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https://www.readbyqxmd.com/read/28214598/three-stats-are-involved-in-the-regulation-of-the-expression-of-antimicrobial-peptides-in-the-triangle-sail-mussel-hyriopsis-cumingii
#1
Yun-Jia Dai, Kai-Min Hui, Ying-Hao Zhang, Yan Liu, Yu-Qing Wang, Li-Juan Zhao, Li Lin, Lian-Qin Chai, Shun Wei, Jiang-Feng Lan
Janus kinase (Jak) and signal transducers and activators of transcription (STAT) signaling pathway is associated in antiviral and antibacterial immune response. Previous studies primarily investigated the function of STATs in mammals. For most invertebrates, only one STAT was found in each species, such as STAT92E was found in Drosophila melanogaster. The studies, which focus on the functional difference between various STATs in the same species of invertebrate, are limited. In the present study, three STATs (HcSTAT1, HcSTAT2 and HcSTAT3) were identified in triangle shell pearl mussel, Hyriopsis cumingii...
February 15, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28209550/pathogenicity-of-mexican-isolates-of-aeromonas-sp-in-immersion-experimentally-infected-rainbow-trout-oncorhynchus-mykiss-walbaum-1792
#2
Andrea Paloma Zepeda-Velázquez, Vicente Vega-Sánchez, César Ortega-Santana, Miguel Rubio-Godoy, Dany Montes de Oca-Mira, Edgardo Soriano-Vargas
Ten species of Aeromonas have been previously identified in farmed rainbow trout from Mexico. The aim of the current study was to investigate the pathogenicity of 10 Aeromonas isolates belonging to 10 different Aeromonas species in immersion experimentally-infected rainbow trout fry. Isolates of A. bestiarum, A. hydrophila, A. salmonicida, and A. veronii produced significant mortality (8.8%, 12.2%, 18.8%, and 8.8%, respectively). Isolates of A. caviae and A. sobria produced no significantly mortality (3.3% and 1...
February 13, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28205238/comparative-pharmacokinetics-of-enrofloxacin-in-healthy-and-aeromonas-hydrophila-infected-crucian-carp-carassius-auratus-gibelio
#3
J Fan, Q Shan, J Wang, S Liu, L Li, G Zheng
The comparative pharmacokinetics of enrofloxacin (ENR) and its metabolite ciprofloxacin (CIP) were investigated in healthy and Aeromonas hydrophila-infected crucian carp after a single oral (p.o.) administration at a dose of 10 mg/kg at 25 °C. The plasma concentrations of ENR and of CIP were determined by HPLC. Pharmacokinetic parameters were calculated based on mean ENR concentrations by noncompartmental modeling. In healthy fish, the elimination half-life (T1/2λz ), maximum plasma concentration (Cmax ), time to peak (Tmax ), and area under the concentration-time curve (AUC) values were 64...
February 15, 2017: Journal of Veterinary Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/28182704/subunit-vaccine-candidates-against-aeromonas-salmonicida-in-rainbow-trout-oncorhynchus-mykiss
#4
Moonika Haahr Marana, Louise von Gersdorff Jørgensen, Jakob Skov, Jiwan Kumar Chettri, Andreas Holm Mattsson, Inger Dalsgaard, Per Walter Kania, Kurt Buchmann
Aeromonas salmonicida subsp. salmonicida is the etiological agent of furunculosis and a major fish health problem in salmonid aquaculture worldwide. Injection vaccination with commercial mineral oil-adjuvanted bacterin vaccines has been partly successful in preventing the disease but in Danish rainbow trout (Oncorhynchus mykiss, Walbaum) aquaculture furunculosis outbreaks still occur. In this study we tested the efficacy of experimental subunit vaccines against A. salmonicida infection in rainbow trout. We utilized in silico screening of the proteome of A...
2017: PloS One
https://www.readbyqxmd.com/read/28177792/utilization-of-carbon-sources-by-clinical-isolates-of-i-aeromonas-i
#5
Karoline de Campos Prediger, Monica Surek, Cibelle De Borba Dalagassa, Flávia Emanoelli Araújo de Assis, Mário Sérgio Piantavini, Emanuel E M Souza, Fabio O F O Pedrosa, Sônia Maria de Souza Santos Farah, Dayane Alberton, Cyntia Maria Telles Fadel-Picheth
Bacteria in the genus <i>Aeromonas</i> are primarily aquatic organisms; however, some species can cause diseases in humans, ranging from wound infections to septicemia, of which diarrhea is the most common condition. The ability to use a variety of carbon substrates is advantageous for pathogenic bacteria. Therefore, we used Biolog GN2 microplates to analyze the ability of 103 clinical, predominantly diarrheal, isolates of <i>Aeromonas</i> to use various carbon sources and verified whether among the substrates metabolized by these strains there were some endogenous to the human intestine...
