains. ruminal strains were found to yield genomic dna restriction endonuclease digest patterns different from human strains when either the 16s rrna gene amplified from ruminal s. bovis strain jb1 or a conse ...19957580800
properties of two sugar phosphate phosphatases from streptococcus bovis and their potential involvement in inducer expulsion.streptococcus bovis possesses two sugar phosphate phosphatases (pases). pase i is a soluble enzyme that is inhibited by the membrane fractions from lactose-grown cells and is insensitive to activation by s46d hpr, an analog of hpr(ser-p) of the sugar phosphotransferase system. pase ii is a membrane-associated enzyme that can be activated 10-fold by s46d hpr, and it appears to play a role in inducer expulsion.19957592500
[spondylodiscitis in subacute bacterial endocarditis. apropos of a case].occurring of spondylodiscitis as first manifestation of bacterial endocarditis in an uncommon condition. about fifty cases are reported in the literature. such association makes imperious the regular examination of the heart of patients with spondylodiscitis and spine radiography when a vertebral pain is found to be present in patients with bacterial endocarditis. an additional case is her by reported.19947596460
effect of extracellular lactate on growth of rumen lactate producers.the addition of na-lactate (50-150 mmol/l) to media with glucose had only marginal effect on the growth of rumen lactate-producing bacteria at ph between 6.5 and 5.8. butyrivibrio fibrisolvens was somewhat more sensitive to external lactate than streptococcus bovis, lactobacillus fermentum and selenomonas ruminantium. it can be concluded that rumen lactate producers, which proliferate at the onset of rumen lactic acidosis, are not influenced by the lactate accumulation, except some non-specific ...19947619002
cellodextrin efflux by the cellulolytic ruminal bacterium fibrobacter succinogenes and its potential role in the growth of nonadherent bacteria.when glucose or cellobiose was provided as an energy source for fibrobacter succinogenes, there was a transient accumulation (as much as 0.4 mm hexose equivalent) of cellobiose or cellotriose, respectively, in the growth medium. nongrowing cell suspensions converted cellobiose to cellotriose and longer-chain cellodextrins, and in this case the total cellodextrin concentration was as much as 20 mm (hexose equivalent). because cell extracts of glucose- or cellobiose-grown cells cleaved cellobioise ...19957646013
carcinoma of the colon presenting as streptococcus sanguis bacteremia.bacteremia by streptococci that normally inhabit the gastrointestinal tract has been associated with colon carcinoma. such association is best known for streptococcus bovis, but has also been reported for other streptococci. in the present communication a patient is described who presented with streptococcus sanguis bacteremia and was subsequently found to suffer from an adenocarcinoma of the sigmoid. a possible association between bacteremia by commensal streptococci of both the upper and lower ...19957661185
identification of proteolytic rumen bacteria isolated from new zealand cattle.the protease activities of 212 strains of rumen bacteria isolated from new zealand cattle grazing pasture were measured. thirty-seven per cent of strains had activity greater than or equal to the proteolytic rumen bacterium prevotella ruminicola and 43 of these isolates were identified by morphology, carbon source utilization, gram stain, biochemical tests and fermentation end-product analysis. hierarchical cluster analysis showed that the strains formed four clusters: cluster a contained 26 str ...19957665388
regulation and cloning of the gene encoding amylase activity of the ruminal bacterium streptococcus bovis.streptococcus bovis is an important starch-degrading ruminal bacterium that has been implicated as being important in the etiology of a number of ruminal pathologies associated with diets high in grains. previous studies with s. bovis have shown that amylase production was influenced by the growth substrate, but the nature of this regulation was not determined. the current study was conducted to better describe the regulatory phenomena and gain a better understanding of the molecular characteris ...19937679887
