added generic NER plans

BioNLP-ST-2016_BB-cat+ner/BB-cat+ner-16436701.txt

+Antibacterial properties of dermaseptin S4 derivatives under extreme incubation conditions.
+Antibacterial properties of the frog-derived peptide dermaseptin S4 and a series of synthetic derivatives against the food pathogen Escherichia coli O157:H7 were investigated under extreme incubation conditions. The 28-mer analog K4K20S4 (P28) displayed an MIC of 8 microM and rapid bactericidal kinetics under standard culture conditions. Potent bactericidal properties were maintained at high salt concentrations, under acidic or basic conditions, and at extreme temperatures. The N-terminal 14-mer sequence (P14) displayed higher potency (MIC, 4 microM) but only within a narrow range of incubation conditions, pointing to the importance of the C-terminal domain of P28. The potency range was reextended upon conjugation of aminododecanoic acid to P14. The resulting lipopeptide was even more potent (MIC, 2 microM) and affected bacterial viability under most of the conditions tested, including in commercial apple juice. The mechanistic implications of peptides' hydrophobicity, charge, structure, and binding to an idealized membrane were probed and are discussed here. Collectively, the data indicate interest in simple peptide-based compounds for design of antimicrobials that affect pathogens under a variable range of incubation conditions.

BioNLP-ST-2016_BB-cat+ner/BB-cat+ner-16458564.txt

+Etiology and epidemiology of diarrhea in children in Hanoi, Vietnam.
+This paper provides a preliminary picture of diarrhea with regards to etiology, clinical symptoms, and some related epidemiologic factors in children less than five years of age living in Hanoi, Vietnam.
+The study population included 587 children with diarrhea and 249 age-matched healthy controls. The identification of pathogens was carried out by the conventional methods in combination with ELISA, immunoseparation, and PCR. The antibiotic susceptibility was determined by MIC following the NCCLS recommendations.
+Of those with diarrhea, 40.9% were less than one year old and 71.0% were less than two years old. A potential pathogen was identified in 67.3% of children with diarrhea. They were group A rotavirus, diarrheagenic Escherichia coli, Shigella spp, and enterotoxigenic Bacteroides fragilis, with prevalences of 46.7%, 22.5%, 4.7%, and 7.3%, respectively. No Salmonella spp or Vibrio cholerae were isolated. Rotavirus and diarrheagenic E. coli were predominant in children less than two years of age, while Shigella spp, and enterotoxigenic B. fragilis were mostly seen in the older children. Diarrheagenic E. coli and Shigella spp showed high prevalence of resistance to ampicillin, chloramphenicol, and to trimethoprim/sulfamethoxazole. Children attending the hospitals had fever (43.6%), vomiting (53.8%), and dehydration (82.6%). Watery stool was predominant with a prevalence of 66.4%, followed by mucous stool (21.0%). The mean episodes of stools per day was seven, ranging from two to 23 episodes. Before attending hospitals, 162/587 (27.6%) children had been given antibiotics. Overall, more children got diarrhea in (i) poor families; (ii) families where piped water and a latrine were lacking; (iii) families where mothers washed their hands less often before feeding the children; (iv) families where mothers had a low level of education; (v) families where information on health and sanitation less often reached their households.
+Group A rotavirus, diarrheagenic Escherichia coli, Shigella spp, and enterotoxigenic Bacteroides fragilis play an important role in causing diarrhea in children in Hanoi, Vietnam. Epidemiological factors such as lack of fresh water supply, unhygienic septic tank, low family income, lack of health information, and low educational level of parents could contribute to the morbidity of diarrhea in children.

