Publications
| Title | Abstract | Year Filter | PMID(sorted ascending) Filter |
|---|
| cardiolipin, a major phospholipid of gram-positive bacteria that is not readily extractable. | extraction of phospholipids from stationary phase grown cells of the gram+ bacteria, bacillus megaterium, bacillus subtilis, bacillus cereus and micrococcus lysodeikticus was found to be incomplete with various commonly used extraction procedures. phosphatidylglycerol and phosphatidylethanolamine were readily extracted but up to 95% of the cardiolipin appeared to be retained within the cell residue. extraction of the cardiolipin could be slightly enhanced by increasing the temperature or the aci ... | 1980 | 6776994 |
| [regulation of the biosynthesis of branched aminoacyl trna synthetases in bacillus cereus t]. | the regulation of the biosynthesis of isoleucyl-, valyl-, and leucyl-trna synthetases was studied with an isoleucine-valine requiring mutant of bacillus cereus t. it was shown that valyl-trna synthetase regulation is under multivalent control involving both valine and isoleucine. the isoleucyl- and leucyl-trna synthetases are repressed by the respective cognate amino acid. when two amino acids were removed from the culture medium, derepression of the two corresponding aminoacyl trna synthetases ... | 1980 | 6778511 |
| separation and characterization of an autolytic endo-beta-glucosaminidase from bacillus cereus. | 1. an autolytic endo-beta-glucosaminidase, capable of cleaving the glycoside linkages of n-unsubstituted glucosamine in the glycan moiety of cell wall peptidoglycan, was purified 470-fold from a salt extract of the 2,000 x g precipitate fraction obtained after sonication of a lysozyme-resistant strain of bacillus cereus. the properties of this enzyme were studied. 2. the purified enzyme preparation was also active towards the glycan chain of fully n-acetylated cell wall peptidoglycan. 3. the end ... | 1980 | 6780345 |
| the occurrence of bacillus cereus in some dried foods including pulses and cereals. | 1980 | 6780506 | |
| synthesis of bacillus cereus spore coat protein. | the major structural protein of bacillus cereus spore coats was synthesized, commencing 1 to 2 h after the end of exponential growth, as a precursor with a mass of ca. 65,000 daltons. about 40% of this precursor, i.e. 26,000 daltons, was converted to spore coat monomers of 13,000 daltons each, perhaps as disulfide-linked dimers. the rate of conversion varied, being initially slow, most rapid at the time of morphogenesis of the coat layers, and then slow again late in sporulation, coincident with ... | 1981 | 6780522 |
| antimicrobial activity of street heroin. | street heroin and injection paraphernalia have been implicated as sources of bacteria causing infections in drug abusers [1]. staphylococcus aureus, pseudomonas aeruginosa, and bacillus cereus are common etiologic agents. in a previous study of the microbiology of street heroin and injection paraphernalia, bacillus species was the predominant isolate [2]. we did not find s. aureus, but one study reported isolates of identical phage type from heroin powder and from an infected patient [3]. to rec ... | 1980 | 6780635 |
| a simple purification scheme yielding crystalline phospholipase c from bacillus cereus. | a very simple and rather unusual purification scheme for phospholipase c from bacillus cereus has been worked out. air is bubbled vigorously through the bacterial culture and the foam collected. liquified foam is centrifuged, dialyzed and heated at 74 degrees c for 5 min. after centrifugation, affinity chromatography is carried out on lipoprotein-sepharose. the enzyme is then thermally denatured by exposure to 85 degrees c for 5 min and the precipitated material well washed and then renatured fr ... | 1980 | 6781184 |
| production of a variant of beta-lactamase ii with selectively decreased cephalosporinase activity by a mutant of bacillus cereus 569/h/9. | 1. mutants of bacillus cereus 569/h/9 have been screened in a search for strains that synthesize variants of beta-lactamase ii. 2. one of these mutants (strain 569/h/9/1) produces a beta-lactamase ii-like enzyme that shows a selective decrease in cephalosporinase activity. 3. beta-lactamase ii from strain 569/h/9/1 has been purified to apparent homogeneity and its kinetic properties have been examined. this enzyme resembles the parent beta-lactamase ii in its relative activity with benzylpenicil ... | 1980 | 6781486 |
| fluorometric determination of tetracyclines in small blood and tissue samples. | a reported fluorometric method to determine tetracycline in biological material was modified to determine low levels of the antibiotics when using only small amounts of starting material. the method is applicable to tissue distribution studies in small experimental animals and also can be used for serial determinations in blood samples of these animals and for biopsy material. the tetracyclines are extracted in the presence of ethylenediaminetetraacetic acid, and the phosphate precipitation step ... | 1981 | 6782190 |
| [clofoctol binding by the bacteria (author's transl)]. | clofoctol is an antibacterial agent which is active only on gram + bacteria. the clofoctol binding on bacteria is fast and the number of molecules bound is about 10(6) to 1,5 10(7) molecules per bacteria. bacteria sensitivity towards clofoctol is the result of their ability to bind with it. gram negative and gram + protoplasts of bacteria bind the clofoctol. binding of clofoctol by b. subtilis is obtained with viable cells and also with thermal inactivated cells. binding of clofoctol by the cell ... | 1980 | 6782374 |