development of a dna probe for streptococcus bovis by using a cloned amylase gene.streptococcus bovis is a normal inhabitant of the rumen but has been implicated as a causative agent for ruminal lactic acidosis and related problems. while rarely isolated from humans, s. bovis has been identified as a causative agent for endocarditis, meningitis, and septicemia. recent reports have also suggested a correlation between human colonic carcinoma and increased levels of s. bovis. identification of s. bovis strains of human origin has been problematic because of variations in result ...19937691873
the in vitro uptake and metabolism of peptides and amino acids by five species of rumen bacteria.streptococcus bovis jb1, prevotella ruminicola b(1)4, selenomonas ruminantium z108, fibrobacter succinogenes s85 and anaerovibrio lipolytica 5s were incubated with either 14c-peptides (mol. wt, 200-1000) or 14c-amino acids to compare their rates of uptake and metabolism. in experiment 1, the bacteria were grown and incubated in a complex medium, but no uptake of 14c-labelled substrates occurred. when casein digest was omitted, uptake rates of 14c-peptides were different (p < 0.01) with each spec ...19957698948
heterologous expression of an endoglucanase gene (enda) from the ruminal anaerobe ruminococcus flavefaciens 17 in streptococcus bovis and streptococcus sanguis.the heterologous expression of a cloned endoglucanase gene (enda) from the ruminal bacterium ruminococcus flavefaciens 17 was demonstrated in the streptococcus species s. bovis jb1 and s. sanguis dl1. the enda gene was introduced into s. bovis and s. sanguis using the escherichia coli/streptococcus shuttle vector pva838. expression of the gene was detected by clearing zones around the recombinant colonies on agar plates containing carboxymethylcellulose stained with congo red. s. bovis jb1 conta ...19957705607
[the isolation of streptococcus morbillorum from vaginal exudates].we have tested 195 vaginal secretions sent by gynecology service of this hospital between the years 1988-1990. we achieved positive culture for streptococci in 58 (30%) of these cultures, 26 (44.8%) corresponding to streptococcus morbillorum 9 (15.5%), to gardnerella vaginalis 5 (8.6%), to enterococcus faecalis-durans and to streptococcus agalactiae, 3 (5.1%) to streptococcus mitis and milleri 2 (3.4%), to streptococcus bovis and cremoris, and 1 (1.7%) to streptococcus salivarius, equinus and sa ...19957716323
nutrient transport by ruminal bacteria: a review.fermentation pathways have been elucidated for predominant ruminal bacteria, but information is limited concerning the specific transport mechanisms used by these microorganisms for c, energy, and n sources. in addition, it is possible that changes in ruminal environmental conditions could affect transport activity. five carrier-mediated soluble nutrient transport mechanisms have been identified in bacteria: 1) facilitated diffusion, 2) shock sensitive systems, 3) proton symport, 4) na+ symport, ...19947730197
[mycotic aneurysm of the posterior tibial artery and pseudo-phlebitis: contribution of color doppler ultrasonography].mycotic aneurysm of the posterior tibial artery and pseudophlebitis: role of color doppler sonography a case of a 78-year-old male patient presenting with endocarditis caused by streptococcus bovis and pseudophlebitis of the left lower limb is described. color doppler sonography ruled out thrombophlebitis and showed a large pulsatile mass of the posterior compartment of the leg due to a mycotic aneurysm of the posterior tibial artery. this aneurysm was confirmed by angiography and treated by sur ...19957745555
streptococci and enterococci associated with tonsils of cattle.streptococcus suis, streptococcus bovis and the mastitis pathogens streptococcus dysgalactiae and streptococcus uberis were the most frequently occurring streptococci in tonsils of cattle. streptococcus suis dominated in samples from calves between 1 month and 1 year of age, but was much less frequent in calves less than 1 month old. the mastitis pathogen strep. dysgalactiae was found more often in calves than in older animals. enterococci were relatively rare, except in the youngest age group. ...19937763446
sbvi restriction endonuclease from streptococcus bovis.restriction endonuclease sbvi, an isoschizomer of haeiii, has been isolated from rumen amylolytic bacterium streptococcus bovis ii/1. sbvi was purified from cell extract by phosphocellulose chromatography and heparin-sepharose chromatography. the recognition sequence of sbvi was identified by digestion of pbr322, puc9 and lambda-dna and comparing the cleavage patterns obtained with computer-derived data. sbvi recognizes the 4-bp palindrome, 5'-ggcc-3' and cleaves dna after the second g in the se ...19937764381