BioNLP-ST-2016_BB-cat+ner/BB-cat+ner-1649682.txt

+[The use of rifampin in the treatment of infection due to Staphylococcus aureus].
+Infection due to Staphylococcus aureus continues to be a source of significant morbidity and mortality. However, its treatment is increasingly complicated by the rising prevalence of resistance to antibiotics. Apart from the two recognized modes of staphylococcal resistance, namely, penicillinase production and intrinsic resistance, Sabath and associates have described a third type in which resistance is manifested by susceptibility to growth inhibition but tolerance to the lethal action of bactericidal agents. The mechanism of tolerance is attributed to a deficiency of autolytic enzyme activity in the part of bacteria, possibly secondary to an inhibition of autolysins in the tolerant staphylococcal strains. These strains are found in patients with infections responding poorly to treatment with cell-wall active antibiotics including vancomycin. Because of its unique mechanism of action and pharmacokinetic properties, rifampin has been reported to be the most active among 65 antistaphylococcal agents tested and have the capacity to kill intraleukocytic staphylococci. We present 2 cases who were cured following the addition of rifampin to previously established regimens. Case 1 was a 40-year-old male who had fever, cough, dyspnea, a right elbow abscess and left leg swelling for 2 weeks prior to admission. Culture of purulent material from the elbow abscess grew staphylococcus aureus. Chest X-ray showed bilateral septic embolism and phleborheography showed partial deep vein occlusion of the left ileofemoral vein. Case 2 was 22-year-old female with fever, chills and cough for 3 weeks. Blood culture grew staphylococcus aureus, and Chest X-ray revealed bilateral septic embolism with pneumonia. Neither of them responded to standard antibiotics which were judged adequate by in vitro sensitivity tests. Clinical cure was later obtained after rifampin was added to the regimens. These results suggest that rifampin may be a useful adjunct in the therapy of staphylococcal infections.

BioNLP-ST-2016_BB-cat+ner/BB-cat+ner-16510930.txt

+[Results of serotyping of strains isolated from patients with ulcerative colitis (colitis gravis), adaptive colitis and chronic catarrhal colitis].
+Serotyping of 565 E.coli strains isolated from 273 patients with ulcerative colitis (70 patients); chronic catarrhal colitis (96 patients), adaptive colitis (107 patient) and of 72 E. coli strains isolated from 50 practically healthy persons (control group) was performed. Serotyping was performed in reaction of agglutination, on stage-glass, by use of commercial set consisting of O and H monovalent serum. As a result of performed investigation it was determined, that in patients with different intestinal inflammatory pathologies, there were found significant pathologic changes in intestinal microbiocenosis, in which main role are playing by strains of E. coli. Such violations of intestinal microbiocenosis often are leading to complications of basic disease. Serotyping of E. coli strains has shown, that in formation of pathologic microbiocenosis with more or less equal frequency are taking part enteropathogenic, enteroinvasive, enterotoxic strains of E. coli and also some definite serotypes of E. coli - representatives of normal intestinal microflora with ability of synthesis of thermolabile enterotoxin.

BioNLP-ST-2016_BB-cat+ner/BB-cat+ner-16514151.txt

+Hg(II) sequestration and protection by the MerR metal-binding domain (MBD).
+MerR, the metalloregulator of the bacterial mercury resistance (mer) operon, binds Hg(II) with high affinity. To study the mechanism of metal-induced activation, a small protein was previously engineered embodying in a single polypeptide the metal-binding domain (MBD) ordinarily formed between two monomers of MerR. Here the physiological and biochemical properties of MBD expressed on the cell surface or in the cytosol were examined, to better understand the environments in which specific metal binding can occur with this small derivative. Over 20 000 surface copies of MBD were expressed per Escherichia coli cell, with metal stoichiometries of approximately 1.0 Hg(II) per MBD monomer. Cells expressing MBD on their surface in rich medium bound 6.1-fold more Hg(II) than those not expressing MBD. Although in nature cells use the entire mer operon to detoxify mercury, it was interesting to note that cells expressing only MBD survived Hg(II) challenge and recovered more quickly than cells without MBD. Cell-surface-expressed MBD bound Hg(II) preferentially even in the presence of a 22-fold molar excess of Zn(II) and when exposed to equimolar Cd(II) in addition. MBD expressed in the cystosol also afforded improved survival from Hg(II) exposure for E. coli and for the completely unrelated bacterium Deinococcus radiodurans.

