| a unique epidermal mucus lectin identified from catfish (silurus asotus): first evidence of intelectin in fish skin slime. | the present study reports a new type of skin mucus lectin found in catfish silurus asotus. the lectin exhibited calcium-dependent mannose-binding activity. when mannose eluate from chromatography with mannose-conjugated agarose was analyzed by sds-page, the lectin appeared as a single 35-kda band. gel filtration showed that the lectin forms monomers and dimers. a 1216-bp cdna sequence obtained by race-pcr from the skin encoded a 308 amino acid secretory protein with homology to mammalian and fis ... | 2011 | 21757471 |
| three goose-type lysozymes in the gastropod oncomelania hupensis: cdna sequences and lytic activity of recombinant proteins. | three goose-type (g-type) lysozymes, designated as ohlysg1, ohlysg2 and ohlysg3 were identified from expressed sequence tags (ests) of a gastropod oncomelania hupensis, the intermediate host of schistosoma japonicum. the full cdna sequences of ohlysg1, ohlysg2 and ohlysg3 consisted of 735, 909 and 808 nucleotides, with an open reading frame of 198, 214 and 249 codons containing a 21, 7 and 8 amino acid (aa) signal peptide at the n-terminus, respectively. the three g-type lysozymes shared conserv ... | 2011 | 21756934 |
| bacillus amyloliquefaciens g1: a potential antagonistic bacterium against eel-pathogenic aeromonas hydrophila. | recent studies have revealed that the use of probiotics is an alternative to control marine aeromonas. however, few probiotics are available against aeromonas hydrophila infections in eels. in the present study, a potential antagonistic strain g1 against the eel-pathogenic a. hydrophila was isolated from sediment underlying brackish water. its extracellular products with antibacterial activities were shown to be stable under wide range of ph, temperature, and proteinase k. it was initially ident ... | 2011 | 21754944 |
| Identification of differentially expressed protective genes in liver of two rainbow trout strains. | Since 1975, the rainbow trout strain BORN (Germany) has been bred in brackish water from a coastal form imported from Denmark. Accompanying phenotypic monitoring of the adapted BORN trout until now revealed that this selection strain manifested a generally elevated resistance towards high stress and pathogenic challenge including lower susceptibility towards Aeromonas salmonicida infections in comparison to other trout strains in local aqua farms. We focus on the elucidation of both, genetic bac ... | 2011 | 22196148 |
| the effect of metals on condition and pathologies of european eel (anguilla anguilla): in situ and laboratory experiments. | forty-nine wild eels (anguilla anguilla) caught in the albufera lake (spain), measuring 24.0-75.0cm in length and 25.0-637.7g in weight, were examined for metals (cd, co, cr, cu, fe, hg, mn, pb, se and zn), condition (ci and hsi indices), as well as for diseases (anguillicola infestation; bacterial infections). total metal load significantly increased in eel liver tissue parallel to total length and body weight (log), while silvering females (w(b)>200g; l≥500mm) exhibited the highest amounts of ... | 2011 | 22030412 |
| occurrence of aeromonas spp. in a random sample of drinking water distribution systems in the usa. | aeromonads are aquatic bacteria found in drinking water supplies worldwide. some species, such as aeromonas hydrophila, can cause disease in humans. for this survey, 293 united states public water systems were selected using random sampling, stratified by water source and system type. water samples were collected during one year from three sites (six samples per site) in each system. temperature, ph, turbidity, total and free chlorine were measured using standard methods. aeromonads were detecte ... | 2011 | 22048437 |
| Simultaneous Detection of Six Diarrhea-Causing Bacterial Pathogens with an In-House PCR-Luminex Assay. | Diarrhea can be caused by a range of pathogens, including several bacteria. Conventional diagnostic methods, such as culture, biochemical tests, and enzyme-linked immunosorbent assay (ELISA), are laborious. We developed a 7-plex PCR-Luminex assay to simultaneously screen for several of the major diarrhea-causing bacteria directly in fecal specimens, including pathogenic Aeromonas, Campylobacter jejuni, Campylobacter coli, Salmonella, Shigella, enteroinvasive Escherichia coli (EIEC), Vibrio, and ... | 2012 | 22075596 |
| inductive expression of toll-like receptor 5 (tlr5) and associated downstream signaling molecules following ligand exposure and bacterial infection in the indian major carp, mrigal (cirrhinus mrigala). | toll-like receptors (tlrs) are one of the key components of innate immunity. among various types of tlrs, tlr5 is involved in recognizing bacterial flagellin and after binding, it triggers myeloid differentiation primary response gene 88 (myd88)-dependent signaling pathway to induce pro-inflammatory cytokines. in this report, we analyzed the expression profile of tlr5 and its associated downstream signaling molecules like myd88 and tumor necrosis factor (tnf) receptor-associated factor (traf) 6 ... | 2012 | 22085689 |
| purification and characterization of enterocin mc13 produced by a potential aquaculture probiont enterococcus faecium mc13 isolated from the gut of mugil cephalus. | a bacteriocin producer strain mc13 was isolated from the gut of mugil cephalus (grey mullet) and identified as enterococcus faecium. the bacteriocin of e. faecium mc13 was purified to homogeneity, as confirmed by tricine sodium dodecyl sulphate - polyacrylamide gel electrophoresis (sds-page). reverse-phase high-performance liquid chromatography (hplc) analysis showed a single active fraction eluted at 26 min, and matrix-assisted laser desorption ionization time of flight (maldi-tof) mass spectro ... | 2011 | 22112158 |
| Acanthamoeba polyphaga, a potential environmental vector for the transmission of food-borne and opportunistic pathogens. | The endosymbiotic relationship could represent for many bacteria an important condition favouring their spread in the environment and in foods. For this purpose we studied the behaviour of some food-borne and opportunistic pathogens (Listeria monocytogenes, Staphylococcus aureus, Enterococcus faecalis, Salmonella enterica serovar Enteritidis, Aeromonas hydrophila, Yersinia enterocolitica) when internalized in Acanthamoeba polyphaga. Our results confirm the capability of the bacteria tested to gr ... | 2011 | 21953544 |
| development and efficacy of novobiocin and rifampicin-resistant aeromonas hydrophila as novel vaccines in channel catfish and nile tilapia. | three attenuated aeromonas hydrophila vaccines were developed from the virulent 2009 west alabama isolates through selection for resistance to both novobiocin and rifampicin. when channel catfish (ictalurus punctatus) were ip injected with 4×105 colony-forming unit (cfu) of the mutants, no fish died. however, when the same age and size matched channel catfish were ip injected with similar amount of their virulent parents, 80-100% fish died. similarly, when nile tilapia (oreochromis niloticus) we ... | 2011 | 21872628 |
| Effective cohorting and "superisolation" in a single intensive care unit in response to an outbreak of diverse multi-drug-resistant organisms. | Cohorting patients in dedicated hospital wards or wings during infection outbreaks reduces transmission of organisms, yet frequently, this may not be feasible because of inadequate capacity, especially in the intensive care unit (ICU). We hypothesized that cohorting isolation patients in one geographic location in a single ICU and using enhanced isolation procedures ("superisolation") can prevent the further spread of highly multi-drug-resistant organisms (MDRO). | 2011 | 21936667 |