| [differentiation of bacilli isolated from raw and pasteurized milk]. | a study was carried out on the species composition, as well as on the biochemical characteristics of 190 strains of aerobic spore-forming microorganisms of the type bacillus, isolated from fresh and pasteurized milk. the differentiation of bacilli was made following petrova's diagram [4]. it was established that the bacillary strains studied referred to i morphological group--bac. licheniformis 55.9%, bac. subtilis 24.8%, bac. puminis 14.7% and bac. cereus 4.6%. the results of the experiments th ... | 1980 | 6782749 |
| the influence of temperature on the growth inhibitory effect of carbon dioxide on pseudomonas fragi and bacillus cereus. | the growth inhibitory effect of 50 kpa (0.5 atm) co2 was tested for pseudomonas fragi in the temperature range 5-35 degrees c and of 101 kpa (1 atm) co2 on bacillus cereus in the range 18-46 degrees c. the maximum specific growth rate (mumax) of p. fragi in air (ph 6.7) was 0.44 h-1 at 35c, 0.66 h-1 at 30 degrees c, and 0.078 h-1 at 5 degrees c. in 50 kpa of co2 in air the relative inhibition of the growth rate was about 30% at 35 degrees c, 50% at 30 degrees c, and 90% at 5 degrees c. thus, the ... | 1981 | 6783284 |
| bacteriological examination of ice-cream in the netherlands: comparative studies on methods. | 1980 | 6783602 | |
| a simple and rapid computer-assisted technique for the identification of some selected bacillus species using biochemical tests. | 1980 | 6783604 | |
| influence of curvature of response lines in antibiotic agar diffusion assays. | 1981 | 6783664 | |
| [biosynthesis of extracellular phospholipase c (lecithinase) from bacillus cereus depending on the nutrient medium composition and ph]. | the nutrient medium to provide rapid growth of microbial cells of bacillus cereus str. 504, and biosynthesis of extracellular phospholipase c(ec 3.1.4.3) was selected. the nutrient medium contained acidic casein hydrolyzate, yeast extract or enzymatic hydrolyzate of fodder yeast, glucose, nacl, nahco3, and na2hpo4. the activity of secreted phospholipase c reached maximum at ph 6.3--6.6. | 1980 | 6784112 |
| bacterial food-poisoning versus coliforms-faecal streptococci and gamma radiation survival/dose. | all the species tested were sensitive to gamma radiation treatment, even at a dose as low as 0.001 mrad. the spore-former bacillus cereus (pcj 213) proved to be more resistant than the rest of the tested species, while the gram-negative organisms were more susceptible to irradiation treatment. the tolerance among those organisms is depicted by the descending order: proteus vulgaris, irregular vi, escherichia coli i, e. coli iii, and salmonella typhi-murium. yet all the tested faecal streptococci ... | 1981 | 6784377 |
| bacillus cereus food poisoning. | 1981 | 6786231 | |
| emetic food poisoning caused by bacillus cereus. | symptoms of acute food poisoning developed in eight members of a group who ate lunch at a cafeteria. after brief incubation periods, all affected individuals complained of nausea and abdominal cramps. four persons promptly experienced vomiting. none of those affected was found to have fever and all recovered with 48 hours. epidemiologic investigation incriminated macaroni and cheese as a cause of the illness and samples of this food contained large numbers of bacillus cereus. previous outbreaks ... | 1981 | 6786233 |
| biosynthesis of glycerol teichoic acid in bacillus cereus: formation of linkage unit disaccharide on a lipid intermediate. | 1981 | 6786295 | |
| alteration by heat activation of enzymes localized in spore coats of bacillus cereus. | heat activation (70 degrees c for 20 min) resulted in alteration in structural proteins and enzymes found in bacillus cereus spore coats. the three notable changes were increased glycosylation of coat proteins, alteration in polypeptide pattern on sodium dodecyl sulfate - polyacrylamide gels, and an increase in free sh groups of proteins. about three polypeptides leaked out in small quantities from the spore coats during heat activation. the extraction of five spore coat associated enzyme activi ... | 1981 | 6786720 |
| effect of detoxin d on blasticidin s uptake in bacillus cereus. | 1981 | 6786916 | |
| comparison of various properties of low-molecular-weight proteins from dormant spores of several bacillus species. | several properties of the major proteins degraded during germination of spores of bacillus cereus, bacillus megaterium, and bacillus subtilis have been compared. all of the proteins had low molecular weights (6,000 to 13,000) and lacked cysteine, cystine, and tryptophan. the proteins could be subdivided into two groups: group i (b. megaterium a and c proteins, b. cereus a protein, and b. subtilis alpha and beta proteins) and group ii (b. cereus and b. megaterium b proteins and b. subtilis gamma ... | 1981 | 6787019 |
| a note on the occurrence of bacillus cereus and other species of bacillus in indian spices of export quality. | 1981 | 6788744 | |
| xeroderma pigmentosum cells treated with proteases to relax chromatin structure do not exhibit increased unscheduled dna synthesis. | 1981 | 6789199 | |
