| group g streptococcal endocarditis. | the group g streptococcus may be a more common human pathogen than previously recognized. a case of group g streptococcal endocarditis is reported and the 11 cases reported previously are reviewed. group g endocarditis may have significant clinical and prognostic differences from endocarditis caused by the more commonly identified viridans or group d streptococci. routine serologic grouping of beta-hemolytic streptococcal isolates from serious infections is warranted. | 1978 | 100003 |
| effects of dispersed recreational activities on the microbiological quality of forest surface water. | the microbiological quality of forest surface waters in the greenwater river watershed was examined to investigate the influence of heavy motorized camping in an area with no sanitary facilities. indicator densities increased during weekend human-use periods when compared to weekdays. increases in indicator densities were also noted downstream from heavily used camping areas when compared to upstream sites. seasonal, weekly, and diurnal fluctuations in indicator densities were observed. this stu ... | 1978 | 100055 |
| [immunoluminescent method for detecting enterococci in dairy products]. | | 1978 | 100374 |
| a review. the use of disinfectants in the home. | | 1978 | 100484 |
| a new hydrolase specific for taurine-conjugates of bile acids. | through the investigation of the bile acid-deconjugation activities of human intestinal anaerobes, a new enzyme was discovered in peptostreptococcus intermedius which hydrolyzed specifically the taurine-conjugates, but not the glycine-conjugates of bile acids. however, the enzymes in streptococcus faecalis and lactobacillus brevis hydrolyzed chiefly the glycine-conjugates. | 1978 | 100491 |
| sex pheromones in bacteria. | | 1978 | 100707 |
| laser differential light scattering bioassays for selected antitumor agents. | bioassay methods for actinomycin d, 6-thioguanine, and adriamycin which utilize laser light scattering from suspensions of drug-sensitive bacteria have been developed. in 3 hours, serum and urine levels of the 3 drugs can be reproducibily measured. a sample volume of 0.1 ml may be assayed with a precision of +/- 10%. the linear response range for actinomycin d was 0.03 to 3.0 microgram/ml. for 6-thioguanine and adriamycin the linear responses range was 0.03 to 10.0 and 0.25 to 10.0 microgram/ml, ... | 1978 | 100836 |
| cerebral arterial lesions resulting from inflammatory emboli. | in order to study the effects of septic embolism on the brain, silicone rubber emboli of various types were injected into the carotid arteries of 35 dogs. pathologic and angiographic studies were performed to assess the resultant arterial and parenchymal lesions. pure silicone rubber emboli (14 dogs) produced occasional intra-arterial thrombosis but no arteritis. sterile and bacterially contaminated emboli containing a lead-chromate pigment (similar to those used in previous studies of septic em ... | 1978 | 100907 |
| enterococcal endocarditis: duration and mode of treatment. | this report summarizes data on sixteen patients with enterococcal endocarditis treated with penicillin and streptomycin. the experience reported suggests that a four week period is adequate for routine therapy in these patients, as in other forms of streptococcal endocarditis. it provides an additional group of patients successfully treated with penicillin and streptomycin. two relapses were encountered. one of these received inadequate daily doses of penicillin. the other patient was clearly a ... | 1978 | 100924 |
| hemolytic streptococci in supramammary lymph nodes from healthy pigs from the peruvian jungle. | hemolytic streptococci were isolated from 53 percent (18) supramammary lymph nodes from healthy adult pigs raised at the peruvian jungle. the isolates were identified as streptococcus zooepidemicus, streptococcus infrequens, streptococcus faecalis and groups p and s. the possible significance of the findings are discussed. | 1978 | 101478 |
| [urobilinogen excretion in the urine and bacterial overgrowth in the jejunum of patients with jejuno-or ileo-transversostomy in man (author's transl)]. | | 1978 | 101703 |
| [prevention of bacterial endocarditis]. | | 1978 | 101706 |
| experimental renal infection: acute and chronic studies of histology and function. | experimental renal infections have resulted in histologic lesions of acute and chronic pyelonephritis, but in most studies the urinary tract has been "traumatized" to induce persistent infection. sequential functional alterations have been measured infrequently. the present studies were designed to separate the functional and histological changes caused by high pressure sterile reflux from reflux with pathogenic organisms. reproducible disruption of the pelvic epithelium with extravasation of so ... | 1978 | 101708 |
| studies on virus-inhibiting substances of bacterial origin. iv. antiviral substances extractable from streptococcus faecalis: its in vivo effect. | | 1978 | 101714 |
