| characterisation of a type iv pilus produced by aeromonas caviae. | a pilus produced by a clinical isolate of aeromonas caviae (strain ca195) was purified and partially characterised. the mr of the pilin was estimated to be 23 kda by sds-page. its n-terminal amino-acid sequence showed that it was closely related to 'bundle-forming' type iv pili purified from other aeromonas spp. associated with gastro-enteritis and considered to be important intestinal colonisation factors. bundle-forming pili, often with a polar location, were seen on the surface of strain ca19 ... | 1998 | 9879972 |
| co-expression of polyhydroxyalkanoate synthase and (r)-enoyl-coa hydratase genes of aeromonas caviae establishes copolyester biosynthesis pathway in escherichia coli. | polyhydroxyalkanoate biosynthesis genes of aeromonas caviae were expressed in escherichia coli ls5218 (fadr atoc(con)), and the polyhydroxyalkanoate-producing ability of the recombinants was investigated. a ls5218 strain harboring only phacac (polyhydroxyalkanoate synthase gene) did not accumulate any polyhydroxyalkanoate from dodecanoate in spite of the existence of translated polyhydroxyalkanoate synthase protein, whereas co-expression phacac and phajac ((r)-specific enoyl-coa hydratase gene) ... | 1999 | 9919653 |
| purification and characterization of an aeromonas caviae metalloprotease that is related to the vibrio cholerae hemagglutinin/protease. | a zinc metalloprotease (ap34) from aeromonas caviae was purified by ammonium sulfate precipitation and subsequent gel filtration through sephadex g-100 and sephadex g-50 superfine. the molecular mass was estimated by sodium dodecyl sulfate-polyacrylamide gel electrophoresis to be 34 kda. the protease showed maximum activity at ph 7.0 and was stable at 60 degrees c. ap34 was completely inactivated by edta and zincov. the n-terminal amino acid sequence of ap34 showed a high degree of homology with ... | 1999 | 9919673 |
| enumeration and confirmation of aeromonas hydrophila, aeromonas caviae, and aeromonas sobria isolated from raw milk and other milk products in northern greece. | a total of 138 raw cow's and 57 raw ewe's milk samples; 80 pasteurized cow's milk samples; 39 anthotyros cheese, 36 manouri cheese, and 23 feta cheese samples; and 15 rice pudding samples were examined for the presence and any countable population of aeromonas species. twenty-two (15.9%) of the 138 cow's milk samples analyzed were contaminated with a. hydrophila. in 13 of these samples, populations of 3.0x10(2) to 5.0x10(3) cfu/ml were counted in starch ampicillin agar (saa). eighteen cow's milk ... | 1999 | 10340665 |
| intramolecular chaperone and inhibitor activities of a propeptide from a bacterial zinc aminopeptidase. | an aminopeptidase from aeromonas caviae t-64 was translated as a preproprotein consisting of three domains; a signal peptide (19 amino acid residues), an n-terminal propeptide (101 residues) and a mature region (273 residues). we demonstrated that a proteinase, which was isolated from the culture filtrate of a. caviae t-64, activated the recombinant pro-aminopeptidase by removal of the majority of the propeptide. using l-leu-p-nitroanilide as a substrate, the processed aminopeptidase showed a la ... | 1999 | 10377241 |
| co-expression of 3-ketoacyl-acp reductase and polyhydroxyalkanoate synthase genes induces pha production in escherichia coli hb101 strain. | the escherichia coli 3-ketoacyl-acp reductase gene (fabgec) was cloned using a pcr technique to investigate the metabolic link between fatty acid metabolism and polyhydroxyalkanoate (pha) production. three plasmids respectively harboring fabgec and the poly-3-hydroxyalkanoate synthesis genes phacac and phac1ps from aeromonas caviae and pseudomonas sp. 61-3 respectively were constructed and introduced into e. coli hb101 strain. on a two-stage cultivation using dodecanoate as the sole carbon sourc ... | 1999 | 10418145 |
| molecular cloning and expression in escherichia coli of the extracellular endoprotease of aeromonas caviae t-64, a pro-aminopeptidase processing enzyme(1). | pa protease (pro-aminopeptidase processing protease) activates the pro-aminopeptidases from aeromonas caviae t-64 and vibrio proteolytica by removal of their pro-regions. cloning and sequencing of the pa protease gene revealed that pa protease was translated as a preproprotein consisting of four domains: a signal peptide; an n-terminal propeptide; a mature region; and a c-terminal propeptide. the deduced amino acid sequence of the pa protease precursor showed significant homology with several ba ... | 1999 | 10446382 |
| behavior of listeria monocytogenes and aeromonas spp. on fresh-cut produce packaged under equilibrium-modified atmosphere. | storage experiments were conducted to follow the behavior of pathogens on fresh-cut vegetables (trimmed brussels sprouts, grated carrots, shredded iceberg lettuce, and shredded chicory endives) packaged under an equilibrium-modified atmosphere (ema) (2 to 3% o2, 2 to 3% co2, and 94 to 96% n2) and stored at 7 degrees c. as a comparison, fresh-cut vegetables were also packaged in a perforated high-barrier film (air conditions) and stored at 7 degrees c. in a first step, the shelf life of the veget ... | 1999 | 10528715 |
| aeromonas-associated diarrhoea in bangladeshi children: clinical and epidemiological characteristics. | we studied the clinical and epidemiological features associated with aeromonas diarrhoea by a hospital survey of 7,398 children under 5 years of age presenting with diarrhoea. the data were actually based upon two cohorts from this survey, the majority of the data being identified from 405 (5.5%) in whom aeromonas was the sole enteric pathogen. aeromonas caviae was the most prevalent species, accounting for 32% (129/405) of all isolates. eighty-three per cent of children with aeromonas-associate ... | 1999 | 10605516 |
| detection, prevalence, purification and characterization of lecithinase of klebsiella pneumoniae. | lecithinase activity in klebsiella is a rare trait as out of 208 strains of klebsiella belonging to 3 species, viz. k. pneumoniae (168), k. planticola (29) and k. oxytoca (11), only 4 strains of k. pneumoniae produced lecithinase positive colonies on egg-yolk-agar. although cell lysates of 16 k. pneumoniae yielded positive results for lecithinase assay on egg-yolk-agar, 19 strains were detected positive for lecithinase with elisa using anti-lecithinase serum. release of up to 52.12% cell-bound l ... | 1999 | 10687289 |
| biosynthesis of polyhydroxyalkanoates (pha) by recombinant ralstonia eutropha and effects of pha synthase activity on in vivo pha biosynthesis. | recombinant strains of ralstonia eutropha phb 4, which harbored aeromonas caviae polyhydroxyalkanoates (pha) biosynthesis genes under the control of a promoter for r. eutropha phb operon, were examined for pha production from various alkanoic acids. the recombinants produced poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) [p(3hb-co-3hhx)] from hexanoate and octanoate, and poly(3-hydroxybutyrate-co-3-hydroxyvalerate-co-3-hydroxypentano ate) [p(3hb-co-3hv-co-3hhp)] from pentanoate and nonanoate. one ... | 1999 | 10416652 |