| the two-component qsebc signalling system regulates in vitro and in vivo virulence of aeromonas hydrophila. | we recently demonstrated that the n-acyl-homoserine lactone [autoinducer (ai)-1] and luxs (ai-2)-based quorum-sensing (qs) systems exerted positive and negative regulation, respectively, on the virulence of a diarrhoeal isolate ssu of aeromonas hydrophila. however, the role of a newly identified, two-component-based qsebc qs system in the regulation of bacterial virulence in general is not well understood, with only a limited number of studies showing its function in bacterial pathogenesis. in t ... | 2012 | 21998161 |
| Characterization of anticancer, antimicrobial, antioxidant properties and chemical compositions of Peperomia pellucida leaf extract. | Peperomia pellucida leaf extract was characterized for its anticancer, antimicrobial, antioxidant activities, and chemical compositions. Anticancer activity of P. pellucida leaf extract was determined through Colorimetric MTT (tetrazolium) assay against human breast adenocarcinoma (MCF-7) cell line and the antimicrobial property of the plant extract was revealed by using two-fold broth micro-dilution method against 10 bacterial isolates. Antioxidant activity of the plant extract was then charact ... | 2011 | 22071643 |
| complete genomic sequence of a t4-like bacteriophage, phias4, infecting aeromonas salmonicida subsp. salmonicida. | a newly identified virulent phage (named phias4) infecting aeromonas salmonicida subsp. salmonicida was isolated from river water in korea. morphological analysis of phias4 by transmission electron microscopy revealed that it belonged to the family myoviridae. the genome of phias4 comprised a linear double-stranded dna of 163,875 bp with a g + c content of 41.3%, and genomic analysis revealed 271 putative orfs, 67 putative promoters, 25 putative terminator regions, and 16 trna-encoding genes. mo ... | 2011 | 22116495 |
| Bacterial infections of Chinook salmon, Oncorhynchus tshawytscha (Walbaum), returning to gamete collecting weirs in Michigan. | Herein, we describe the prevalence of bacterial infections in Chinook salmon, Oncorhynchus tshawytscha (Walbaum), returning to spawn in two tributaries within the Lake Michigan watershed. Ten bacterial genera, including Renibacterium, Aeromonas, Carnobacterium, Serratia, Proteus, Pseudomonas, Hafnia, Salmonella, Shewanella and Morganella, were detected in the kidneys of Chinook salmon (n = 480) using culture, serological and molecular analyses. Among these, Aeromonas salmonicida was detected at ... | 2012 | 22168454 |
| clinical observations of black disease in fairy shrimps, streptocephalus sirindhornae and branchinella thailandensis, from thailand and pathogen verification. | in this study, black disease infecting fairy shrimps, streptocephalus sirindhornae sanoamuang, murugan, weekers & dumont, and branchinella thailandensis sanoamuang, saengphan & murugan, in thailand, was investigated. the typical signs of the disease are the appearance of black spots on the cuticle, located mainly on the dorsal side and thoracopods. a number of rod-shaped bacteria aggregated in the black spots and were visualized by scanning electron microscopy. the histopathological results show ... | 2011 | 22074019 |
| Screening microorganisms for insulin binding reveals binding by Burkholderia multivorans and Burkholderia cenocepacia and novel attachment of insulin to Aeromonas salmonicida via the A-layer. | Exposure to microorganisms is considered an environmental factor which can contribute to Type 1 diabetes. Insulin binding proteins on microorganisms may induce production of antibodies which can react with the human insulin receptor (HIR) with possible consequences in developing a diabetic autoimmune response against HIR and insulin. The interaction of insulin with microorganisms was studied by screening forty-five microbial species for their ability to bind insulin. Binding assays were performe ... | 2011 | 22171975 |
| Aeromonas salmonicida-secreted protein AopP is a potent inducer of apoptosis in a mammalian and a Drosophila model. | Some pathogens are able to establish themselves within the host because they have evolved mechanisms to disrupt host innate immunity. For example, a number of pathogens secrete preformed effector proteins via type III secretion apparatuses that influence innate immune or apoptotic signalling pathways. One group of effector proteins that usurp innate immune signalling is the YopJ-like family of bacterial effector proteins, which includes AopP from Aeromonas salmonicida. Aeromonas species are know ... | 2011 | 22040305 |
| Bacteremia due to extended-spectrum-ß-lactamase-producing Aeromonas spp. at a medical center in Southern Taiwan. | Although extended-spectrum-ß-lactamase (ESBL)-producing aeromonads have been increasingly reported in recent years, most of them were isolates from case reports or environmental isolates. To investigate the prevalence of ESBL producers among Aeromonas blood isolates and the genes encoding ESBLs, consecutive nonduplicate Aeromonas blood isolates collected at a medical center in southern Taiwan from March 2004 to December 2008 were studied. The ESBL phenotypes were examined by clavulanate combinat ... | 2011 | 21968366 |
| Interactions of bacteria with different mechanisms for chitin degradation result in the formation of a mixed-species biofilm. | In this study, interactions between bacteria possessing either released or cell-associated enzymes for polymer degradation were investigated. For this, a co-culture of Aeromonas hydrophila strain AH-1N as an enzyme-releasing bacterium and of Flavobacterium sp. strain 4D9 as a bacterium with cell-associated enzymes was set up with chitin embedded into agarose beads to account for natural conditions, under which polymers are usually embedded in organic aggregates. In single cultures, strain AH-1N ... | 2012 | 22092834 |
| effect of dietary arginine on growth, intestinal enzyme activities and gene expression in muscle, hepatopancreas and intestine of juvenile jian carp (cyprinus carpio var. jian). | the present study was conducted to test the hypothesis that dietary arginine promotes digestion and absorption capacity, and, thus, enhances fish growth. this improvement might be related to the target of rapamycin (tor) and eif4e-binding protein (4e-bp). a total of 1200 juvenile jian carp, cyprinus carpio var. jian, with an average initial weight of 6·33 (se 0·03) g, were fed with diets containing graded concentrations of arginine, namely, 9·8 (control), 12·7, 16·1, 18·5, 21·9 and 24·5 g argini ... | 2011 | 22013925 |
| Bactericidal activity of grass carp Ctenopharyngodon idella C9-deficient serum against Aeromonas hydrophila. | Neutralizing complement C9 in grass carp Ctenopharyngodon idella sera with rabbit anti-C9 sera against fish complement C9, demonstrated that bactericidal activity against Aeromonas hydrophila of the C9-deficient fish sera was greatly impaired. These results indicated that the fish complement C9 plays a key role in pathogen killing through the lytic pathway. | 2011 | 22141908 |