| studies on virus-inhibiting substances of bacterial origin. i. introduction. | | 1978 | 101715 |
| studies on virus-inhibiting substances of bacterial origin. ii. inhibition of animal virus plaque formation by culture filtrates of lactic acid bacteria. | | 1978 | 101716 |
| studies on virus-inhibiting substances of bacterial origin. iii. antiviral substance extractable from streptococcus faecalis: its in vitro activities and some biological characteristics. | | 1978 | 101717 |
| effect of diet on adhesion and invasion of microflora in the intestinal mucosa of chicks. | | 1978 | 101987 |
| [the etiology of foul brood]. | five hundred and thirty-six samples of honeycombs were examined in a laboratory in the years 1971-1974. in all the samples clinically determined as the foul brood, b. alvei was isolated as a pure culture, and enterococci, or both microorganisms were isolated in mixed form. twenty-five strains of the isolated streptococci were analyzed microbiologically and biochemically; on the basis of their culture and biochemical characteristics five strains were designated as streptococcus faecalis, 14 strai ... | 1978 | 102071 |
| non-group d streptococcal meningitis misidentified as enterococcal meningitis. diagnostic and therapeutic implications of misdiagnosis by screening microbiology. | two patients had nonhemolytic gram-positive coccal meningitis. both pathogens were initially misidentified as a group d enterococcus by growth in "selective" media, which led to the use of inappropriate and potentially toxic systemic and intrathecal aminoglycosides. careful evaluation of the antibiotic sensitivity data and additional microbiological studies allowed correct identification of the organism. the important diagnostic and therapeutic considerations in differentiating true enterococcal ... | 1978 | 102268 |
| [titration method of detecting and quantitatively counting enterococci]. | | 1978 | 102565 |
| folate antagonists. 13. 2,4-diamino-6-](alpha,alpha,alpha-trifluoro-m-tolyl)thio]quinazoline and related 2,4-diamino-6-[(phenyl- and naphthyl)thio]quinazolines, a unique class of antimetabolites with extraordinary antimalarial and antibacterial effects. | an array of nonclassical thioquinazoline analogues (viii) of methotrexate was prepared by cyclization of the requisite 2-amino-5-(arylthio)benzonitrile with chloroformamidine hydrochloride (28--79%). the aminonitrile precursors were obtained by sncl2-hcl reduction (28--99%) of the corresponding 2-nitro-5-(arylthio)benzonitriles, which were synthesized by the condensation of the appropriate 5-chloro-2-nitrobenzonitriles with various arylthiols (36--83%). many of the thioquinazolines (viii) showed ... | 1978 | 102792 |
| [experiences with the uripret-system in pediatric practice (author's transl)]. | the present study reports on the application of the uripret-system for identification and susceptibility testing of microbial agents causing urinary tract infections carried out in a pediatric outpatient clinic. the findings were compared with those determined with the conventional methods in an institute of medical microbiology. for the detected mono- and mixed-cultures, in 85% of the cases a concurrent result of both methods was found. only in one case a different microbial agent genus was det ... | 1979 | 102911 |
| damage and recovery in streptococci. | | 1978 | 103202 |
| susceptibility of the anaerobic bacteria, group d streptococci, enterobacteriaceae, and pseudomonas to semisynthetic penicillins: carbenicillin, piperacillin, and ticarcillin. | sodium piperacillin t-1220, a new semisynthetic penicillin, was tested in vitro against 297 clinical isolates of anaerobic bacteria and 669 aerobic bacteria by the conventional agar dilution method and compared with carbenicillin and ticarcillin. at a 100-mug/ml concentration the three drugs showed comparable effectiveness against the anaerobes tested. however, at 20 mug/ml, piperacillin was the most effective drug against bacteroides fragilis, peptostreptococci, and group d streptococci. at thi ... | 1978 | 103491 |
| oligosaccharides and polysaccharides specifically utilizable by bifidobacteria. | | 1978 | 103638 |
| [routine test for sensitivity (author's transl)]. | the agar diffusion test is a simple but in most instances reliable method for the determination of the sensitivity of pathogenic bacteria, if it is performed under controlled standardised conditions and evaluated by defined criteria. the accuracy of the test results can be achieved by a permanent control of the test with control strains during routine testing. | 1978 | 103803 |
| comparison of eight media-procedures for recovering faecal streptococci from water under winter conditions. | | 1978 | 103873 |
| an assessment of methods used to determine protein quality. | | 1978 | 104444 |
