| the soluble c-type cytochromes from the bacterium aquaspirillum itersonii. the complete amino acid sequence of the cytochrome c-550. | a complete amino acid sequence is proposed for the cytochrome c-550 isolated from the gram-negative chemo-organotrophic bacterium aquaspirillum itersonii. the sequence, a single polypeptide chain of 111 residues, was deduced from the sequences of peptides obtained by tryptic, thermolytic or chymotryptic digestion. the cytochrome shows a high degree of sequence homology with the cytochrome c2 from the photosynthetic bacterium rhodospirillum rubrum, and the evolutionary implications of this are co ... | 1987 | 3036517 |
| bacterial surface proteins. some structural, functional and evolutionary aspects. | the structure of several eubacterial and archaebacterial surface (glyco)proteins as determined by three-dimensional electron microscopy is described. particular emphasis is placed on surface proteins which interact with membranes. some structure-function relationships deduced from the structural information, such as shape maintenance and molecular recognition phenomena, are discussed. | 1988 | 3129041 |
| isolation and characterization of azospirillum brasilense loci that correct rhizobium meliloti exob and exoc mutations. | the occurrence in azospirillum brasilense of genes that code for exopolysaccharide (eps) synthesis was investigated through complementation studies of rhizobium meliloti exo- mutants. these mutants are deficient in the synthesis of the major acidic eps of rhizobium species and form empty, non-nitrogen-fixing root nodules on alfalfa (j. a. leigh, e. r. signer, and g. c. walker, proc. natl. acad. sci. usa 82:6231-6235, 1985). we demonstrated that the exoc mutation of r. meliloti could be corrected ... | 1988 | 3182731 |
| asei, a restriction endonuclease from aquaspirillum serpens which recognizes 5'at--taat3'. | | 1988 | 3264065 |
| bacteremia with anaerobiospirillum succiniciproducens. | anaerobiospirillum succiniciproducens is a motile, spiral anaerobic bacterium with bipolar tufts of flagella. reports of clinical illness due to a. succiniciproducens are rare. in a retrospective review of anaerobic isolates referred to the centers for disease control (cdc) from january 1, 1975, through january 31, 1986, isolates of a. succiniciproducens from the blood of 21 patients were identified. a single patient whose blood isolate had not been received at cdc was included in the review. th ... | 1987 | 3326122 |
| determination of the spiral conformation of aquaspirillum spp. by scanning electron microscopy of elongated cells induced by cephalexin treatment. | the effect of the beta-lactam antibiotic cephalexin on the spiral conformation of cells of aquaspirillum spp. was examined by scanning electron microscopy. a. itersonii and a. peregrinum, which are known to have a left-handed spiral shape, elongated and still showed left-handed spirals in medium containing cephalexin. the spiral conformation of the elongated cells is therefore considered to represent the natural condition. the spiral conformations of a. metamorphum and a. psychrophilum grown in ... | 1986 | 3531396 |
| microaerophily and oxygen toxicity. | | 1986 | 3535642 |
| gastric spirillosis in beagles. | light microscopic, ultrastructural, and microbiologic evaluations were performed on stomachs from 30 healthy laboratory-reared beagles. spiral-shaped microorganisms were seen in the gastric glands and parietal cell canaliculi of all the dogs. organisms were most numerous in the cardia and in the region of the fundic-pyloric junction. lymphoreticular hyperplasia, dilatation of parietal cell canaliculi, and degeneration of individual parietal cells (rarely seen) were the only morphologic alteratio ... | 1987 | 3592386 |