| purification and some properties of high-molecular-weight xylanases, the xylanases 4 and 5 of aeromonas caviae w-61. | aeromonas caviae w-61 produces multiple extracellular xylanases, the xylanases 1, 2, 3, 4, and 5 [nguyen, v. d. et al., biosci. biotechnol. biochem., 56, 1708-1712 (1993)]. here we purified and characterized high-molecular-weight xylanases, the xylanases 4 and 5 from the culture fluids of the bacterium. the purified xylanases 4 and 5, which had molecular masses of 120 and 140 kda, respectively, were endo-beta-1,4-xylanases with similar enzymatic properties except for trans-xylosidase activity. t ... | 2000 | 10737201 |
| site-directed mutagenesis of asp313, glu315, and asp391 residues in chitinase of aeromonas caviae. | site-directed mutagenesis was used to explore the roles of amino acid residues involved in the activity of chitinase from aeromonas caviae. kinetic parameters for 4-methylumbelliferyl-n,n'-diacetyl-chitobiose or 4-methylumbelliferyl-n,n',n"-triacetylchitotriose hydrolysis were determined with wild-type and mutant chitinases. chitinases with the mutations e315d (or q) and d391e (or n) were severely impaired and had dramatically decreased kcat. however, the effect of the these mutations on the km ... | 1999 | 10794597 |
| survey for psychrotrophic bacterial pathogens in minimally processed lettuce. | a total of 120 minimally processed, cut and packaged lettuce samples were purchased from retail supermarkets or provided by a salad production facility over an 8-month period. the samples were tested for total aerobic plate counts and for the presence of potentially pathogenic species belonging to the genera of listeria, aeromonas and yersinia. the aerobic plate counts ranged from 103 to 109 colony forming units (cfu) g-1. most samples (76%) contained between 105 and 107 cfu g-1 total aerobic ba ... | 2000 | 10849276 |
| cloning, sequencing and expression of the gene encoding the extracellular metalloprotease of aeromonas caviae. | a gene (apk) encoding the extracellular protease of aeromonas caviae ae6 has been cloned and sequenced. for cloning the gene, the dna genomic library was screened using skim milk lb agar. one clone harboring plasmid pkk3 was selected for sequencing. nucleotide sequencing of the 3.5 kb region of pkk3 revealed a single open reading frame (orf) of 1,785 bp encoding 595 amino acids. the deduced polypeptide contained a putative 16-amino acid signal peptide followed by a large propeptide. the n-termin ... | 2000 | 10888351 |
| antimicrobial resistance of mesophilic aeromonas spp. isolated from two european rivers. | the activity of 19 antibiotics and four antiseptics and/or disinfectants was studied against 138 non-redundant strains of aeromonas spp. (104 aeromonas caviae, 22 aeromonas sobria and 12 aeromonas hydrophila) isolated from two european rivers. antibiotic resistance frequencies were: nalidixic acid, 59%; tetracycline, 14%; fosfomycin, 8%; tobramycin and cotrimoxazole, 7%; cefotaxime, 4%; chloramphenicol, 2%; gentamicin, 1%. most of the nalidixic acid-resistant strains were susceptible to fluoroqu ... | 2000 | 10933657 |
| inhibition of aeromonas caviae and a. sobria by sodium choloride, citric acid, ascorbic acid, potassium sorbate and extracts of thymus vulgaris. | the respective and combined effects of sodium chloride, ascorbic acid, citric acid, potassium sorbate, and thymus vulgaris extract on the growth of aeromonas caviae and aeromonas sobria were investigated. sodium chloride (3%) significantly reduced the growth and 4% nacl inhibited growth of the tested strains. ascorbic acid (0. 1%), potassium sorbate (0.05%), and citric acid (0.03%) slightly inhibited growth. t. vulgaris extract (0.3%) greatly reduced the growth. various combinations of these com ... | 2000 | 10957708 |
| [cultivation optimization of prolyl endopeptidase and high cell density fermentation]. | engineered e. coli bl21/pgem-pep could constitutively express recombinant prolyl endopeptidase from aeromonas punctata, which was extremely effected by culture conditions, so fermentation conditions were optimized to obtain it's high expression level. firstly, the stability of bl21/pgem-pep was investigated, then, culture temperature, ph, time, medium were optimized in shake flaskd. the l9(3(4)) orthogonal experiment confirmed that shaker speed, ph, culture temperature, culture time had high deg ... | 2000 | 10976323 |
| [phenotype markers in strains of aeromonas isolated in cuba from children with an acute diarrheic disease]. | twenty-seven cases of aeromonas isolated from 300 five-years children with acute diarrheal disease (eda) were studied, with the aim for demonstrating the occurrence of some phenotypical markers associated with enteropathogenicity; among them were lysine decarboxylation, acetil methyl carbinol production, enterotoxigenicity, cytotoxicity and hemolysis. the percentage of analysed strains had two or more of the investigated markers, and 13 (48.1%) lysed the rabbit erythrocytes with titres higher th ... | 1995 | 9805080 |
| use of a chia probe for detection of chitinase genes in bacteria from the chesapeake bay(1). | pcr primers specific for the chia gene were designed by alignment and selection of highly conserved regions of chia sequences from serratia marcescens, alteromonas sp., bacillus circulans and aeromonas caviae. these primers were used to amplify a 225 bp fragment of the chia gene from vibrio harveyi to produce a chia gene probe. the chia pcr primers and probe were used to detect the presence of the chia gene in an assemblage of 53 reference strains and gave consistent results. selected chia fragm ... | 2000 | 11053737 |
| [purification and characterization of recombinant aeromonas punctata prolyl endopeptidase]. | the study of down-stream techniques of recombinant aeromonas punctata prolyl endopeptidase (appep) was presented here. high cell-density fermentation of e. coli bl21/pkkh-pep in nbs bioflo 3000 5 l fermentor was achieved, the final cell density was 22.5 g (dcw)/l after 14 h cultivation, the yield of appep expressed in soluble protein was 3.0 g per litter broth. after sonication, the supernatant of free cell extract was purified by ammonium sulfate fractionation, high performance q sepharose ff, ... | 2000 | 11059278 |
| [camp factor for the differentiation among aeromonas species]. | the camp factor technique, described by natale figura as a presumptive method for the differentiation of the species hydrophila, sobria and caviae, was applied to 80 aeromonas strains isolated from children under 5 years with acute diarrheic disease. the typical phenomenon was seen in aerobiosis and anaerobiosis conditions in 10 strains, which were classified as aeromonas hydrophila. in aerobiosis conditions/alone, it was observed in 20 strains, which were identified as aeromonas sobria. it was ... | 1992 | 9768204 |
| role of flm locus in mesophilic aeromonas species adherence. | the adherence mechanism of aeromonas caviae sch3n to hep-2 cells was initially investigated through four mini-tn5 mutants that showed a 10-fold decrease in adherence. these mutants lost motility, flagella, and their lipopolysaccharide (lps) o antigen (o-ag). three genes, flmb-neua-flmd, were found to be interrupted by the transposon insertions; additionally, two other genes, one lying upstream (flma) and one downstream (neub), were found to be clustered in the same operon. while the flma and flm ... | 2001 | 11119490 |