the adherence of three streptococcus bovis strains to cells of rumen epithelium primoculture under various conditions.three streptococcus bovis strains were tested in biotype assay and examined for the adherence to cells of rumen epithelium primoculture. the adherence pattern of ruminal streptococci in phosphate buffered saline at ph values ranging from 4.1 to 8.5 was determined. our isolates of streptococcus bovis strains adhered best at ph 7.0-7.3. to characterize the adhesive determinants, the bacterial cells were exposed to various treatments. protease treatment dramatically decreased the adherence of all s ...19947778984
streptococcus bovis infections in pigeons: virulence of different a first experiment, the relative virulence for pigeons of 5 strains of s. bovis was assessed by experimental inoculations. two s. bovis serotype 1 strains, one serotype 2 strain and two serotype 3 strains were examined. one of the serotype 1 strains and the serotype 2 strain were isolated from pigeons that died from septicaemia. the other strains were isolated from cloaca samples of healthy pigeons. for each strain, 10-20 pigeons were intravenously inoculated with 1 x 10(9) cfu. morbidity aft ...19947801532
positive inotropic effect of streptococcus faecalis in isolated cardiac muscle.infective endocarditis is caused by bacterial colonization of the endocardium. because endocardium modulates mechanical performance of subjacent myocardium, we studied acute effects of bacteria on isolated cardiac muscle and on the functional role of the endocardium. bacteria, grown in broth at 37 degrees c, were added at increasing concentrations (10(2) to 10(6) bacteria/ml) to cat papillary muscles in krebs-ringer solution (1.25 mm ca2+, 35 degrees c). the endocardial surface was damaged by ex ...19947810743
[regulation of microbiologic processes in the rumen of ruminants by bacteriophages of streptococcus bovis].influence of bacteriophages of streptococcus bovis on microbial activity in the rumen was investigated in experiments on cows. main elements of the mechanism of bacteriophage action on the microflora have been detected. the daily feeding with bacteriophages results in productive infection of sensitive to them rumen bacteria and is associated with increasing bacteriophage concentration in the rumen contents, lower number and activity of amylolytic bacteria, higher cellolytic activity and increase ...19947845249
cyclic amp in ruminal and other anaerobic examination of camp levels in predominant species of ruminal bacteria and other anaerobic bacteria was conducted. cellular camp concentrations of glucose-grown cultures of butyrivibrio fibrisolvens 49, prevotella ruminicola d31d, selenomonas ruminantium hd4 and d, megasphaera elsdenii b159, streptococcus bovis jb1, bacteroides thetaiotaomicron 5482, and clostridium acetobutylicum atcc 824 were determined at various times during growth by a competitive binding radioimmunoassay procedure. the r ...19947851742
[rumen bacteria degrading toxic mimosine and dihydroxypyridine compounds in china].four anaerobic strains were isolated from the rumen of the cattle which no specific toxic symptoms were seen when leucaena was fed in weizhou island beihai city, guangxi province, china. all of these strains (br-1, br-2, br-5 and br-7) possess degradative activities to toxic mimosine, 3-hydroxy-4 (1h) -pyridone (3, 4-dhp) and 2, 3-dihydroxypyridine (2, 3dhp) from leucaena, that were confirmed by analysis of hplc. pure and mixed cultures of these four strains in vitro degraded 44-59% of mimosine, ...19947871781
spontaneous peritonitis caused by streptococcus bovis. 19947876523
[formate metabolism by lactate-producing and lactate-utilizing rumen bacteria].physiological concentrations [< 11 mm] of formate do not violate the metabolism of s. bovis and m. elsdenii. a significant inhibition is caused by concentrations of 22 and 44 mm. in this case the process of ammonia formation in s. bovis is inhibited more pronouncedly. peculiar effects of formate (11 mm) on ldh, fdh, aconitase, isocitrate dehydrogenase, fumarase, l-mdh and malic-enzyme have been stated. the changes show that it enhances assimilation of sugars fermented to lactate in s. bovis, in ...19947879287
use of cephalexin-aztreonam-arabinose agar for selective isolation of enterococcus faecium.cephalexin-aztreonam-arabinose agar (caa), a new selective agar, was examined in comparison with nalidixic acid-colistin agar for the differentiation of enterococcus faecium from other enterococci and the ability to isolate the organism from feces. two hundred sixteen enterococcus isolates and a variety of gram-positive and gram-negative control strains were inoculated onto both media. all control strains of e. faecium were easily differentiated from enterococcus faecalis and enterococcus durans ...19947883889
