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https://www.readbyqxmd.com/read/28932221/diversity-of-vibrio-navarrensis-revealed-by-genomic-comparison-veterinary-isolates-are-related-to-strains-associated-with-human-illness-and-sewage-isolates-while-seawater-strains-are-more-distant
#1
Keike Schwartz, Cindy Kukuc, Nadja Bier, Karin Taureck, Jens A Hammerl, Eckhard Strauch
Strains of Vibrio navarrensis are present in aquatic environments like seawater, rivers, and sewage. Recently, strains of this species were identified in human clinical specimens. In this study, V. navarrensis strains isolated from livestock in Germany were characterized that were found in aborted fetuses and/or placentas after miscarriages. The veterinary strains were analyzed using phenotypical and genotypical methods and compared to isolates from marine environments of the Baltic Sea and North Sea. The investigated phenotypical traits were similar in all German strains...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28930185/bioprospecting-for-exopolysaccharides-from-deep-sea-hydrothermal-vent-bacteria-relationship-between-bacterial-diversity-and-chemical-diversity
#2
Christine Delbarre-Ladrat, Marcia Leyva Salas, Corinne Sinquin, Agata Zykwinska, Sylvia Colliec-Jouault
Many bacteria biosynthesize structurally diverse exopolysaccharides (EPS) and excrete them into their surrounding environment. The EPS functional features have found many applications in industries such as cosmetics and pharmaceutics. In particular, some EPS produced by marine bacteria are composed of uronic acids, neutral sugars, and N-acetylhexosamines, and may also bear some functional sulfate groups. This suggests that they can share common structural features with glycosaminoglycans (GAG) like the two EPS (HE800 and GY785) originating from the deep sea...
September 20, 2017: Microorganisms
https://www.readbyqxmd.com/read/28930017/carbapenemase-vcc-1-producing-vibrio-cholerae-in-coastal-waters-of-germany
#3
Jens A Hammerl, Claudia Jäckel, Valeria Bortolaia, Keike Schwartz, Nadja Bier, Rene S Hendriksen, Beatriz Guerra, Eckhard Strauch
During antimicrobial drug resistance testing for Vibrio spp. from coastal waters of Germany, we identified 4 nontoxigenic, carbapenem-resistant V. cholerae isolates. We used whole-genome sequencing to identify the carbapenemase gene blaVCC-1. In addition, a molecular survey showed that more blaVCC-1-harboring isolates are present in coastal waters of Germany.
October 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28928424/genome-characterization-of-two-bile-isolated-vibrio-fluvialis-strains-an-insight-into-pathogenicity-and-bile-salt-adaption
#4
Beiwen Zheng, Xiawei Jiang, Hong Cheng, Lihua Guo, Jing Zhang, Hao Xu, Xiao Yu, Chen Huang, Jinru Ji, Chaoqun Ying, Youjun Feng, Yonghong Xiao, Lanjuan Li
Vibrio fluvialis is recognized as an emerging pathogen. However, not much is known about the mechanism of its pathogenesis, and its adaptation to a special niche such as the gall bladder. Here we describe two V. fluvialis strains that cause acute cholecystitis. It is noteworthy that both strains were susceptible to all antibiotics tested, which is in contrast to previous studies, suggesting substantial genetic diversity among V. fluvialis isolates. In agreement with their survival and growth in the gall bladder, the genomes of strains 12605 and 3663 contain a considerable number of genes that confer resistance to bile, including toxR, omp U, tolC, cmeABC, rlpB, yrbK, rpoS, damX and gltK...
September 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28928075/expression-and-functional-characterization-of-interferon-regulatory-factors-4-8-and-9-in-large-yellow-croaker-larimichthys-crocea
#5
Jingteng Tang, Lihua Jiang, Wei Liu, Bao Lou, Changwen Wu, Jianshe Zhang
Interferon regulatory factor (IRF)-4, 8, and 9 are essential in host defense against pathogens. Here, the full-length coding sequence (CDS), protein structure, and immune response of IRF4/8/9 (lc IRF4/8/9) were characterized in large yellow croaker (Larimichthys crocea). The open reading frame of lcIRF4, lcIRF8 and lcIRF9 encoded putative proteins of 463,422 and 406 amino acids, respectively. These IRFs share high sequence homology with other vertebrate IRFs and were constitutively expressed in all examined tissues...