| site-specific dota/europium-labeling of recombinant human relaxin-3 for receptor-ligand interaction studies. | relaxin-3 (also known as insl7) is a recently identified neuropeptide belonging to the insulin/relaxin superfamily. it has putative roles in the regulation of stress responses, food intake, and reproduction by activation of its cognate g-protein-coupled receptor rxfp3. it also binds and activates the relaxin family peptide receptors rxfp1 and rxfp4 in vitro. to obtain a europium-labeled relaxin-3 as tracer for studying the interaction of these receptors with various ligands, in the present work ... | 2011 | 22187146 |
| a novel in vivo inducible expression system in edwardsiella tarda for potential application in bacterial polyvalence vaccine. | recombinant bacterial vector vaccine is an attractive vaccination strategy to induce the immune response to a carried protective antigen, and the main concern of bacterial vector vaccine is to establish a stable antigen expression system in vector bacteria. edwardsiella tarda is an important facultative intracellular pathogen of both animals and humans, and its attenuated derivates are excellent bacterial vectors for use in recombinant vaccine design. in this study, we design an in vivo inducibl ... | 2011 | 21964456 |
| Two novel homologs of simple C-type lectin in grass carp (Ctenopharyngodon idellus): potential role in immune response to bacteria. | C-type lectins play important roles in glycoprotein metabolism, multicellular integration and immunity. Based on their overall domain structure, they can be classified as different groups which possess different physiological functions. In this study, two novel simple C-type lectins were identified from grass carp (Ctenopharyngodon idellus), an important cultured fish in China. GcCL1 and gcCL2 share an essentially identical gene structure, a conserved promoter region shorter than 300 bp and an a ... | 2011 | 21855640 |
| Study of the microbial ecology of wild and aquacultured Tunisian fresh fish. | Eighty samples of fresh fish were collected in Tunisia and analyzed for microbial load. Quality and hygienic safety of the meat and intestines of wild and aquacultured fresh fish were determined. The mesophilic aerobic plate count and populations of psychrotrophic lactic acid bacteria (LAB) and other psychrotrophic bacteria ranged from 5.67 to 7.29, 4.51 to 6, and 5.07 to 6.21 log CFU/g, respectively. For all microbiological determinations, bacterial counts were lower in meat than in the intest ... | 2011 | 22004828 |
| cloning and expression analysis of the mitochondrial ubiquitin ligase activator of nf-κb (mulan) in atlantic salmon (salmo salar). | nuclear factor-κb (nf-κb) is a transcription factor involved in the regulation of a large number of genes including many involved in bacterial and viral infections. nf-κb is normally sequestered by inhibitory proteins (iκbs) in the cytoplasm of non-stimulated cells. the degradation of iκbs by the ubiquitin proteasome pathway leads to the rapid translocation of nf-κb to the nucleous where it regulates gene transcription. the mitochondrial ubiquitin ligase activator of nf-κb, (mulan), is an e3 ubi ... | 2011 | 22056942 |
| Application of artificial photoperiod in fish: a factor that increases susceptibility to infectious diseases? | This paper describes and evaluates the mortality associated with the potential stressor effect induced by application of artificial photoperiods in rainbow trout (Oncorhynchus mykiss). After application of artificial photoperiods, high mortalities of trout subjected to this management were recorded (36% in LD 14:10 and 25% in LD 24:0) as compared to controls (7%). The recorded signology related to diseased trout included darkening, lethargy and erratic swimming. Among the morphological changes, ... | 2011 | 22160663 |
| arborescent organ necrosis syndrome in catfish, clarias gariepinus (burchell): a case report. | | 2011 | 21916905 |
| [cloning and expression of a outer membrance protein gene(omps(2);) of edwardsiella tarda hb01 and its immunogenicity]. | to construct a recombinant strain bl21(de3)(pet-28a-omps(2);), and obtain a genetic engineering vaccine to provide protective immunity against diseases caused by edwardsiella tarda. | 2011 | 21968306 |
| isolation and partial characterization of a virulent bacteriophage ihq1 specific for aeromonas punctata from stream water. | aeromonas punctata is the causative agent of septicemia, diarrhea, wound infections, meningitis, peritonitis, and infections of the joints, bones and eyes. bacteriophages are often considered alternative agents for controlling bacterial infection and contamination. in this study, we described the isolation and preliminary characterization of bacteriophage ihq1 (family myoviridae) active against the gram-negative bacterial strain a. punctata. this virulent bacteriophage was isolated from stream w ... | 2011 | 21947462 |
| incidence and etiology of omphalitis in pakistan: a community-based cohort study. | although omphalitis (umbilical infections) among newborns is common and a major cause of neonatal deaths in developing countries, information on its burden and etiology from community settings is lacking. this study aimed to determine the incidence and etiology of omphalitis in newborns in high neonatal mortality settings in karachi, pakistan. | 2011 | 22169780 |
| parasitism by protozoan ichthyophthirius multifiliis enhanced invasion of aeromonas hydrophila in tissues of channel catfish. | protozoan ichthyophthirius multifiliis fouquet (ich) and bacterium aeromonas hydrophila are two common pathogens of cultured fish, which cause high fish mortality. currently there is no information available for the effect of parasitism by ich on survival of channel catfish and invasion of a. hydrophila in fish tissues following exposure to a. hydrophila. a trial was conducted in this study to: (1) determine whether a. hydrophila increased fish mortality in ich-parasitized channel catfish; and ( ... | 2011 | 22033433 |
| development of an antibody elisa for potency testing of furunculosis (aeromonas salmonicida subsp salmonicida) vaccines in atlantic salmon (salmo salar l). | the study was conducted in atlantic salmon to establish the initial and basic scientific documentation for an alternative batch potency test for salmon furuculosis vaccines. we assessed the antibody response development for aeromonas salmonicida vaccines at different immunisation temperatures (3, 12 and 18 °c), by an enzyme-linked-immunosorbent assay (elisa) 3, 6, 9 and 12 weeks post vaccination, and the correlation between antibody response and protection in cohabitation challenge experiments p ... | 2011 | 22000732 |
| antigen adsorbed calcium phosphate nanoparticles stimulate both innate and adaptive immune response in fish, labeo rohita h. | calcium phosphate nanoparticles as an antigen/protein delivery was explored in a fish model labeo rohita h. s-layer protein (of aeromonas hydrophila) adsorbed on nano sized calcium phosphate particles elicited both innate and adaptive immune parameters which persisted up to 63 days of post immunization through parenteral immunization and gave cross protections. | 2011 | 21889128 |
| characterization and functional analyses of r-specific enoyl coenzyme a hydratases in polyhydroxyalkanoate-producing ralstonia eutropha. | a genome survey of polyhydroxyalkanoate (pha)-producing ralstonia eutropha h16 detected the presence of 16 orthologs of r-specific enoyl coenzyme a (enoyl-coa) hydratase, among which three proteins shared high homologies with the enzyme specific to enoyl-coas of medium chain length encoded by phaj4 from pseudomonas aeruginosa (phaj4(pa)). the recombinant forms of the three proteins, termed phaj4a(re) to phaj4c(re), actually showed enoyl-coa hydratase activity with r specificity, and the catalyti ... | 2012 | 22081565 |