immunity in pigeons against homologous and heterologous serotypes of streptococcus bovis after infection.groups of 20, 20 and 10 pigeons were intravenously inoculated with 1 x 10(9) cfu of a streptococcus bovis serotype 1, 2 and 3 strain, respectively. groups which received the highly virulent serotypes 1 or 2 strains were treated with antibiotics starting from 2 days post inoculation in order to prevent the development of clinical signs. pigeons inoculated with the low virulence s. bovis serotype 3 strain were left untreated. another group of 10 non-inoculated pigeons was used as challenge control ...19947886926
[pulmonary valve endocarditis caused by streptococcus bovis].the authors report a case of isolated infective endocarditis of the pulmonary valve due to streptococcus bovis in a 62-year-old male presented with delayed fever of unknown origin. there were no predisposing factors such as i.v. drug abuse or congenital heart disease. the clinical course was complicated with an epidose of pulmonary emboli occurring after the onset of treatment. the patient responded to the appropriate antibiotics without requiring valve surgery. the association of streptococcus ...19947917382
streptococcus bovis osteomyelitis of the ilium. 19947948534
strep bovis endocarditis and colonic carcinoma. 19947960660
streptococcus sanguis bacteremia and colorectal cancer: a case report.streptococcus sanguis, usually considered a nonpathogen of the oral cavity, was isolated from blood cultures from a patient who was subsequently found to have a cecal adenocarcinoma. further studies are needed to determine if streptococcus sanguis infections have diagnostic implications similar to those of streptococcus bovis.19957968799
[rumen bacterial metabolism as affected by extracellular redox potential].the redox potential (eh) in the digestive tract of ruminants varies mostly within the ranges from -300 to +200 mv, in the rumen medium: from -130 to -200 mv. eh and ph changes are of a linear character. enhanced fermentation moves eh towards negative values and improves growth of microorganisms. eh values become even more negative as affected by na2s, naoh, cysteine and nahso3. addition of picrate, sodium nitrate, hydrochloric acid, copper sulphate, gaseous oxygen and particularly heavy metals ( ...19947974836
[staphylococcus bovis infective endocarditis associated with gastric adenocarcinoma]. 19947983908
prevalence of streptococcus bovis in racing pigeons.the prevalence of s. bovis in the intestinal tract of healthy racing pigeons was determined. crop and cloaca swab samples obtained from 810 pigeons from 14 different lofts and from 122 pigeons that were presented for routine health control were examined for the presence of s. bovis. pooled faecal samples were also obtained from pigeons in 82 different pigeon lofts. s. bovis was isolated from crop or cloaca samples of approximately 40% of pigeons of all ages by direct culture and from 80% of the ...19947985358
tumors of the colon increase the risk of developing streptococcus bovis endocarditis: case-control study. 19947986925
alternative strategies of 2-deoxyglucose resistance and low affinity glucose transport in the ruminal bacteria, streptococcus bovis and selenomonas ruminantium.streptococcus bovis and selenomonas ruminantium grew in the presence of the glucose analog, 2-deoxyglucose (2-dg), but the cells no longer had high affinity glucose transport. in s. bovis, 2-dg resistance was correlated with a decrease in phosphoenolpyruvate (pep)-dependent glucose phosphotransferase (pts) activity. the 2-dg-selected s. bovis cells relied solely upon a low affinity, facilitated diffusion mechanism of glucose transport and a 2-dg-resistant glucokinase (atp-dependent). the glucoki ...19947988891
regulation of two aspartokinase isozymes in streptococcus bovis.streptococcus bovis has been found to contain two distinct aspartokinases that can be separated by gel filtration chromatography. one of these isozymes elutes on sephadex g-200 gel filtration at a molecular weight greater than 250,000. the molecular weight of the other isozyme is approximately 125,000. the earlier peak of aspartokinase activity is slightly inhibited by meso-diaminopimelate, while the second peak is sensitive to inhibition by lysine. the latter aspartokinase is not formed when th ...19948012909