| [severe intestinal diseases caused by aerobic bacterial spores]. | 1981 | 6791090 | |
| bovine mastitis caused by bacillus cereus. | 1981 | 6791370 | |
| [possible etiologic role of bacillus cereus in acute intestinal diseases of children]. | 1981 | 6791411 | |
| [microbiological preservation effect of chlorhexidine acetate]. | 1981 | 6791462 | |
| the effect of quaternary ammonium compounds and amine oxides on spores of bacillus cereus. | the effect of 1-dodecylpiperidine 1-oxide and n,n'-bis(dodecyldimethyl)-1,2-ethane diammonium dibromide on the spores of bacillus cereus. particularly their binding to intact spores and spores with reduced cystine bonds, was investigated. the langmuir type of binding is involved in both cases. both compounds decreased the thermoresistance of spores. dpno decreased the fraction of non-germinating spores, the effect of the drug increasing with increasing concentration. this phenomenon was associat ... | 1981 | 6792009 |
| effects of glass filtered solar radiation & of 2, 4 dinitrophenol on growth of bacillus cereus & on its survival after far-uv irradiation. | 1981 | 6792061 | |
| microbial production of vitamin b12 antimetabolites. iv. isolation and identification of 4-keto-5-amino-6-hydroxyhexanoic acid. | 4-keto-5-amino-6-hydroxyhexanoic acid was isolated from bacillus cereus 102804 fermentations and found to inhibit the growth of gram-positive and gram-negative bacteria, when grown in a chemically defined medium. the mechanism appeared to be the inhibition of delta-aminolevulinic acid dehydratase. the ki value of 4-keto-5-amino-6-hydroxyhexanoic acid in an enzyme preparation of propionibacterium shermanii was 0.72 microm. similar test conditions with 4-keto-5-aminohexanoic acid resulted in ki of ... | 1981 | 6792174 |
| fulminant postsurgical bacillus cereus meningitis: case report. | a 25-year-old woman presented with decreased level of consciousness, bilateral papilledema, and bitemporal hemianopsia. while receiving oxacillin prophylaxis, she underwent ventriculostomy and a transsphenoidal approach for the removal of a growth hormone- and prolactin-secreting adenoma of the pituitary. within 4 days, fewer, symptoms of meningitis, and marked cerebrospinal fluid (csf) pleocytosis developed, associated with many large gram-positive rods in the csf, subsequently identified as ba ... | 1981 | 6792327 |
| bacillus cereus toxins. | 1981 | 6792636 | |
| effect of some divalent metal cations on phospholipase c from bacillus cereus. | incubation of phospholipase c from bacillus cereus with certain divalent metal cations caused enzyme inactivation with cu(ii) being particularly effective. the inactivation arose from the reversible exchange of zn(ii) in the enzyme with the metal cations. both zinc atoms in the enzyme exchanged rapidly with cu(ii) whereas only one exchanged spontaneously with co(ii). with lecithin substrates, cozn-phospholipase c had a specific activity of 3.6-11.3% of that of znzn-phospholipase c, whereas the c ... | 1981 | 6792844 |
| kinetic and inhibition studies of bacillus cereus beta-lactamase using a spectrophotometric method. | the use of a spectrophotometric method is reported for the characterization of a beta-lactamase (ec 3.5.2.6) from bacillus cereus. absorption coefficients of the mercaptides of various penicillins were determined with this method. the enzyme was kinetically characterized using penicillins. inhibition studies with bacillus cereus beta-lactamase and various penicillins showed a substrate type of inhibition, indicating an additional binding site for substrates without catalytic activity. the dissoc ... | 1981 | 6793687 |
| bovine mastitis caused by bacillus cereus. | 1981 | 6794216 | |
| [experience with the international standardization of the biological activity of the 3d standard for streptomycin]. | the activity of the third international standard of streptomycin was determined to be equal to 755 iu/mg with the use of accurately weighed amounts of streptomycin and 78037 iu with the use of streptomycin ampoules. the standardization center of the who decided to use the whole content of the ampoule of the third international standard of streptomycin, the activity of which is determined to be equal to 78500 iu per an ampoule. | 1981 | 6794439 |
| mechanisms of sorbate inhibition of bacillus cereus t and clostridium botulinum 62a spore germination. | the mechanism by which potassium sorbate inhibits bacillus cereus t and clostridium botulinum 62a spore germination was investigated. spores of b. cereus t were germinated at 35 degrees c in 0.08 m sodium-potassium phosphate buffers (ph 5.7 and 6.7) containing various germinants (l-alanine, l-alpha-nh2-n-butyric acid, and inosine) and potassium sorbate. spores of c. botulinum 62a were germinated in the same buffers but with 10 mm l-lactic acid, 20 mm sodium bicarbonate, l-alanine or l-cysteine, ... | 1981 | 6794451 |
| inhibition of bacillus cereus spore outgrowth by covalent modification of a sulfhydryl group by nitrosothiol and iodoacetate. | nitrosothiols with the general structure rsn==o were studied as a model system of bacteriostatic action toward outgrowing bacterial spores. with a taft plot analysis, the influence of the structure of the r group on the inhibitory effectiveness of a series of nitrosothiols showed that effectiveness as an inhibitor of bacillus cereus t outgrowth correlated with the electron withdrawal of r, but that size, shape, charge, hydrophobicity, and transportability had little influence. this was interpret ... | 1981 | 6795179 |