| characterization of plasmids in bacteriocin producing strains of streptococcus faecium. | four bacteriocin (enterocin) producing strains of streptococcus faecium were examined for extrachromosomal dna. three strains proved to harbor minicircular plasmid dna of uniform length as evidenced by cscl ethidium bromide density centrifugation and electron microscopy. molecular weight determination obtained through contour length measurements showed 2.4 x 10(6) dalton for s. faecium 25, 3.4 x 10(6) dalton for s. faecium 3 and 3.8 x 10(6) dalton for s. faecium 59. elimination experiments for b ... | 1978 | 104480 |
| treatment of bacterial endocarditis with vancomycin. | five patients with bacterial endocarditis who were allergic to penicillin were treated successfully with vancomycin. the causative microorganisms were streptococcus bovis, s faecalis, s agalactiae, s intermedius, and staphylococcus aureus. except for the strain of s faecalis, vancomycin was bactericidal against these organisms at easily achievable serum concentrations. to insure a bactericidal serum titer of 1:8 or greater, streptomycin was added in the therapy of the case caused by s faecalis. ... | 1978 | 104623 |
| validity of fecal coliforms, total coliforms, and fecal streptococci as indicators of viruses in chlorinated primary sewage effluents. | quantities of combined chlorine that usually destroyed more than 99.999% of the indigenous fecal coliforms, total coliforms, and fecal streptococci in primary sewage effluents destroyed only 85 to 99% of the indigenous viruses present. viruses were recovered from five of eight chlorinated primary effluents from which fecal coliforms were not recovered by standard most-probable-number procedures. the limited volumes of such chlorinated effluents that can be tested for indicator bacteria with curr ... | 1978 | 104657 |
| microbial impact of canada geese (branta canadensis) and whistling swans (cygnus columbianus columbianus) on aquatic ecosystems. | quantitative and qualitative analyses of the intestinal bacterial flora of canada geese and whistling swans were carried out with the finding that wild birds harbor significantly more fecal coliforms than fecal streptococci. the reverse was typical of captive and fasting birds. neither salmonella spp. nor shigella spp. were isolated from 44 migratory waterfowl that were wintering in the chesapeake bay region. enteropathogenic escherichia coli were detected in seven birds. geese eliminated 10(7) ... | 1979 | 104659 |
| [hazards to cardiac patients from bacteremia after dental surgery]. | | 1978 | 104859 |
| effects of local anesthetics on bacterial cells. | the membrane effects of chlorpromazine, nupercain, tetracain, and procain were studied using bacillus cereus, b. megaterium, b. subtilis, and streptococcus faecalis, protoplasts from s. faecalis, and isolated membranes from b. subtilis. chlorpromazin, nupercain, and tetracain produced characteristic micromorphological alterations after treatment for 5 to 30 min at ph 7.0 and 20 degrees c; the membrane staining pattern changed from asymmetric to symmetric, complex mesosome-like structures appeare ... | 1979 | 104970 |
| localization of membrane-derived oligosaccharides in the outer envelope of escherichia coli and their occurrence in other gram-negative bacteria. | the glucose-containing, membrane-derived oligosaccharides of escherichia coli are localized in the external envelope of that organism, most probably in the periplasmic space. the membrane-derived oligosaccharides appear to be generally occurring cell constituents of gram-negative (but not gram-positive) bacteria. | 1979 | 104978 |
| effect of serum on gram-positive cocci grown in the presence of penicillin. | strains of staphylococcus aureus, streptococcus faecalis, streptococcus bovis, and a strain of streptococcus that produces filaments were grown on agar containing penicillin at concentrations of one-half to 1/10th the minimal inhibitory concentration. these penicillin-exposed organisms as well as untreated control organisms were incubated with human serum of plasma. both serum and plasma produced a remarkable bactericidal effect on the filament-forming streptococcus grown in the presence of peni ... | 1978 | 105057 |
| amphipathic antigens of oral microorganisms - immunogenicity and other biological properties. | | 1978 | 105572 |
| in-vitro methods for determining minimal lethal concentrations of antimicrobial agents. | to determine the minimal lethal concentration of an antimicrobial agent, broth dilution tests may be performed and then a sample from each tube showing no visible growth may be subcultured onto a drug-free agar medium. by counting the number of viable cells recovered from each tube, the minimal concentration of drug required to kill 99.9% of the cells in the initial inoculum can be determined. studies were undertaken to determine the circumstances under which false-negative tests could occur as ... | 1979 | 105628 |
| comparative in vivo nitrogen-15 nuclear magnetic resonance study of the cell wall components of five gram-positive bacteria. | the proton-decoupled 9.12 mhz 15n nmr spectra of 15n-labeled bacillus subtilis, bacillus licheniformis, staphylococcus auresu, streptococcus faecalis, and micrococcus lysodeikticus intact cells, isolated cells walls, and cell wall digests have been examined. the general characteristics of gram-positive bacteria 15n nmr spectra and described and spectral assignments are provided, which allow in vivo 15n nmr to be applied to a wide range of problems in bacterial cell wall research. the qualitative ... | 1979 | 105756 |