September 16, 2017: Developmental and Comparative Immunology
https://www.readbyqxmd.com/read/28927688/effects-of-dietary-hawthorn-extract-on-growth-performance-immune-responses-growth-and-immune-related-genes-expression-of-juvenile-golden-pompano-trachinotus-ovatus-and-its-susceptibility-to-vibrio-harveyi-infection
#6
Xiaohong Tan, Zhenzhu Sun, Zhong Huang, Chuanpeng Zhou, Heizhao Lin, Lianjie Tan, Pengwei Xun, Qian Huang
The present study was conducted to investigate the effects of dietary hawthorn extract (HTE) supplementation on growth performance, immune responses, hepatic antioxidant abilities, growth- and immune-related and heat shock protein genes expression and resistance to the pathogen Vibrio harveyi in Trachinotus ovatus. A basal diet supplemented with HTE at 0 (Diet 1), 0.50 (Diet 2), 1.00 (Diet 3), 2.00 (Diet 4), 4.00 (Diet 5) and 10.00 (Diet 6) g kg(-1) were fed to golden pompano for 8 weeks. The highest final body weight, weight gain rate, specific growth rate, feed efficiency ratio and protein efficiency rate were observed in fish fed Diet 2 (P < 0...
September 16, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28926554/erratum-a-vibrio-cholerae-autoinducer-receptor-pair-that-controls-biofilm-formation
#7
Kai Papenfort, Justin E Silpe, Kelsey R Schramma, Jian-Ping Cong, Mohammad R Seyedsayamdost, Bonnie L Bassler
No abstract text is available yet for this article.
September 19, 2017: Nature Chemical Biology
https://www.readbyqxmd.com/read/28926551/erratum-a-vibrio-cholerae-autoinducer-receptor-pair-that-controls-biofilm-formation
#8
Kai Papenfort, Justin E Silpe, Kelsey R Schramma, Jian-Ping Cong, Mohammad R Seyedsayamdost, Bonnie L Bassler
No abstract text is available yet for this article.
September 19, 2017: Nature Chemical Biology
https://www.readbyqxmd.com/read/28926339/flipping-the-switch
#9
Xavier Pierrat, Alexandre Persat
A structural switch controls the architecture of Vibrio cholerae biofilms by mediating the interactions between two matrix components.
September 19, 2017: ELife
https://www.readbyqxmd.com/read/28923715/a-multiplex-bead-based-assay-for-immune-gene-expression-analysis-in-shrimp
#10
Sopacha Arayamethakorn, Nitsara Karoonuthaisiri, Wanilada Rungrassamee
Here, we developed a 9-plex bead-based array as a tool to evaluate molecular effects on transcription levels of immune-related genes in the black tiger shrimp (Penaeus monodon). The bead array technology allows simultaneous detection of multiple target genes in a single sample, reducing time, labor and cost. The oligonucleotide probes were designed to target eight immune-related genes that involve in antimicrobial activity, melanization, pathogen pattern recognition proteins, lysozyme and one housekeeping gene as an internal control...
September 15, 2017: Journal of Biotechnology
https://www.readbyqxmd.com/read/28923608/molecular-characterization-and-phylogenetic-analysis-of-highly-pathogenic-vibrio-alginolyticus-strains-isolated-during-mortality-outbreaks-in-cultured-ruditapes-decussatus-juvenile
#11
Badreddine Mechri, Monastiri Abir, Amel Medhioub, Mohamed Nejib Medhioub, Mahjoub Aouni
In the summer of 2008 and 2009, a series of mortalities in growing out seeds of R. decussatus juveniles were occurred in the eastern Tunisian littoral. Nine predominant bacterial strains were isolated from dead and moribund juveniles and characterized as Vibrio alginolyticus. These isolates were subjected to biochemical and molecular characterization. All the Vibrio strains were tested for their susceptibility against the most widely used antibiotic in aquaculture as well as, the assessment of the presence of erythromycin (emrB) and tetracycline (tetS) resistance genes among the tested bacteria...
