| antimicrobial triterpenes from the stem bark of crossopteryx febrifuga. | phytochemical investigation of the stem bark extract of crossopteryx febrifuga resulted in the isolation of epimeric mixtures of 3β-urs-12,20(30)-diene-27,28-dioic acid and 18-epi-3β-urs-12,20(30)-diene-27,28-dioic acid (1), as well as: 3β-d-glucopyranosylurs-12,20(30)-diene-27,28-dioic acid and 18-epi-3β-d-glucopyranosylurs-12,20(30)-diene-27,28-dioic acid (2), together with some known compounds such as the monoglyceride of palmitic acid, as well as β-sitosterol and its glucoside. the structure ... | 2015 | 26352201 |
| 2-alkyl(aryl)-quinazolin-4(3h)-thiones, 2-r-(quinazolin-4(3h)-ylthio)carboxylic acids and amides: synthesis, molecular docking, antimicrobial and anticancer properties. | in this study, a series of novel 2-alkyl(aryl)-quinazolin-4(3h)-thiones, 2-r-(quinazolin-4(3h)-ylthio)carboxylic acids and amides were synthesized and evaluated for antimicrobial and anticancer activities. their structure was confirmed by elemental analysis and spectral data (ft-ir, lc-ms, (1)h-nmr). antimicrobial activity was tested in vitro against staphylococcus aureus, enterococcus faecalis, enterobacter aerogenes, pseudomonas aeruginosa, escherichia coli, klebsiella pneumonia, candida albic ... | 2016 | 25831026 |
| chemical composition and antimicrobial evaluation of the essential oils of bocageopsis pleiosperma maas. | essential oils from the leaves, twigs and barks of bocageopsis pleiosperma maas were obtained by using hydrodistillation and analysed by using gas chromatography coupled to mass spectrometry. several compounds (51) were detected and identified, being β-bisabolene the main component in all aerial parts of the plant, with higher concentration in the leaves (55.77%), followed by barks (38.53%) and twigs (34.37%). in order to increase the biological knowledge about the essential oil of bocageopsis s ... | 2015 | 25562370 |
| the preliminary assessment of anti-microbial activity of hplc separated components of kirkia wilmsii. | most communities in developing countries rely on traditional medicines for the treatment of diseases. in south africa, the limpopo province, within the lebowakgomo district, uses tuberous roots of kirkia wilmsii, after infusion in water for the treatment of a wide range of diseases by sotho communities. | 2014 | 25371593 |
| screening and characterisation of antimicrobial properties of semisynthetic betulin derivatives. | betulin (lup-20(29)-ene-3β, 28-diol) is a naturally occurring triterpene, which is found in substantial amounts from the outer bark of birch trees. a library of 51 structurally diverse semisynthetic betulin derivatives was screened against five bacterial strains, enterobacter aerogenes, escherichia coli, enterococcus faecalis, pseudomonas aeruginosa, staphylococcus aureus and a fungal strain candida albicans, using broth microdilution assays. primary antimicrobial screening at 50 µm concentratio ... | 2014 | 25032708 |
| the presence of antibiotic-resistant nosocomial pathogens in endotracheal tube biofilms and corresponding surveillance cultures. | mechanically ventilated patients often develop ventilator-associated pneumonia (vap). soon after intubation, a mixed biofilm harboring microbial pathogens is formed on the endotracheal tube (et). it is believed that this biofilm contributes to the development of vap. unfortunately, the causative agent is often not known at the time vap is suspected, and early therapy often relies on the identification of surveillance cultures (sc). it is thus important to know whether these sc can predict the mi ... | 2013 | 24115610 |
| antimicrobial ergosteroids and pyrrole derivatives from halotolerant aspergillus flocculosus pt05-1 cultured in a hypersaline medium. | in order to obtain more structurally novel and bioactive lead compounds for subsequent drug discovery, we have shifted the focus of our study from traditional microbial resources to 'extremophiles'. in this study, a halotolerant fungus aspergillus flocculosus pt05-1 was isolated from the sediment of putian saltern of fujian province of china in a hypersaline medium. two new compounds, (22r,23s)-epoxy-3β,11α,14β,16β-tetrahydroxyergosta-5,7-dien-12-one (1) and 6-(1h-pyrrol-2-yl)hexa-1,3,5-trienyl- ... | 2013 | 24030481 |
| purpurides b and c, two new sesquiterpene esters from the aciduric fungus penicillium purpurogenum js03-21. | purpurides b and c (1 and 2, resp.), two new sesquiterpene alcohol esters generated from a drimane-type sesquiterpenoid lactone and an amino acid, together with two known analogs, berkedrimane b (3) and purpuride (4), were isolated from the aciduric fungus penicillium purpurogenum js03-21. their structures were elucidated by spectroscopic analysis, x-ray single-crystal diffraction, and application of marfey's method. compounds 1-4 showed modest antifungal activities against candida albicans with ... | 2013 | 23847064 |
| urinary tract infection among symptomatic outpatients visiting a tertiary hospital based in midwestern nigeria. | microbial pathogens implicated in urinary tract infection and their antibiotic susceptibility patterns as prevalent in uti symptomatic outpatients resident in benin city, nigeria was the focus of this study. one hundred (100) midstream urine samples were collected into sterile plastic universal bottles from outpatients who visited the university of benin teaching hospital, nigeria and who were tentatively diagnosed as manifesting symptoms of uti. patients were referred to the medical microbiolog ... | 2013 | 23445708 |
| new pyran-2-ones from alkalophilic actinomycete, nocardiopsis alkaliphila sp. nov. yim-80379. | two new pyran-2-ones, nocardiopyrones a and b (1 and 2, resp.), along with four known compounds, pyridinols 3-5, and 1-acetyl-β-carboline (6) were isolated from the alkalophilic actinomycete nocardiopsis alkaliphila sp. nov. yim-80379. their structures were established on the basis of spectroscopic analysis, cd spectra, and the quantum-chemical ecd calculation. pyridinols 3-5 were isolated from a natural source for the first time. compounds 1 and 2 showed weak antibacterial activities against ps ... | 2013 | 23418175 |
| comparative anti - microbial evaluation studies of the extracts and isolates of leaves & bark of wrightia tomentosa. | the butanol and ethanol extract of the leaves and bark of wrightia tomentosa along with its seven pure component isolates (blf(28), blf(29*), bbf(29), elf(3), elf7, elf(17*), ebf(7) ) after fractionation by column chromatography were evaluated for antimicrobial activity against gram positive (s. aureus, s. fecalis, s.albus and b.subtilis) and gram negative (escherichia coli, pseudomonas aeruginosa, proteus vulgaris & klebsiella aerogenes) bacteria and the fungi candida albicans by disc diffusion ... | 2006 | 22557219 |
| prevalence, antibiotic susceptibility and characterization of antibiotic resistant genes among carbapenem-resistant gram-negative bacilli and yeast in intestinal flora of cancer patients in north lebanon. | the emergence and spread of carbapenem-resistant bacteria are a significant clinical and public health concern. the aim of the study is to determine the prevalence of intestinal carriage of carbapenem-resistant bacteria and yeasts in cancer patients under chemotherapy. 41 stool samples collected from cancer patients in nini hospital in tripoli, north lebanon have been analyzed. after isolating yeasts and carbapenem-resistant bacteria, a biochemical identification and antimicrobial susceptibility ... | 2017 | 28216021 |