[bacterial endocarditis: current bacteriological data].the bacteria causing infective endocarditis have not changed significantly despite the diversity of potential portals of entry. streptococci (viridans) cause 35 to 45% of cases of endocarditis. group d streptococci of gastrointestinal origin cause about 20% of cases of endocarditis: streptococcus bovis is the most commonly isolated species followed by the enterococcus. the beta-haemolytic streptococci of groups a, b, c and g are rarely isolated. seventeen to thirty per cent of endocarditis is ca ...19938024385
influence of yucca shidigera extract on ruminal ammonia concentrations and ruminal extract of the desert plant yucca shidigera was assessed for its possible benefit in ruminal fermentation. the extract bound ammonia in aqueous solution when concentrations of ammonia were low (up to 0.4 mm) and when the extract was added at a high concentration to the sample (20%, vol/vol). the apparent ammonia-binding capability was retained after autoclaving and was decreased slightly following dialysis. acid-precipitated extract was inactive. no evidence of substantial ammonia binding was ...19948031077
energy-spilling reactions of streptococcus bovis and resistance of its membrane to proton conductance.glucose-excess cultures of streptococcus bovis consumed glucose faster than the amount that could be explained by growth or maintenance, and nongrowing chloramphenicol-treated cells had a rate of glucose consumption that was 10-fold greater than the maintenance rate. because n,n-dicyclohexylcarbodiimide, an inhibitor of the membrane-bound f1f0 atpase, eliminated the nongrowth energy dissipation (energy spilling) without a decrease in atp and the rate of energy spilling could be increased by the ...19948031089
endocarditis associated with anca.we report the case of a patient exhibiting subacute bacterial endocarditis (seb) associated with vasculitis and signs of nephritis. c-anca were present at high titer. this observation suggests that anca may be associated with vascular injury in seb.19948039291
[bacteremia caused by streptococcus salivarius and s. milleri, and colonic carcinoma].there is a well-known association between colon carcinoma and bacteraemia with streptococcus bovis biotype i. there are also associations, less well known, with other streptococci of the viridans group. in three patients, a man of 44, a woman of 53 and one of 52 years old, colorectal carcinomas were diagnosed in association with bacteraemia with s. salivarius, s. milleri, and s. salivarius respectively.19948065473
binding of radiolabeled monensin and lasalocid to ruminal microorganisms and feed.gram-negative, ionophore-resistant ruminal bacteria and gram-positive, ionophore-sensitive species bound similar amounts of [14c]lasalocid, but neither group bound large amounts of [14c]monensin. membrane vesicles also bound more lasalocid than monensin (p < .05). the binding was first-order at low cell or vesicle concentrations and saturable at high cell or vesicle densities. streptococcus bovis was inhibited by both monensin and lasalocid (5 microm), but cells that were re-incubated in medium ...19948071190
[analysis of key enzyme activities involved in aspartate amino acid biosynthesis in streptococcus bovis].the first and the third steps in the aspartate biosynthesis pathway in streptococcus bovis are catalyzed by two different forms of aspartokinase and a single homoserine dehydrogenase, respectively. these enzymes can be separated by ammonium sulfate fractionation and gel filtration on sephadex g-200. the two aspartokinase isozymes differ in molecular weights and are subject to differential regulation. the aspartokinase system of s. bovis is characterized by the absence of specific negative allost ...19948117840
development of infection with streptococcus bovis and aspergillus sp. in irradiated mice after glycopeptide therapy.the use of ofloxacin and glycopeptides was evaluated for the treatment of infections arising in c3h/hen female mice irradiated with 8.3 gy from a 60co source. the 21 day regimen began 72 h after irradiation when each of five sets of experimental animals received three antimicrobial therapy regimens and a saline-treated control group. with 40 mice in each group, 20 were used to monitor survival, 20 for the recovery of bacteria from the liver culture. treatment groups were oral ofloxacin 20 mg/kg/ ...19938125835