September 15, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28923607/the-role-of-ctx-and-rs1-satellite-phages-genomic-arrangement-in-vibrio-cholera-toxin-production-in-two-recent-cholera-outbreaks-2012-and-2013-in-ir-iran
#12
Niloofar Rezaie, Bita Bakhshi, Shahin-Najar Peerayeh
The objective of the present study was to investigate the genomic arrangement of CTX/RS1 prophages in 30 Vibrio cholerae strains obtained from 2 consecutive years of cholera outbreak and to compare the role of different CTX/RS1 arrangements in cholera toxin expression among the El Tor strains. Profile A with TLC-RS1-CTX-RTX arrangement was observed in 46.7% of the isolates with RS1 phage locating adjacent to TLC element. About 50% of the isolates showed Profile B with TLC-CTX-RS1-RTX arrangement and one single isolate (3...
September 16, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28923592/comparative-study-of-three-c1q-domain-containing-proteins-from-pacific-oyster-crassostrea-gigas
#13
Zhao Lv, Limei Qiu, Mengqiang Wang, Zhihao Jia, Weilin Wang, Lusheng Xin, Zhaoqun Liu, Lingling Wang, Linsheng Song
C1q domain containing proteins (C1qDCs) are a family of proteins containing a globular head C1q domain (ghC1q) in C-terminus, which serve as pattern recognition receptors (PRRs) and mediate a series of immune responses. In the present study, three C1qDC proteins from Pacific oyster Crassostrea gigas (CgC1qDC-2, CgC1qDC-3, CgC1qDC-4) were characterized and comparatively investigated to understand their roles in the immune response. All the three recombinant CgC1qDC proteins (rCgC1qDCs) could bind lipopolysaccharide (LPS) significantly but they could not bind lipoteichoic acid (LTA), β-1,3-glucan (GLU), mannan (MAN), and polyinosinic-polycytidylic acid (Poly I:C)...
September 16, 2017: Developmental and Comparative Immunology
https://www.readbyqxmd.com/read/28923525/morphological-and-functional-characterization-of-the-hemocytes-from-the-pearl-oyster-pteria-hirundo-and-their-immune-responses-against-vibrio-infections
#14
Graziela Cleuza Vieira, Patrícia Mirella da Silva, Margherita Anna Barracco, Augusto Ferrari Hering, Marcos Caivano Pedroso de Albuquerque, Jaqueline da Rosa Coelho, Éder Carlos Schmidt, Zenilda Laurita Bouzon, Rafael Diego Rosa, Luciane Maria Perazzolo
Hemocyte populations of the pearl oyster Pteria hirundo were characterized at morphological, ultrastructural and functional levels. Three main hemocyte populations were identified: hyalinocytes, granulocytes and blast-like cells. Hyalinocytes were the most abundant population (88.2%) characterized by the presence of few or no granules in the cytoplasm and composed by two subpopulations, large and small hyalinocytes. Comparatively, granulocytes represented 2.2% of the hemocyte population and were characterized by the presence of numerous large electron-lucid granules in the cytoplasm...
September 16, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28923497/cholera-vaccine-use-is-associated-with-a-reduced-risk-of-death-in-patients-with-colorectal-cancer-a-population-based-study
#15
Jianguang Ji, Jan Sundquist, Kristina Sundquist
BACKGROUND & AIMS: Cholera toxin can act as a modulator of the immune response with anti-inflammatory effects; it reduces development of colon polyps in mouse models of colorectal cancer (CRC). We performed a population-based study to determine whether, in patients with a diagnosis of CRC, subsequent administration of the cholera vaccine (killed Vibrio cholerae O1 whole cells and recombinant cholera toxin B subunit) affects mortality. METHODS: We identified patients from the Swedish Cancer Register who were diagnosed with CRC from July 2005 through December 2012...
September 15, 2017: Gastroenterology
https://www.readbyqxmd.com/read/28920855/pfma-a-novel-quorum-quenching-n-acylhomoserine-lactone-acylase-from-pseudoalteromonas-flavipulchra
#16
Na Liu, Min Yu, Youbin Zhao, Jingguang Cheng, Ke An, Xiao-Hua Zhang
Many bacteria, such as Proteobacteria, Cyanobacteria and Bacteroidetes, use N-acylhomoserine lactones (AHLs) as quorum-sensing (QS) signal molecules for communication. Enzymatic degradation of AHLs, such as AHL acylase and AHL lactonase, can degrade AHLs (quorum quenching, QQ) to attenuate or disarm the virulence of pathogens. QQ is confirmed to be common in marine bacterial communities. Many genes encoding AHL acylases are found in marine bacteria and metagenomic collections, but only a few of these have been characterized in detail...