BioNLP-ST-2016_BB-cat+ner/BB-cat+ner-16728960.txt

+Swarming differentiation of vibrio vulnificus downregulates the expression of the vvhBA hemolysin gene via the LuxS quorum-sensing system.
+Swarming has proven to be a good in vitro model for bacterial surface adherence and colonization, and the swarming differentiation of a bacterium has been shown to be coupled with changes in the expression of virulence factors associated with its invasiveness, particularly in the early stages of infection. In this study, we attempted to determine whether the expression of vvhA, which encodes for hemolysin/cytolysin (VvhA), is either upregulated or downregulated during the swarming differentiation of V. vulnificus. The insertional inactivation of vvhA itself exerted no detectable effect on the expression of V. vulnificus swarming motility. However, in our lacZ-fused vvhA transcriptional reporter assay, vvhA expression decreased in swarming V. vulnificus as compared to non-swarming or planktonic V. vulnificus. The reduced expression of vvhA in swarming V. vulnificus increased as a result of the deletional inactivation of luxS, a gene associated with quorum sensing. These results show that vvhA expression in swarming V. vulnificus is downregulated via the activity of the LuxS quorum-sensing system, suggesting that VvhA performs no essential role in the invasiveness of V. vulnificus via the adherence to and colonization on the body surfaces required in the early stages of the infection. However, VvhA may play a significant role in the pathophysiological deterioration occurring after swarming V. vulnificus is differentiated into planktonic V. vulnificus.

BioNLP-ST-2016_BB-cat+ner/BB-cat+ner-16990433.txt

+An extensive repertoire of type III secretion effectors in Escherichia coli O157 and the role of lambdoid phages in their dissemination.
+Several pathogenic strains of Escherichia coli exploit type III secretion to inject "effector proteins" into human cells, which then subvert eukaryotic cell biology to the bacterium's advantage. We have exploited bioinformatics and experimental approaches to establish that the effector repertoire in the Sakai strain of enterohemorrhagic E. coli (EHEC) O157:H7 is much larger than previously thought. Homology searches led to the identification of >60 putative effector genes. Thirteen of these were judged to be likely pseudogenes, whereas 49 were judged to be potentially functional. In total, 39 proteins were confirmed experimentally as effectors: 31 through proteomics and 28 through translocation assays. At the protein level, the EHEC effector sequences fall into >20 families. The largest family, the NleG family, contains 14 members in the Sakai strain alone. EHEC also harbors functional homologs of effectors from plant pathogens (HopPtoH, HopW, AvrA) and from Shigella (OspD, OspE, OspG), and two additional members of the Map/IpgB family. Genes encoding proven or predicted effectors occur in >20 exchangeable effector loci scattered throughout the chromosome. Crucially, the majority of functional effector genes are encoded by nine exchangeable effector loci that lie within lambdoid prophages. Thus, type III secretion in E. coli is linked to a vast phage "metagenome," acting as a crucible for the evolution of pathogenicity.

BioNLP-ST-2016_BB-cat+ner/BB-cat+ner-17237163.txt

+Quorum-sensing regulation of adhesion in Serratia marcescens MG1 is surface dependent.
+Serratia marcescens is an opportunistic pathogen and a major cause of ocular infections. In previous studies of S. marcescens MG1, we showed that biofilm maturation and sloughing were regulated by N-acyl homoserine lactone (AHL)-based quorum sensing (QS). Because of the importance of adhesion in initiating biofilm formation and infection, the primary goal of this study was to determine whether QS is important in adhesion to both abiotic and biotic surfaces, as assessed by determining the degree of attachment to hydrophilic tissue culture plates and human corneal epithelial (HCE) cells. Our results demonstrate that while adhesion to the abiotic surface was AHL regulated, adhesion to the HCE cell biotic surface was not. Type I fimbriae were identified as the critical adhesin for non-QS-mediated attachment to the biotic HCE cell surface but played no role in adhesion to the abiotic surface. While we were not able to identify a single QS-regulated adhesin essential for attachment to the abiotic surface, four AHL-regulated genes involved in adhesion to the abiotic surface were identified. Interestingly, two of these genes, bsmA and bsmB, were also shown to be involved in adhesion to the biotic surface in a non-QS-controlled fashion. Therefore, the expression of these two genes appears to be cocontrolled by regulators other than the QS system for mediation of attachment to HCE cells. We also found that QS in S. marcescens regulates other potential cell surface adhesins, including exopolysaccharide and the outer membrane protein OmpX. We concluded that S. marcescens MG1 utilizes different regulatory systems and adhesins in attachment to biotic and abiotic surfaces and that QS is a main regulatory pathway in adhesion to an abiotic surface but not in adhesion to a biotic surface.