| [isolation of beta-hemolytic streptococci in proctology]. | | 1978 | 105958 |
| a new sequence-specific endonuclease from streptococcus faecalis subsp. zymogenes. | a new sequence-specific endonuclease, sfai, has been partially purified from streptococcus faecalis subsp. zymogenes. sfai recognizes the tetranucleotide sequence 5'g-g-c-c 3' 3' c-c-g-g 5' and cleaves it at the sites indicated by the arrows. | 1978 | 105969 |
| precursor-product relationship of intracellular and extracellular lipoteichoic acids of streptococcus faecium. | exponential biosynthesis and excretion of lipoteichoic acid (lta) during the exponential phase of growth, and continued synthesis and excretion during valine starvation of streptococcus faecium (s. faecalis atcc 9790), were shown. during exponential growth, extracellular lta (ltax) accounted for approximately 13% of the total lta in cultures, whereas during valine starvation, this percentage increased to approximately 60% within 4 h. ltax was present in a low-molecular-weight, apparently deacyla ... | 1979 | 106043 |
| antibacterial activity of nitroxoline and sulphamethizole alone and in combination in urinary tract infections. | in vitro studies on the antibacterial activity of nitroxoline and sulphamethizole, alone and in combination, were undertaken and minimal inhibitory concentrations (mics) determined on a range of urinary pathogens. eighty per cent of the strains tested were sensitive to less than or equal to 16 mg/l of nitroxoline, and all strains, including pseudomonas aeruginosa and streptococcus faecalis, were sensitive to less than or equal to 64 mg/l of nitroxoline. no synergism could be demonstrated with su ... | 1978 | 106479 |
| tk polyagglutination associated with reduced a and h activity. | tk polyagglutinable erythrocytes are described in which a and h activities were reduced. it is suggested that bacteroides fragilis isolated from cultures of the patient's blood was responsible for each of these membrane modifications. | 1978 | 106548 |
| systemic group d streptococcal infection in newborn infants. | thirteen cases of group d streptococcal neonatal sepsis and/or meningitis were identified at the cincinnati children's hospital from 1970 to 1976. ages at onset of disease ranged from 1 to 25 days. the most frequent symptoms were fever (five cases), lethargy (five cases), and respiratory difficulty (four cases). blood cultures for seven infants were positive; csf cultures for five infants were positive; and csf and blood cultures for one infant were both positive. in 12 patients, parenteral anti ... | 1979 | 106722 |
| the chediak-higashi syndrome: quantitation of a deficiency in maximal bactericidal capacity. | the maximum bactericidal capacity of neutrophils from a patient with the chediak-higashi syndrome (chs) was measured by a quantitative assay in which the neutrophils were challenged with increasing multiples of staphylococcus aureus, 502a. at various bacterial challenges from 0.5 to 65 bacteria per neutrophil, the chs cells killed normal numbers of bacteria in 60 minutes. however, at higher ratios with a mean of 118 bacteria per neutrophil, the percentage of bacteria killed in 60 minutes by chs ... | 1979 | 106731 |
| the methylenetetrahydrofolate-mediated biosynthesis of ribothymidine in the transfer-rna of streptococcus faecalis: incorporation of hydrogen from solvent into the methyl moiety. | | 1979 | 106850 |
| incidence and relationship of group d streptococci with other indicator organisms in meats. | raw and processed meats were analyzed for presumptive group d streptococci using kf streptococcus agar. counts were compared with coliform, presumptive escherichia coli, and enterobacteriaceae counts but no meaningful relationships were observed. results indicated that group d streptococci and e. coli type i were principally contaminants from the packing plant, rather than at retail level. the predominating group d streptococcus in both beef and pork cuts was streptococcus faecalis, while in pro ... | 1978 | 106944 |
| effect of active and passive antibacterial immunization on skin allograft survival in rabbits. | the effect of active and passive antibacterial immunization on transplantation immunity was investigated in rabbits. immunization with dead bacterial vaccines prepared from e. coli, proteus mirabilis and pseudmonas aeruginosa had no effect on skin allograft survival, whereas immunization with vaccines prepared from streptococcal and staphylococcal strains shortened allograft survival. similar results were obtained with specific antisera against individual microbial species. skin allografts survi ... | 1979 | 107050 |