| validation of the h2s method to detect bacteria of fecal origin by cultured and molecular methods. | using biochemical and molecular methods, this research determined whether or not the h(2)s test did correctly identify sewage-contaminated waters by being the first to use culturing and molecular methods to identify the types and numbers of fecal indicator organisms, pathogens, and other microbes present in sewage samples with positive h(2)s test results. for the culture-based method, samples were analyzed for the presence of fecal bacteria by spread plating the sewage sample onto differential a ... | 2011 | 22038242 |
| different clinical characteristics among aeromonas hydrophila, aeromonas veronii biovar sobria and aeromonas caviae monomicrobial bacteremia. | this study aimed to compare the clinical presentations of aeromonas hydrophila, a. veronii biovar sobria and a. caviae monomicrobial bacteremia by a retrospective method at three hospitals in taiwan during an 8-yr period. there were 87 patients with a. hydrophila bacteremia, 45 with a. veronii biovar sobria bacteremia and 22 with a. caviae bacteremia. compared with a. hydrophila and a. veronii biovar sobria bacteremia, a. caviae bacteremia was more healthcare-associated (45 vs 30 and 16%; p = 0. ... | 2011 | 22065896 |
| first description of the qnrs-like (qnrs5) gene and analysis of quinolone resistance-determining regions in motile aeromonas spp. from diseased fish and water. | antimicrobial resistance patterns in a collection of 33 motile aeromonas species were described in this study. quinolone has been frequently employed for treatment of aeromonas-related diseases, and prolonged use of antimicrobial compounds has led to development of resistant strains. in a sample of diseased fish and environmental water, we evaluated nalidixic acid (n = 19) and ciprofloxacin (n = 4) resistance via minimum inhibitory concentration (mic) assays and the genetic basis was also invest ... | 2011 | 22024339 |
| novel gene cassettes and integrons in antibiotic-resistant bacteria isolated from urban wastewaters. | in this study, the occurrence and diversity of integrons were evaluated in 697 isolates belonging to enterobacteriaceae and aeromonas spp. isolated from urban wastewaters. screening of integrons was performed by dot blot hybridization and inti-positive strains were further characterized. the global prevalence of integrons was 3.73%. three new gene cassettes were identified: a novel aada variant (aada17), a gene putatively involved in cell signaling (dcya) and an open reading frame of unknown fun ... | 2011 | 22127350 |
| adsorptive removal of silver nanoparticles (snps) from aqueous solution by aeromonas punctata and its adsorption isotherm and kinetics. | silver nanoparticles (snps) are being increasingly used in many consumer products and industrial application. the release of snps to the environment is a major concern. here we have studied the adsorptive removal of snps by a snp resistant bacterial species aeromonas punctata, isolated from the sewage environment. the influence of zeta potential on adsorption was investigated at acidic, neutral and alkaline ph and with varying salt (nacl) concentrations. the rate of adsorption and removal of snp ... | 2011 | 22178439 |
| high prevalence of qnr and aac(6')-ib-cr genes in both water-borne environmental bacteria and clinical isolates of citrobacter freundii in china. | we investigated the prevalence of qnr and aac(6')-ib-cr genes in water-borne environmental bacteria and in clinical isolates of enterobacteriaceae, as well as the subtypes of qnr. environmental bacteria were isolated from surface water samples obtained from 10 different locations in hangzhou city, and clinical isolates of citrobacter freundii were isolated from several hospitals in four cities in china. qnra, qnrb, qnrs, and aac(6')-ib-cr genes were screened using pcr, and the genotypes were ana ... | 2011 | 22167061 |
| antimicrobial susceptibility of aeromonas spp. isolated from clinical and environmental sources to 26 antimicrobial agents. | we determined the susceptibility of 144 clinical and 49 environmental aeromonas strains representing 10 different species to 26 antimicrobial agents by the agar dilution method. no single species had a predominantly non-susceptible phenotype. a multi-non-susceptible pattern was observed in three (2.1%) clinical strains and two (4.0%) strains recovered from diseased fish. common clinical strains were more resistant than the corresponding environmental isolates suggesting that resistance mechanism ... | 2011 | 22123695 |
| sds-page heat-shock protein profiles of environmental aeromonas strains. | aeromonas microorganisms normally grow at temperatures between 5 degrees c and 45 degrees c and therefore should have high thermotolerance. thus it was of interest to find out whether a. hydrophila, a. caviae and a. veronii biovar sobria serovars respond to abrupt temperature changes with a heat shock-like response. to this end the present study was undertaken to determine whether aeromonas species exhibits a heat shock response to different temperatures and time factors. the response of aeromon ... | 2011 | 21905633 |
| bacteriological safety issues in red meat and ready-to-eat meat products, as well as control measures. | the importance of eschericha coli o157, listeria monocytogenes and salmonella typhimurium dt104 as meat-borne pathogens is well established. pathogenic bacteria such as aeromonas spp., arcobacter spp., psychrotrophic bacillus cereus, campylobacter spp., clostridium botulinum and non-invasive listeria monocytogenes can be regarded as rookies, but not yet firmly associated with today's production of red meat and meat products. the development of pcr and other dna-based techniques will shed new lig ... | 2002 | 22061614 |
| the impact of cyanobacteria on growth and death of opportunistic pathogenic bacteria. | climate change may cause increased microbial growth in water sources and more knowledge is required on how this may affect the hygienic water quality, i.e., whether increased occurrence of cyanobacteria and algae may stimulate the growth rate of opportunistic pathogenic bacteria. laboratory experiments were performed to investigate if the presence of the cyanobacteria anabanea lemmermannii and microcystis aeruginosa affected the survival and growth rate of the opportunistic pathogenic bacteria a ... | 2011 | 22097011 |
| complete genome sequence of tolumonas auensis type strain (ta 4). | tolumonas auensis fischer-romero et al. 1996 is currently the only validly named species of the genus tolumonas in the family aeromonadaceae. the strain is of interest because of its ability to produce toluene from phenylalanine and other phenyl precursors, as well as phenol from tyrosine. this is of interest because toluene is normally considered to be a tracer of anthropogenic pollution in lakes, but t. auensis represents a biogenic source of toluene. other than aeromonas hydrophila subsp. hyd ... | 2011 | 22180815 |
| transcriptional profiles of multiple genes in the anterior kidney of channel catfish vaccinated with an attenuated aeromonas hydrophila. | a total of 22 uniquely expressed sequence tags (ests) were identified from channel catfish anterior kidney subtractive cdna library at 12 h post vaccination with an attenuated aeromonas hydrophila (al09-71 n+r). of the 22 ests, six were confirmed to be significantly (p < 0.05) induced by the vaccination. of 88 channel catfish genes selected from literature, 14 were found to be significantly (p < 0.05) upregulated by the vaccination. the transcriptional levels of the total 20 genes induced by the ... | 2011 | 22019831 |