| identification and inhibition of histamine-forming bacteria in blue scad (decapterus maruadsi) and chub mackerel (scomber japonicus). | in this study, we investigated the differences in histamine accumulation between blue scad and chub mackerel and methods of inhibiting histamine-forming bacteria and controlling histamine accumulation in fish. the free histidine contents in blue scad and chub mackerel were 1.45 and 2.75 mg/g, respectively. the histamine-forming bacteria isolated from them were identified as citrobacter freundii, citrobacter braakii, and enterobacter aerogenes using 16s rdna sequence analysis, the vitek 2 compact ... | 2015 | 25710155 |
| ndm-producing enterobacteriaceae in a chinese hospital, 2014-2015: identification of ndm-producing citrobacterwerkmanii and acquisition of blandm-1-carrying plasmid in vivo in a clinical escherichia coli isolate. | new delhi metallo-β-lactamase (ndm)-producing enterobacteriaceae (npe) shows prevalence in china. little is known about the mechanisms related to the spread of npe. recently, a total of 51 non-duplicated npe isolates were collected from a tertiary-care hospital in china and analysed for genetic relatedness by pfge, antimicrobial susceptibility by etest and sequence type by multilocus sequence typing. s1-pfge and southern blot analysis or pcr amplification were used for plasmid profiling. between ... | 2016 | 27667823 |
| mobilization of the salmonella genomic island sgi1 and the proteus genomic island pgi1 by the a/c2 plasmid carrying blatem-24 harboured by various clinical species of enterobacteriaceae. | the objective of this study was to transfer the salmonella genomic islands (gis) sgi1 and sgi1-v and the proteus gi pgi1-pmesc to clinical isolates of enterobacteriaceae harbouring an a/c2 plasmid. | 2016 | 27150396 |
| dissemination of the blakpc gene by clonal spread and horizontal gene transfer: comparative study of incidence and molecular mechanisms. | in addition to the global spread of the kpc-producing klebsiella pneumoniae (kpc-kp) clonal complex (cc)-258 clone, the blakpc gene may also spread by horizontal gene transfer (hgt), as suspected when more than one kpc-producing enterobacteriaceae (kpc-ent) species are isolated in a single patient. we aimed to characterize the incidence and molecular features of kpc-kp that were isolated alone (singular kpc-kp) versus kpc-kp that were isolated together with another kpc-ent species (joint kpc-kp) ... | 2016 | 27073266 |
| prevalence of multidrug resistant uropathogenic bacteria in pediatric patients of a tertiary care hospital in eastern india. | today, because systemic infections such as urinary tract infection (uti) affect even pediatric patients, antibiotic resistant bacteria have become a constant clinical challenge. in the present study, a total of 1054 urine samples were collected from pediatric patients over 18 months. from these samples, 510 isolates of pathogenic bacteria were collected using hicrome uti agar. antibiotic sensitivity tests of isolates were performed using the kirby-bauer method. two gram-positive bacteria (entero ... | 2017 | 26617250 |
| casque infection, resolution, and subsequent repneumatization in a trumpeter hornbill (bycanistes buccinator). | | 2015 | 25909990 |
| fast and continuous microorganism detection using aptamer-conjugated fluorescent nanoparticles on an optofluidic platform. | fast and accurate pathogen detection in aquatic environments is challenging in many biomedical studies and microbial diagnostic applications. in this study, we developed a real-time, continuous, and non-destructive single cell detection method using target specific aptamer-conjugated fluorescent nanoparticles (a-fnps) and an optofluidic particle-sensor platform. a-fnps selectively bound to the surfaces of target bacteria (escherichia coli) and labeled them with high affinity and selectivity so t ... | 2015 | 25190089 |
| in vitro susceptibility and distribution of beta-lactamases in enterobacteriaceae causing intra-abdominal infections in north america 2010-2011. | the study for monitoring antimicrobial resistance trends has been monitoring the activity of antimicrobials indicated for the treatment of intra-abdominal infections since 2004. this report documents the in vitro activity of several recommended antimicrobials against 3449 gram-negative bacilli isolated from the 30 and 25 participating sites in north america in 2010-2011, respectively, and characterizes the extended-spectrum beta-lactamases (esbl) identified in esbl-positive and ertapenem-non-sus ... | 2014 | 24813688 |
| characterization of kpc-2-producing escherichia coli, citrobacter freundii, enterobacter cloacae, enterobacter aerogenes, and klebsiella oxytoca isolates from a chinese hospital. | twelve nonduplicated kpc-2-producing enterobacterial isolates, including three escherichia coli, two citrobacter freundii, two enterobacter cloacae, four enterobacter aerogenes, and one klebsiella oxytoca, were collected from various clinical samples within 18 months (march 2011 to september 2012). two of the 12 patients died from infections caused by kpc-2-producing pathogens, while the rest of the patients with kpc-2-producing pathogens improved or were cured. the majority of the clinical isol ... | 2014 | 24433026 |
| isolation and characterization of dna aptamers against escherichia coli using a bacterial cell-systematic evolution of ligands by exponential enrichment approach. | aptamers are powerful capturing probes against various targets such as proteins, small organic compounds, metal ions, and even cells. in this study, we isolated and characterized single-stranded dna (ssdna) aptamers against escherichia coli. a total of 28 ssdnas were isolated after 10 rounds of selection using a bacterial cell-selex (systematic evolution of ligands by exponential enrichment) process. other bacterial species (klebsiella pneumoniae, citrobacter freundii, enterobacter aerogenes, an ... | 2013 | 23357235 |
| in vitro susceptibilities of clinical isolates of ertapenem-non-susceptible enterobacteriaceae to cefotaxime, ceftazidime, cefepime and aztreonam. | to investigate the in vitro susceptibility of ertapenem-non-susceptible enterobacteriaceae (ense) isolates to cefotaxime, ceftazidime, cefepime and aztreonam. | 2012 | 22345386 |
| restrictive reporting of selected antimicrobial susceptibilities influences clinical prescribing. | cascade and restrictive reporting are useful strategies to enhance antibiotic stewardship programs. | 2016 | 25466592 |
| biohydrogen production by co-fermentation of crude glycerol and apple pomace hydrolysate using co-culture of enterobacter aerogenes and clostridium butyricum. | co-substrate utilization of various wastes with complementary characteristics can provide a complete medium for higher hydrogen production. this study evaluated potential of apple pomace hydrolysate (aph) co-fermented with crude glycerol (cg) for increased h2 production and decreased by-products formation. the central composite design (ccd) along with response surface methodology (rsm) was used as tool for optimization and 15 g/l of cg, 5 g/l of aph and 15% (v/v) inoculum were found to be optimu ... | 2015 | 26142996 |