| molecular properties and activity of a carboxyl-terminal truncated form of xylanase 3 from aeromonas caviae w-61. | aeromonas caviae w-61 produces five species of xylanases, xylanases 1, 2, 3, 4, and 5 [nguyen, v.d. et al., biosci. biotechnol. biochem., 56, 1708-1712 (1993) and appl. environ. microbiol., 57, 445-449 (1991)]. while preserving a purified xylanase 3 preparation from a. caviae in solution at 4 degrees c, the xylanase 3 was found to be proteolyzed to give a truncated form with a smaller molecular mass than that of the intact one. it appears likely that the truncated form of xylanase 3 was produced ... | 1998 | 9757562 |
| crystallization and preliminary x-ray analysis of (r)-specific enoyl-coa hydratase from aeromonas caviae involved in polyhydroxyalkanoate biosynthesis. | dimeric (r)-specific enoyl-coenzyme a (coa) hydratase from aeromonas caviae catalyzes the hydration of trans-2-enoyl-coas with carbon lengths of 4-6 to yield their corresponding (r)-3-hydroxyacyl-coas and is essential for polyhydroxyalkanoate (pha) biosynthesis. the enzyme has been crystallized by vapour diffusion against a reservoir solution containing 20% polyethylene glycol 4000, 5% 2-propanol and 20 mm hepes ph 7.0 at 298 k. crystals belong to the monoclinic space group c2, with unit-cell pa ... | 2001 | 11134939 |
| expression and characterization of (r)-specific enoyl coenzyme a hydratase involved in polyhydroxyalkanoate biosynthesis by aeromonas caviae. | complementation analysis of a polyhydroxyalkanoate (pha)-negative mutant of aeromonas caviae proved that orf3 in the pha locus (a 402-bp gene located downstream of the pha synthase gene) participates in pha biosynthesis on alkanoic acids, and the orf3 gene is here referred to as phaj(ac). escherichia coli bl21(de3) carrying phaj(ac). under the control of the t7 promoter overexpressed enoyl coenzyme a (enoyl-coa) hydratase, which was purified by one-step anion-exchange chromatography. the n-termi ... | 1998 | 9457873 |
| enhancement of the virulence of aeromonas caviae diarrhoeal strains by serial passages in mice. | thirteen clinical aeromonas caviae isolates from the faeces of 13 children with mild to severe diarrhoea were tested for enhancement of mouse lethality, adhesion ability, siderophore and cholera toxin cross-reactive (ctc) factor production, by four consecutive passages through mice by intraperitoneal injection of a. caviae suspensions. the passaged a. caviae strains were re-isolated from monomicrobic cardiac blood samples and inocula were prepared for the next passage. all a. caviae isolates pos ... | 2001 | 11289515 |
| identification of a 43-kda outer-membrane protein as an adhesin in aeromonas caviae. | aeromonas spp. are associated with intestinal and extra-intestinal infections. however, the virulence factors of a. caviae remain, for the most part, poorly known. this study examined the interactions involved in the adherence of a. caviae isolates ae56, ae391 and ae398 to hep-2 cells. all strains expressed high levels of aggregative adherence. maximum adhesion occurred with bacteria grown at 22 degrees c, but transmission electron microscopy did not reveal the presence of fimbrial structures on ... | 2001 | 11289516 |
| characterization of the pro-aminopeptidase from aeromonas caviae t-64. | the pro-aminopeptidase from aeromonas caviae t-64 (pro-apac) had maximal activity at 60 degrees c and was more stable than mature apac at temperature up to 65 degrees c for 1 hour. the ph stability of pro-apac ranged from 4.0 to 8.0, which is broader than the range for the mature apac. the kcat/km of pro-apac was 1.4% to 24% of that of mature apac. | 2001 | 11302179 |
| [post-traumatic endophthalmitis with multiple water pathogens]. | a 37-y-old worker for a recycling company suffered from a corneal perforation by a wire which had been in contact with dirt and moisture. | 1997 | 9333666 |
| mesophilic aeromonads in wild and aquacultured freshwater fish. | numbers and species of motile aeromonas were determined in freshly caught freshwater fish, in the surrounding environment, and also during iced chilled storage of fish specimens. although no significant differences were observed in water samples, initial levels for skin, gill, and intestines were significantly lower in farmed rainbow trout (oncorhynchus mykiss) than in wild brown trout (salmo trutta) and pike (esox lucius). during storage of wild specimens, naturally occurring aeromonads grew fa ... | 2001 | 11348001 |
| g561 site-directed deletion mutant chitinase from aeromonas caviae is active without its 304 c-terminal amino acid residues. | a g561 mutant of the aeromonas caviae chitinase chia was made by pcr site-directed deletion mutagenesis in order to study the role of the 304 c-terminal amino acid residues of chia in the enzymatic hydrolysis of chitin. the recombinant chiag561 encoded on a 1.6-kb dna fragment of a. caviae chia was expressed in a heterologous escherichia coli host using the pet20b(+) expression system. the his-tag-affinity-purified recombinant chiag561 had a calculated molecular mass of 63,595 da, which was cons ... | 2001 | 11357514 |
| motility and the polar flagellum are required for aeromonas caviae adherence to hep-2 cells. | aeromonas caviae is increasingly being recognized as a cause of gastroenteritis, especially among the young. the adherence of aeromonads to human epithelial cells in vitro has been correlated with enteropathogenicity, but the mechanism is far from well understood. initial investigations demonstrated that adherence of a. caviae to hep-2 cells was significantly reduced by either pretreating bacterial cells with an antipolar flagellin antibody or by pretreating hep-2 cells with partially purified f ... | 2001 | 11401962 |
| distribution and expression of beta-lactamase genes among aeromonas spp. | clinical and environmental isolates of aeromonas spp. (20 aeromonas caviae, 33 aeromonas veronii and 21 aeromonas hydrophila) were examined for their ability to yield mutants derepressed for beta-lactamase production and for the distribution of the three chromosomally encoded beta-lactamase genes, amps and ceps from a. veronii bv. sobria and cpha from a. hydrophila. of these isolates, 100% and 96% of the isolates from a. hydrophila and a. caviae, respectively, yielded beta-lactamase derepressed ... | 1997 | 9301981 |
| virulence factors in vibrios and aeromonads isolated from seafood. | thirty-one isolates from seafood, identified as aeromonas hydrophila (7), aeromonas caviae (11), vibrio parahaemolyticus (3), vibrio fluvialis (5), vibrio alginolytictus (3), vibrio metschnikovii (1) and vibrio damsela (1), were tested for possible virulence factors including extracellular hydrolytic enzymes, haemolysins, cytotoxins (vero and hep-2 cells) and adherence ability (hep-2 cells). all the a. hydrophila strains were beta-haemolytic and produced cytotoxins as well as one strain of v. fl ... | 2001 | 11497085 |