| [preparation and identification of ompw monoclonal antibodies]. | to prepare and characterize the mouse monoclonal antibodies against vibrio parahaemolyticus ompw. | 2011 | 21906472 |
| nonspecific immune responses of cathranthus roseus in oreochromis mossambicus. | the present study was performed to determine the efficacy and immune stimulatory effects of crude and water-soluble leaf fraction of cathranthus roseus in oreochromis mossambicus. intraperitoneal injection method was used to administrate the drugs and sheep red blood cells (srbc) which is used as an antigen. lysozyme assay, plate hole diffusion assay, phytochemical analysis and antimicrobial activity screening methods was used to confirm the drug immune responses. in vivo experiments show the si ... | 2011 | 21861775 |
| salt gland adenitis as only cause of stranding of loggerhead sea turtles caretta caretta. | the present study describes pathological and microbiological findings in 9 stranded loggerhead sea turtles caretta caretta, whose only observed lesion was bilateral purulent salt gland adenitis. histological lesions ranged from the presence of abundant eosinophilic material associated with bacterial colonies in the lumen of the central ducts of the glandular lobules to the destruction of the glandular tissue and presence of abundant eosinophilic material composed of heterophils and cell debris, ... | 2011 | 21848124 |
| virulence of aeromonas hydrophila to channel catfish ictaluras punctatus fingerlings in the presence and absence of bacterial extracellular products. | we investigated the virulence of three 2009 west alabama isolates of aeromonas hydrophila (al09-71, al09-72 and al09-73) to channel catfish ictalurus punctatus fingerlings (4.6 +/- 1.3 g) in the presence and absence of extracellular products (ecps) from overnight bacterial culture using both bath immersion and intraperitoneal injection routes. at a concentration of 1.65 x 10(8) colony-forming units (cfu) ml(-1), al09-73 without its ecps killed 100% of the catfish fingerlings within 2 h by bath i ... | 2011 | 21932532 |
| Zoonotic bacteria, antimicrobial use and antimicrobial resistance in ornamental fish: a systematic review of the existing research and survey of aquaculture-allied professionals. | SUMMARYUsing systematic review methodology, global research reporting the frequency of zoonotic bacterial pathogens, antimicrobial use (AMU) and antimicrobial resistance (AMR) in ornamental fish, and human illness due to exposure to ornamental fish, was examined. A survey was performed to elicit opinions of aquaculture-allied personnel on the frequency of AMU and AMR in ornamental fish. The most commonly reported sporadic human infections were associated with Mycobacterium marinum, while Salmone ... | 2012 | 21906415 |
| evaluation of microorganisms cultured from injured and repressed tissue regeneration sites in endangered giant aquatic ozark hellbender salamanders. | investigation into the causes underlying the rapid, global amphibian decline provides critical insight into the effects of changing ecosystems. hypothesized and confirmed links between amphibian declines, disease, and environmental changes are increasingly represented in published literature. however, there are few long-term amphibian studies that include data on population size, abnormality/injury rates, disease, and habitat variables to adequately assess changes through time. we cultured and i ... | 2011 | 22205979 |
| Phenoloxidase in the scallop Chlamys farreri: Purification and antibacterial activity of its reaction products generated in vitro. | Phenoloxidase (PO) was purified from hemocytes of the scallop Chlamys farreri using native-PAGE and gel permeation column chromatography, and then substrate specificity and antibacterial activity generated from reaction products of purified PO were analyzed. The results showed purified PO had a molecular mass of 576 kDa in native-PAGE and 53 kDa in denatured PAGE, and could catalyze the substrates L-3,4-dihydroxyphenylalanine (L-DOPA), dopamine, catechol and hydroquinone suggesting it is a type ... | 2012 | 22119576 |
| bacterial community associated with the intestinal tract of p. monodon in commercial farms. | the potentially important roles of intestinal bacteria on immune response, disease resistance, and nutrition for the black tiger shrimp penaeus monodon have been increasingly investigated. however, so far, little is known about the intestinal bacterial community of the shrimp in the commercial aquaculture settings. in this study, the intestinal bacterial communities of juvenile p. monodon (70 individuals) from eight commercial farms in thailand were examined using 16s rdna pcr-dgge, and seven 16 ... | 2011 | 21915632 |
| the cphaii protein from aquifex aeolicus exhibits a metal-dependent phosphodiesterase activity. | the cphaii protein from the hyperthermophile aquifex aeolicus shows the five conserved motifs of the metallo-β-lactamase (mbl) superfamily and presents 28% identity with the aeromonas hydrophila subclass b2 cpha mbl. the gene encoding cphaii was amplified by pcr from the a. aeolicus genomic dna and overexpressed in escherichia coli using a plex-based expression system. the recombinant cphaii protein was purified by a combination of heating (to denature e. coli proteins) and two steps of immobili ... | 2012 | 22009263 |
| optimized production of scygonadin in pichia pastoris and analysis of its antimicrobial and antiviral activities. | the crab antimicrobial peptide scygonadin is confirmed to have antimicrobial activity against bacteria and it is probably associated with the reproductive immunity in scylla paramamosain. to obtain large quantity of scygonadin for further biological assays, a 306bp cdna sequence encoding the mature peptide of scygonadin was cloned into a secretion vector of ppic9k, and a high-level of the recombinant scygonadin was achieved in pichia pastoris. the optimal expression condition was determined as i ... | 2011 | 22108619 |
| aerolysin from aeromonas hydrophila perturbs tight junction integrity and cell lesion repair in intestinal epithelial ht-29/b6 cells. | aeromonads cause a variety of infections, including gastroenteritis, sepsis, and wound necrosis. pathogenesis of aeromonas hydrophila and its hemolysin has been characterized, but the mechanism of the epithelial barrier dysfunction is currently poorly understood. | 2011 | 21917902 |
| Dietary supplementation with Cynodon dactylon (L.) enhances innate immunity and disease resistance of Indian major carp, Catla catla (Ham.). | Indian major carp (Catla catla) was subjected to study the immunostimulatory effects when the grass Cynodon dactylon(L) ethanolic extract administrated as feed supplement. C. catla was fed with 0% (Control), 0.05% (group I), 0.5% (group II) and 5% (group III) extract provided for 60 days. Blood samples were collected at every 10 days of interval up to 60 days for analyzing the non-specific humoral (lysozyme activity, antiprotease activity and haemolytic complement) and cellular (production of re ... | 2011 | 21888977 |
| induction of toll-like receptor (tlr) 2, and myd88-dependent tlr- signaling in response to ligand stimulation and bacterial infections in the indian major carp, mrigal (cirrhinus mrigala). | toll-like receptor 2 (tlr2) is a member of tlr family. it recognizes a wide range of bacteria and their products, and is involved in inducing innate immune responses. in this article, we reported inductive expression of tlr2 and myeloid differentiation primary response gene 88 (myd88)-dependent signaling in the indian major carp, mrigal (cirrhinus mrigala) which is highly commercially important fish species in the indian subcontinent. ontogeny analysis of tlr2, myd88 and traf6 (tnf receptor asso ... | 2011 | 22207179 |