| migration of dictyostelium discoideum to the chemoattractant folic acid. | dictyostelium discoideum can be grown axenically in a cultured media or in the presence of a natural food source, such as the bacterium klebsiella aerogenes (ka). here we describe the advantages and methods for growing d. discoideum on a bacterial lawn for several processes studied using this model system. when grown on a bacterial lawn, d. discoideum show positive chemotaxis towards folic acid (fa). while these vegetative cells are highly unpolarized, it has been shown that the signaling and cy ... | 2016 | 27271892 |
| preliminary feasibility and modelling of a liquid matrix dictyostelium discoideum virulence assay for pseudomonas aeruginosa. | to develop and determine the feasibility of using a liquid matrix adaptation of the dictyostelium discoideum bacterial virulence assay by testing on well-characterised clinical and environmental isolates of pseudomonas aeruginosa. | 2016 | 27181169 |
| dictyostelium discoideum as a surrogate host-microbe model for antivirulence screening in pseudomonas aeruginosa pao1. | the interest of the pharmaceutical industry in developing new antibiotics is decreasing, as established screening systems which identify compounds that kill or inhibit the growth of bacteria can no longer be used. consequently, antimicrobial screening using classical minimum inhibitory concentration (mic) measurements is becoming obsolete. the discovery of antimicrobial agents that specifically target a bacterial pathogen without affecting the host and its beneficial bacteria is a promising stra ... | 2016 | 27066943 |
| infected hydatid cysts bacteria in slaughtered livestock and their effects on protoscoleces degeneration. | the protoscoleces of fertile hydatid cysts are considered as major risks in surgery and producing secondary cysts if rupture the cyst during operation and, cause infecting the dogs with adult worm if eaten by this animal. bacterial infection of the hydatid fluid can lead to sterilization of the cyst. | 2014 | 25371792 |
| carbapenemase-producing enterobacteriaceae in a tertiary hospital in madrid, spain: high percentage of colistin resistance among vim-1-producing klebsiella pneumoniae st11 isolates. | here we describe the carbapenemase genes, genetic relatedness and antimicrobial susceptibility data of 123 carbapenemase-producing enterobacteriaceae (cpe) clinical isolates recovered from 2010 to 2012, comprising klebsiella pneumoniae (n = 79), klebsiella oxytoca (n = 13), serratia marcescens (n = 14), enterobacter cloacae (n = 12), enterobacter asburiae (n = 4) and enterobacter aerogenes (n = 1). vim-1 was the most common carbapenemase (n = 101) followed by kpc-2 (n = 19), oxa-48 (n = 2) and i ... | 2014 | 24657043 |
| molecular identification of aiia homologous gene from endophytic enterobacter species and in silico analysis of putative tertiary structure of ahl-lactonase. | the aiia homologous gene known to encode ahl- lactonase enzyme which hydrolyze the n-acylhomoserine lactone (ahl) quorum sensing signaling molecules produced by gram negative bacteria. in this study, the degradation of ahl molecules was determined by cell-free lysate of endophytic enterobacter species. the percentage of quorum quenching was confirmed and quantified by hplc method (p<0.0001). amplification and sequence blast analysis showed the presence of aiia homologous gene in endophytic enter ... | 2014 | 24309109 |
| spread of an ompk36-modified st15 klebsiella pneumoniae variant during an outbreak involving multiple carbapenem-resistant enterobacteriaceae species and clones. | we aim to characterise multiple ertapenem-resistant (ert-r, n = 15) enterobacteriaceae isolates identified as presumptive carbapenemase producers in a portuguese hospital in a short period of time (march-july 2010). antibiotic susceptibility patterns, β-lactamases, genetic relatedness [pulsed-field gel electrophoresis (pfge), multi-locus sequence typing (mlst)], plasmid content and major enterobacterial porins were investigated. ertapenem resistance was associated with deficiencies in major pori ... | 2012 | 22706513 |
| isolation and characterization of plant growth promoting bacteria from non-rhizospheric soil and their effect on cowpea (vigna unguiculata (l.) walp.) seedling growth. | the efficacy of four potential phosphate solubilizing enterobacter isolated from non-rhizospheric soil in western ghat forest in india. plant growth promoting ability of these isolates was evaluated in cowpea. all are gram negative, rod shaped, 0.8-1.6 mm in size, and psychrotrophic in nature, grow from 5 to 40°c (optimum temp. 28 ± 2°c). all isolates exhibits growth at a wide range of ph 6-12, optimum at ph 7.0 and tolerates up to 7% (w/v) salt concentration. 16s rrna gene sequencing reveals th ... | 2010 | 24026928 |
| high prevalence of non-clonal imipenem-nonsusceptible enterobacter spp. isolates in korea and their association with porin down-regulation. | we investigated the prevalence and clonal distribution of imipenem-nonsusceptible enterobacter clinical isolates from hospitals in korea and the contributions of various mechanisms to imipenem nonsusceptibility. the in vitro antimicrobial susceptibility to imipenem of 357 non-duplicated enterobacter isolates obtained from eight geographically distant tertiary care hospitals in korea was evaluated. imipenem-nonsusceptible enterobacter isolates were genotyped. additionally, β-lactamase genes were ... | 2017 | 28336135 |
| molecular epidemiology of carbapenemase-producing enterobacteriaceae in a primary care hospital in japan, 2010-2013. | recently, carbapenemase-producing enterobacteriaceae (cpe) have been spreading worldwide and have become a threat in healthcare systems. we investigated the isolation frequency and molecular epidemiological characteristics of cpe isolated from clinical samples collected at a primary care hospital over the four years of 2010-2013 in japan. cpe were detected in 17 (0.34%) of 4875 isolates by the broth microdilution method, sodium mercaptoacetate inhibition test, and modified hodge test using merop ... | 2017 | 28161293 |
| prevalence, risk factors, outcomes, and molecular epidemiology of mcr-1-positive enterobacteriaceae in patients and healthy adults from china: an epidemiological and clinical study. | the mcr-1 gene confers transferable colistin resistance. mcr-1-positive enterobacteriaceae (mcrpe) have attracted substantial medical, media, and political attention; however, so far studies have not addressed their clinical impact. herein, we report the prevalence of mcrpe in human infections and carriage, clinical associations of mcr-1-positive escherichia coli (mcrpec) infection, and risk factors for mcrpec carriage. | 2017 | 28139431 |