| [evaluation of the bactericidal activity of chiral alkylammonium salts derived from n-benzoyl-amino acids with escherichia coli and bacillus cereus. i. -- evaluation of the antibacterial activity (author's transl)]. | long-chained alkylammonium salts (c12 and c16) obtained from chiral n-benzoyl-amino acids were tested against escherichia coli and bacillus cereus, to evaluate their antibacterial efficacy. the bactericidal activity (mbc) determined by the membrane filtration technique and the bacteriostatic activity values suggested anionic group participation. the participation of the anion moiety, depended on nature and configuration of the amino acid. stereoselective interactions appeared between bacteria an ... | 1981 | 6795576 |
| [evaluation of the bactericidal activity of chiral alkylammonium salts derived from n-benzoyl-amino acids with escherichia coli and bacillus cereus. ii. -- adsorption mechanism and interpretation (author's transl)]. | by testing the antibacterial activity of new long-chained alkylammonium salts with organic asymmetric anions (n-benzoyl-amino-acids) we have been able to precise the kind of interaction that would take place between the microorganisms and the two groups of the surfactant molecule. evidence for anion participation to the bactericidal activity appeared through kind and configuration of the amino acid. a mechanism is proposed, that takes into account, hydrophobic and ionic interactions with cation ... | 1981 | 6795577 |
| [the importance of aerobic spore-forming bacillaceae in routine demonstration of microorganisms (author's transl)]. | according to our studies the number of spore-forming bacilli at the average amounts to 2 to 15% within the air and food flora. due to their presence in the air they can contaminate test samples. likewise it is to be taken into consideration that they can cause pathological changes in susceptible organisms. in our laboratory we isolated aerobic bacilli from biological material in seven cases whereby pathogenicity was established in five cases thereof. | 1981 | 6795855 |
| bacterial mesosomes: method dependent artifacts. | the occurrence of mesosomes was investigated during septum formation of vegetative and sporulating cells of bacillus cereus. it has been demonstrated that bacterial mesosomes which are considered by numerous microbiologists as an integrated constituent of gram positive bacteria, are in reality artifacts arising during the preparation for electron microscopy. the conventional fixation methods allowed enough time for the cytoplasmic membrane to react to the changed conditions and to form the typic ... | 1981 | 6796029 |
| identification of the apparently essential lysine residues in phospholipase c (bacillus cereus). | phospholipase c (bacillus cereus) contains two apparently essential and very reactive lysine residues that may be labelled selectively by pyridoxal 5'-phosphate [aurebekk & little (1977) biochem, j. 161, 159--165]. one of these lysine residues was found in the 25-amino acid n-terminal fragment liberated by cnbr digestion of the pyridoxal-labelled enzyme and identified as lysine-6. two of the labelled peptides isolated from the chymotryptic digest of pyridoxal-labelled enzyme contained proline, s ... | 1981 | 6796052 |
| salt extends the upper temperature limit for growth of food-poisoning bacteria. | inclusion of nacl into the growth medium raised the upper temperature limit of growth of the following organisms: staphylococcus aureus (two strains), salmonella senftenberg, s. typhimurium, escherichia coli, streptococcus faecalis, bacillus cereus, clostridium sporogenes, c. perfringens (two strains). the magnitude of the response varied with the culture, the largest being 3.5 degrees with b. cereus cells. the spores of b. cereus were not protected by salt but clostridial spores behaved as the ... | 1981 | 6796247 |
| bioluminescent assay for lipase, phospholipase a2, and phospholipase c. | 1981 | 6796804 | |
| [effect of starch and egg products on the development of bacillus cereus in milk]. | 1981 | 6797030 | |
| [sensitivity of bacterial isolated from non-parenteral drugs to antibiotics. i. isolation and identification of microorganisms]. | 1981 | 6797258 | |
| [sensitivity of bacteria isolated from non-parenteral drugs to antibiotics. ii. sensitivity of gram-positive strains]. | 1981 | 6797259 | |
| bacterial spore components which enhance the bacteriostatic effectiveness of s-nitrosothiol. | spore components exuded into the medium during outgrowth of bacillus cereus t enhanced the bacteriostatic effectiveness of s-nitrosomercaptoethanol, an inhibitor which prevents outgrowth at low concentrations and germination at higher concentrations. the enhancement effect was slight with respect to outgrowth, but dramatic with respect to germination, in that the inhibitory effectiveness of nitrosothiols toward germination inhibition was enhanced by as much as 33-fold when nitrosothiols was in t ... | 1981 | 6797352 |