| carriage of group d streptococci in the human bowel. | sixty faecal samples, 39 from adults and 21 from neonates, were investigated by means of a simple scheme to isolate and identify any group d streptococci present. a number of differences were found between the two groups. group d streptococci were absent from 43% of the neonates compared with only 13% of the adults; streptococcus bovis was commoner in the neonates (23.8%) than in the adults (5%), and streptococcus faecium was not isolated from any of the infant samples although it was common in ... | 1978 | 107199 |
| [inorganic ion transport in bacteria]. | | 1979 | 107670 |
| generation rates of faecal streptococci in various vehicles. | potassium tellurite media gave the highest detrimental effects on the generation number of all tested faecal streptococci species. this applies to all investigated vehicles. however, drastic tellurite effects became more conspicuous with certain vehicles than with others. this is particularly true with acid and alkaline foods and water, especially with strains like streptococcus bovis, str. faecium, and str. durans. again, tellurite becomes more influencial with regard to old cells rather than y ... | 1978 | 107679 |
| [lactic acid bacteria and streptococci of the human stomach normally and in pathological processes]. | lactic acid bacteria were either absent or present in negligent quantities in the stomach of apparently healthy man. but in case of various pathological processes in the stomach and duodenum lactic acid bacteria accumulated (up to a million cells per 1 ml of gastric contents). under these conditions coccal forms sharply prevailed over the bacillary ones. in patients with chronic gastritis and peptic ulcer of the stomach the most frequent were streptococcus faecalis and its variants; in oncologic ... | 1979 | 107685 |
| streptococcus faecalis organisms inhibit tumour growth. | | 1978 | 108213 |
| protection afforded by streptococcus faecalis rna fraction in experimental candidiasis of mice. | | 1978 | 108214 |
| enzymatic deacylation of lipoteichoic acid by protoplasts of streptococcus faecium (streptococcus faecalis atcc 9790). | high-molecular-weight, micellar lipoteichoic acid (lta) was converted to a lower-molecular-weight, apparently deacylated polymer when the former was incubated in the presence of growing protoplasts of streptococcus faecium (s. faecalis atcc 9790), but not when incubated in fresh or spent protoplast medium. the mobility of the low-molecular-weight polymer upon agarose gel electrophoresis was indistinguishable from that of native extracellular lipoteichoic acid lta(x) from this organism or from ch ... | 1979 | 108241 |
| morphological and physiological study of autolytic-defective streptococcus faecium strains. | three autolytic-defective mutants of streptococcus faecium (s. faecalis atcc 9790) were isolated. all three autolytic-defective mutants exhibited the following properties relative to the parental strain: (i) slower growth rates, especially in chemically defined medium; (ii) decreased rates of cellular autolysis and increased survival after exposure to antibiotics which block cell wall biosynthesis; (iii) decreased rates of cellular autolysis when treated with detergents, suspended in autolysis b ... | 1979 | 108262 |
| minimal antibiotic concentrations of aminoglycosides and beta-lactam antibiotics for some gram-negative bacilli and gram-positive cocci. | the minimal antibiotic concentration (mac) is the lowest concentration of an antibacterial agent that produces a decrease of 1 log in the number of organisms/ml as compared with a control culture in drug-free medium. various gram-negative bacilli and gram-positive cocci were grown in the presence of amikacin, gentamicin, tobramycin, ampicillin, amoxicillin, oxacillin, carbenicillin, ticarcillin, and cefamandole at concentrations varying from eight times the minimal inhibitory concentration (mic) ... | 1979 | 108345 |
| turnover of protein-bound lipoic acid. | | 1979 | 108509 |
| separation and identification of pteroylpolyglutamates by polyacrylamide gel chromatography. | | 1979 | 109018 |
| surgical management of subphrenic abscess. | | 1979 | 109176 |
| the effect of three frequently applied antibiotics on the colonization resistance of the digestive tract of mice. | the influence of treatment with increasing oral doses of three absorbable antibiotics on the colonization resistance of the digestive tract was investigated in mice. mice treated with ampicillin or epicillin in any of the applied doses had a strongly decreased colonization resistance as demonstrated by 'bacterial overgrowth' after contamination with resistant strains of escherichia coli. after a treatment period 2 weeks, streptococcus faecalis became resistant in a number of animals. oral treatm ... | 1979 | 109500 |
| conjugative r plasmids in streptococcus agalactiae (group b). | | 1979 | 109871 |