| a secreted aminopeptidase of pseudomonas aeruginosa. identification, primary structure, and relationship to other aminopeptidases. | using leucine-p-nitroanilide (leu-pna) as a substrate, we demonstrated aminopeptidase activity in the culture filtrates of several pseudomonas aeruginosa strains. the aminopeptidase was partially purified by deae-cellulose chromatography and found to be heat stable. the apparent molecular mass of the enzyme was approximately 56 kda; hence, it was designated ap(56). heating (70 degrees c) of the partially purified aminopeptidase preparations led to the conversion of ap(56) to a approximately 28-k ... | 2001 | 11533066 |
| helicobacter pylori and other enteric bacteria in freshwater environments in mexico city. | helicobacter pylori infection is common in the mexican population; however, sources, routes, and risk factors for infection as well as mode of transmission remain unclear. | 2001 | 11578764 |
| characterization of 13 kda granule-associated protein in aeromonas caviae and biosynthesis of polyhydroxyalkanoates with altered molar composition by recombinant bacteria. | analysis of native poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) [p(3hb-co-3hhx)] inclusions from aeromonas caviae fa440 revealed that orf1 (a 348-bp gene located immediately upstream of phac(ac)) encodes a 13-kda granule-associated protein, which was referred to as phap(ac). several recombinant strains of a. caviae were constructed and conducted to analyze their pha-producing abilities. a transconjugant of fa440 harboring additional copies of phapcj(ac) genes accumulated p(3hb-co-3hhx) copolyes ... | 2001 | 11749166 |
| lateral flagella and swarming motility in aeromonas species. | swarming motility, a flagellum-dependent behavior that allows bacteria to move over solid surfaces, has been implicated in biofilm formation and bacterial virulence. in this study, light and electron microscopic analyses and genetic and functional investigations have shown that at least 50% of aeromonas isolates from the species most commonly associated with diarrheal illness produce lateral flagella which mediate swarming motility. aeromonas lateral flagella were optimally produced when bacteri ... | 2002 | 11751834 |
| isolation and identification of motile aeromonas species from chicken. | in this study a total of 140 broiler carcasses and carcass parts purchased at different supermarkets in ankara including 50 whole carcass, 30 wing, 30 leg and 30 breast samples were analysed for the presence of motile aeromonas species. according to analysis findings, motile aeromonas spp. were isolated from 116 (82.9%) of total 140 samples. the distribution of the isolates were 94%, 86.6%, 80%, 63.3% in broiler carcass, wing, leg and breast samples, respectively. aeromonas hydrophila was isolat ... | 2001 | 11765602 |
| effect of high oxygen modified atmosphere packaging on microbial growth and sensorial qualities of fresh-cut produce. | the application of high oxygen atmospheres (hoa) (i.e. > 70% o2) for packaging ready-to-eat vegetables was evaluated as an alternative technique for low o2 equilibrium modified atmosphere (ema) packaging (3% o2-5% co2-balance n2) for respiring products. comparative experiments between both techniques were performed in-vitro and in-vivo. typical spoilage causing microorganisms (pseudomonas fluorescens, candida lambica), the moulds botrytis cinerea, aspergillus flavus and the opportunistic psychro ... | 2001 | 11789938 |
| type ii topoisomerase quinolone resistance-determining regions of aeromonas caviae, a. hydrophila, and a. sobria complexes and mutations associated with quinolone resistance. | most aeromonas strains isolated from two european rivers were previously found to be resistant to nalidixic acid. in order to elucidate the mechanism of this resistance, 20 strains of aeromonas caviae (n = 10), a. hydrophila (n = 5), and a. sobria (n = 5) complexes, including 3 reference strains and 17 environmental isolates, were investigated. fragments of the gyra, gyrb, parc, and pare genes encompassing the quinolone resistance-determining regions (qrdrs) were amplified by pcr and sequenced. ... | 2002 | 11796341 |
| detection of aeromonas caviae in the common housefly musca domestica by culture and polymerase chain reaction. | aeromonas caviae has been implicated in diarrhoeal disease of livestock and humans. the potential role of houseflies in the epidemiology of this pathogen was investigated by examining the prevalence of a. caviae in houseflies collected from two south carolina farms and one restaurant. isolation was accomplished by culture of flies in alkaline peptone water followed by identification with aeromonas-specific pcr using novel primers (apw-pcr). all isolates cultured from houseflies were identified a ... | 2001 | 11811891 |
| virulence factors of clinical isolates of aeromonas caviae. | the mechanism of pathogenicity of 13 aeromonas caviae strains isolated from fecal specimens of children with diarrhea was examined. isolates possessed several virulence agents. six of 13 isolates produced cholera-like toxin, all strains exhibited adhesive ability and secreted catecholate siderophores. six isolates were able to grow in heat-inactivated serum. production of hemolysins was not detected. the isolates had relatively high values of ld50 in a mouse model, which suggests that there is n ... | 2001 | 11830944 |
| in vitro antimicrobial susceptibility of clinical isolates of aeromonas caviae, aeromonas hydrophila and aeromonas veronii biotype sobria. | | 2002 | 11909850 |
| cloning and analysis of the poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) biosynthesis genes of aeromonas caviae. | a 5.0-kbp ecorv-ecori restriction fragment was cloned and analyzed from genomic dna of aeromonas caviae, a bacterium producing a copolyester of (r)-3-hydroxybutyrate (3hb) and (r)-3-hydroxyhexanoate (3hhx) [p(3hb-co-3hhx)] from alkanoic acids or oils. the nucleotide sequence of this region showed a 1,782-bp poly (3-hydroxyalkanoate) (pha) synthase gene (phac(ac) [i.e., the phac gene from a. caviae]) together with four open reading frames (orf1, -3, -4, and -5) and one putative promoter region. t ... | 1997 | 9244271 |
| enhanced accumulation and changed monomer composition in polyhydroxyalkanoate (pha) copolyester by in vitro evolution of aeromonas caviae pha synthase. | by in vitro evolution experiment, we have first succeeded in acquiring higher active mutants of a synthase that is a key enzyme essential for bacterial synthesis of biodegradable polyester, polyhydroxyalkanoate (pha). aeromonas caviae fa440 synthase, termed phac(ac), was chosen as a good target for evolution, since it can synthesize a pha random copolyester of 3-hydroxybutyrate and 3-hydroxyhexanoate [p(3hb-co-3hhx)] that is a tough and flexible material compared to polyhydroxybutyrate (phb) hom ... | 2002 | 11976116 |
| in vitro stepwise autoprocessing of the proform of pro-aminopeptidase processing protease from aeromonas caviae t-64. | pa protease (pro-aminopeptidase processing protease) is an extracellular zinc metalloprotease produced by the gram-negative bacterium aeromonas caviae t-64. the 590-amino-acid precursor of pa protease is composed of a putative 19-amino-acid signal sequence, a 165-amino-acid n-terminal propeptide, a 33 kda mature protease domain and an 11 kda c-terminal propeptide. the proform of pa protease, which was produced as inclusion bodies in escherichia coli, was subjected to in vitro refolding. it was r ... | 2002 | 11983417 |