BioNLP-ST-2016_BB-cat+ner/BB-cat+ner-17261513.txt

+Use of transposon promoter-probe vectors in the metabolic engineering of the obligate methanotroph Methylomonas sp. strain 16a for enhanced C40 carotenoid synthesis.
+The recent expansion of genetic and genomic tools for metabolic engineering has accelerated the development of microorganisms for the industrial production of desired compounds. We have used transposable elements to identify chromosomal locations in the obligate methanotroph Methylomonas sp. strain 16a that support high-level expression of genes involved in the synthesis of the C(40) carotenoids canthaxanthin and astaxanthin. with three promoterless carotenoid transposons, five chromosomal locations-the fliCS, hsdM, ccp-3, cysH, and nirS regions-were identified. Total carotenoid synthesis increased 10- to 20-fold when the carotenoid gene clusters were inserted at these chromosomal locations compared to when the same carotenoid gene clusters were integrated at neutral locations under the control of the promoter for the gene conferring resistance to chloramphenicol. A chromosomal integration system based on sucrose lethality was used to make targeted gene deletions or site-specific integration of the carotenoid gene cluster into the Methylomonas genome without leaving genetic scars in the chromosome from the antibiotic resistance genes that are present on the integration vector. The genetic approaches described in this work demonstrate how metabolic engineering of microorganisms, including the less-studied environmental isolates, can be greatly enhanced by identifying integration sites within the chromosome of the host that permit optimal expression of the target genes.

BioNLP-ST-2016_BB-cat+ner/BB-cat+ner-17687514.txt

+Unveiling molecular mechanisms of bacterial surface proteins: Streptococcus pneumoniae as a model organism for structural studies.
+Bacteria present a variety of molecules either on their surface or in a cell-free form. These molecules take part in numerous processes in the interactions with their host, with its tissues and other molecules. These molecules are essential to bacterial pathogenesis either during colonization or the spread/invasion stages, and most are virulence factors. This review is focused on such molecules using Streptococcus pneumoniae, a Gram-positive bacterium, as an example. Selected surface proteins are introduced, their structure described, and, whenever available, their mechanisms of function on an atomic level are explained. Such mechanisms for hyaluronate lyase, pneumococcal surface protein A, pneumolysin, histidine-triad and fibronectin-binding proteins are discussed. Elucidation of molecular mechanisms of virulence factors is essential for the understanding of bacteria and their functional properties. Structural biology appears pivotal for these studies, as structural and mechanistic insights facilitate rational approach to the development of new treatments.

BioNLP-ST-2016_BB-cat+ner/BB-cat+ner-18094887.txt

+Rickettsia infection in five areas of the state of São Paulo, Brazil.
+This study investigated rickettsial infection in animals, humans, ticks, and fleas collected in five areas of the state of São Paulo. Eight flea species (Adoratopsylla antiquorum antiquorum, Ctenocephalides felis felis, Polygenis atopus, Polygenis rimatus, Polygenis roberti roberti, Polygenis tripus, Rhopalopsyllus lugubris, and Rhopalopsyllus lutzi lutzi), and five tick species (Amblyomma aureolatum, Amblyomma cajennense, Amblyomma dubitatum, Ixodes loricatus, and Rhipicephalus sanguineus) were collected from dogs, cats, and opossums. Rickettsia felis was the only rickettsia found infecting fleas, whereas Rickettsia bellii was the only agent infecting ticks, but no animal or human blood was shown to contain rickettsial DNA. Testing animal and human sera by indirect immunofluorescence assay against four rickettsia antigens (R. rickettsii, R. parkeri, R. felis, and R. bellii), some opossum, dog, horse, and human sera reacted to R. rickettsii with titers at least four-fold higher than to the other three rickettsial antigens. These sera were considered to have a predominant antibody response to R. rickettsii. Using the same criteria, opossum, dog, and horse sera showed predominant antibody response to R. parkeri or a very closely related genotype. Our serological results suggest that both R. rickettsii and R. parkeri infected animals and/or humans in the studied areas.