| theoretic and experimental analysis of the ability of a commercially prepared system to detect mixtures of bacteria. | the validity of the biochemical identification of bacteria presumes that the inoculum consists of a pure growth of bacteria. the detection of mixtures of bacteria with the analytab enteric (api 20e) system was tested. using a computer to predict the response of the api 20e system to mixed cultures, the presence of a mixture was not detected in 15% of all pairwise combinations of 324 common organisms of the enterobacteriaceae family and in 19% of all pairwise combinations of enterobacteriaceae wi ... | 1979 | 110136 |
| iron requirement and chelator production of staphylococci, streptococcus faecalis and enterobacteriaceae. | the effect of iron deprivation on growth of 101 aerobic strains of gram-positive and gram-negative bacteria was studied on agar media in the presence of various concentrations of the synthetic iron chelator ethylene diamine diorthohydroxyphenyl acetic acid (edda) and the iron binding protein transferrin. growth of staphylococcus epidermidis was inhibited by 15 mm edda and 1.5 mm transferrin. staphylococcus aureus was only inhibited by 44 mm edda and not by transferrin. none of the strains of s. ... | 1978 | 110252 |
| antibody to an artificial disaccharide antigen cross-reactive with neisseria gonorrhoeae lipopolysaccharide. | an artificial antigen was prepared from 4-o-beta-i-galactopyranosyl-d-glucose (lactose) and 8-ethoxycarbonyloctanol. covalent attachment to bovine serum albumin provided an antigen that elicited antilactose antibody in rabbits and goat. these antibodies were active against neisseria gonorrhoeae lipopolysaccharide in passive hemagglutination tests. the same antibody agglutinated cells of streptococcus faecalis, strain n, and precipitated the lactose-containing cell wall diheteroglycan of this org ... | 1979 | 110427 |
| studies with cefuroxime: a new beta-lactamase resistant cephalosporin. | 28 patients suffering from a variety of bacterial infections have been treated with cefuroxime. 18 were cured and 6 improved during treatment. side effects were minimal and intramuscular injection was well tolerated. serum and urine levels well in excess of the mics of sensitive organisms were obtained using dosages of 750 mg 8 hourly. biliary excretion was impaired in the presence of obstruction, but adequate bile levels of cefuroxime were observed following relief of the obstruction. cefuroxim ... | 1979 | 110540 |
| release of autolytic enzyme from streptococcus, faecium cell walls by treatment with dilute alkali. | the autolytic enzyme (endo-beta-1,4-n-acetylmuramoylhydrolase) of streptococcus faecium (s. faecalis atcc 9790) was released in a soluble form from insoluble cell wall-autolytic enzyme complexes by treatment with dilute naoh at 0 degree c. treatment of cell wall-enzyme complexes, obtained from either exponential- or stationary-phase cells, with 0.008 to 0.01 n naoh gave maximum yields of autolytic enzyme activity. at a fixed concentration of naoh, the yield of autolysin increased with increasing ... | 1979 | 110765 |
| deoxyribonucleic acid sequence common to staphylococcal and streptococcal plasmids which specify erythromycin resistance. | plasmids from erythromycin-resistant staphylococcus aureus, streptococcus sanguis, and streptococcus faecalis show deoxyribonucleic acid sequence homology. the homologous sequences can be localized to specific restriction endonuclease fragments, which in the case of s. aureus plasmid pi258 involves a single fragment from either ecori or hindiii digest known to contain the erythromycin resistance determinant. complementary ribonucleic acid probes prepared from s. aureus plasmid pi258 and s. sangu ... | 1979 | 110774 |
| demonstration of an internal fraction plane in cell walls of streptococcus faecalis and streptococcus mutans. | the proposed lower internal density of the gram-positive wall was confirmed by observed an internal fracture plane in the walls of streptococcus faecalis and streptococcus mutans. however, the granular surfaces produced by this cleavage appeared to be more of a reflection of distortion during preparation than of subunit construction. | 1979 | 110784 |
| increased synthesis of ribonucleotide reductase after deoxyribonucleic acid inhibition in various species of bacteria. | the specific activity of ribonucleotide reductase was found to increase significantly after deoxyribonucleic acid inhibition in seven species of bacteria investigated. this group of bacteria includes species with b12-dependent ribonucleotide reductase as well as some with an escherichia coli-type ribonucleotide reductase. | 1979 | 110794 |
| characterization of groups n and d streptococci isolated from rumen fluids. | twelve strains of streptococci of serological groups n and d were isolated from rumen fluids of nine cows on four rations although both groups were not isolated from the same animal. the twelve were representative of a larger number of streptococci isolated by enrichment in milk. generally, the physiological characteristics of the isolates indicated members of the lactic or enterococcus groups; however, several were atypical in one or more of the tolerance tests. physiologically typical streptoc ... | 1979 | 110856 |
| production of single strand breaks in the dna of streptococcus faecalis after mild heating. | | 1979 | 110908 |