| molecular cloning, characterization and expression patterns of hsp60 in the grass carp (ctenopharyngodon idella). | hsp60 is a highly immunogenic molecule, which is able to activate a large number of t cell types and is implicated in a variety of autoimmune diseases. the grass carp (ctenopharyngodon idella), a freshwater fish species of the family cyprinidae, accounts for the third biggest value (usd 4.8 billion) at single species level of major cultured fish species in the world. here, we isolated and characterized the hsp60 cdna from grass carp (designated as cihsp60). its cdna was 2434 bp in length and enc ... | 2011 | 21854854 |
| characterization of a vii-like phage specific to escherichia coli o157:h7. | phage vb_ecom_cba120 (cba120), isolated against escherichia coli o157:h7 from a cattle feedlot, is morphologically very similar to the classic phage vii of salmonella enterica serovar typhi. until recently, little was known genetically or physiologically about the vii-like phages, and none targeting e. coli have been described in the literature. the genome of cba120 has been fully sequenced and is highly similar to those of both vii and the shigella phage ag3. the core set of structural and repl ... | 2011 | 21899740 |
| immunomodulatory effect of withania somnifera supplementation diet in the giant freshwater prawn macrobrachium rosenbergii (de man) against aeromonas hydrophila. | the effect of withania somnifera extract supplementation diets on innate immune response in giant freshwater prawn macrobrachium rosenbergii (de man) against aeromonas hydrophila was investigated. the bacterial clearance efficiency significantly increased in prawn fed with 0.1% and 1.0% doses of w. somnifera supplementation diet against pathogen from weeks 1-4 as compared to the control. the innate immune parameters such as, phenoloxidase activity, superoxide anion level, superoxide dismutase ac ... | 2012 | 22118967 |
| virulence genes of aeromonas isolates, bacterial endotoxins and cyanobacterial toxins from recreational water samples associated with human health symptoms. | exposure to cyanobacterial water blooms has been associated with various kinds of adverse health effects. in addition to cyanobacteria and their toxins, the bacteria associated with cyanobacteria could also be the etiological agents. we isolated aeromonas strains (n = 176) from water samples (n = 38) taken from sites where cyanobacteria were suspected to have caused human health symptoms, of which fever and gastrointestinal symptoms were the most common. the isolates were screened by pcr for six ... | 2011 | 22048427 |
| antibody-coated gold nanoparticles immunoassay for direct detection of aeromonas salmonicida in fish tissues. | aeromonas salmonicida is the causative agent of furunculosis, a disease that affects both salmonid and non-salmonid fish. detection of a. salmonicida can be labour intensive and time consuming because of the difficulties in distinguishing the bacterium from other species given the wide variety of existing biochemical profiles and the slow growth characteristics which allow other organisms to overgrow the a. salmonicida. herein, we report the development of a specific immunoassay using gold-conju ... | 2011 | 21988356 |
| QTL detection for Aeromonas salmonicida resistance related traits in turbot (Scophthalmus maximus). | Interactions between fish and pathogens, that may be harmless under natural conditions, often result in serious diseases in aquaculture systems. This is especially important due to the fact that the strains used in aquaculture are derived from wild strains that may not have had enough time to adapt to new disease pressures. The turbot is one of the most promising European aquaculture species. Furunculosis, caused by the bacterium Aeromonas salmonicida, produces important losses to turbot industr ... | 2011 | 22047500 |
| structural determination of the o-specific polysaccharide from aeromonas hydrophila strain a19 (serogroup o:14) with s-layer. | bacteria belonging to the genus aeromonas are gram-negative mesophilic and essentially ubiquitous in the microbial biosphere; moreover they are considered very important pathogens in fish and responsible for a great variety of human infections. the virulence of gram-negative bacteria is often associated with the structure of lipopolysaccharides, which consist of three regions covalently linked: the glycolipid (lipid a), the oligosaccharide region (core region) and the o-specific polysaccharide ( ... | 2011 | 21920513 |
| aeromonas hydrophila sepsis mimicking vibrio vulnificus infection. | aeromonas hydrophila is a facultatively anaerobic, asporogenous gram-negative rod that has often been regarded as an opportunistic pathogen in hosts with impairment of a local or general defense mechanism. a 68-year-old alcoholic woman presented with shock and gangrene on the right arm. at first, her clinical presentations were severe painful erythematous swelling that worsened within a few hours with development of gangrene, edema, and blisters. bullous fluid and blood cultures yielded a. hydro ... | 2011 | 22028565 |
| polymerase chain reaction-denaturing gradient gel electrophoresis analysis of bacterial community structure in the food, intestines, and feces of earthworms. | the bacterial communities in the food, intestines, and feces of earthworms were investigated by pcr-denaturing gradient gel electrophoresis (dgge). in this study, pcr-dgge was optimized by testing 6 universal primer sets for microbial 16s rrna in 6 pure culture strains of intestinal microbes in earthworms. one primer set effectively amplified 16s rrna from bacterial populations that were found in the food, intestines, and feces of earthworms. compared with the reference markers from the pure cul ... | 2011 | 21887635 |
| Diversity and antibiotic resistance of Aeromonas spp. in drinking and waste water treatment plants. | The taxonomic diversity and antibiotic resistance phenotypes of aeromonads were examined in samples from drinking and waste water treatment plants (surface, ground and disinfected water in a drinking water treatment plant, and raw and treated waste water) and tap water. Bacteria identification and intra-species variation were determined based on the analysis of the 16S rRNA, gyrB and cpn60 gene sequences. Resistance phenotypes were determined using the disc diffusion method. Aeromonas veronii pr ... | 2011 | 21907383 |
| Quality assessment of roof-harvested rainwater in the West Bank, Palestinian Authority. | Rain harvesting is becoming more common in the Palestinian Territories as a result of drinking water scarcity. Although it might pose serious human health risk, this water is being consumed without treatment in many areas of the West Bank. The present study evaluates the physicochemical and microbial quality of harvested rainwater that is used as potable water in the West Bank. Samples from roof-harvested rainwater storage tanks (n = 42) were collected in summer (SS) 2006/winter (WS) 2007. Physi ... | 2011 | 21976199 |
| severe sepsis caused by aeromonas hydrophila in a patient using tocilizumab: a case report. | abstract: | 2011 | 21970314 |