| lateral flagella of aeromonas species are essential for epithelial cell adherence and biofilm formation. | mesophilic aeromonas strains express a single polar flagellum in all culture conditions and produce lateral flagella on solid media. such hyperflagellated cells demonstrate increased adherence. nine lateral flagella genes, lafa-u for aeromonas hydrophila, and four aeromonas caviae genes, lafa1, lafa2, lafb and fliu, were isolated. mutant characterization, nucleotide and n-terminal sequencing demonstrated that the a. hydrophila and a. caviae lateral flagellins were almost identical, but were dist ... | 2002 | 11985716 |
| engineering of ralstonia eutropha for production of poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) from fructose and solid-state properties of the copolymer. | recombinant ralstonia eutropha capable of producing poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) copolymer [p(3hb-co-3hhx)] from fructose was engineered by introduction of genes for crotonyl-coa reductase (ccr) from streptomyces cinnamonensis (ccrsc) and for pha synthase and (r)-specific enoyl-coa hydratase from aeromonas caviae (phac-jac). in this recombinant strain, c6-acyl-coa intermediates were provided via beta-ketothiolase-mediated elongation of butyryl-coa, which was generated from croto ... | 2002 | 12005535 |
| synthesis of a novel class of polyhydroxyalkanoates in arabidopsis peroxisomes, and their use in monitoring short-chain-length intermediates of beta-oxidation. | the poly[(r)-3-hydroxyalkanoate] (pha) synthase gene (phac(ac)) of aeromonas caviae fa440 was modified by adding a peroxisome targeting signal encoding the last 10 amino acids at the carboxyl-terminal of spinach glycolate oxidase. the modified gene was introduced into arabidopsis thaliana plants by agrobacterium-mediated transformation. the transgenic arabidopsis plant expressed the introduced gene and its protein, and it accumulated pha in its tissues. gas chromatography-mass spectrometry analy ... | 2002 | 12040103 |
| an expression release system for heterogeneous proteins in e.coli mediated by the kil gene. | an expression release system for heterogeneous proteins in escherichia coli mediated by the colicin release gene(kil gene) was constructed. the system is based on the ability of the kil protein to release periplasmic proteins into the growth medium. beta-lactamase, an e.coli periplasmic protein, and prolyl endopeptidase (pep), a periplasmic protein of aeromonas punctata subsp. punctata were used as report proteins. commonly, these two proteins are seldom released into the growth medium. the resu ... | 2001 | 12040395 |
| high-efficiency expression of prolyl endopeptidase from aeromonas punctata subsp. punctata in escherichia coli. | the open reading frame (orf) of prolyl endopeptidase gene from aeromonas punctata subsp. punctata (appep) was amplified by pcr in three parts. the amplified dna segments were ligated to form the complete appep gene, and then cloned into expression vectors pbl (temperature inducible) and pkkh (iptg inducible), respectively. after induction, the expression amounts of recombinant appep in bl21/pkkh-pep and bl21/pbl-pep were about 30% of the total bacterial proteins, and the enzyme activities were 1 ... | 2000 | 12098799 |
| vector potential of houseflies for the bacterium aeromonas caviae. | houseflies, musca domestica linnaeus (diptera: muscidae), have been implicated as vectors or transporters of numerous gastrointestinal pathogens encountered during feeding and ovipositing on faeces. the putative enteropathogen aeromonas caviae (proteobacteria: aeromonadaceae) may be present in faeces of humans and livestock. recently a. caviae was detected in houseflies by pcr and isolated by culture methods. in this study, we assessed the vector potential of houseflies for a. caviae relative to ... | 2002 | 12109714 |
| properties of recombinant aeromonas punctata prolyl endopeptidase. | the properties of recombinant aeromonas punctata prolyl endopeptidase(appep) were studied using specific substrate and peptides. results show that the optimum catalytic temperature and ph was 34 degrees and 8.4, the stability of the appep was in the range of 4-32 degrees and ph 6.0-10.0, and its k(m) was 0.03 mmol/l based on the z-gly-pro-betana. the appep was not sensitive to pmsf, tlck, tpck, trypsion inhibitor, edta, tetrathionate and some metal ions, but was sensitive to sds and zn(2 ), and ... | 1999 | 12110936 |
| cloning and nucleotide sequencing of prolyl endopeptidase gene from aeromonas punctata subsp. punctata. | prolyl endopeptidase activity was found in aeromonas punctata subsp. punctata. the genomic dna was partially digested with ecori and the recovered 8-16 kb dna fragments were inserted into the ecori site of plasmid puc19, and were transformated into escherichia coli dh5alpha. the resulted clones were screened by using benzyloxycarbonyl-gly-pro-beta-naphthylamide, the specific substrate of prolyl endopeptidase and a positive clone was obtained. the 12 kb insertion fragment of recombinant plasmid w ... | 1999 | 12114972 |
| the species composition of oligotrophic bacterial communities of lake balaton--a numerical analysis. | from among the 565 aerobic and facultatively anaerobic, oligotrophic bacterial isolated obtained from the open water region of the balatonfüred-bay, 58 representative strains were selected for detailed taxonomic-physiological studies and numerical analyses as well as simultaneous comparisons with authentic bacterial strains isolated earlier by langó (1987) from different water habitat of the lake balaton. on the basis of 186 ceded differential diagnostic characteristics involved in these analyse ... | 1996 | 9147724 |
| the role of the n-terminal propeptide of the pro-aminopeptidase processing protease: refolding, processing, and enzyme inhibition. | pro-aminopeptidase processing protease (pa protease) is an extracellular zinc metalloprotease produced by aeromonas caviae t-64 and it is classified as m04.016 according to the merops database. the precursor of pa protease consists of four regions; a signal peptide, an n-terminal propeptide, a c-terminal propeptide, and the mature pa protease. the in vitro refolding of the intermediate pro-pa protease containing the c-terminal propeptide (mc) was investigated in the presence and absence of the n ... | 2002 | 12147230 |
| in vivo evolution of the aeromonas punctata polyhydroxyalkanoate (pha) synthase: isolation and characterization of modified pha synthases with enhanced activity. | in vivo random mutagenesis of the polyhydroxyalkanoate (pha) synthase gene from aeromonas punctata was performed employing the mutator strain escherichia coli xl1-red. about 200,000 mutants were screened on nile red-containing medium and five mutants with enhanced fluorescence were selected. four of these mutants exhibited enhanced in vivo and in vitro pha synthase activity. mutant m1, which carried the single mutation f518i, showed a five-fold increase in specific pha synthase activity, whereas ... | 2002 | 12172613 |