December 22, 2016: Canadian Journal of Microbiology
https://www.readbyqxmd.com/read/28174557/human-driven-microbiological-contamination-of-benthic-and-hyporheic-sediments-of-an-intermittent-peri-urban-river-assessed-from-mst-and-16s-rrna-genetic-structure-analyses
#6
Romain Marti, Sébastien Ribun, Jean-Baptiste Aubin, Céline Colinon, Stéphanie Petit, Laurence Marjolet, Michèle Gourmelon, Laurent Schmitt, Pascal Breil, Marylise Cottet, Benoit Cournoyer
Rivers are often challenged by fecal contaminations. The barrier effect of sediments against fecal bacteria was investigated through the use of a microbial source tracking (MST) toolbox, and by Next Generation Sequencing (NGS) of V5-V6 16S rRNA gene (rrs) sequences. Non-metric multi-dimensional scaling analysis of V5-V6 16S rRNA gene sequences differentiated bacteriomes according to their compartment of origin i.e., surface water against benthic and hyporheic sediments. Classification of these reads showed the most prevalent operating taxonomic units (OTU) to be allocated to Flavobacterium and Aquabacterium...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28167251/neutrophils-exert-protection-in-early-aeromonas-veronii-infections-through-the-clearance-of-both-bacteria-and-dying-macrophages
#7
Jeffrey J Havixbeck, Aja M Rieger, Lucas J Churchill, Daniel R Barreda
Aeromonas veronii is a gram-negative opportunistic pathogen capable of infecting both fish and mammals. Left untreated, natural infection in fish can prove fatal and result in irreparable damage to the aquaculture industry. Neutrophils are essential innate effector cells that play critical roles in pathogen defense. Our aim was to investigate the immunological roles of teleost neutrophils during infection with A. veronii. We began by examining the functional defenses of neutrophils in vitro, where neutrophils efficiently killed the pathogen...
February 3, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28167112/combining-molecular-and-bioprocess-techniques-to-produce-poly-3-hydroxybutyrate-co-3-hydroxyhexanoate-with-controlled-monomer-composition-by-burkholderia-sacchari
#8
Thatiane T Mendonça, Rafaela R Tavares, Lucas G Cespedes, Ruben J Sánchez-Rodriguez, Jan Schripsema, Marilda K Taciro, José G C Gomez, Luiziana F Silva
Biopolymers as polyhydroxyalkanoates (PHA) composed by different co-monomers 3-hydroxybutyrate and 3-hydroxyhexanoate [P(3HB-co-3HHx)] has attracted interest since its properties are similar to low density polyethylene. Burkholderia sacchari produces this copolymer with a very low 3HHx molar fraction, about 2 mol%. B. sacchari mutant (unable to produce polymer) was engineered to host PHA biosynthesis genes (phaPCJ) from Aeromonas sp. In addition, a two-step bioprocess to increase biopolymer production was developed...
February 4, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28166451/serology-in-finfish-for-diagnosis-surveillance-and-research-a-systematic-review
#9
Diana Jaramillo, Edmund J Peeler, Emilie Laurin, Ian A Gardner, Richard J Whittington
Historically, serological tests for finfish diseases have been underused when compared with their use in terrestrial animal health. For years the nonspecific immune response in fish was judged to make serology unreliable and inferior to the direct measurement of agent analytes. We conducted a systematic review of peer-reviewed publications that reported on the development, validation, or application of serological tests for finfish diseases. A total of 168 articles met the screening criteria; most of them were focused on salmonid pathogens (e...