September 18, 2017: Microbiology
https://www.readbyqxmd.com/read/28919890/pathobiomes-differ-between-two-diseases-affecting-reef-building-coralline-algae
#17
Anne-Leila Meistertzheim, Maggy M Nugues, Gaëlle Quéré, Pierre E Galand
Crustose coralline algae (CCA) are major benthic calcifiers that play crucial roles in coral reef ecosystems. Two diseases affecting CCA have recently been investigated: coralline white band syndrome (CWBS) and coralline white patch disease (CWPD). These diseases can trigger major losses in CCA cover on tropical coral reefs, but their causative agents remain unknown. Here, we provide data from the first investigation of the bacterial communities associated with healthy and diseased CCA tissues. We show that Neogoniolithon mamillare diseased tissues had distinct microbial communities compared to healthy tissues and demonstrate that CWBS and CWPD were associated with different pathobiomes, indicating that they had different disease causations...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28919442/structural-and-functional-analysis-of-the-c-terminal-region-of-flig-an-essential-motor-component-of-vibrio-na-driven-flagella
#18
Yohei Miyanoiri, Atsushi Hijikata, Yuuki Nishino, Mizuki Gohara, Yasuhiro Onoue, Seiji Kojima, Chojiro Kojima, Tsuyoshi Shirai, Masatsune Kainosho, Michio Homma
The flagellar motor protein complex consists of rotor and stator proteins. Their interaction generates torque of flagellum, which rotates bidirectionally, clockwise (CW) and counterclockwise. FliG, one of the rotor proteins, consists of three domains: N-terminal (FliGN), middle (FliGM), and C-terminal (FliGC). We have identified point mutations in FliGC from Vibrio alginolyticus, which affect the flagellar motility. To understand the molecular mechanisms, we explored the structural and dynamic properties of FliGC from both wild-type and motility-defective mutants...
September 6, 2017: Structure
https://www.readbyqxmd.com/read/28919361/molecular-characterisation-ontogeny-and-expression-analysis-of-melanoma-differentiation-associated-factor-5-mda5-from-asian-seabass-lates-calcarifer
#19
Anutosh Paria, M Makesh, Aparna Chaudhari, C S Purushothaman, K V Rajendran
MDA5 is the pivotal member of the retinoic acid-inducible gene I (RIG-I)-like receptors (RLRs) and is reported to play a crucial role in type I IFN-mediated responses against pathogen-associated molecular patterns (PAMPs), especially nucleic acids. In this study, we have identified and cloned the full-length cDNA sequence of MDA5, which comprises 3398 nucleotides and encodes for a putative protein of 978 AA length, in Asian seabass, Lates calcarifer. From the putative amino acid sequence of AsMDA5, four different conserved domains could be predicted: two N-terminal CARD domains, a DExDc domain, a HELICc domain and a C-terminal RIG-1_C-RD domain...
September 15, 2017: Developmental and Comparative Immunology
https://www.readbyqxmd.com/read/28919196/inca-c-plasmids-conferring-high-azithromycin-resistance-in-vibrio-cholera
#20
Ruibai Wang, Haican Liu, Xiuqin Zhao, Jie Li, Kanglin Wan
Azithromycin (AZM) is a clinically important antibiotic to Vibrio cholerae especially for inhibiting colonization of V. cholerae in intestine and the treatment of severe cholera in children and pregnant women. One IncA/C plasmid was isolated from both of the high MIC AZM resistant V cholerae strains of the two mainly pathogenic serogroups, O1 and O139. In the 172 predicted ORFs, 16 genes were related to antibiotic resistance in which 5 were well-defined genes associated with macrolide resistance. The 5 macrolide resistant genes disturbed in two clusters, mphR-mrx-mph(K) and mel-mph2, flanking by insertion sequence (IS) and involving two kinds of mechanisms...
September 14, 2017: International Journal of Antimicrobial Agents
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