| in vitro susceptibility to 19 agents other than β-lactams among third-generation cephalosporin-resistant enterobacteriaceae recovered on hospital admission. | as part of the multicentre antibiotic therapy optimisation study, mic values of 19 non-β-lactam agents were determined for third-generation cephalosporin-resistant escherichia coli, klebsiella species and enterobacter species (3gcreb) isolates collected in german hospitals. | 2017 | 28108677 |
| clonal spread and accumulation of β-lactam resistance determinants in enterobacter aerogenes and enterobacter cloacae complex isolates from infection and colonization in patients at a public hospital in recife, pernambuco, brazil. | enterobacter aerogenes and enterobacter cloacae complex are the two species of this genus most involved in healthcare-associated infections that are esbl and carbapenemase producers. this study characterized, phenotypically and genotypically, 51 isolates of e. aerogenes and e. cloacae complex originating from infection or colonization in patients admitted to a public hospital in recife, pernambuco, brazil, by antimicrobial susceptibility profile, analysis of β-lactamase genes (blatem, blashv, bl ... | 2017 | 27902398 |
| the differential importance of mutations within ampd in cephalosporin resistance of enterobacter aerogenes and enterobacter cloacae. | mechanisms leading to carbapenem and cephalosporin resistance were sought in enterobacter aerogenes isolates that were highly resistant to carbapenems but had no known carbapenemase. results were compared with recent work examining carbapenem-resistant enterobacter cloacae. eighteen carbapenem-resistant e. aerogenes were screened for known β-lactamase and carbapenemase genes, and novel carbapenemases were sought in whole-genome sequencing (wgs) data of the three most resistant isolates. for all ... | 2016 | 27665520 |
| antibacterial activities of the methanol extracts, fractions and compounds from harungana madagascariensis lam. ex poir. (hypericaceae). | harungana madagascariensis lam. ex poir. (hypericaceae) is used in folk medicine to treat a variety of human ailments, mainly antibacterial, antifungal, antiviral and viral infections. in the present study, the methanol extract from the leaves (hml) and bark (hmb) of this plant as well as fractions (hmba-c), sub-fractions (hmba1-5) and compounds isolated from hmba and hmbb namely betulinic acid (1), madagascin (2), ferruginin a (3) and kaempferol-3-o-β-d-glucopyranoside (4) were tested for their ... | 2016 | 27267830 |
| [distribution and drug sensitivity test of bacteria of patients on chronic rhinosinusitis with or without nasal polyps]. | to study the distribution and drug sensitivity test of bacteria of patients on chronic rhinosinusitis with or without nasal polyps. | 2016 | 27192905 |
| sonication of abdominal drains: clinical implications of quantitative cultures for the diagnosis of surgical site infection. | the use of drains in patients undergoing abdominal surgery has been a subject of debate for several decades. in this paper, the usefulness of quantitative cultures of sonicated abdominal drains for diagnosing surgical site of infection (ssi) and the association between culture results with patient outcome is evaluated. | 2016 | 27046739 |
| epidemiology of carbapenem-resistant enterobacteriaceae in 7 us communities, 2012-2013. | carbapenem-resistant enterobacteriaceae (cre) are increasingly reported worldwide as a cause of infections with high-mortality rates. assessment of the us epidemiology of cre is needed to inform national prevention efforts. | 2015 | 26436831 |
| activity of temocillin, mecillinam, ceftazidime, and ceftazidime/avibactam against carbapenem-non-susceptible enterobacteriaceae without carbapenemase production. | treatment options for multidrug-resistant gram-negative infections are scarce and therefore alternatives with a narrow spectrum or new agents are sought. antimicrobial susceptibility to temocillin, mecillinam, ceftazidime, and ceftazidime/avibactam was determined using etest and disk diffusion according to european committee on antimicrobial susceptibility testing (eucast) methodology. a total of 77 carbapenem-nonsusceptible enterobacteriaceae were studied, including klebsiella pneumoniae (26%), ... | 2015 | 26433746 |
| molecular epidemiology of kpc-2-producing enterobacteriaceae (non-klebsiella pneumoniae) isolated from brazil. | in brazil, since 2009, there has been an ever increasing widespread of the bla(kpc-2) gene, mainly in klebsiella pneumoniae. this study aims to assess the molecular epidemiology and genetic background of this gene in enterobacteriaceae (non-k. pneumoniae) species from 9 brazilian states between 2009 and 2011. three hundred eighty-seven isolates were analyzed exhibiting nonsusceptibility to carbapenems, in which the bla(kpc-2) gene was detected in 21.4%. by disk diffusion and e-test, these isolat ... | 2015 | 25935630 |
| incidence rates of carbapenemase-producing enterobacteriaceae clinical isolates in france: a prospective nationwide study in 2011-12. | to determine proportions and incidence rates of enterobacteriaceae producing carbapenemase among those non-susceptible (ns) to carbapenems in france. | 2014 | 24942333 |
| epidemiology and molecular characterization of extended-spectrum beta-lactamase-producing enterobacter spp., pantoea agglomerans, and serratia marcescens isolates from a bulgarian hospital. | forty-two extended-spectrum beta-lactamase (esbl)-producing isolates of enterobacter aerogenes, enterobacter cloacae, pantoea agglomerans, and serratia marcescens, collected consecutively during the period january-november 2011 from the university hospital in varna, bulgaria, were studied to characterize their esbls by isoelectric focusing, group-specific pcr, and sequencing. the epidemiological relationship was evaluated by random amplified polymorphic dna analysis (rapd). transferability of es ... | 2014 | 24171449 |
| avibactam reverts the ceftazidime mic90 of european gram-negative bacterial clinical isolates to the epidemiological cut-off value. | ceftazidime-avibactam consists of the beta-lactam ceftazidime and the novel non-beta-lactam beta-lactamase inhibitor avibactam. the effect of avibactam on the ceftazidime mic frequency distribution of gram-negative european clinical isolates was observed and compared to european committee for antimicrobial susceptibility testing (eucast) mic frequency distributions and epidemiological cut-off values (ecoffs) listed for ceftazidime. | 2014 | 24125508 |
| culture proven newborn sepsis with a special emphasis on late onset sepsis caused by enterobacteriaceae in a level iii neonatal care unit in astana, kazakhstan. | newborn sepsis is one of the major public health concerns worldwide. also in our neonatal care unit, it is one of the major problems and especially infections with enterobacteriaceae were noted to pose an increasing problem in the last years. | 2013 | 23975158 |
| emergence of extended-spectrum β-lactamase producing enterobacter spp. in patients with bacteremia in a tertiary hospital in southern brazil. | extended-spectrum β-lactamases (esbls) are increasingly prevalent in enterobacter spp., posing a challenge to the treatment of infections caused by this microorganism. the purpose of this retrospective study was to evaluate the prevalence, risk factors, and clinical outcomes of inpatients with bacteremia caused by esbl and non esbl-producing enterobacter spp. in a tertiary hospital over the period 2004-2008. | 2014 | 23587705 |