an unusual outbreak of streptococcus bovis septicaemia in racing pigeons (columba livia).in december 1991, an outbreak of streptococcus bovis septicaemia occurred in a belgian pigeon loft where 25 male and 25 female racing pigeons were housed. the main clinical signs included inability to fly and poor breeding results. none of the female pigeons and only one male pigeon was able to fly. nine affected pigeons were necropsied. histologically a tenosynovitis of the tendon of the deep pectoral muscle was observed in most of them and s bovis was isolated from the canalis triosseus or the ...19948135007
streptococcus bovis endocarditis presenting as acute spondylodiscitis. 19948156317
streptococcus bovis bacteremia and meningitis associated with strongyloides stercoralis colitis in a patient infected with human immunodeficiency virus.we present a case of human immunodeficiency virus (hiv) infection complicated by streptococcus bovis meningitis and bacteremia and severe strongyloides stercoralis colitis. the association between s. bovis infection and strongyloidiasis has not been described previously. this case highlights the importance of searching for larvae of s. stercoralis as part of the evaluation of the gastrointestinal tract of patients with bacteremia or meningitis due to certain enteric organisms. the role of hiv in ...19948161638
[pulmonary valve endocarditis caused by streptococcus bovis]. 19948162846
conjugative transfer of tetracycline resistance in rumen streptococcal 11% of tested streptococcus bovis strains a conjugative transfer of tetracycline resistance was observed when mating experiments were carried out on membrane filters. the recipient strain used was s. bovis bm114 with chromosomal resistance to rifampicin. in addition, in two strains tetracycline resistance was transferred also to recipient strain enterococcus faecium al6. the transfer frequencies were in the range of 10(-6) to 10(-3). the donor strains were screened for the presence of plasmid ...19948181787
[lumbago and constitutional symptoms in a 79-year-old man]. 19948183001
probiotics and manipulation of rumen development and function.there is good evidence that the bacterial and fungal probiotics are effective in the manipulation of rumen development and function. the effects of adherent streptococcus bovis preparations were manifested by significant increase of adherent s. bovis bacteria and alpha amylase activity in the rumen wall of young ruminants. fungal probiotics based on saccharomyces cerevisiae and aspergillus oryzae are rapidly gaining acceptance as a means of improving productivity in adult ruminants. however, fun ...19938215880
streptococcus bovis meningitis: no association with colonic malignancy. 19938218715
a case of infective endocarditis in a farmer caused by streptococcus equinus.the following is a case report of a farmer with documented aortic valve disease who developed bacterial endocarditis secondary to streptococcus equinus. this is a rare pathogen in man and its acquisition in this case may be related to the subject's occupation.19938223744
[pulmonary valve endocarditis, bilateral deep vein thrombosis amd recurrent pulmonary emboli].a 57-year-old obese man with hypertensive heart disease and long-standing varicose veins developed recurrent bouts of fever, lung infiltrations, cardiac arrhythmias and increasing dyspnoea. on admission multiple lung emboli and bilateral deep vein thromboses were confirmed. the echocardiogram demonstrated floating vegetations on all three pulmonary valve cusps. biochemical tests indicated an inflammatory constellation (esr 62/105 mm, c-reactive protein 13.3 mg/dl), partial respiratory insufficie ...19938243249
comparative effect of salinomycin and monensin on streptococcus bovis strain atcc 9809.the effect of salinomycin (2.5 mg/l) on the in vitro growth of streptococcus bovis strain atcc 9809, on its catabolism of glucose and on its anabolism of lactic acid was compared with that of monensin (5.0 mg/l). in control cultures containing no ionophore, glucose consumption and lactic acid production were completed concomitantly with maximal growth which was reached after 2 h of incubation at 37 degrees c. no further growth of s. bovis was observed within 2 h after the addition of one or the ...19938264432
the inhibition by ionophores in vitro of an enterococcus-like pathogen of rainbow trout, oncorhynchus mykiss.streptococcosis is a major disease of several fish species in australia, japan and south africa. the minimum inhibitory concentration of some ionophores (lasalocid, monensin, narasin and salinomycin) was determined in vitro for an enterococcus-like species pathogenic for rainbow trout (oncorhynchus mykiss) in australia. forty isolates of the fish pathogen were tested, together with control strains of staphylococcus aureus atcc 29213, enterococcus faecalis atcc 29212 and streptococcus bovis atcc ...19938273272