| the problem of bacillus species infection with special emphasis on the virulence of bacillus cereus. | although bacillus cereus is an uncommon ocular pathogen, infection with it usually results in loss of the eye. although previous reports have emphasized endogenous infection, our recent experience indicates the importance of b cereus infection following trauma. management is hampered by ineffectiveness of current empirical antibiotic regimens. this microorganism is resistant to both the penicillins and the cephalosporins. although b cereus is susceptible to gentamicin, our studies indicate that ... | 1981 | 6798519 |
| [bacillus cereus: epidemiology, pathogenicity and pathogenesis. bibliographic review]. | 1981 | 6798643 | |
| microbiology of frozen goat meat and toxin production by bacillus cereus isolated therefrom. | microbial analysis of commercial samples of freshly frozen goat meat and those stored at - 12 degrees c for one week revealed high counts of aerobic bacteria, bacillus cereus, staphylococcus aureus and streptococci. these counts increased with storage. psychrophilic bacteria were higher in number than mesophiles. the counts of salmonella were zero cfu/g in both freshly frozen and stock frozen meat. no yeast or moulds were encountered. mouse tests of crude culture filtrate of b. cereus and prepar ... | 1981 | 6798783 |
| [bacillus cereus infections. a propos of 3 personal cases]. | 1981 | 6798804 | |
| a new test of differentiation of bacillus cereus and bacillus anthracis based on the existence of spore appendages. | 1981 | 6799753 | |
| [constructive and energy metabolism changes in the formation and germination of resting retractile forms of bacillus cereus]. | it has been found that, as soon as bacillus cereus vegetative cells yield resting refractile forms under the action of specific autoregulating factors, the incorporation of labeled precursors of the main cellular biopolymers and lipids stops almost entirely and the level of cell endogenous respiration abruptly decreases. when the refractile forms revert to the vegetative state and growth, the processes of biosynthesis and respiration are restored. the level of metabolism typical of vegetative ce ... | 1981 | 6799756 |
| isolation of a covalent intermediate in beta -lactamase i catalysis. | 1982 | 6800840 | |
| interaction between a bacillus cereus spore hexosaminidase and specific germinants. | a purified coat-associated hexosaminidase from spores of bacillus cereus was studied to determine whether it could promote germination of dormant spores. spores of a coat-deficient mutant as well as chemically extracted spores were used as substrate. both of these spore preparations responded poorly to most germinants. however, absorbance loss was accelerated when the hexosaminidase was added in the presence of l-alanine. enzyme alone was not effective. the addition of d-alanine inhibited comple ... | 1982 | 6801016 |
| bacillus cereus meningo-encephalitis in a pre-term baby. | 1981 | 6801918 | |
| fulminating panophthalmitis due to exogenous infection with bacillus cereus: report of 4 cases. | bacillus cereus is a seldom recognised but important cause of panophthalmitis. although most reported cases have been the result of endogenous infection, we have recently seen 4 cases that followed ocular trauma. in each instance a fulminating panophthalmitis developed, accompanied by fever and leucocytosis. despite prompt therapy all eyes were rapidly lost. in view of the selective antibiotic sensitivities of this organism and the fulminating course of the disease, conventional approaches to th ... | 1982 | 6802173 |
| the inhibition of vegetative cell outgrowth and division from spores of bacillus cereus t by hen egg albumen. | 1982 | 6802792 | |
| photometric immersion refractometry of bacterial spores. | photometric immersion refractometry was used to determine the average apparent refractive index (n) of five types of dormant bacillus spores representing a 600-fold range in moist-heat resistance determined as a d100 value. the n of a spore type increased as the molecular size of various immersion solutes decreased. for comparison of the spore types, the n of the entire spore and of the isolated integument was determined by use of bovine serum albumin, which is excluded from permeating into them ... | 1982 | 6802796 |
| bacterial spore heat resistance correlated with water content, wet density, and protoplast/sporoplast volume ratio. | five types of dormant bacillus spores, between and within species, were selected representing a 600-fold range in moist-heat resistance determined as a d100 value. the wet and dry density and the solids and water content of the entire spore and isolated integument of each type were determined directly from gram masses of material, with correction for interstitial water. the ratio between the volume occupied by the protoplast (the structures bounded by the inner pericytoplasm membrane) and the vo ... | 1982 | 6802802 |
| membrane-bound penicillinases in gram-positive bacteria. | the penicillinases of bacillus licheniformis, bacillus cereus, and staphylococcus aureus are related in structure and cellular localization to one another more closely than they are to penicillinases from gram-negative organisms. in the latter, penicillinases are almost exclusively found in the periplasm, while the gram-positive bacteria retain a substantial proportion as hydrophobic membrane-bound forms. we recently showed (nielsen, j. b. k., caulfield, m. p., and lampen, j. o. (1981) proc. nat ... | 1982 | 6802832 |