| biochemical identification and numerical taxonomy of aeromonas spp. isolated from environmental and clinical samples in spain. | to study the phenotypic characteristics of aeromonas spp. from environmental and clinical samples in spain and to cluster these strains by numerical taxonomy. | 2002 | 12174040 |
| effect of superatmospheric oxygen packaging on sensorial quality, spoilage, and listeria monocytogenes and aeromonas caviae growth in fresh processed mixed salads. | atmospheres with o2 levels higher than 70 kpa have recently been suggested as an innovation to modified atmosphere packaging (map) for fresh processed vegetables to maintain sensory quality and safety. in the present work, mixed vegetable salad collected from a commercial processing plant and stored with the map technique was studied. two gas mixtures were actively generated by using an initial o2 concentration of 95 kpa and combined with two plastic films. the low-barrier film permeability for ... | 2002 | 12380740 |
| crystal structure of the (r)-specific enoyl-coa hydratase from aeromonas caviae involved in polyhydroxyalkanoate biosynthesis. | the (r)-specific enoyl coenzyme a hydratase ((r)-hydratase) from aeromonas caviae catalyzes the addition of a water molecule to trans-2-enoyl coenzyme a (coa), with a chain-length of 4-6 carbons, to produce the corresponding (r)-3-hydroxyacyl-coa. it forms a dimer of identical subunits with a molecular weight of about 14,000 and is involved in polyhydroxyalkanoate (pha) biosynthesis. the crystal structure of the enzyme has been determined at 1.5-a resolution. the structure of the monomer consist ... | 2003 | 12409309 |
| molecular typing of aeromonas isolates in natural mineral waters. | a total of 103 isolates of aeromonas spp. were obtained over a 3-year period from a natural mineral water and from surface streams located within the boundaries of the watershed of the natural mineral water wells and were typed by macrorestriction analysis of genomic dna with xbai and by pulsed-field gel electrophoresis. all aeromonas caviae isolates from the natural mineral water belonged to the same clone, and an analogous clonal identity was found among aeromonas hydrophila isolates. these tw ... | 2003 | 12514065 |
| [gene cloning and expression of prolyl endopeptidase from aeromonas punctata]. | prolyl endopeptidase gene was cloned from aeromonas punctata subsp. punctata(st-78-3-3) using activity screening method and the 3.3 kb dna fragment containing pep gene was sequenced. dna sequence from 20-2092 bp was orf region coding 690 amino acids of prolyl endopeptidase. it was a new pep gene through gene search. the genetic engineered e. coli bl21/pgem-pep overexpressing recombinant aeromonas punctata prolyl endopeptidase(appep) was constructed. cultured in yh medium, the expressed appep was ... | 2000 | 12548992 |
| the genetics of glycosylation in gram-negative bacteria. | in recent years there has been a dramatic increase in reports of glycosylation of proteins in various gram-negative systems including neisseria meningitidis, neisseria gonorrhoeae, campylobacter jejuni, pseudomonas aeruginosa, escherichia coli, caulobacter crescentus, aeromonas caviae and helicobacter pylori. although this growing list contains many important pathogens (reviewed by benz and schmidt [mol. microbiol. 45 (2002) 267-276]) and the glycosylations are found on proteins important in pat ... | 2003 | 12586395 |
| general function of n-terminal propeptide on assisting protein folding and inhibiting catalytic activity based on observations with a chimeric thermolysin-like protease. | pro-aminopeptidase processing protease (pa protease) is a thermolysin-like metalloprotease produced by aeromonas caviae t-64. the n-terminal propeptide acts as an intramolecular chaperone to assist the folding of pa protease and shows inhibitory activity toward its cognate mature enzyme. moreover, the n-terminal propeptide strongly inhibits the autoprocessing of the c-terminal propeptide by forming a complex with the folded intermediate pro-pa protease containing the c-terminal propeptide (mc). ... | 2003 | 12589825 |
| cloning, dna sequence, and expression of aeromonas caviae ws7b chitinase gene. | a chitinase-producing bacterium, designated ws7b, was isolated from a soil sample obtained from a black-pepper plantation on bangka island, indonesia. fatty-acid methyl-ester analysis indicated that the isolate was aeromonas caviae. a chitinase gene from ws7b was cloned in a puc19-based plasmid vector, but without its natural promoter. the complete nucleotide sequence of the gene was determined, and the structural gene consisted of a 2748-bp region encoding 864 amino acids. dna sequence analysis ... | 2003 | 12611264 |
| bacteriocin-like substance (bls) production in aeromonas hydrophila water isolates. | 30 aeromonas hydrophila water isolates were tested for bacteriocin-like substance (bls) production using a target panel of closely related microorganisms and other gram-positive and gram-negative bacteria, including food-borne pathogens. a. hydrophila showed antibacterial activity against one or more indicator microorganisms, but the activity emerged only with non-phylogenetically related genera or species. in particular all a. hydrophila showed antibacterial activity against one or more of the ... | 2003 | 12644237 |
| rapid and sensitive method for the detection of aeromonas caviae and aeromonas trota by polymerase chain reaction. | a 16s rdna-based polymerase chain reaction (pcr) method was developed for the detection of aeromonas caviae and aeromonas trota. these two species were identified from other aeromonas spp. and closely related species by primers set (aer1 and aer2). the amplified product was 316 bp. the identity of the amplified product was confirmed by dna-dna hybridization. two sets of primers (aer8 and aer9) were used for specific identification of aer. caviae. amplifying the 260 bp fragment of 16s rrna gene r ... | 1997 | 9134769 |
| enhanced production of poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) via manipulating the fatty acid beta-oxidation pathway in e. coli. | acyl-coa dehydrogenase gene (yafh) of escherichia coli was expressed together with polyhydroxyalkanoate synthase gene (phac(ac)) and (r)-enoyl-coa hydratase gene (phaj(ac)) from aeromonas caviae. the expression plasmids were introduced into e. coli jm109, dh5 alpha and xl1-blue, respectively. compared with the strains harboring only phac(ac) and phaj(ac), all recombinant e. coli strains harboring yafh, phac(ac) and phaj(ac) accumulated at least four times more poly(3-hydroxybutyrate-co-3-hydroxy ... | 2003 | 12694916 |
| factors associated with the adherence and biofilm formation by aeromonas caviae on glass surfaces. | knowledge on factors of aeromonas caviae promoting the formation of biofilms on surfaces. | 2003 | 12752817 |
| sequence analysis and biochemical characterisation of chromosomal cav-1 (aeromonas caviae), the parental cephalosporinase of plasmid-mediated ampc 'fox' cluster. | aeromonas caviae cip 74.32 was resistant to amoxicillin, ticarcillin and cephalothin, and susceptible to cefoxitin, cefotaxime, ceftazidime, aztreonam and imipenem. this strain produced a cephalosporinase (pi 7.2) and an oxacillinase (pi 8.5). the cephalosporinase gene cav-1 was cloned and sequenced. unlike a. caviae donor, escherichia coli pnce50 transformant producing cav-1 beta-lactamase was resistant to cefoxitin. the deduced protein sequence cav-1 contained 382 amino acids, and shared >96% ... | 2003 | 12757951 |