| production of 3-hydroxypropionate homopolymer and poly(3-hydroxypropionate-co-4-hydroxybutyrate) copolymer by recombinant escherichia coli. | conversion of 3-hydroxypropionate (3hp) from 1,3-propanediol (pdo) was improved by expressing dehydratase gene (dhat) and aldehyde dehydrogenase gene (aldd) of pseudomonas putida kt2442 under the promoter of phacab operon from ralstonia eutropha h16. expression of these genes in aeromonas hydrophila 4ak4 produced up to 21 g/l 3hp in a fermentation process. to synthesize homopolymer poly(3-hydroxypropionate) (p3hp), and copolymer poly(3-hydroxypropionate-co-3-hydroxybutyrate) (p3hp4hb), dhat and ... | 2011 | 22024131 |
| Expression of Aeromonas caviae polyhydroxyalkanoate synthase gene in Burkholderia sp. USM (JCM15050) enables the biosynthesis of SCL-MCL PHA from palm oil products. | Aims: Burkholderia sp. USM (JCM15050) isolated from oil-polluted wastewater is capable of utilizing palm oil products and glycerol to synthesize poly(3-hydroxybutyrate) [P(3HB)]. To confer the ability to produce polymer containing 3-hydroxyhexanoate (3HHx), plasmid (pBBREE32d13) harbouring the polyhydroxyalkanoate (PHA) synthase gene of Aeromonas caviae (phaC(Ac) ) was transformed into this strain. Methods and Results: The resulting transformant incorporated approximately 1 ± 0·3 mol% of 3HHx ... | 2012 | 22054430 |
| opportunistic pathogens relative to physicochemical factors in water storage tanks. | household water in oman, as well as in other countries in the region, is stored in tanks placed on house roofs that can be subjected to physicochemical factors which can promote microbial growth, including pathogens and opportunistic pathogens which pose health risks. water samples were collected from 30 houses in a heavily populated suburb of muscat. the tanks used were either glass reinforced plastic (grp), polyethylene or galvanised iron (gi). heterotrophic bacteria, coliforms, faecal colifor ... | 2011 | 21942202 |
| diversity and impact of prokaryotic toxins on aquatic environments: a review. | microorganisms are ubiquitous in all habitats and are recognized by their metabolic versatility and ability to produce many bioactive compounds, including toxins. some of the most common toxins present in water are produced by several cyanobacterial species. as a result, their blooms create major threats to animal and human health, tourism, recreation and aquaculture. quite a few cyanobacterial toxins have been described, including hepatotoxins, neurotoxins, cytotoxins and dermatotoxins. these t ... | 2010 | 22069558 |
| Structural and Functional Analysis of the Serine Protease from Aeromonas sobria. | Aeromonas species are Gram-negative facultative anaerobic bacteria found ubiquitously in a variety of aquatic environments and most commonly implicated as causative agents of gastroenteritis. Sepsis is a fatal complication of Aeromonas infectious diseases, particularly in immune-compromised patients. Two species, Aeromonas hydrophila and Aeromonas sobria, are associated with human disease. Feasible virulence factors of Aeromonas include fimbrial and afimbrial adhesion molecules, hemolysins, ente ... | 2011 | 22129876 |
| recombinant aexu effector protein of aeromonas veronii bv. sobria disrupts the actin cytoskeleton by downregulation of rac1 and induces direct cytotoxicity to β4-integrin expressing cell lines. | aexu is a type three secretion system (ttss) effector of aeromonas hydrophila which has an in vitro adp-ribosyltransferase (art) and gtpase-activating protein (gap) activities on rac1, rhoa and cdc42. here we show that, aexu of aeromonas veronii bv. sobria aeg1 strain disrupts actin cytoskeleton of hela cells during aeg1 infection, aexu transfection or direct application of aexu protein. such cellular disruption was rescued by either inactivation of aexu-gap activity by substitution of arginine ... | 2011 | 21963679 |
| aeromonas diarrhea and behçet's disease: more than a mere association. | | 2011 | 22138675 |
| Bacterial skin flora variation and in vitro inhibitory activity against Saprolegnia parasitica in brown and rainbow trout. | Variations in the number and diversity of bacteria from the skin of brown trout Salmo trutta L. and rainbow trout Oncorhynchus mykiss Walbaum were surveyed from different rivers and fish farms in northern Spain. In addition to determining bacterial populations in skin samples of healthy fish, bacterial populations were determined from skin lesions (of brown trout only) infected with Saprolegnia parasitica, the causal agent of saprolegniosis. Mean bacterial counts from skin lesions of brown trout ... | 2011 | 22013752 |
| [Etiological aspects of acute gastroenteritis--a ten-year review (1.01. 2001-31.12.2010)]. | Acute gastroentritis is one of the most common diseases in humans, and continues to be a significant cause of morbidity worldwide. | 2011 | 22046776 |
| Colonization of turbot tissues by virulent and avirulent Aeromonas salmonicida subsp. salmonicida strains during infection. | Preventing disease outbreaks in cultured turbot Psetta maxima L. caused by Aeromonas salmonicida subsp. salmonicida (ASS) requires a better understanding of how this pathogen colonizes its host. Distribution of 1 virulent and 2 avirulent ASS strains in turbot tissues was investigated during early and late stages of infection following an immersion challenge. To track bacteria within the turbot, the ASS strains were tagged with green fluorescent protein (GFP). Both virulent and avirulent strains ... | 2011 | 21848125 |
| Detection of a unique fibrinolytic enzyme in Aeromonas sp. JH1. | A fibrinolytic enzyme was found in a Gram-negative bacterium, Aeromonas sp. JH1. SDS-PAGE and fibrinzymography showed that it was a 36 kDa, monomeric protein. Of note, the enzyme was highly specific for fibrinogen molecules and the hydrolysis rate of fibrinogen subunits was highest for a, ß, and ? chains in that order. The first 15 amino acids of N-terminal sequence were X-D-A-T-G-P-G-G-N-V-X-T-G-K-Y, which was distinguishable from other fibrinolytic enzymes. The optimum pH and temperature of th ... | 2011 | 22203567 |
| new developments in meat starter cultures. | meat starter cultures containing one or more strains of lactic acid bacteria,actinobacteria, staphylococci,halomonas elongata, aeromonas spec., and moulds or yeasts are widely in practical use. the progress in microbial systematic has led to changes in the taxonomy of familiar bacterial species which are described. studies of flavour genesis led to the identification of the contribution of the enzyme activities endogenously present in the meat matrix as well as of those exerted by the starter cu ... | 1998 | 22060705 |
| Secreted glyceraldehyde-3-phosphate dehydrogenase as a broad spectrum vaccine candidate against microbial infection in aquaculture. | Aims: Subcellullar localizations and cross-immunities of GAPDHs from six common pathogenic bacteria in aquaculture were investigated. Methods and Results: Subcellullar localizations of GAPDHs of Edwardsiella tarda EIB202, Edwardsiella ictaluri ATCC33202, Aeromonas hydrophila LSA34, Vibrio anguillarum MVM425, Vibrio alginolyticus EPGS020401 and Vibrio harveyi VIB647 were analysed with Western blotting, indirect immunofluorescence and flow cytometry examinations. Immunoprotections of different r ... | 2012 | 22017642 |
| identification of bacterial microflora in the midgut of the larvae and adult of wild caught anopheles stephensi: a step toward finding suitable paratransgenesis candidates. | to describe the midgut microbial diversity and to find the candidate bacteria for the genetic manipulation for the generation of paratransgenic anopheline mosquitoes refractory to transmission of malaria, the microbiota of wild larvae and adult anopheles stephensi mosquito midgut from southern iran was studied using a conventional cell-free culture technique and analysis of a 16s ribosomal rna (rrna) gene sequence library. forty species in 12 genera including seven gram-negative myroides, chryse ... | 2012 | 22074685 |