| evaluation of a microfluorometer in immunofluorescence assays of individual spores of bacillus anthracis and bacillus cereus. | a microfluorometer was constructed by modifying a standard fluorescent microscope with a fibre optic eyepiece and a simple photometric system. it was evaluated in direct immunofluorescence assays of bacillus anthracis and bacillus cereus spores immobilised on multispot microscope slides. from measurements of stable fluorescent crystals comparable in size to the spores, it was inferred that the fluorescence intensity of a stained bacterium could be measured with good precision. fluctuation of a e ... | 1982 | 6802901 |
| [formation of resting refractile cells in bacillus cereus as affected by an autoregulatory factor]. | extracellular membrane-active compounds were shown to induce the transition of vegetative cells in the producing culture into resting refractile forms. the forms are characterized by the absence of energy, biosynthetic and destructive processes, by the capability to remain viable for a long time, and by a peculiar ultrafine organization. the physiological state and the ultrafine organization of b. cereus cells were found to change under the action of the autoregulatory factor introduced in the c ... | 1982 | 6803113 |
| bacillus cereus panophthalmitis: source of the organism. | serious infections with the "nonpathogenic" bacillus species are increasingly being recognized, especially in drug abusers. cases of panophthalmitis secondary to infection with bacillus cereus, with and without associated bacteremia, have been reported. three drug abusers with panophthalmitis seen in our hospitals during a three-year period are described, and the similar cases reported in the literature are reviewed. the syndrome is characterized by an acute onset with a rapid fulminating course ... | 1982 | 6803328 |
| bacillus cereus endocarditis involving a prosthetic valve. | a rare case of "late onset' endocarditis due to bacillus cereus occurred in a 55-year-old man who had a carpentier-edwards heterograft valve. combination therapy with gentamicin and clindamycin was administered as suggested by testing of minimal bactericidal concentrations for these antibiotics. valve replacement was necessary because of a paravalvular leak. there was no recurrence after six weeks of therapy. | 1982 | 6803367 |
| [proteolytic activity of conditionally pathogenic microorganisms causing food poisoning]. | a study was made of proteolytic activity of the microorganisms proteus and bac. cereus, as well as of infected extract from raw meat. subject to study were also the effects of the temperature, storage and microbial association on the production of exoproteases. the results indicate an increase in the proteolytic activity in the course of storage at room and decreased temperatures and a lowering of the soluble protein amount in the samples, which attests to an active process of spoiling. associat ... | 1982 | 6803437 |
| specific chemical modification of the readily nitrated tyrosine of the rtem beta-lactamase and of bacillus cereus beta-lactamase i. the role of the tyrosine in beta-lactamase catalysis. | the function of the hydroxyl group of the tyrosine residue readily nitrated by tetranitromethane (tyrosine-105) in the rtem plasmid-derived beta-lactamase (penicillinase; penicillin amido beta-lactam-hydrolase, ec 3.5.1.6) from e. coli and in bacillus cereus beta-lactamase i has been investigated by chemical modification methods. in the case of b. cereus beta-lactamase i the nitrated tyrosine can be acetylated by acetic anhydride without effect on beta-lactamase activity the nitrated tyrosine of ... | 1982 | 6803835 |
| molecular analysis of the phospholipids of escherichia coli k12. | phospholipids from escherichia coli k12 were converted to 1,2-diacylglycerols with phospholipase c from bacillus cereus. high-pressure liquid chromatography of 1,2-diacylglycerol p-methoxybenzoates on lichrosorb rp-18 using 2-propanol/acetonitrile (35:65) as eluant permitted separation of 14 molecular species. the main combinations of fatty acids were 1-16:0-2-16:1, 1-16:0-2-cyclo-17:0 and 1-16:0-2-18:1. positional isomers were not present. the 1,2-di-16:0 compound was present at a significant l ... | 1982 | 6803841 |
| mode of antibiotic action of 4-hydroxy-3-nitrosobenzaldehyde from streptomyces viridans. | the free ligand, deferroviridomycin a, and its iron(ii) complex, viridomycin a, were detected in culture supernatant fluids of streptomyces viridans 1671 and were structurally characterized as 4-hydroxy-3-nitrosobenzaldehyde and tris(4-hydroxy-3-nitrosobenzaldehydato-n3,o4)ferrate(ii), respectively. we investigated the antibiotic activity of the above compounds and of the chemically synthesized bis copper(ii), tris cobalt(iii), and tris nickel(ii) complexes against escherichia coli nihj, salmone ... | 1981 | 6805420 |
| regulation of plasminogen activator secretion in mouse peritoneal macrophages. ii. inhibition by immunomodulators of bacterial origin. | two classes of immunomodulators of bacterial origin, peptidoglycan derivatives and lipopolysaccharides, are able to block in vitro the production of plasminogen activator by elicited macrophages: the release of the enzyme into the medium is inhibited and the intracellular activity reduced. in the case of peptidoglycan derivatives, high molecular weight compounds like wsa (water-soluble adjuvant) are stronger inhibitors than small molecules like mpp (muramyl pentapeptide). mdp (muramyl dipeptide) ... | 1982 | 6806202 |