| characterization of aeromonas spp. isolated from humans with diarrhea, from healthy controls, and from surface water in bangladesh. | aeromonas isolates from patients with diarrhea in bangladesh (n = 69), from healthy controls (n = 11), and from surface water (n = 40) were analyzed with respect to their hybridization groups (hgs) by the aid of fatty acid methyl ester (fame) characterization and dna fingerprinting by aflp, biochemical phenotypes (phe-neplate [php] types), and the production of hemolysin and cytotoxin. the aim of the investigation was to find out whether certain strains carrying virulence factors predominated am ... | 1997 | 9003598 |
| lateral flagella are required for increased cell adherence, invasion and biofilm formation by aeromonas spp. | two types of flagella are responsible for motility in mesophilic aeromonas strains. a polar unsheathed flagellum is expressed constitutively that allows the bacterium to swim in liquid environments and, in media where the polar flagellum is unable to propel the cell, aeromonas express peritrichous lateral flagella. recently, southern blot analysis using a dna probe based on the aeromonas caviae sch3n lateral flagellin gene sequence showed a good correlation between strains positive for the dna p ... | 2003 | 12855171 |
| aeromonas veronii biovar veronii septicaemia and acute suppurative cholangitis in a patient with hepatitis b. | gram-negative bacilli of the genus aeromonas are widespread in aquatic environments and can be responsible for human infections. although aeromonas extraintestinal and systemic infections have been reported with growing frequency in recent years, aeromonas septicaemia remains an uncommon finding, often associated with serious underlying disease and predominantly related to the species aeromonas hydrophila, aeromonas veronii biovar sobria and aeromonas caviae. here, a case of a. veronii biovar ve ... | 2003 | 12867570 |
| alteration of chain length substrate specificity of aeromonas caviae r-enantiomer-specific enoyl-coenzyme a hydratase through site-directed mutagenesis. | aeromonas caviae r-specific enoyl-coenzyme a (enoyl-coa) hydratase (phaj(ac)) is capable of providing (r)-3-hydroxyacyl-coa with a chain length of four to six carbon atoms from the fatty acid beta-oxidation pathway for polyhydroxyalkanoate (pha) synthesis. in this study, amino acid substitutions were introduced into phaj(ac) by site-directed mutagenesis to investigate the feasibility of altering the specificity for the acyl chain length of the substrate. a crystallographic structure analysis of ... | 2003 | 12902277 |
| [variability of pseudomonas punctata]. | | 1953 | 13081082 |
| [classification of the forms of pseudomonas punctata; classification of pseudomonas species according to bergey's manual]. | | 1954 | 13179872 |
| studies of aeromonas formicans crawford comb. nov. from soluble oil emulsions. | | 1957 | 13416178 |
| taxonomic relationships among the pseudomonads. | colwell, r. r. (university of washington, seattle), and j. liston. taxonomic relationships among the pseudomonads. j. bacteriol. 82:1-14. 1961.-an electronic computer technique, utilizing the adansonian principle that every feature should have equal weight, was applied in an effort to derive a taxonomy of the pseudomonas-achromobacter group of gram-negative, asporogenous, rodlike bacteria. the validity of the general method was tested by an analysis of 40 well defined strains, principally derive ... | 1961 | 13694873 |
| taxonomic analysis with the electronic computer of some xanthomonas and pseudomonas species. | colwell, r. r. (university of washington, seattle) and j. liston. taxonomic analysis with the electronic computer of some xanthomonas and pseudomonas species. j. bacteriol. 82:913-919. 1961.-forty organisms, including 16 xanthomonas spp., 5 strains of pseudomonas solanacearum, 4 strains of p. aeruginosa, 6 strains of p. fluorescens, 5 freshly isolated strains of pseudomonads, as well as the american type culture collection strains of flavobacterium aquatile, vibrio cuneatus, vibrio metschnikovii ... | 1961 | 13880721 |
| [the action in vitro of kanamycin on aeromonas punctata]. | | 1961 | 13880924 |
| [the production of putrefaction of the caudal fin in fish by the action of aeromonas punctata]. | | 1961 | 13880926 |
| characterization of cytotoxic, hemolytic aeromonas caviae clinical isolates and their identification by determining presence of a unique hemolysin gene. | aeromonas caviae has recently been recognized as an important enteropathogen and its hemolysin is purported to be one of the virulence factors, in this study, a total of 80 clinical isolates of aeromonas spp. were investigated by pcr with synthetic oligonucleotides targeting a cloned hemolysin-encoding sequence from an a. caviae isolate of clinical origin. of the 35 clinical a. caviae isolates tested, only 6 contained the target sequence. | 1996 | 8940472 |
| the c-terminal module of chi1 from aeromonas caviae cb101 has a function in substrate binding and hydrolysis. | the chitinase gene chi1 of aeromonas caviae cb101 encodes an 865-amino-acid protein (with signal peptide) composed of four domains named from the n-terminal as an all-beta-sheet domain chin, a triosephosphate isomerase (tim) catalytic domain, a function-unknown a region, and a putative chitin-binding domain (chbd) composed of two repeated sequences. the n-terminal 563-amino-acid segment of chi1 (chi1deltaadeltachbd) shares 74% identity with chia of serratia marcescens. by the homology modeling m ... | 2003 | 14635132 |
| structural studies of the o-antigenic polysaccharide from an aeromonas caviae strain. | the structure of the o-antigenic polysaccharide from a strain of aeromonas caviae, isolated from the stools of a patient with diarrhoea, has been investigated. sugar analysis, methylation analyses, and a uronic acid degradation together with nmr spectroscopy were the principal methods used. the sequence of the sugar residues could be determined by noesy and hmbc experiments. it is concluded that the polysaccharide is composed of pentasaccharide repeating units with the following structure: [sequ ... | 1996 | 8864229 |
| enteropathogenic activity and invasion of hep-2 cells by aeromonas caviae clinical isolates. | twenty aeromons caviae isolates from stool of children with diarrhea symptoms were examined for virulence-associated properties: production of cytotoxic and cytotonic toxins, and invasive ability. most of a. caviae strains were cytotoxic to vero and cho cells and produced cytotonic toxins which caused elongation of cho cells. moreover, five of a. caviae strains revealed invasive ability towards hep-2 cells. | 2003 | 14743980 |