March 2017: Journal of Aquatic Animal Health
https://www.readbyqxmd.com/read/28163702/the-social-life-of-aeromonas-through-biofilm-and-quorum-sensing-systems
#10
REVIEW
Emilie Talagrand-Reboul, Estelle Jumas-Bilak, Brigitte Lamy
Bacteria of the genus Aeromonas display multicellular behaviors herein referred to as "social life". Since the 1990s, interest has grown in cell-to-cell communication through quorum sensing signals and biofilm formation. As they are interconnected, these two self-organizing systems deserve to be considered together for a fresh perspective on the natural history and lifestyles of aeromonads. In this review, we focus on the multicellular behaviors of Aeromonas, i.e., its social life. First, we review and discuss the available knowledge at the molecular and cellular levels for biofilm and quorum sensing...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28159278/the-role-of-microorganisms-in-the-degradation-of-adenosine-triphosphate-atp-in-chill-stored-common-carp-cyprinus-carpio-fillets
#11
Dapeng Li, Longteng Zhang, Sijia Song, Zhiying Wang, Chunli Kong, Yongkang Luo
Biochemical and microbial changes after harvest strongly affect the final quality and shelf life of fish and fish products. In this study, the role of microbes in the degradation of adenosine triphosphate (ATP), and the origin of adenosine monophosphate deaminase (AMPD) and acid phosphatase (ACP) in common carp fillets during different stages of chilled storage (at 4°C) were investigated. The content of ATP, ADP, AMP, IMP, HxR, and Hx, the activity of AMPD and ACP, and the total count of viable, Aeromonas, Pseudomonas, H2S-producing bacteria, and lactic acid bacteria were examined...
June 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28153544/post-translationally-modified-frog-skin-derived-antimicrobial-peptides-are-effective-against-aeromonas-sobria
#12
Vineethkumar Tv, Asha R, Shyla G, Sanil George
Antimicrobial peptides (brevinin1 HYba1 and brevinin1 HYba2) identified from the skin secretion of an endemic frog species of Western Ghats were studied against fish pathogens. Post-translational modifications such as c-terminal amidation and cyclization of the peptides were enhanced on the activity against Aeromonas sobria. Based on the Minimum inhibitory concentration (3 μM), cyclic amidated brevinin Hyba2 was identified as the most promising antimicrobial agent against A. sobria and can be developed further as a lead drug molecule...
January 30, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28145487/the-antibacterial-activities-of-aditoprim-and-its-efficacy-in-the-treatment-of-swine-streptococcosis
#13
Guyue Cheng, Yamei Xu, Xudong Zhu, Shuyu Xie, Liye Wang, Lingli Huang, Haihong Hao, Zhenli Liu, Yuanhu Pan, Dongmei Chen, Yulian Wang, Zonghui Yuan
Aditoprim (ADP) has potential use as an antimicrobial agent in animals. However, its pharmacodynamic properties have not been systematically studied yet. In this study, the in vitro antibacterial activities of ADP and its main metabolites were assayed, and the in vivo antibacterial efficacy of ADP for the treatment of swine streptococcosis was evaluated. It was shown that Salmonella and Streptococcus from swine, Escherichia coli and Salmonella from chickens, E. coli, Streptococcus, Mannheimia, Pasteurella from calves, Streptococcus and Mannheimia from sheep, and E...
February 1, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28138102/alterations-in-peptidoglycan-cross-linking-suppress-the-secretin-assembly-defect-caused-by-mutation-of-gspa-in-the-type-ii-secretion-system
#14
Elizabeth M Vanderlinde, Timothy G Strozen, Sara B Hernández, Felipe Cava, S Peter Howard
: In Gram-negative bacteria, the peptidoglycan (PG) cell wall is a significant structural barrier for outer membrane protein assembly. In Aeromonas hydrophila, outer membrane multimerization of the type II secretion system (T2SS) secretin ExeD requires the function of the inner membrane assembly factor complex ExeAB. The putative mechanism of the complex involves the reorganization of PG and localization of ExeD, whereby ExeA functions by interacting with PG to form a site for secretin assembly and ExeB forms an interaction with ExeD...
January 30, 2017: Journal of Bacteriology
https://www.readbyqxmd.com/read/28137507/construction-and-evaluation-of-an-edwardsiella-tarda-dna-vaccine-encoding-outer-membrane-protein-c
#15
Fuguo Liu, Xiaoqian Tang, Xiuzhen Sheng, Jing Xing, Wenbin Zhan
Outer membrane protein C is a porin that resides in the outer membrane, and it has been identified as an antigenic protein in many bacteria, such as Escherichia coli, Salmonella typhi, Aeromonas hydrophila and Edwardsiella tarda. In the present work, we aimed at evaluating the immune protective potential of E. tarda OmpC as a DNA vaccine. For this purpose, a recombinant DNA plasmid encoding OmpC (pCG-OmpC) gene was constructed and its vaccine potential was analyzed in a flounder (Paralichthys olivaceus) model...