| do intermolecular association phenomena occur in b. cereus beta-lactamase i? | although at fixed enzyme concentration the hydrolysis of cephaloridine by b. cereus beta-lactamase i followed apparently classical michaelis-menten steady-state kinetics, the values of kcat and of km depended linearly, in the absence of added non-enzymatic proteins, on the absolute enzyme concentration. in the presence of gelatin, this dependence was abolished; under these conditions, however, the pseudo-first order kinetic rate constants of inactivation by zn2+ ions exhibited a direct dependenc ... | 1982 | 6806209 |
| [resistance of resting cyst-like forms of bacillus cereus to exposure to high temperature, ultraviolet rays and low-molecular alcohols]. | the dormancy cyst-like forms of bacillus cereus obtained under the action of an autoregulatory factor were shown to be more resistant to the action of such external factors of the medium as high temperatures, ultraviolet irradiation and low molecular weight alcohols comparing to the vegetative cells. incubation at 80 degrees c for 15 min killed 98,5% vegetative cells and 86,5% of the dormancy refractile forms. u. v.--radiation treatment resulted in a loss of viability in 97% of the vegetative ce ... | 1982 | 6806579 |
| concentration of chlortetracycline in the blood of yellow-crowned amazon parrots fed medicated pelleted feeds. | 1982 | 6807277 | |
| [measurement of the presence of bacillus cereus in a dehydrated infant food]. | 1981 | 6808631 | |
| synthesis of the diastereoisomers of 1,2-dipalmitoyl-sn-glycero-3-thiophosphorylethanolamine and their stereospecific hydrolysis by phospholipases a2 and c. | a convenient three-step synthesis of the phosphorothioate analogue of phosphatidylethanolamine is described. the reaction pathway involves the conversion of a 1,2-diacyl-sn-glycerol to its corresponding thiophosphoric acid dichloride by using pscl3 in the presence of a tertiary base. treatment of the dichloride with ethanolamine results in the formation of a cyclic thiophosphoramidate which, upon acidification, undergoes p--n cleavage, giving rise to 1,2-diacyl-sn-glycero-3-thiophosphorylethanol ... | 1982 | 6809047 |
| [epidemiological situation of human carbuncle in upper volta (author's transl)]. | after the statistical statement concerning human carbuncle in upper volta in 1976, 1977 and 1978, the authors report their clinical and epidemiological ascertainments observed during the opportunity of four surveys. among the cutaneous forms, cephalic localization is the most frequently observed. visceral forms are essentially digestive, sometimes respiratory, never neurological. in its voltaic foci (grounds made of clayey alluvium, regulatory flooded), carbuncle stretches to endemic-sporadic fo ... | 1982 | 6809350 |
| [the enzymatic analysis of sphingomyelin in hdl (author's transl)]. | a simple method is described for the enzymatic determination of sphingomyelin in the apolipoprotein b-free supernatants prepared by precipitation of blood sera with phosphotungstate/mgcl2. the analysis is based on the enzymatic hydrolysis of sphingomyelin, by sphingomyelinase from b. cereus, into phosphorylcholine and n-acylsphingosine, and subsequent hydrolysis of phosphorylcholine by alkaline phosphatase. the choline formed is determined by choline kinase in an optical test. the results from t ... | 1982 | 6809883 |
| structural changes induced by subinhibitory concentrations of fosfomycin on staphylococcus aureus and bacillus cereus. | exposure of staphylococcus aureus atcc 6538 and bacillus cereus atcc 11778 to 1/2 mic fosfomycin for 3 and 6 h was studied by transmission and scanning electron microscopy. after 3 h, a loss of density and irregularity of shape in the septum was noted, while after 6 h a delayed separation of newly formed cells was observed in both species. in staphylococcus aureus this resulted in the formation of chains of intact cells and cells in lysis. in bacillus cereus, it produced filamentous forms with m ... | 1982 | 6810067 |
| inhibition of bacillus cereus phospholipase c by univalent anions. | the rate of phospholipid hydrolysis in erythrocyte ghosts by bacillus cereus phospholipase c was markedly decreased by the presence of nacl at concentrations between 25 and 200 mm. the inhibition seemed to be due to cl- and was unaffected by the type of cation present. the larger univalent anions such as hco3-, br-, cl-, no3-, cno- and i- seemed most effective, whereas the bivalent anion so42- was relatively ineffective at 0.1 m, as were acetate and formate. tris buffers at 0.1 m caused marked i ... | 1982 | 6810875 |
| abnormally high tolerance against proteolysis of an exo-oligo-1,6-glucosidase from a thermophile bacillus thermoglucosidius kp 1006, compared with its mesophilic counterpart from bacillus cereus atcc 7064. | 1982 | 6810935 | |
| preparation of 15n-labeled l-alanine by coupling the alanine dehydrogenase and alcohol dehydrogenase reactions. | 1982 | 6811316 | |