| proteolytic activity of aeromonas caviae. | aeromonas strains produce a variety of virulence factors including proteases. studies on the kinetics of growth of aeromonas caviae nrrl b-966 and its proteases suggest that the proteolytic activities are produced throughout the growth phase, with peak level occurring at stationary phase. a. caviae synthesize both intracellular and extracellular proteases with the latter account for major portion of the total activity. optimum ph for the a. caviae proteolytic activity is at 7.0. a. caviae produc ... | 1995 | 7473065 |
| factors influencing beta-galactosidase activity of aeromonas caviae. | aeromonas caviae, often reported to be associated with diarrhoeal patients, elaborates several virulence factors as well as catabolic enzymes such as xylanase and beta-galactosidase. studies on the kinetics of growth of a. caviae and synthesis of beta-galactosidase suggested that the activity was cell associated and reached a peak during the late logarithmic phase of growth. the optimum ph for beta-galactosidase activity was 7.0 and required ca2+ and glutathione for enhancement of its activity; ... | 1994 | 7932108 |
| el fenómeno suicida en cepas de aeromonas mesófilas aisladas de muestras clínicas [the suicide phenomenon in strains of mesophilic aeromonas isolated from clinical specimens]. | a study was carried out to determine the occurrence of the suicide phenomenon in aeromonas spp strains, isolated from clinical samples, and to establish its relationship with the clinical manifestations of diarrheal diseases. 23 strains were studied: 10, of aeromonas sobria; 7, of aeromonas hydrophila; and 6, of aeromonas caviae. all suicidal strains were isolated from patients with acute diarrheal disease. 3 out of 8, isolated from non-diarrheic feces, showed an intermediate phenotypic profile. ... | 1993 | 7984811 |
| [the identification of aeromonas species isolated in cuba]. | 100 aeromonas strains, isolated from children under 5 years with acute diarrheal diseases from various health centers of the country, were studied from january to july, 1990. using the janda-modified popoff's and veron's model, 63% of the strains were identified in species through primary tests, and 100% of the other 37% were identified in aeromonas sobria, aeromonas hydrophila, and aeromonas caviae, using also supplementary tests. | 1993 | 7984818 |
| aeromonas peritonitis. | five new cases of peritonitis caused by aeromonas species are reported, and 29 others described in the literature are reviewed. males predominated (71%), and the mean age was 56.9 years. acquisition was nosocomial in 20% of the cases. all patients except one (3%) had significant underlying diseases; 73% had chronic hepatic disease, 15% had chronic renal failure (treated with chronic ambulatory peritoneal dialysis [capd]), and 9% had an intestinal perforation. symptoms were similar to those of pe ... | 1994 | 8054435 |
| diarrhea associated with aeromonas species in children in day care centers. | outbreaks of diarrhea caused by enteropathogens have been reported in day care centers (dcc), but aeromonas species have not been implicated. this study evaluated 381 children involved in 51 outbreaks in four dcc to determine the association of aeromonas species with diarrhea and to characterize the isolates. the organism was identified in two outbreaks of diarrhea. in one, aeromonas species were isolated from 6 (24%) of 25 children and in the other from 5 (21%) of 24 children. seven other aerom ... | 1993 | 8515113 |
| prevention of suicide phenomenon in aeromonads. | clinical isolates of aeromonas (13 aeromonas caviae), 8 aeromonas hydrophila, 3 aeromonas spp., and 2 aeromonas media recovered from diarrheal feces of children were submitted to the suicide phenomenon test and investigated at intervals of 24 h for up to 120 h. the same isolates were also stimulated by repeated passages in broth for ten days before the test. after the bacterial stimulus, a decreases in the number of aeromonads with suicidal capacity was observed. the suicide phenomenon was expre ... | 1996 | 8793406 |
| xynx, a possible exo-xylanase of aeromonas caviae me-1 that produces exclusively xylobiose and xylotetraose from xylan. | a gene, xynx, encoding a novel xylanase, was cloned from aeromonas caviae me-1. this gene encoded an enzyme that was constituted of 334 amino acid residues (38,580 da) and was similar in sequence to family 10 (family f) beta-1,4 endo-xylanases. xynx produced only xylobiose and xylotetraose from birch wood xylan, and xylotriose, xylopentaose, and higher oligosaccharides were not detected in the tlc analysis. we designated it as x2/x4-forming xylanase. this enzyme does not have transglycosylation ... | 1999 | 10500996 |
| [case of infectious hepatic cyst caused by aeromonas caviae]. | | 1999 | 10581795 |
| hemolytic activity and siderophore production in different aeromonas species isolated from fish. | the hemolytic activity and siderophore production of several strains of motile aeromonads were determined. the hemolytic activity of aeromonas caviae and aeromonas eucrenophila was enhanced after trypsinization of the samples. the enhancement of hemolysis was observed in strains that carried an aerolysin-like gene, detected by a pcr procedure. siderophore production was demonstrated in all but one strain of aeromonas jandaei. no apparent relationship was observed between the presence of plasmid ... | 1999 | 10584028 |
| impact of an urban effluent on antibiotic resistance of riverine enterobacteriaceae and aeromonas spp. | in order to evaluate the impact of an urban effluent on antibiotic resistance of freshwater bacterial populations, water samples were collected from the arga river (spain), upstream and downstream from the wastewater discharge of the city of pamplona. strains of enterobacteriaceae (representative of the human and animal commensal flora) (110 isolates) and aeromonas (typically waterborne bacteria) (118 isolates) were selected for antibiotic susceptibility testing. most of the aeromonas strains (7 ... | 2000 | 10618213 |
| molecular cloning of two (r)-specific enoyl-coa hydratase genes from pseudomonas aeruginosa and their use for polyhydroxyalkanoate synthesis. | two pseudomonas aeruginosa genes, termed phaj1(pa) and phaj2(pa), homologous to the aeromonas caviae (r)-specific enoyl-coa hydratase gene (phaj(ac)) were cloned using a pcr technique to investigate the monomer-supplying ability for polyhydroxyalkanoate (pha) synthesis from beta-oxidation cycle. two expression plasmids for phaj1(pa) and phaj2(pa) were constructed and introduced into escherichia coli dh5alpha strain. the recombinants harboring phaj1(pa) or phaj2(pa) showed high (r)-specific enoyl ... | 2000 | 10713420 |
| epidemiological relationships between aeromonas strains isolated from symptomatic children and household environments as determined by ribotyping. | ribotyping was used to study the epidemiology of aeromonas associated gastro-enteritis in young children. ribotyping patterns of 29 aeromonas strains (16 aeromonas caviae, 8 aeromonas hydrophila, 3 aeromonas eucrenophila, 1 aeromonas veronii, and 1 aeromonas encheleia) isolated from primary stool cultures of sick children were compared using the gelcompare software with patterns of 104 strains (39 aeromonas eucrenophila, 29 aeromonas caviae, 11 aeromonas encheleia, 10 aeromonas hydrophila, 6 aer ... | 2000 | 10997832 |