| three-dimensional structure of the surface layer protein of aquaspirillum serpens vha determined by electron crystallography. | the three-dimensional structure of the protein which forms the s layer of aquaspirillum serpens strain vha has been determined by electron microscopy. structures have been reconstructed to a resolution of about 1.6 nm for single-layered specimens and about 4 nm for two-layered specimens. the structure, which has hexagonal symmetry, consists of a core in the shape of a cup, with six projections arising from the rim of the cup to join adjacent subunits at the threefold symmetry axes. the model is ... | 1986 | 3745114 |
| experimental infection and abortion of pregnant guinea pigs with a unique spirillum-like bacterium isolated from aborted ovine fetuses. | study was made of the pathogenicity of a spirillum-like, anaerobic, gram-negative bacterium, originally isolated from aborted lambs, for pregnant guinea pigs. reproducible conditions for propagation and preservation of the bacterium were determined as requisite for the preparation of cultures for animal inoculation. a preliminary experiment was done with 10 pregnant guinea pigs to test for an infective dose of organisms that would produce abortion. high-passage cultures (n = 50) were used to ino ... | 1987 | 3826849 |
| "intestinal spirochaetosis" of the vervet monkey. | electron microscopy revealed that 80% of captured vervet monkeys, held in quarantine for experimental use, showed extensive proliferation of spiral-shaped bacteria on the mucosal epithelium of the large bowel. a consortium, consisting of a predominant spirillum together with a spirochaete, was usually seen as a lawn covering the colonic epithelium. sparsely populated areas showed preferential colonization of the tubular glands. pathological changes were minimal, being confined to the microvillus ... | 1985 | 3925404 |
| electron microscopic observations of structures associated with the flagella of spirillum volutans. | electron microscopy of thin-sectioned spirillum volutans (atcc 19554) showed that at the insertion site of the flagellum there was a cylindrical structure with a diameter of ca. 36 nm which extended ca. 19 nm into the cytoplasm. this structure, termed a cytoplasmic flagellar base, enclosed a central rod which was continuous with the hook. there was a continuation of the flagellar base into the peptidoglycan layer, enclosing ringlike structures and the central rod. the flagellar hook and proximal ... | 1985 | 3972771 |
| unusual cellular fatty acids and distinctive ultrastructure in a new spiral bacterium (campylobacter pyloridis) from the human gastric mucosa. | spiral bacteria, named campylobacter pyloridis, were obtained from endoscopic biopsies of the gastric antrum of 14 patients with active chronic gastritis. methyl esters of their cellular fatty acids were prepared by acid-catalysed transmethylation of whole cells. their major fatty acids were tetradecanoic acid (14:0) and cis-9,10-methyleneoctadecanoic acid (19:0 delta), with a very small amount of hexadecanoic acid (16:0). this is markedly different from the fatty acids of other campylobacter sp ... | 1985 | 3981612 |
| intestinal microbial flora after feeding phytohemagglutinin lectins (phaseolus vulgaris) to rats. | incorporation of purified phytohemagglutinin (pha) lectins derived from red kidney beans (phaseolus vulgaris) in the diet of weanling rats will cause growth failure, malabsorption of nutrients, and bacterial overgrowth in the small intestine. these effects are not caused by feeding a similar quantity of pha to germfree rats. to define the morphological and bacterial changes on the mucosal surfaces of the jejunum, ileum, and cecum in greater detail, we pair fed two groups of weanling rats isocalo ... | 1985 | 4026292 |
| microtox and spirillum volutans tests for assessing toxicity of environmental samples. | | 1985 | 4052646 |
| an ultrastructural study of the gastric campylobacter-like organism 'campylobacter pyloridis'. | microaerophilic spiral organisms may be isolated frequently from samples of gastric mucus taken from patients undergoing gastroscopy. the ultrastructure of these gastric campylobacter-like organisms ('campylobacter pyloridis') shows that they have greater affinities with spirillum than with campylobacter. | 1985 | 4067580 |
| antiparasitic mechanisms in parasitic infections. | | 1970 | 4098297 |