| genetic characterization of tigecycline resistance in clinical isolates of enterobacter cloacae and enterobacter aerogenes. | the intrinsically encoded rama gene has been linked to tigecycline resistance through the up-regulation of efflux pump acrab in enterobacter cloacae. the molecular basis for increased rama expression in e. cloacae and enterobacter aerogenes, as well as the role of arac regulator rara, has not yet been shown. to ascertain the intrinsic molecular mechanism(s) involved in tigecycline resistance in enterobacter spp., we analysed the expression levels of rama and rara and corresponding efflux pump ge ... | 2013 | 23349441 |
| in vitro susceptibility of multidrug-resistant enterobacteriaceae clinical isolates to tigecycline. | to assess the in vitro susceptibility of multidrug-resistant enterobacteriaceae (mdre) isolates to tigecycline. | 2012 | 22833638 |
| class 1 integron gene cassettes in multidrug-resistant gram-negative bacteria in southern china. | non-duplicate multidrug-resistant gram-negative bacteria (n=1447) isolated from january 2008 to december 2009 were investigated for the presence of integrons as well as characterisation of gene cassettes. among 825 strains carrying the class 1 integrase gene inti1, 461 gene cassette-positive isolates were found. thirty-eight distinct gene cassette arrays were identified by restriction fragment length polymorphism (rflp) and dna sequencing analyses. in addition, several novel gene cassette arrays ... | 2012 | 22817917 |
| microbiologic analyses of patients before and after liver transplant. | the aim of this study was to analyze microbiologic screening results of patients before and after liver transplant. | 2015 | 26640931 |
| activity of fosfomycin and comparison of several susceptibility testing methods against contemporary urine isolates. | fosfomycin is recommended as first-line treatment for acute uncomplicated cystitis in women. it has demonstrated in vitro activity against a variety of pathogens; however, a paucity of data are available from the usa. we determined the susceptibility of a collection of urine isolates to fosfomycin and compared multiple methods of susceptibility testing. consecutive non-duplicate enterobacteriaceae, enterococci and pseudomonas aeruginosa isolates were collected from the clinical microbiology labo ... | 2015 | 26498988 |
| health evaluation and survey of zoonotic pathogens in free-ranging capybaras (hydrochoerus hydrochaeris). | capybaras (hydrochoerus hydrochaeris) are the world's largest rodents and play an epidemiologic role in the transmission of zoonotic pathogens, including the causative agents of brazilian spotted fever, leptospirosis, and others. we surveyed the health of 31 free-ranging capybaras at the alberto löfgren state park, são paulo, brazil using a variety of diagnostic methods. hematology and serum chemistry were consistent with mild malnutrition and parasitism but did not indicate severe physiologic i ... | 2014 | 24779462 |
| surveillance of omadacycline activity tested against clinical isolates from a global (north america, europe, latin america and asia-western pacific) collection (2010-2011). | omadacycline is a broad spectrum aminomethylcycline in late-stage clinical development for acute bacterial skin and skin structure infections and community-acquired pneumonia as both an oral and intravenous, once-daily formulation. in this report omadacycline and comparators were tested against 69,246 non-duplicate bacterial isolates collected prospectively during 2010 and 2011 from medical centers in asia-pacific (11,397 isolates), europe (23,490 isolates), latin america (8,038 isolates) and no ... | 2017 | 28223386 |
| effect of intermittent aeration on microbial diversity in an intermittently aerated ifas reactor treating municipal wastewater: a field study. | in the present study, the effect of three intermittent aeration (ia) cycles on treatment performance and microbial diversity was investigated in an integrated fixed film activated sludge (ifas) reactor treating municipal wastewater. the results showed that ia strategies were able to achieve efficient removal of organics and nitrogen ranging between 90 and 95% and 70 and 80%, respectively, however the phosphorus removal was found to be inversely proportional to the duration of aeration off time i ... | 2017 | 28095182 |
| antioxidant, anticholinesterase and antibacterial activities of stachys guyoniana and mentha aquatica. | stachys guyoniana noë ex. batt. and mentha aquatica l. are two algerian lamiaceae used in folk medicine. | 2017 | 27927090 |
| occurrence of blastocystis sp. in water catchments at malay villages and aboriginal settlement during wet and dry seasons in peninsular malaysia. | in the tropics, there are too few studies on isolation of blastocystis sp. subtypes from water sources; in addition, there is also an absence of reported studies on the occurrence of blastocystis sp. subtypes in water during different seasons. therefore, this study was aimed to determine the occurrence of blastocystis sp. subtypes in river water and other water sources that drained aboriginal vicinity of highly endemic intestinal parasitic infections during wet and dry seasons. water samples wer ... | 2016 | 27761331 |
| cockroaches (blattodea: blattidae): a reservoir of pathogenic microbes in human-dwelling localities in lahore. | this study focuses on isolation of pathogenic bacteria from external and internal surfaces of cockroaches collected from houses and hospitals in lahore. in total, 240 adult cockroaches were collected from houses and hospitals by hand or using sticky traps and food-bait traps. cockroach species were identified, and microbial screening was done for external surfaces and gut tracts of cockroaches. jaccard's index of similarity, bray-curtis' index of dissimilarity, and shannon-wiener's diversity ind ... | 2016 | 27744361 |
| characterization and evaluation of antibacterial and antiproliferative activities of crude protein extracts isolated from the seed of ricinus communis in bangladesh. | ricinus communis (euphorbiaceae) has previously been reported to possess analgesic, antihistamine, antioxidant and anti-inflammatory activities. this study was designed for isolation, characterization and evaluation of antibacterial and anti-proliferative activities of r. communis seed protein. | 2016 | 27405609 |
| synthesis, base pairing and structure studies of geranylated rna. | natural rnas utilize extensive chemical modifications to diversify their structures and functions. 2-thiouridine geranylation is a special hydrophobic trna modification that has been discovered very recently in several bacteria, such as escherichia coli, enterobacter aerogenes, pseudomonas aeruginosa and salmonella typhimurium the geranylated residues are located in the first anticodon position of trnas specific for lysine, glutamine and glutamic acid. this big hydrophobic terpene functional gro ... | 2016 | 27307604 |