| dose dependence specific and non-specific immune responses of indian major carp (l. rohita ham) to intraperitoneal injection of formalin killed aeromonas hydrophila whole cell vaccine. | specific and non-specific immune response to different doses of formalin killed whole cell vaccine of aeromonas hydrophila to indian major carp (labeo rohita) was evaluated in laboratory condition. three different doses (10(5) cfu/ml, 10(7) cfu/ml, 10(10) cfu/ml) were administered (0.2 ml/fish) intraperitoneally for 1 month. among the three doses, 10(10) cfu/ml elicited the highest antibody and protective response followed by the doses 10(7) cfu/ml and 10(5) cfu/ml. upon challenge with the virul ... | 2011 | 21901335 |
| Molecular detection and cloning of thermostable hemolysin gene from Aeromonas hydrophila. | Aeromonas hydrophila is a major bacterial pathogen associated with hemorrhagic septicemia in aquatic and terrestrial animals including humans. There is an urgent need to develop molecular and immunological assays for rapid, specific and sensitive diagnosis. A new set of primers has been designed for detection of thermostable hemolysin (TH) gene (645 bp) from A. hydrophila, and sensitivity limit for detection of TH gene was 5 pg. The TH gene was cloned, sequenced and analyzed. The G+C content was ... | 2011 | 21954591 |
| long-term trends in the epidemiology and resistance of childhood bacterial enteropathogens in crete. | in this study, we investigated the long-term trends in the epidemiology and susceptibility of bacterial enteropathogens among children in a well-defined area of adequate health standards. the study included all children younger than 14 years of age treated for enteritis at heraklion university general hospital on the island of crete during the 18-year period from january 1993 to december 2010. stool specimens were tested for salmonella, shigella, campylobacter, enteropathogenic escherichia coli ... | 2011 | 22207394 |
| Evaluation of an in vitro cell assay to select attenuated bacterial mutants of Aeromonas hydrophila and Edwardsiella tarda to channel catfish. | To evaluate the feasibility of using an in vitro cell assay to select attenuated bacterial mutants. | 2011 | 21895899 |
| Bdellovibrios, potential biocontrol bacteria against pathogenic Aeromonas hydrophila. | Recent studies have revealed that the use of bdellovibrios is an alternative to control bacteriosis. However, no bdellovibrios are available against Aeromonas hydrophila infections in sturgeons. In the present study, a potential Bdellovibrio strain F16 was isolated from sturgeon gut samples, using a sturgeon-pathogenic A. hydrophila as the prey bacterium. It was initially identified as a Bdellovibrio strain using morphological characteristics and specific PCR amplification, and confirmed to be B ... | 2012 | 21864996 |
| Class 1 Integrons in Aeromonas hydrophila Isolates from Farmed Nile Tilapia (Oreochromis nilotica). | The aim of this study was to determine antimicrobial resistance of Aeromonas hydrophila isolated from farmed Nile Tilapia. A total of 50 A. hydrophila isolates from clinical cases were screened for the presence of class 1, 2 and 3 integrons and all the strains resistant to enrofloxacin and/or ciprofloxacin (n=19) examined for mutation in the quinolone resistance-determining regions (QRDRs) of gyrA and parC. The intI1 gene was detected in 23 A. hydrophila strains (46%) but no intl2 and intl3 were ... | 2011 | 22123307 |
| The Aeromonas dsbA mutation decreased their virulence by triggering type III secretion system but not flagella production. | Pathogenesis of Aeromonas species have been reported to be associated with virulence factors such as lipopolysaccharides (LPS), bacterial toxins, bacterial secretion systems, flagella, and other surface molecules. Dsb (Disulfide bond) proteins play an important role in catalyzing disulfide bond formation in proteins within the periplasmic space. An A. hydrophila dsbA mutant with attenuated virulence using Dictyostelium amoebae as an alternative host model was identified. The attenuated virulence ... | 2012 | 22198000 |
| Discovery of novel biopreservation agents with inhibitory effects on growth of food-borne pathogens and their application to seafood products. | Selection of protective cultures is relevant in order to biopreserve and improve the functional safety of food products, mainly through inhibition of spoilage and/or pathogenic bacteria. Accordingly, the present study investigated potential applications of lactic acid bacteria (LAB) in the biopreservation of fish and shellfish products. For this purpose, a collection of 84 LAB strains isolated from sea bass (Dicentrarchus labrax) and sea bream (Sparus aurata) was identified and characterized for ... | 2011 | 22041547 |
| the structural diversity of carbohydrate antigens of selected gram-negative marine bacteria. | marine microorganisms have evolved for millions of years to survive in the environments characterized by one or more extreme physical or chemical parameters, e.g., high pressure, low temperature or high salinity. marine bacteria have the ability to produce a range of biologically active molecules, such as antibiotics, toxins and antitoxins, antitumor and antimicrobial agents, and as a result, they have been a topic of research interest for many years. among these biologically active molecules, t ... | 2011 | 22073003 |
| In vitro evaluation of antibacterial activity of Asparagopsis taxiformis from the Straits of Messina against pathogens relevant in aquaculture. | Ethanol extracts of Asparagopsis taxiformis collected from the Straits of Messina (Italy) were screened for antibacterial activity against pathogenic shellfish and fish bacteria previously isolated from local marine and brackish environments. Genetic labelling by DNA barcoding allowed us to identify the algal population as a biogeographical strain conspecific to A. taxiformis. The extract obtained in May showed the broadest antibacterial activity against all tested pathogenic bacteria, especiall ... | 2012 | 22078751 |
| Development and validation of an HPLC-based screening method to acquire polyhydroxyalkanoate synthase mutants with altered substrate specificity. | A rapid and convenient method for the compositional analysis of polyhydroxyalkanoate (PHA) was developed using high-performance liquid chromatography (HPLC) and alkaline sample pretreatment in a 96-well plate format. The reliability of this system was confirmed by the fact that a mutant with a D171G mutation of Aeromonas caviae PHA synthase (PhaC(Ac)), which gained higher reactivity toward 3-hydroxyhexanoate (3HHx), was selected from the D171X mutant library. Together with D171G mutant, several ... | 2011 | 22088761 |
| bacterial aetiology of diarrhoeal diseases and antimicrobial resistance in dhaka, bangladesh, 2005-2008. | summaryinfectious diarrhoea caused by bacterial pathogens contributes to the high level of mortality in developing countries like bangladesh. following standard bacteriological procedures, a total of 14 428 bacterial pathogens were isolated from 56 132 stool samples and rectal swabs collected from diarrhoeal patients between 2005 and 2008. the rate of isolation and antimicrobial susceptibility data were retrospectively analysed for these isolates and among them vibrio spp. (42·9%) were the most ... | 2011 | 22040529 |