| specific staining for electron microscopy of murein sacculi of bacterial cell walls. | | 1970 | 4098764 |
| structural properties and features of parasitic bdellovibrio bacteriovorus. | the structure of five parasitic strains of bdellovibrio bacteriovorus was studied by electron microscope after negative staining and in shadow-case and etched freeze-fractured preparations. special attention was paid to the cell wall and the flagellar sheath which is continuous with the wall or part of it. these structural components reveal distinct features which are induced by certain staining substances; they are exceedingly susceptible to disruption by physical treatments, and in old cells o ... | 1970 | 4099101 |
| studies on the cell wall of spirillum serpens. ii. chemical characterization of the outer structured layer. | | 1973 | 4119519 |
| location and description of spiral-shaped microorganisms in the normal rat cecum. | some indigenous microorganisms have been shown to localize in certain anatomical sites of the digestive tract of mammals. we studied the ceca of normal adult rats by light and electron microscopy to determine whether any specific bacterial population localizes in this area. all rats studied showed that the crypt was packed with organisms whose morphological character differs from those of the cecal lumen. organisms localized in the crypt were often identified topographically close to the microvi ... | 1972 | 4120246 |
| localization of adenosine triphosphatase activity in motile bacteria. | | 1973 | 4128469 |
| growth, structure, and classification of selenomonas. | | 1973 | 4129090 |
| superficial macromolecular arrays on the cell wall of spirillum putridiconchylium. | electron microscopy of the cell envelope of spirillum putridiconchylium, using negatively stained, thin-sectioned, and replicated freeze-etched preparations, showed two superficial wall layers forming a complex macromolecular pattern on the external surface. the outer structured layer was a linear array of particles overlying an inner tetragonal array of larger subunits. they were associated in a very regular fashion, and the complex was bonded to the outer, pitted surface of the lipopolysacchar ... | 1974 | 4137219 |
| [selenomonas in the caecum of rats]. | | 1972 | 4144943 |
| abnormally low activities of fumarate hydratase and malate dehydrogenase in oxygen-sensitive cultures of spirillum volutans. | | 1973 | 4148677 |
| structure and assembly of bacterial surface layers composed of regular arrays of subunits. | | 1974 | 4152594 |
| form and function of the glycocalyx on free cell surfaces. | | 1974 | 4155091 |
| [staining of peptidoglycan with uranyl- and chromium salts]. | | 1969 | 4186900 |
| [specific contrasting of the murein sacculi for electron microscopy]. | | 1969 | 4187477 |
| action of uranyl acetate on the murein of spirllum serpens. | | 1969 | 4188555 |
| [structural alterations of the murein sacculus of spirillum serpens after treatment with uranyl acetate]. | | 1969 | 4189119 |
| [the effect of uranyl acetate on the murein sacculus of spirillum serpens]. | | 1970 | 4192144 |
| extractable lipids of gram-negative marine bacteria: phospholipid composition. | phospholipid compositions of 20 strains of marine and estuarine bacteria were determined. results showed that phospholipids of marine bacteria differed very little from those of nonmarine organisms with phosphatidylethanolamine, phosphatidylglycerol, and diphosphatidylglycerol being the predominant phospholipids in all strains examined. lyso-phosphatidylethanolamine occurred in significant quantities among a number of the marine bacteria, and two of the isolates contained significant quantities ... | 1973 | 4197274 |
| chemotactic responses by motile bacteria. | | 1973 | 4202782 |