| influence of nanomechanical stress induced by zno nanoparticles of different shapes on the viability of cells. | there is growing interest in nanostructures interacting with living organisms. however, there are still no general rules for the design of biocompatible nanodevices. here, we present a step towards understanding the interactions between nanostructures and living cells. we study the influence of nanomechanical stress induced by zinc oxide (zno) nanostructures of different shapes on the viability of both prokaryotic (gram-negative bacteria: escherichia coli and enterobacter aerogenes, and gram-pos ... | 2016 | 27074722 |
| characterization of a novel qepa3 variant in enterobacter aerogenes. | five isolates harboring qepa were studied by polymerase chain reaction (pcr) amplification and relevant methods. one was determined to be a novel qepa3 from enterobacter aerogenes, and four involved three qepa1 and one qepa2 determinants from escherichia coli; the qepa3 changed five amino acids. these results characterized genetic structures a, b, c, d, and e. | 2016 | 26947590 |
| evaluation of groundwater quality in a rural community in north central of nigeria. | evaluation of water quality of nine boreholes and three open hand-dug wells in a rural community in north central nigeria revealed relative abundance of cations na > k > ca > mg > zn > pb and anions cl(-) > po4(2-) > so4(2-) > no3(-) in the boreholes and cations ca > na > k > mg > pb and anions no3(-) > po4(2-) > so4(2-) > cl(-) in the wells. the major contaminants exceeding son and who permissible limits were no3(-) , mg, th, ph and mg, pb, th, ph and do in the wells and boreholes, respective ... | 2016 | 26915740 |
| antibacterial and antiinflammatory properties of bovine colostrum. | immunity related disorder is one of the leading causes of disease in the world. oxidative stress and microbial infections play a major role in inflammation-induced diseases. bovine colostrum (bc) contains immunoglobulins and lactoferrins which help in building the immunity and protect against the bacterial proliferation and growth. | 2016 | 26899853 |
| in vitro antibacterial activities of p-toluenesulfonyl-hydrazinothiazoles and hydrazinoselenazoles against multi-drug resistant gram-negative phenotypes. | bacterial multidrug resistance (mdr) constitutes a major hurdle in the treatment of infectious diseases worldwide. the present study was designed to evaluate the antibacterial activities of synthetic p-toluenesulfonyl-hydrazinothiazoles against multidrug resistant gram-negative bacteria. | 2016 | 26782344 |
| human gut bacteria are sensitive to melatonin and express endogenous circadian rhythmicity. | circadian rhythms are fundamental properties of most eukaryotes, but evidence of biological clocks that drive these rhythms in prokaryotes has been restricted to cyanobacteria. in vertebrates, the gastrointestinal system expresses circadian patterns of gene expression, motility and secretion in vivo and in vitro, and recent studies suggest that the enteric microbiome is regulated by the host's circadian clock. however, it is not clear how the host's clock regulates the microbiome. here, we demon ... | 2016 | 26751389 |
| role of the outer membrane and porins in susceptibility of β-lactamase-producing enterobacteriaceae to ceftazidime-avibactam. | this study examined the activity of the novel antimicrobial combination ceftazidime-avibactam against enterobacteriaceae exhibiting different outer membrane permeability profiles, specifically with or without porins and with or without expression of the main efflux pump (acrab-tolc). the addition of the outer membrane permeabilizer polymyxin b nonapeptide increased the antibacterial activities of avibactam alone, ceftazidime alone, and ceftazidime-avibactam against the characterized clinical iso ... | 2015 | 26666933 |
| astaxanthin from psychrotrophic sphingomonas faeni exhibits antagonism against food-spoilage bacteria at low temperatures. | food production and processing industry holds a perpetual relationship with microorganisms and their by-products. in the present study, we aimed to identify beneficial cold-adapted bacteria devoid of any food spoilage properties and study their antagonism against common food-borne pathogens at low temperature conditions. ten isolates were obtained on selective isolation at 5 °c, which were spread across genera pseudomonas, sphingomonas, psychrobacter, leuconostoc, rhodococcus, and arthrobacter. ... | 2015 | 26411893 |
| prevalence of bovine subclinical mastitis, its etiology and diagnosis of antibiotic resistance of dairy farms in four municipalities of a tropical region of mexico. | a region-wide survey was conducted in the tropical area of tierra caliente, state of guerrero, mexico to estimate the prevalence of subclinical bovine mastitis (scm), distribution of mastitis pathogens, and in vitro antimicrobial susceptibility of different mastitis pathogens in dairy farms. in total, 1036 quarter milk samples were obtained from 259 cows at 87 different dairy farms. collected quarter milk samples were submitted for california mastitis test (cmt), bacteriological examination, and ... | 2015 | 26255183 |
| facile green fabrication of nanostructure zno plates, bullets, flower, prismatic tip, closed pine cone: their antibacterial, antioxidant, photoluminescent and photocatalytic properties. | green synthesis of multifunctional zinc oxide nanoparticles (nps) with a variety of morphologies were achieved by low temperature solution combustion route employing neem (azadirachta indica) extract as fuel. the nanoparticles were characterized by pxrd, ftir, xps, raman and uv-visible spectroscopic studies. the morphologies were studied by sem and tem analysis. the nps were subjected for photoluminescence, photocatalytic, antibacterial and antioxidant activity studies. pxrd pattern confirmed th ... | 2016 | 26241826 |
| antibacterial activity of combination of synthetic and biopolymer non-woven structures. | fibrous structures and synthetic polymer blends offer potential usages in making biomedical devices, textiles used in medical practices, food packaging, tissue engineering, environmental applications and biomedical arena. these products are also excellent candidates for building scaffolds to grow stem cells for implantation, to make tissue engineering grafts, to make stents to open up blood vessels caused by atherosclerosis or narrowed by blood clots, for drug delivery systems for micro- to nano ... | 2015 | 26124061 |
| proteolytic and antimicrobial activity of lactic acid bacteria grown in goat milk. | we examined 62 strains and 21 trade starter cultures from the collection of lb bulgaricum plc for proteolytic and antimicrobial activity of lactic acid bacteria (lab) grown in goat milk. the aim of this study was to investigate the fermentation of caseins, α-lactalbumin and β-lactoglobulin by lab, using the o-phthaldialdehyde (opa) spectrophotometric assay and sodium dodecyl sulphate polyacrylamide gel electrophoresis (sds-page). the proteolysis targeted mainly caseins, especially β-casein. whey ... | 2014 | 26019593 |