serological investigation into the association between streptococcus bovis and colonic determine if there was an increase in antibody titre to streptococcus bovis in patients with colonic cancer, and if this might be a useful marker of the presence for colonic cancer.19938282836
prevalence of antibodies to streptococcus bovis serotype 1 in racing pigeons.indirect elisa techniques for the detection of antibodies to s. bovis serotypes 1, 2 and 3 in pigeon plasma were developed. whole formaldehyde-inactivated bacteria were used as coating antigens. bound antibodies were detected with peroxidase-conjugated rabbit anti-pigeon serum and opd and h2o2 as chromogen and substrate, respectively. elisa was used to determine the prevalence of antibodies to s. bovis serotype 1 in healthy belgian racing pigeons. antibodies were demonstrated in 83 (= 37%) of 22 ...19938284963
molecular cloning and expression of two alpha-amylase genes from streptococcus bovis 148 in escherichia coli.the alpha-amylase genes of streptococcus bovis 148 were cloned in escherichia coli mc1061, using pbr322. the recombinant plasmids were classified into two groups on the basis of their restriction maps. southern blot analysis did not show homology between the two types of alpha-amylase genes, and the two alpha-amylase genes existed on the chromosomal dna of s. bovis 148. the enzymatic properties and n-terminal amino acid sequences of the two purified enzymes produced by the cloned e. coli strains ...19938285674
[regulation of enzymes of the first and last stage of lysine biosynthesis in streptococcus bovis and enterococcus faecium].regulation of aspartate kinase and diaminopimelate decarboxylase activities in streptococcus bovis and enterococcus faecium cell-free extracts was studied. the levels of synthesis of aspartate kinase and diaminopimelate decarboxylase in both microorganisms are growth-dependent. the synthesis of these enzymes is depressed by lysine, but the activity of aspartate kinase is induced by addition of this amino acid and threonine to the reaction system. meso-diaminopimelate dehydrogenase activity was n ...19938289839
recurrent infective endocarditis.infective endocarditis is a serious disease associated with high mortality. patients surviving recurrent bouts of infective endocarditis are reported infrequently. we report on a non-drug abuser patient who experienced seven episodes of infective endocarditis--the largest number reported to our knowledge in a single non-drug abuser patient.19938290417
acetohydroxy acid synthase and threonine deaminase activities, and the biosynthesis of isoleucine-leucine-valine in streptococcus bovis.acetohydroxy acid synthase (ahas) and threonine deaminase (td) activities were found in streptococcus bovis and shown to be involved in the biosynthesis of the branched chain amino acids isoleucine, leucine and valine. apparent lack of repression of ahas synthesis by the end-products and reduced sensitivity of s. bovis growth to analogues of the branched chain amino acids suggested that secretion of isoleucine, leucine and valine in the growth medium may be a consequence of the regulatory featur ...19938310179
use of modified rambach agar to differentiate streptococcus uberis from other mastitis streptococci.the medium of rambach was modified to permit differentiation of mastitis streptococci. a total of 377 streptococci isolated from bovine imi was used in the study. of the 159 strains identified as streptococcus uberis, 151 strains (94.9%) were beta-galactosidase-positive and yielded blue colonies on modified rambach agar. in comparison, streptococcus agalactiae, streptococcus dysgalactiae, enterococcus saccharolyticus, or enterococcus faecalis strains were negative for propylene glycol utilizatio ...19938326035
effect of amino acids on the heat production and growth efficiency of streptococcus bovis: balance of anabolic and catabolic rates.streptococcus bovis jb1 grew nearly twice as fast (0.9 versus 1.6 h-1) and had a 40% greater growth yield (18 versus 12.5 mg of protein per mmol of glucose) when an ammonia-based medium was supplemented with amino acids, but the glucose consumption rate (88 mumol mg of protein-1 h-1) and specific rate of heat production (2.1 mw/mg of protein) were unaffected. amino acid availability had little effect on the catabolic rate, but the specific heat decreased 40% (8.8 to 5.2 j/mg of protein). these g ...19938328799
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