| effect of viscosity on bacterial motility. | the behavior of a number of motile flagellated bacteria toward viscosity characteristics of their fluid environments was observed. all showed an increase in velocity (micrometers per second) in more viscous solutions. velocity reached a maximum at a characteristic value, however, and thereafter decreased with higher viscosities. peritrichously flagellated bacteria had maximum velocities at higher viscosities than polarly flagellated bacteria. effects of temperature, and possible utilization of c ... | 1974 | 4204439 |
| [antiviral properties of bacteria and their metabolites]. | | 1973 | 4205967 |
| [submicroscopic structure of the bacterial cell wall (review of the literature)]. | | 1973 | 4206610 |
| penetration of bdellovibrio bacteriovorus into host cells. | electron microscopy reveals that, in bdellovibrio infection, after the formation of a passage pore in the host cell wall, the differentiated parasite penetration pole is associated with the host protoplast. this firm contact persists throughout the parasite penetration and after this process is completed. in penetrated hosts this contact is also apparent by phase microscopy. the association between the walls of the parasite and the host at the passage pore, on the other hand, is transient. bdell ... | 1974 | 4208138 |
| inhibition of inter-microbial predation by chlorinated hydrocarbons. | | 1974 | 4209716 |
| the flexibility of bacterial cell walls. | | 1974 | 4213904 |
| pyrogenic activity of bacterial mucopeptides. | | 1974 | 4279259 |
| endo-n-acetyl-glucosaminidase from clostridium perfringens, lytic for cell wall murein of gram-negative bacteria. | an endo-n-acetyl-glucosaminidase which degrades the murein (peptidoglycan) sacculi of the cell walls of escherichia coli and spirillum serpens, but not those of micrococcus lysodeikticus and sarcina lutea, is present as a contaminant in a "phospholipase c" from clostridium perfringens. the specificity of enzyme action was elucidated by reduction of liberated glycosidic groups with nabh(4) and identification of glucosaminol as the reduction product. this finding contradicts previous reports assoc ... | 1970 | 4315891 |
| homology of ribosomal ribonucleic acid of desulfovibrio species with desulfovibrio vulgaris. | three species of desulfovibrio were found to have a high degree of ribosomal ribonucleic acid homology with desulfovibrio vulgaris. desulfotomaculum nigrificans, which is also a sulfate-reducing anaerobe, had only 38% ribosomal ribonucleic acid homology with d. vulgaris. the homologies of six other unrelated genera were determined and found to be lower than 50%. | 1971 | 4326740 |
| studies on the deoxyribonucleic acid from spirillum. | | 1971 | 4334354 |
| a comparison of respiratory processes in spirillum volutans, spirillum itersonii and spirillum serpens. | | 1971 | 4335582 |
| isolation and characterization of temperature-sensitive mutants of host-dependent bdellovibrio bacteriovorus 109d. | a variety of temperature-sensitive mutants of host-dependent bdellovibrio bacteriovorus 109d were selected after ethyl methane sulfonate mutagenesis. mutants that demonstrated plaque-forming ability reversion frequencies of 10(-8) to 10(-9) were chosen for further study. representatives of these mutants were then characterized by phase-contrast and electron microscopy, temperature-shifted one-step growth experiments, attachment kinetics, and macromolecular capabilities. representative mutants de ... | 1974 | 4360541 |
| ferrochelatase activity in wild-type and mutant strains of spirillum itersonii. solubilization with chaotropic reagents. | | 1974 | 4364772 |
| [electron microscopic observations on parasites of scenedesmus mass cultures. 4. bacteria (author's transl)]. | | 1974 | 4367947 |
| sugar catabolism in aquaspirillum gracile. | aquaspirillum (spirillum) gracile is one of the few spirilla that cause acidification of the medium when cultured with sugars. acidic reactions have been reported only for d-glucose, d-galactose, and l-arabinose, and the mode of attack of these sugars has not been previously investigated. the soluble portion of extracts of glucose-cultured cells of a. gracile atcc 19624 was found by spectrophotometric methods to contain enzyme activities characteristic of the entner-doudoroff and embden-meyerhof ... | 1974 | 4369249 |