| synthesis and biological activity of 8-oxadihydropteridines. | a series of 6-substituted and 6,7-disubstituted pyrimido[4,5-b][1,4]oxazines (8-oxadihydropteridines) was synthesized through the condensation of an alpha-halo ketone and 2,5-diamino-4,6-pyrimidinediol. the resulting 8-oxadihydropteridines were assayed as potential antifolates in a dihydrofolate reductase enzyme system. the 2-amino-4-hydroxyoxa-dihydropteridines were found to possess greater biological activity than the corresponding 2,4-diamino compounds. the pteroic acid homeostere 2-amino-4-h ... | 1979 | 110934 |
| [laboratory diagnosis of group d streptococcus]. | after taxonomic listing of group d streptococci, the authors discuss the methodology of the bacteriologic diagnosis of infections produced by these bacteria, showing the way in which the pathological products are collected, the strains isolated and seeded. the strains are identified in two stages: (1) group identification by group antigen identification, resistance to oxacillin, development at +45 degrees, development on bilaesculin media; (2) species and variety identification by biochemical, p ... | 1979 | 111334 |
| [rapid methods useful for determination of streptococcal groups with special reference to streptococci of groups b and d]. | a study was carried out on the efficiency of certain rapid methods for the identification of streptococcal groups, especially groups b and d, methods based upon physiologic properties such as hippurate hydrolysis, production of pigment, esculin hydrolysis, tolerance to salt and bilolysis, associated with the classical tests, for instance the hemolysis type and sensitivity to bacitracin and optochin. by these tests, accessible to hospital laboratories, a number of 3083 streptococcal strains were ... | 1979 | 111335 |
| an animal model of intra-abdominal sepsis. | | 1979 | 111347 |
| streptococcus faecalis, a bacterial isolate which protects young chickens from enteric invasion by salmonellae. | | 1978 | 111659 |
| viable and total cell masses in dental plaque as measured by bioluminescence methods. | bioluminescence methods have been applied to the measurement of the viable and total cell masses of small samples of dental plaque. the total adenine nucleotide content of dental plaque samples and of a pure culture of bacteria was determined and the adenylate energy charge calculated from this. when a pure culture of bacteria was killed with heat, the adenylate energy charge decreased exponentially with duration of treatment and corresponded with a decrease in the count of viable organisms. | 1979 | 111878 |
| [clinical evaluation of cefazedon on patients with urinary tract infections (author's transl)]. | the efficacy and tolerance of cefazedon, a new antibiotic, was investigated clinically on 90 patients with urinary tract infections who also required surgical treatment. good clinical results were achieved in over 90% of patients after 6 to 7 days of treatment. the bacteriological examination revealed complete elimination of the initially identified pathogens in 89 cases. no difference in treatment results could be established when applying the dose 2 or 3 times daily. on the third day of treatm ... | 1979 | 112365 |
| [resistance to tetracycline and doxycycline in bavaria (author's transl)]. | the in vitro sensitivity of tetracycline and doxycycline is compared. streptococcus and staphylococcus are more sensitive to doxycycline whereas pseudomonas and proteus spec. are more sensitive to tetracycline. | 1979 | 112366 |
| [microbiological analysis of the results of treatment of urinary tract infections with epicillin]. | | 1979 | 112587 |
| [coliform and fecal streptococcus as indicators of fecal origin of food contamination and poor hygiene]. | | 1978 | 112672 |
| use of model enzymes in the determination of the mode of action of penicillins and delta 3-cephalosporins. | | 1979 | 112913 |
| plasmid-related transmissibility and multiple drug resistance in streptococcus faecalis subsp. zymogenes strain ds16. | streptococcus faecalis subsp. zymogenes strain ds16 was found to harbor two plasmids, designated pad1 (35 megadaltons) and pad2 (15 megadaltons). pad1 is transmissible and determines a hemolysin-bacteriocin, whereas pad2 is non-conjugative and determines resistance to erythromycin, streptomycin, and kanamycin. pad2 could be mobilized by pad1, but usually involved formation of a pad1-pad2 cointegrate. | 1979 | 112916 |
| a comparison of the in vitro activity of tobramycin and gentamicin against 6,042 clinical isolates. | 6,042 strains of staphylococcus aureus, streptococcus faecalis, proteus mirabilis, escherichia coli, klebsiella sp. and pseudomonas sp. were tested against tobramycin and gentamicin. among all species studies, except pseudomonas sp, gentamicin turned out to be slightly superior to tobramycin. | 1979 | 113179 |
| inactivation of metronidazole by aerobic organisms. | | 1979 | 113378 |