January 27, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28135311/transcriptome-analysis-reveals-comprehensive-insights-into-the-early-immune-response-of-large-yellow-croaker-larimichthys-crocea-induced-by-trivalent-bacterial-vaccine
#16
Xin Zhang, Yinnan Mu, Pengfei Mu, Jingqun Ao, Xinhua Chen
Vaccination is an effective and safe strategy for combating bacterial diseases in fish, but the mechanisms underlying the early immune response after vaccination remain to be elucidated. In the present study, we used RNA-seq technology to perform transcriptome analysis of spleens from large yellow croaker (Larimichthys crocea) induced by inactivated trivalent bacterial vaccine (Vibrio parahaemolyticus, Vibrio alginolyticus and Aeromonas hydrophila). A total of 2,789 or 1,511 differentially expressed genes (DEGs) were obtained at 24 or 72 h after vaccination, including 1,132 or 842 remarkably up-regulated genes and 1,657 or 669 remarkably down-regulated genes, respectively...
2017: PloS One
https://www.readbyqxmd.com/read/28128887/synthesis-of-medium-chain-length-polyhydroxyalkanoate-homopolymers-random-copolymers-and-block-copolymers-by-an-engineered-strain-of-pseudomonas-entomophila
#17
Ying Wang, Ahleum Chung, Guo-Qiang Chen
Medium-chain-length polyhydroxyalkanoates (mcl-PHAs), widely used in medical area, are commonly synthesized by Pseudomonas spp. This study tries to use β-oxidation pathways engineered P. entomophila to achieve single source of a series of mcl-monomers for microbial production of PHA homopolymers. The effort is proven successful for the first time to obtain a wide range of mcl-PHA homopolymers from engineered P. entomophila LAC23 grown on various fatty acids, respectively, ranging from poly(3-hydroxyheptanoate) to poly(3-hydroxytetradecanoate)...
January 27, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/28127946/ribose-operon-repressor-rbsr-contributes-to-the-adhesion-of-aeromonas-hydrophila-to-anguilla-japonica-mucus
#18
Guifang Lin, Wenbo Chen, Yongquan Su, Yingxue Qin, Lixing Huang, Qingpi Yan
The characterization of adhesion between pathogenic bacteria and the host is critical. Pathogenic Aeromonas hydrophila was shown to adhere in vitro to the mucus of Anguilla japonica. To further investigate the adhesion mechanisms of A. hydrophila, a mini-Tn10 transposon mutagenesis system was used to generate an insertion mutant library by cell conjugation. Seven mutants that were impaired in adhesion to mucus were selected out of 332 individual colonies, and mutant M196 was the most severely impaired strain...
January 27, 2017: MicrobiologyOpen
https://www.readbyqxmd.com/read/28126555/bactericidal-activity-of-fish-galectin-4-derived-membrane-binding-peptide-tagged-with-oligotryptophan
#19
Abirami Arasu, Venkatesh Kumaresan, Munuswamy-Ramanujam Ganesh, Mukesh Pasupuleti, Mariadhas Valan Arasu, Naif Abdullah Al-Dhabi, Jesu Arockiaraj
Galectins belong to the family of galactoside-binding proteins which act as pathogen recognition receptors by recognizing and binding to the carbohydrate present in the bacterial membranes. In this study, a Galectin-4 sequence was identified from the constructed cDNA library of Channa striatus and its structural features were reported. Gene expression analysis revealed that CsGal4 was highly expressed in liver and strongly induced by Epizootic Ulcerative Syndrome (EUS) causing pathogens such as Aphanomyces invadans, Aeromonas hydrophila and a viral analogue, poly I:C...
January 23, 2017: Developmental and Comparative Immunology
https://www.readbyqxmd.com/read/28124783/diversity-of-culturable-bacterial-communities-in-the-intestinal-tracts-of-goldfish-carassius-auratus-and-their-ability-to-produce-n-acyl-homoserine-lactone
#20
Haruo Sugita, Shun Kitao, Satoshi Narisawa, Ryosuke Minamishima, Shiro Itoi
Intestinal bacteria isolated from goldfish (Carassius auratus) were identified based on 16 ribosomal RNA (rRNA) gene sequences and screened for their ability to produce N-acyl homoserine lactone (AHL), an autoinducer of the quorum sensing (QS) system. The 230 aerobes/facultative anaerobes that were isolated comprised members of the genera Aeromonas (184 isolates), Citrobacter (11), Enterobacter (2), Shewanella (28), Vagococcus (1), and Vibrio (4). Among these genera, the two most abundant species were Aeromonas veronii (163 isolates) and Shewanella xiamenensis (27)...
January 26, 2017: Folia Microbiologica
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