| some energy-producing systems in bdellovibrio bacteriovorus, strain 6-5-s. | | 1968 | 4386240 |
| [the cervico-facial actinomycosis, its early diagnosis. importance of the parasitic polymorphism and of the yellow granules]. | | 1968 | 4386894 |
| [studies on s-formed organisms isolated from oral cavity and their flagella (author's transl)]. | | 1974 | 4531459 |
| evidence for a lytic enzyme produced by bdellovibrio bacteriovorus 6-5-s. | | 1972 | 4560485 |
| effects of calcium and magnesium ions and host viability on growth of bdellovibrios. | | 1973 | 4570839 |
| [current status of the study of a new parasitic group of bacteria, bdellovibrio bacteriovorus]. | | 1972 | 4576702 |
| intracellular growth of bdellovibrio bacteriovorus 6-5-s in heat-killed spirillum serpens vhl. | | 1974 | 4599888 |
| ["mixed association" and gram negative anaerobic asporous bacillary constitiuent in mouth pathology]. | | 1974 | 4601952 |
| a three-dimensional atomic model of the murein layer of bacteria. | | 1974 | 4604047 |
| ultrastructural aspects of localized membrane damage in spirillum serpens vhl early in its association with bdellovibrio bacteriovorus 109d. | | 1974 | 4615643 |
| [new infections by bacteria of low pathogenicity. gram negative bacteriemia, sepsis caused by bacillus subtilis and spirillas in chemo- and immunotherapy]. | | 1972 | 4621824 |
| state of the rigid-layer in celll walls of some gram-negative bacteria. | | 1972 | 4625788 |
| antimicrobial effects of cellvibrio on blue-green algae. | | 1972 | 4626336 |
| relationship between bdellovibrio bacteriovorus 6-5-s and autoclaved host bacteria. | | 1972 | 4630968 |
| locomotion of spirilla. | the hydromechanics of spirilla locomotion is analyzed by considering the balance of both rectilinear and angular momenta of the surrounding viscous fluid which is otherwise at rest. the physical model of spirillum adopted for the present analysis consists of a rigid helical body with flagella attached to both ends of the helix. the motion is supposed to be activated first by the polar flagella, both rotating in the same sense, thus causing the helical body to rotate in the opposite sense in angu ... | 1972 | 4642227 |
| bacterial flagella rotate and do not contract. | | 1972 | 4644413 |
| purification and characterization of a lytic peptidase produced by bdellovibrio bacteriovorus 6-5-s. | | 1973 | 4709167 |
| possible enzymatic base of bacteriolysis by bdellovibrios. | | 1973 | 4711453 |
| localization of bacteria in the gastrointestinal tract: a possible explanation of intestinal spirochaetosis. | the large intestine of rats and dogs was examined by light and electron microscopy. in both species localization of bacteria in specific areas of the tissue was observed. fusiform bacteria mixed with spirochaetes were seen at the opening of the crypts into the large bowel. however, at the base of the crypts homogeneous populations of spiral organisms were found; some crypts contained borrelia-type spirochaetes, whereas others contained spiral bacteria with other morphology. very few spiral bacte ... | 1973 | 4716551 |
| estimation with several culture media of spirilla of 11 natural sources. | | 1973 | 4752342 |
| spirillum hepatitis in 'acquired' hypogammaglobulinaemia with thyroiditis, pernicious anaemia and possible dermatitis herpetiformis. | | 1973 | 4777034 |
| transport and catabolism of d-fructose by spirillum itersomii. | spirillum itersonii atcc 12639 utilized d-fructose but neither d-glucose nor d-gluconate as a sole source of carbon and energy. the substrate saturation kinetics for d-fructose and d-glucose uptake by whole cells indicated the presence of a carrier-mediated transport system for d-fructose but not for d-glucose. the d-fructose uptake activity was induced (10- to 12-fold increase) during growth on d-fructose-casamino acids (ca) or d-glucose-ca medium, but not ca alone. d-fructose uptake activity w ... | 1974 | 4808897 |
| [vibrios and spirilla in dogs and cats]. | | 1966 | 4862039 |
| growth characteristics of heterotrophic bacteria in seawater. | | 1968 | 4867754 |