| effect of protein synthesis on plasmid maintenance in streptococcus faecalis. | plasmid-to-chromosome ratios in enterobacteriaceae, upon interruption of protein synthesis by chloramphenicol, are either conserved or increased when measured by dye buoyant density centrifugation. we have found, on the other hand, that the effect of inhibition of protein synthesis on the amount of covalently closed circular deoxyribonucleic acid visualized by this method in two strains of streptococcus faecalis appears to differ from these established systems. a three- to sixfold decrease in co ... | 1979 | 113387 |
| species-specific resistance to antimocrobial synergism in streptococcus faecium and streptococcus faecalis. | combinations of penicillin with various aminoglycosidic aminocyclitols were tested against a collection of clinical isolates of streptococcus faecium in vitro and were used to treat endocarditis caused by s. faecium in the rabbit model. s. faecium proved more resistant to penicillin than streptococcus faecalis. even more striking, however, was the resistance to in vitro synergism by combinations of penicillin and various aminoglycosides. at clinically achievable concentrations, penicillin-gentam ... | 1979 | 113469 |
| protein synthesis during recovery of tellurite resistance by heat-injured streptococcus faecalis. | | 1979 | 113484 |
| plasmid transfer in streptococcus faecalis: production of multiple sex pheromones by recipients. | | 1979 | 113798 |
| bacteriological quality of runoff water from pastureland. | runoff from a cow-calf pasture in eastern nebraska was monitored for total coliforms (tc), fecal coliforms (fc), and fecal streptococci (fs) during 1976, 1977, and 1978. bacteriological counts in runoff from both grazed and ungrazed areas generally exceeded recommended water quality standards. the fc group was the best indicator group of the impact of grazing. rainfall runoff from the grazed area contained 5 to 10 times more fc than runoff from the fenced, ungrazed area. there was little differe ... | 1979 | 114112 |
| a transposon (tn917) in streptococcus faecalis that exhibits enhanced transposition during induction of drug resistance. | | 1979 | 114353 |
| presumptive identification of enterococci from other d streptococci by a rapid sodium chloride tolerance test. | ability of enterococci to cause severe disease in humans and their relative resistance to chemotherapeutic agents necessitate their differentiation from other group d streptococci. we developed and evaluated a medium that differentiates enterococci from other group d streptococci within 4 to 24 hours. the 410 clinical isolates used in this study consisted of 328 strains of enterococci and 82 strains of other group d streptococci. the method showed 100 percent sensitivity and specificity with the ... | 1979 | 114744 |
| [antibiotics in the treatment of enterococcal infection]. | | 1979 | 115066 |
| untyped forms of faecal streptococci in egyptian sewage and nile water. | when the thallous-azide agar medium was used a higher incidence of pure faecal streptococci recovery was recorded especially from slightly polluted vehicles such as river water than on the standard m-enterococcus agar medium. in addition, a thallous-azide combination at ph 6.5 was used successfully for the primary isolation of str. faecalis and its two variants. results of biochemical tests of 274 faecal streptococci isolates showed that 20% belonged to str. faecalis and its two variants as wel ... | 1979 | 115174 |
| recurrent infective endocarditis in a drug addict. multiple separate episodes in nine years. | multiple episodes of documented recurrent infective endocarditis occurred in an habitual drug abuser. the six recurrences represent the largest known number reported in a single patient. the case illustrates many characteristics of infective endocarditis and serves to emphasize that recurrent infections are likely if endocarditis risk factors are not eliminated. | 1979 | 115638 |
| influence of neomycin and metronidazole on colonic microflora of volunteers. | the influence on colonic microflora of neomycin and metronidazole alone, or in combination, was studied in volunteers taking a normal diet. bacterial counts on daily faecal samples revealed that metronidazole had no influence on anaerobic faecal bacteria. neomycin on the other hand, was effective against sensitive aerobes. however, the combination of neomycin and metronidazole profoundly reduced both aerobic and bacteria. assay of faecal antibiotic concentrations showed that neomycin achieved hi ... | 1979 | 115830 |
| pulpal response to bacteria in the dog. | twenty-six teeth from 8-month-old beagle dogs were used to evaluate the pulpal response to bacteria in bacterially contaminated minimally exposed and unexposed pulp in the dog. the effects were evaluated by means of serial radiographs, consecutive vital dye injections, and histologic sections. periapical lesions developed in all of the eight teeth which were bacterially infected and exposed. out of ten teeth which were bacterially infected and had cavities without pulp exposure, only two teeth i ... | 1979 | 116180 |