| synthesis and biological activity of some new 3,6-dinitro-1:8-naphthaloyl- and 3,6-diamino-1:8-naphthaloylamino acids and dipeptide derivatives. | synthesis of a series of 3,6-dinitro-1:8-naphthaloylamino acids (ii-ix) and some of their corresponding methyl esters (x-xvi) and 3,6-diamino-1:8-naphthaloylamino acid derivatives (xxix-xxxvi) is described. coupling of 3,6-dinitro-1:8-naphthaloylamino acids with amino acid methyl ester hydrochlorides in dioxane-dmf-et3n medium using dcc method furnishes the desired 3,6-dinitro-1:8-naphthaloyldipeptide methyl esters (xvii-xxviii). most of the synthesized 3,6-dinitro-1:8-naphthaloylamino acids, es ... | 1982 | 6811471 |
| microbial contamination of enteral feeds. | 1982 | 6811510 | |
| glyceride-cysteine lipoproteins and secretion by gram-positive bacteria. | the membrane penicillinases of bacillus licheniformis and bacillus cereus are lipoproteins with n-terminal glyceride thioether modification identical to that of the escherichia coli outer membrane lipoprotein. they are readily labeled with [3h]palmitate present during exponential growth. at the same time, a few other proteins in each organism become labeled and can be detected by fluorography after sodium dodecyl sulfate-polyacrylamide gel electrophoresis of total membrane proteins. we distingui ... | 1982 | 6811555 |
| bacterial food poisoning: what to do if prevention fails. | the numerous etiologies of food poisoning make assessment of this disease a cultural, bacteriologic, chemical, gastronomic, and epidemiologic research project. cautious investigation and study of etiologic possibilities are most stimulating intellectual exercises and obviously benefit the patient. often, a case of food poisoning necessitates interaction with the local health department in search of the causative agent before other people are afflicted. a thorough knowledge of this field is essen ... | 1982 | 6812033 |
| kinetic model for surface-active enzymes based on the langmuir adsorption isotherm: phospholipase c (bacillus cereus) activity toward dimyristoyl phosphatidylcholine/detergent micelles. | a simple kinetic model for the enzymatic activity of surface-active proteins against mixed micelles has been developed. this model uses the langmuir adsorption isotherm, the classic equation for the binding of gas molecules to metal surfaces, to characterize enzyme adsorption to micelles. the number of available enzyme binding sites is equated with the number of substrate and inhibitor molecules attached to micelles; enzyme molecules are attracted to the micelle due to the affinity of the enzyme ... | 1982 | 6812057 |
| [the effect of n, n'-bias (dodecyldimethyl)-1,2-ethanediammoniumdibromide on the bacterial cell]. | 1982 | 6812968 | |
| new method for differentiating members of the bacillus cereus group: collaborative study. | a collaborative study was conducted of a new method for differentiating members of the bacillus cereus group. using the new method, each of 14 collaborators identified 8 bacillus cultures, which represented 3 biotypes of the b. cereus group. each culture was tested for motility, hemolytic activity on trypticase-soy-sheep blood agar, and rhizoid growth on nutrient agar; carbol-fuchsin stain was used to determine the presence of protein toxin crystals. cultures were identified as b. cereus (biotyp ... | 1982 | 6813307 |
| anthrax-specific "ap 50-like" phages isolated from bacillus cereus strains. | phages exerting a specific action on bacillus anthracis were isolated from mitomycin c-induced concentrated lysates of 5 bacillus cereus strains producing megacin a (phospholipase a). in electron micrographs the phages closely resembled the anthrax-specific, lipid containing phage ap 50 isolated earlier from soil sample. the phages were similar to ap 50 also in their antigenic and chemical structure, host range and sensitivity to organic solvents, detergents and caesium chloride. the dna charact ... | 1982 | 6814198 |
| [synthesis and properties of the n-ethyl derivatives of carminomycin and rubomycin]. | n-monoethyl derivatives of carminomycin, rubomycin, 13-dihydrocarminomycin and 13-dihydrorubomycin were synthesized by condensation of their amino groups with acetic aldehyde in the presence of sodium boron hydride. the respective n,n-diethyl derivatives of the antibiotics were formed as by-products of the reaction. new compounds such as n-ethylcarminomycin, n,n-diethylcarminomycin, n-ethyl-13-dihydrocarminomycin, n,n-diethyl-13-dihydrocarminomycin, n-ethylrubomycin and n-ethyl-13-dihydrorubomyc ... | 1982 | 6814352 |
| preliminary characterization of adenosine deaminase from bacillus cereus. | adenosine deaminase from bacillus cereus is quite unstable, similarly to other bacterial deaminases, but it shows a peculiar stabilizing effect by some monovalent cations. these include k+, li+, nh4+ and to a lesser extent cs+. maximal stabilization of the deaminase is exerted by k+ at concentrations higher than 20 mm. the enzyme can be rapidly inactivated by sulphydryl reagents such as p-hydroxymercuribenzoate. since adenosine deaminase from b. cereus, in addition to monovalent cations, is stab ... | 1982 | 6814469 |
| [bacillus cereus strain 147: producer of tetramethylpyrazine]. | 1982 | 6815634 | |
| [method for determining the optimum concentration of a disinfectant for its clinical use]. | 1982 | 6815725 | |
| [study of 7 disinfectants on different substrates]. | 1981 | 6815775 | |
| bacillus cereus septicemia in a drug addict: case report. | 1982 | 6817225 | |
| an outbreak of bacillus cereus food poisoning. | 1982 | 6817420 |