| an efficient ribitol-specific dehydrogenase from enterobacter aerogenes. | an nad(+)-dependent ribitol dehydrogenase from enterobacter aerogenes kctc 2190 (eardh) was cloned and successfully expressed in escherichia coli. the complete 729-bp gene was amplified, cloned, expressed, and subsequently purified in an active soluble form using nickel affinity chromatography. the enzyme had an optimal ph and temperature of 11.0 and 45°c, respectively. among various polyols, eardh exhibited activity only toward ribitol, with km, vmax, and kcat/km values of 10.3mm, 185umg(-1), a ... | 2015 | 25837508 |
| antibacterial efficacy of five medicinal plants against multidrug-resistant enteropathogenic bacteria infecting under-5 hospitalized children. | to evaluate in vitro antibacterial effectiveness of five medicinal plants used by an indian aborigine, against 8 multidrug-resistant (mdr) enteropathogenic bacteria isolated from clinical samples of under-5 hospitalized children. | 2015 | 25609371 |
| a new antimicrobial and radical-scavenging glycoside from paullinia pinnata var. cameroonensis. | a new glycoside, pinnatoside a (1), together with two known compounds (2 and 3), were isolated from the stems of paullinia pinnata. their structures were elucidated on the basis of extensive spectroscopic analysis and chemical methods. compound 1 showed significant antibacterial activity with a minimum inhibitory concentration (mic) value of 1.56 μg/ml against escherichia coli, and 2 displayed significant antibacterial activity with a mic value of 1.56 μg/ml against enterobacter aerogenes and e. ... | 2015 | 25563339 |
| egcg assisted green synthesis of zno nanopowders: photodegradative, antimicrobial and antioxidant activities. | zinc oxide nanopowders were synthesized by solution combustion method using epigallocatechin gallate (egcg) a tea catechin as fuel. the structure and morphology of the product was characterized by powder x-ray diffraction, scanning electron microscopy, photoluminescence and uv-visible spectroscopy. the nanopowders (nps) were subjected to photocatalytic and biological activities such as antimicrobial and antioxidant studies. pxrd patterns demonstrate that the formed product belongs to hexagonal w ... | 2015 | 25459708 |
| comparative study on the level of bacteriological contamination of automatic teller machines, public toilets and public transport commercial motorcycle crash helmets in kigali city, rwanda. | the environments can be contaminated by infectious agents that constitute a major health hazards as sources of community and hospital-acquired infections due to various activities. | 2014 | 26859015 |
| first report of a clinical, multidrug-resistant enterobacteriaceae isolate coharboring fosfomycin resistance gene fosa3 and carbapenemase gene blakpc-2 on the same transposon, tn1721. | in order to understand the genetic background and dissemination mechanism of carbapenem resistance and fosfomycin resistance in enterobacteriaceae isolates, we studied a clinical escherichia coli strain hs102707 isolate and an enterobacter aerogenes strain hs112625 isolate, both of which were resistant to carbapenem and fosfomycin and positive for the bla(kpc-2) and fosa3 genes. in addition, a clinical klebsiella pneumoniae strain hs092839 isolate which was resistant to carbapenem was also studi ... | 2015 | 25367902 |
| blood stream infections due to oxa-48-like carbapenemase-producing enterobacteriaceae: treatment and survival. | blood stream infections (bsis) due to carbapenem-resistant enterobacteriaceae (cre) are associated with high hospital mortality rates and present a tremendous challenge to clinicians. the optimal treatment remains undefined. we aimed to investigate the risk factors for mortality and the correlation between different treatment modalities and outcomes. | 2014 | 24998423 |
| effect of vitreoscilla hemoglobin and culture conditions on production of bacterial l-asparaginase, an oncolytic enzyme. | l-asparaginase is a widely used cancer chemotherapy enzyme. the source for the enzyme with this property is mainly bacterial and its synthesis is strongly regulated by oxygen. in this study, we utilized two recombinant systems: one carried the gene (vgb) for the vitreoscilla hemoglobin (vhb), a protein of prokaryotic origin which confers a highly efficient oxygen uptake to its host and the other carried the l-asparaginase gene (ansb). the host bacteria were escherichia coli, enterobacter aerogen ... | 2014 | 24970046 |
| dissemination of bacterial fluoroquinolone resistance in two multidrug-resistant enterobacteriaceae. | bacterial resistance to antimicrobials has become one of the greatest challenges for clinical microbiologists and healthcare practitioners worldwide. acquisition of resistance genes has proven to be difficult to characterize and is largely uncontrollable in the environment. here we sought to characterize conjugal horizontal gene transfer of plasmid-encoded fluoroquinolone resistance genes from two strains of enterobacteriaceae, one clinical and one from a municipal wastewater treatment plant env ... | 2014 | 24862457 |
| a food additive with prebiotic properties of an α-d-glucan from lactobacillus plantarum dm5. | an α-d-glucan produced by lactobacillus plantarum dm5 was explored for in vitro prebiotic activities. glucan-dm5 demonstrated 21.6% solubility, 316.9% water holding capacity, 86.2% flocculation activity, 71.4% emulsification activity and a degradation temperature (td) of 292.2°c. glucan-dm5 exhibited lowest digestibility of 0.54% by artificial gastric juice, 0.21% by intestinal fluid and 0.32% by α-amylase whereas the standard prebiotic inulin, showed 25.23%, 5.97% and 19.13%, hydrolysis, respec ... | 2014 | 24857877 |
| comparative genomic analysis of kpc-encoding pkpqil-like plasmids and their distribution in new jersey and new york hospitals. | the global spread of klebsiella pneumoniae carbapenemase (kpc) is predominately associated with k. pneumoniae strains genotyped as sequence type 258 (st258). the first st258-associated plasmid, pkpqil, was described in israel in 2006, but its history in the northeastern united states remains unknown. six pkpqil-like plasmids from four k. pneumoniae isolates (three st258 and one st234), one escherichia coli isolate, and one enterobacter aerogenes isolate, collected from 2003 to 2010 in new york ( ... | 2014 | 24614371 |
| kpc-3 carbapenemase harbored in fiik plasmid from klebsiella pneumoniae st512 and escherichia coli st43 in the same patient. | five carbapenem-resistant strains (three klebsiella pneumoniae, one escherichia coli, and one enterobacter aerogenes) were isolated between 2009 and 2012 at the verona university hospital, italy, during an epidemiological analysis of antibiotic resistance determinants and plasmid profiles in enterobacteriaceae. two out of the five strains, k. pneumoniae e530 and e. coli e558, were cultured from bile and abdominal drainage, respectively, of a single patient. the strains were resistant to beta-lac ... | 2014 | 24571419 |
| cytotoxicity, mode of action and antibacterial activities of selected saudi arabian medicinal plants. | the flora of saudi arabia is one of the richest biodiversity areas in the arabian peninsula and comprises very important genetic resources of crop and medicinal plants. the present study was designed to investigate the cytotoxicity and the antibacterial activities of the organic extracts from twenty six saudi arabian medicinal plants. the study was also extended to the investigation of the effects of the extracts from the four best plants, ononis serrata (sy160), haplophyllum tuberculatum (sy177 ... | 2013 | 24330397 |