| competitive elimination of enterobacteriaceae from seawater. | | 1968 | 4879218 |
| the nature, intergeneric distribution and biosynthesis of isoprenoid quinones and phenols in gram-negative bacteria. | 1. twenty-two aerobically grown gram-negative bacteria were analysed for demethylmenaquinones, menaquinones, 2-polyprenylphenols, 6-methoxy-2-polyprenylphenols and ubiquinones. 2. all the eight enterobacteria and both the two facultative organisms (aeromonas punctata and aeromonas hydrophila) examined contain all the compounds listed above. the principal homologues are octaprenyl; in addition lower (down to tri- or tetra-prenyl for the 2-polyprenylphenols) and sometimes higher homologues are als ... | 1969 | 4886765 |
| identification of episilon-n-methyllysine in spirillum serpens flagella and of episilon-n-dimethyllysine in salmonella typhimurium flagella. | | 1969 | 4897951 |
| regulation of heme and cytochrome synthesis in spirillum intersonii. | | 1969 | 4900399 |
| isolation and characterization of host-independent bdellovibrios. | a reliable method has been developed for the isolation of host-independent (h-i; i.e., "saprophytic") strains of bdellovibrio from host-dependent (h-d; i.e., "parasitic") cultures. the technique involves growing streptomycin-resistant (sm(r)) h-d cultures on streptomycin-susceptible (sm(8)) host cells. a lysate containing large numbers of the sm(r) h-d cells and some remaining sm(8) host cells is transferred to a selection medium which contains the antibiotic. the sm(8) host cells in the lysate ... | 1969 | 4901359 |
| [natural foci of parasitic diseases of humans in central europe]. | | 1970 | 4914542 |
| [demonstrations from clinical bacteriology]. | | 1970 | 4935367 |
| examination of certain bacterial colonies by scanning electron microscopy. | | 1971 | 4949963 |
| formation of bacterial flagella. i. demonstration of a functional flagellin pool in spirillum serpens and bacillus subtilis. | martinez, r. j. (university of california, los angeles), and e. z. gordee. formation of bacterial flagella. i. demonstration of a functional flagellin pool in spirillum serpens and bacillus subtilis. j. bacteriol. 91:870-875. 1966-exponentially growing cultures of spirillum serpens and bacillus subtilis regained motility and flagella within one generation after mechanical deflagellation. regeneration of flagella occurred in both cultures in the presence of chloramphenicol at concentrations shown ... | 1966 | 4956760 |
| correlation of maximal growth temperature and ribosome heat stability. | | 1967 | 4962250 |
| the formation of bacterial flagella. 3. characterization of the subunits of the flagella of bacillus subtilis and spirillum serpens. | | 1967 | 4963866 |
| studies on the cell wall of spirillum serpens. 1. isolation and partial purification of the outermost cell wall layer. | | 1970 | 4991779 |
| [enteral spirilla in a dog]. | | 1972 | 5032070 |
| synthesis, assembly, and localization of periplasmic cytochrome c. | | 1972 | 5057090 |
| a serological method for the identification of spirilla. | | 1972 | 5062284 |
| base composition of deoxyribonucleic acid from spirillum volutans, s. serpens and s. itersonii. | | 1972 | 5078562 |
| treatment and utilization of wood-hydrolysate wastes. | | 1972 | 5085594 |
| uncoordination and recoordination in spirillum volutans. | | 1972 | 5086110 |
| rat-bite fever. | | 1971 | 5167177 |
| a practical scheme for identification of the most numerous oral gram negative anaerobic rods. | | 1965 | 5226836 |
| morphological studies on selenomonas sputigena with reference to its flagellation. | | 1968 | 5247278 |
| morphological and physiological characteristics of spirillum gracile sp. n. | | 1966 | 5296841 |
| competition of marine psychrophilic bacteria at low temperatures. | | 1971 | 5313512 |
| structure of the proximal ends of bacterial flagella. | | 1965 | 5327655 |
| the cell wall and cell division of gram-negative bacteria. | | 1966 | 5333357 |
| [time of appearance in the oral cavity of the fusospirillary flora]. | | 1966 | 5335391 |