BioNLP-ST-2016_BB-cat+ner/BB-cat+ner-18687046.txt

+Impact of intracranial pressure monitor prophylaxis on central nervous system infections and bacterial multi-drug resistance.
+Routine intracranial pressure monitor (ICP) prophylaxis is not practiced at our institution. Nevertheless, some patients receive de facto prophylaxis as a result of the use of antibiotics for injuries such as open or facial fractures. We tested the hypothesis that prophylactic antibiotics do not reduce the incidence of central nervous system (CNS) infections but instead are associated with the acquisition of multi-drug resistant (MDR) bacterial infections.
+Patients admitted to the trauma intensive care unit (TICU) from January, 2001 through December, 2004 with blunt, non-operative traumatic brain injury who were managed solely with an ICP monitor were identified from our trauma registry and divided into two groups: (1) Those receiving no antibiotics prior to or during ICP monitoring (NONE; n = 71); and (2) those already receiving antibiotics at the time of ICP monitor insertion (PRO; n = 84). Groups were stratified on the basis of age, Injury Severity Score (ISS), Glasgow Coma Scale (GCS) Score, base excess (BE), ICP days, transfusions in 24 h, ICU days, ventilator days, head Abbreviated Injury Score (AIS), and chest AIS. The study groups did not differ with respect to age, ISS, GCS, BE, ICP days, 24-h transfusions, ICU days, ventilator days, head AIS, or length of stay. In all, 183 patients were identified, of whom 28 died within seven days and were excluded from the analysis. All patients were followed until discharge for both CNS infections and subsequent infectious complications.
+Only two patients, both in the PRO group, developed CNS infection. Both infectious complications (0.7 vs 1.4 per patient; p < 0.05) and infections secondary to MDR pathogens (0.03 vs. 0.33 per patient; p < 0.01) were significantly more common in the PRO group. Twenty-nine percent of the ventilator-associated pneumonias and 33% of the blood stream infections in the PRO group were MDR, whereas only two blood stream infections in the NONE group (4% of the total infections) were MDR.
+The routine use of prophylactic antibiotics for ICP monitor insertion is not warranted. This practice does not reduce the CNS infection rate and is associated with more MDR pathogens in any subsequent infectious complications.

BioNLP-ST-2016_BB-cat+ner/BB-cat+ner-18694716.txt

+Quantitative metabolome analysis using liquid chromatography-high-resolution mass spectrometry.
+In this report, we introduce a liquid chromatography single-mass spectrometry method for metabolome quantification, using the LTQ Orbitrap high-resolution mass spectrometer. Analytes were separated with hydrophilic interaction liquid chromatography. At a working resolution of 30,000 (at m/z 400), the limit of detection varied from 50 fmol to 5 pmol for 25 metabolites tested. In terms of metabolite concentration, the linearity was about 2 to 3 orders of magnitude for most compounds (R(2)>0.99). To determine the accuracy of the system in complex sample matrices, the isotope dilution method was evaluated from mixtures of pure compounds and uniformly 13C-labeled cell extracts. With the application of this method, quantification was possible within single runs even when the pool sizes of individual metabolites varied from 0.13 to 55.6 microM. As a case study, intracellular concentrations of central metabolites were determined for Methylobacterium extorquens AM1 during growth on two different carbon sources, methanol and succinate. Reproducible results from technical and biological repetitions were obtained that revealed significant variations of intracellular metabolite pool sizes, depending on the carbon source. The LTQ Obitrap offers new perspectives and strategies for metabolome quantification.