| kpc-2 carbapenemase and dha-1 ampc determinants carried on the same plasmid in enterobacter aerogenes. | this study was conducted to analyse the presence of a plasmid-mediated carbapenem resistance mechanism in a clinical enterobacter aerogenes isolate from a patient from jiangsu province, people's republic of china. pcr and sequencing confirmed that the isolate harboured klebsiella pneumoniae carbapenemase (kpc)-2, dha-1 and tem-1 β-lactamase genes. both the kpc-2 and dha-1 genes were transferred to escherichia coli c600 by transconjugation, and southern blotting confirmed that these two genes wer ... | 2014 | 24173427 |
| a comparative study on phosphotransferase activity of acid phosphatases from raoultella planticola and enterobacter aerogenes on nucleosides, sugars, and related compounds. | natural and modified nucleoside-5'-monophosphates and their precursors are valuable compounds widely used in biochemical studies. bacterial nonspecific acid phosphatases (nsaps) are a group of enzymes involved in the hydrolysis of phosphoester bonds, and some of them exhibit phosphotransferase activity. nsap containing enterobacter aerogenes and raoultella planticola whole cells were evaluated in the phosphorylation of a wide range of nucleosides and nucleoside precursors using pyrophosphate as ... | 2014 | 23995227 |
| development of glycerol-utilizing escherichia coli strain for the production of bioethanol. | the production of bioethanol was studied using recombinant escherichia coli with glycerol as a carbon source. glycerol is an attractive feedstock for biofuels production since it is generated as a major byproduct in biodiesel industry; therefore, we investigated the conversion of glycerol to bioethanol using e. coli bl21 (de3) which harbors several genes in ethanol production pathway of enterobacter aerogenes kctc 2190. fermentation was carried out at 34°c for 42h, ph 7.6, using defined producti ... | 2013 | 23830464 |
| fast coliform detection in portable microbe enrichment unit (pmeu) with colilert(®) medium and bubbling. | laboratory strains of coliforms escherichia coli and klebsiella mobilis were used to artificially contaminate water samples in two different cultivation and detection systems, without and with bubble flow. samples were collected with an automated system (ascs). the positive coliform signal caused the color change into yellow (at 550-570nm). this signal could also be transmitted on-line to cell phones. e. coli containing samples emitted uv fluorescence at 480-560nm when activated by uv light. if ... | 2013 | 23790362 |
| national multidrug-resistant bacteria (mdrb) surveillance in france through the raisin network: a 9 year experience. | in the mid-1990s, the prevalence rate of multidrug-resistant bacteria (mdrb) in french hospitals was high and control of mdrb spread then became a major priority in the national infection control programme (icp). | 2013 | 23194721 |
| discovery and biological characterization of geranylated rna in bacteria. | a general ms-based screen for unusually hydrophobic cellular small molecule-rna conjugates revealed geranylated rna in escherichia coli, enterobacter aerogenes, pseudomonas aeruginosa and salmonella enterica var. typhimurium. the geranyl group is conjugated to the sulfur atom in two 5-methylaminomethyl-2-thiouridine nucleotides. these geranylated nucleotides occur in the first anticodon position of trna(glu)(uuc), trna(lys)(uuu) and trna(gln)(uug) at a frequency of up to 6.7% (~400 geranylated n ... | 2012 | 22983156 |
| thymus maroccanus essential oil, a membranotropic compound active on gram-negative bacteria and resistant isolates. | the effects of thymus maroccanus essential oil (eo) on the integrity of the cell membranes and the permeability of the outer membrane (om) and inner membrane (im) of escherichia coli, enterobacter aerogenes and salmonella enterica typhimurium were investigated. | 2012 | 22809088 |
| synthesis, characterization and in vitro antibacterial studies of organotin(iv) complexes with 2-hydroxyacetophenone-2-methylphenylthiosemicarbazone (h(2)dampt). | five new organotin(iv) complexes of 2-hydroxyacetophenone-2-methylphenylthiosemicarbazone [h(2)dampt, (1)] with formula [rsncl(n-1)(dampt)] (where r = me, n = 2 (2); r = bu, n = 2 (3); r = ph, n = 2 (4); r = me(2), n = 1 (5); r = ph(2), n = 1 (6)) have been synthesized by direct reaction of h(2)dampt (1) with organotin(iv) chloride(s) in absolute methanol. the ligand (1) and its organotin(iv) complexes (2-6) were characterized by chn analyses, molar conductivity, uv-vis, ft-ir, (1)h, (13)c, and ... | 2012 | 22611347 |
| comparison of sensing strategies in spr biosensor for rapid and sensitive enumeration of bacteria. | rapid and sensitive detections of microorganisms are very important for biodefence, food safety, medical diagnosis and pharmaceutics. the present study aims to find out the most proper bioactive surface preparation method to develop rapid, sensitive and selective bacteria biosensor, based on surface plasmon resonance (spr) spectroscopy. escherichia coli (e. coli) was used as a model bacterium and four sensing strategies in spr were tested. three of these strategies are antibody immobilization me ... | 2012 | 22608765 |
| [epidemiology of extended spectrum beta-lactamases (esbl) enterobacteriaceae in a general hospital, south of france, 1999-2007]. | the global epidemiology of extended spectrum betalactamases (esbl) producing enterobacteriaceae has evolved in recent years with the emergence of a new type of esbl: ctx-m, mainly in escherichia coli. these ctx-m type producing enterobacteriaceae are responsible for both nosocomial and, more recently, community infections, including urinary tract infections. the aim of our work is to study esbl producing enterobacteriaceae evolution between 1999 and 2007 in the population from the centre hospita ... | 2013 | 22483784 |
| catabolism of amino acids and related compounds. | this review considers the pathways for the degradation of amino acids and a few related compounds (agmatine, putrescine, ornithine, and aminobutyrate), along with their functions and regulation. nitrogen limitation and an acidic environment are two physiological cues that regulate expression of several amino acid catabolic genes. the review considers escherichia coli, salmonella enterica serovar typhimurium, and klebsiella species. the latter is included because the pathways in klebsiella specie ... | 2005 | 26443507 |
| absence of a role for lytic microorganisms in the decline of bacteria andsaccharomyces introduced into soil. | the populations ofklebsieila pneumoniae, escherichia coli, enterobacter aerogenes, andpseudomonas sp. fell following their addition to soil, but species lysing these gram-negative bacteria were not detected. the numbers ofstaphylococcus aureus andmicrococcus flavus fell by more than four orders of magnitude and ofsaccharomyces cerevisiae by more than two orders after their addition to soil. organisms lysing these gram-positive bacteria were present in soil, but their numbers did not increase as ... | 1987 | 24202607 |