BioNLP-ST-2016_BB-cat+ner/BB-cat+ner-18789156.txt

+A novel receptor - ligand pathway for entry of Francisella tularensis in monocyte-like THP-1 cells: interaction between surface nucleolin and bacterial elongation factor Tu.
+Francisella tularensis, the causative agent of tularemia, is one of the most infectious human bacterial pathogens. It is phagocytosed by immune cells, such as monocytes and macrophages. The precise mechanisms that initiate bacterial uptake have not yet been elucidated. Participation of C3, CR3, class A scavenger receptors and mannose receptor in bacterial uptake have been already reported. However, contribution of an additional, as-yet-unidentified receptor for F. tularensis internalization has been suggested.
+We show here that cell-surface expressed nucleolin is a receptor for Francisella tularensis Live Vaccine Strain (LVS) and promotes LVS binding and infection of human monocyte-like THP-1 cells. The HB-19 pseudopeptide that binds specifically carboxy-terminal RGG domain of nucleolin inhibits LVS binding and infection of monocyte-like THP-1 cells. In a pull-down assay, elongation factor Tu (EF-Tu), a GTP-binding protein involved in protein translation, usually found in cytoplasm, was recovered among LVS bacterial membrane proteins bound on RGG domain of nucleolin. A specific polyclonal murine antibody was raised against recombinant LVS EF-Tu. By fluorescence and electron microscopy experiments, we found that a fraction of EF-Tu could be detected at the bacterial surface. Anti-EF-Tu antibodies reduced LVS binding to monocyte-like THP-1 cells and impaired infection, even in absence of complement and complement receptors. Interaction between EF-Tu and nucleolin was illustrated by two different pull-down assays using recombinant EF-Tu proteins and either RGG domain of nucleolin or cell solubilized nucleolin.
+Altogether, our results demonstrate that the interaction between surface nucleolin and its bacterial ligand EF-Tu plays an important role in Francisella tularensis adhesion and entry process and may therefore facilitate invasion of host tissues. Since phagosomal escape and intra-cytosolic multiplication of LVS in infected monocytes are very similar to those of human pathogenic F. tularensis ssp tularensis, the mechanism of entry into monocyte-like THP-1 cells, involving interaction between EF-Tu and nucleolin, might be similar in the two subspecies. Thus, the use of either nucleolin-specific pseudopeptide HB-19 or recombinant EF-Tu could provide attractive therapeutic approaches for modulating F. tularensis infection.

BioNLP-ST-2016_BB-cat+ner/BB-cat+ner-18845825.txt

+High genetic diversity of nontypeable Haemophilus influenzae isolates from two children attending a day care center.
+Twenty-one nontypeable Haemophilus influenzae (NTHi) isolates from the throats of two healthy children were genotyped by multilocus sequence typing. Nine unique sequence types (STs) were identified. These STs were scattered throughout the phylogenetic tree of reported NTHi STs, demonstrating the high level of NTHi diversity found in colonized children.

BioNLP-ST-2016_BB-cat+ner/BB-cat+ner-19004249.txt

+Evaluation of antibacterial activity of synthetic aliphatic and aromatic monoacylglycerols.
+The antibacterial activity of synthetic aliphatic and aromatic monoacylglycerols (MAGs) was studied against two human pathogens: Staphylococcus aureus and Escherichia coli. The active compounds inhibited selectively S. aureus. The most active compounds amongst them were those with medium size aliphatic chain and aromatic MAGs with electron withdrawing substituents at the aryl ring. The introduction of one or two-carbon spacer between the aryl ring and the carboxylic function did not influence antibacterial effectiveness.

BioNLP-ST-2016_BB-cat+ner/BB-cat+ner-19049879.txt

+Molecular cloning and expression of MyD88 in large yellow croaker, Pseudosciaena crocea.
+Myeloid differentiation factor 88 (MyD88) is an adaptor protein involved in the interleukin-1 receptor and Toll-like receptor-induced activation of nuclear factor-kappaB (NF-kappaB). In this report, the full-length cDNA of MyD88 was cloned from the large yellow croaker, Pseudosciaena crocea. It was of 1574 bp, including a 5'-terminal untranslated region (UTR) of 89 bp, a 3'-terminal UTR of 621bp and an open reading frame (ORF) of 864 bp encoding a polypeptide of 287 amino acids. It contained a typical death domain at the N-terminal and a conservative Toll/IL-1R (TIR) domain structure at the C-terminal. The quantitative real-time reverse transcription PCR analysis revealed a broad expression of MyD88 with the highest expression in the spleen and the weakest expression in the muscle. The expression of MyD88 after challenge with formalin-inactivated Gram-negative bacterium Vibrio parahaemolyticus was tested in blood, spleen and liver. It suggested that the highest expression was in the spleen (p<0.05) with 1.9 times (at 48 h) as much as that in the control and the lowest expression of MyD88 was in the liver (p<0.05) with 0.29 times (at 3h) of that in the control. These results indicated that as a universal key adaptor in the Toll-like receptor pathway in mammals, MyD88 might play an important role in large yellow croaker defense against pathogenic infection.

BioNLP-ST-2016_BB-cat+ner/BB-cat+ner-19075662.txt

+Prevention and treatment of Staphylococcus biofilms.
+Staphylococcus growth on medical devices represents a common occurrence that can lead to serious illness and death. Biomaterial-associated infection, mostly caused by Staphylococcus epidermidis and Staphylococcus aureus, is fairly complicated by the organism' development of a biofilm, which provides a microenvironment that protects from attack by the host immune system and antibiotics. In this review we present recent insights regarding S. aureus and S. epidermidis structural and functional factors that are effective in biofilm development and describe the regulation of their expression. On the basis of the knowledge gained, we also present the potential and limits of current biochemical and biophysical strategies aimed at preventing biofilm formation or at the treatment of established mature biofilms.

BioNLP-ST-2016_BB-cat+ner/BB-cat+ner-19099664.txt

+[Changes of pathogens and susceptibility to antibiotics in hematology ward from years 2001 to 2005].
+The purpose of this study was to determine the changes of pathogens in hematological ward and susceptibility of patients received chemotherapy to antibiotics. The pathogens were taken from blood, urine and sputum of patients who accepted chemotherapy from years 2001 to 2005, then were isolated and identified. The susceptibility test was performed by disk diffusion method. The results showed that the total of 418 strains were detected. Gram-negative bacteria were the most common of nosocomial infection. Pseudomonas aeruginosa, Enterobacter cloacae, E. coli account for the most of Gram negative- bacteria infection and most resistant to broad-spectrum penicillin, Acinetobacter baumannii showed a trend of increase. The ratios of gram positive bacteria and fungi were increased slowly, mainly as Enterococcus and Candida. Enterococcus is the most common cause of Gram-positive bacterial infection. Vancomycin resistance did not occur. It is concluded that Gram-negative bacteria are main cause of nosocomial infection in patients with hematological malignancies. Gram positive bacteria and fungi had been more frequent. Strains resistant to antimicrobial agents increase.

BioNLP-ST-2016_BB-cat+ner/BB-cat+ner-19175621.txt

+Occurrence of extended-spectrum beta-lactamase-producing Salmonella enterica in northern Spain with evidence of CTX-M-9 clonal spread among animals and humans.
+Among the 1233 Salmonella enterica isolates obtained in two Spanish hospitals, five isolates (0.4%) (serovars: Virchow, four; Livingstone, one) had the phenotype of an extended-spectrum beta-lactamase (ESBL) producer. The genetic characterization of the ESBL of S. enterica Livingstone revealed a bla(SHV-2) gene. The bla(CTX-M-10) gene in a phage-related genetic environment was found in one S. enterica Virchow isolate, and the bla(CTX-M-9) gene within the In60 integron was found in the three remaining Virchow isolates. These three isolates presented indistinguishable or closely related pulsed-field gel electrophoresis patterns among themselves and also as compared with the two other bla(CTX-M-9)-containing isolates previously obtained from animals. ESBL production is an emerging mechanism of resistance in S. enterica in the two studied hospitals.