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Aeromonas hydrophila

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https://www.readbyqxmd.com/read/27907048/chemical-defence-in-a-millipede-evaluation-and-characterization-of-antimicrobial-activity-of-the-defensive-secretion-from-pachyiulus-hungaricus-karsch-1881-diplopoda-julida-julidae
#1
Slaviša Stanković, Ivica Dimkić, Ljubodrag Vujisić, Sofija Pavković-Lučić, Zvezdana Jovanović, Tatjana Stević, Ivana Sofrenić, Bojan Mitić, Vladimir Tomić
The chemical defence of the millipede Pachyiulus hungaricus is reported in the present paper, in which a chemical characterization is given and antimicrobial activity is determined. In total, independently of sex, 44 compounds were identified. All compounds belong to two groups: quinones and pentyl and hexyl esters of long-chain fatty acids. The relative abundances of quinones and non-quinones were 94.7% vs. 5.3% (males) and 87.3% vs. 12.7% (females), respectively. The two dominant quinones in both sexes were 2-methyl-1,4,-benzoquinone and 2-methoxy-3-methyl-1,4-benzoquinone...
2016: PloS One
https://www.readbyqxmd.com/read/27903452/%C3%AE-glucan-induced-cortisol-levels-improve-the-early-immune-response-in-matrinx%C3%A3-brycon-amazonicus
#2
Luz N Franco Montoya, Talísia P Martins, Rodrigo Y Gimbo, Fábio S Zanuzzo, Elisabeth C Urbinati
This study investigated the role of endogenous cortisol on the innate immune response in matrinxã (Brycon amazonicus) fed with β-glucan, prior to and after stressor exposure and bacterial challenge. For this, we evaluated the serum cortisol and plasma glucose levels, the serum lysozyme levels, the hemolytic activity of the complement system, and the respiratory activity of leukocytes, as well as the number of circulating erythrocytes and leukocytes of fish fed during 15 days with diets containing β-glucan 0...
November 27, 2016: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/27899335/design-and-characterization-of-plasmids-encoding-antigenic-peptides-of-aha1-from-aeromonas-hydrophila-as-prospective-fish-vaccines
#3
Pradipta R Rauta, Bismita Nayak, Gabriel A Monteiro, Marília Mateus
The current investigation aimed at designing DNA vaccines against Aeromonas hydrophila infections. The DNA vaccine candidates were designed to express two antigenic outer membrane protein (Aha1) peptides and to be delivered by a nanoparticle-based delivery system. Gene sequences of conserved regions of antigenic Aha1 [aha1(211-381), aha1(211-381)opt, aha1(703-999) and aha1(703-999)opt] were cloned into pVAX-GFP expression vector. The selected DNA vaccine candidates were purified from E. coli DH5α and transfected into Chinese hamster ovary cells...
November 27, 2016: Journal of Biotechnology
https://www.readbyqxmd.com/read/27898025/identification-and-characterization-of-micrornas-in-the-liver-of-blunt-snout-bream-megalobrama-amblycephala-infected-by-aeromonas-hydrophila
#4
Lei Cui, Hongtao Hu, Wei Wei, Weimin Wang, Hong Liu
MicroRNAs (miRNAs) are small RNA molecules that play key roles in regulation of various biological processes. In order to better understand the biological significance of miRNAs in the context of Aeromonas hydrophila infection in Megalobrama amblycephala, small RNA libraries obtained from fish liver at 0 (non-infection), 4, and 24 h post infection (poi) were sequenced using Illumina deep sequencing technology. A total of 11,244,207, 9,212,958, and 7,939,157 clean reads were obtained from these three RNA libraries, respectively...
November 25, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27888132/vitamin-e-deficiency-depressed-fish-growth-disease-resistance-and-the-immunity-and-structural-integrity-of-immune-organs-in-grass-carp-ctenopharyngodon-idella-referring-to-nf-%C3%AE%C2%BAb-tor-and-nrf2-signaling
#5
Jia-Hong Pan, Lin Feng, Wei-Dan Jiang, Pei Wu, Sheng-Yao Kuang, Ling Tang, Yong-An Zhang, Xiao-Qiu Zhou, Yang Liu
This study investigated the effects of dietary vitamin E on growth, disease resistance and the immunity and structural integrity of head kidney, spleen and skin in grass carp (Ctenopharyngodon idella). The fish were fed six diets containing graded levels of vitamin E (0, 45, 90, 135, 180 and 225 mg/kg diet) for 10 weeks. Subsequently, a challenge test was conducted by injection of Aeromonas hydrophila. The results showed that compared with optimal vitamin E supplementation, vitamin E deficiency caused depressed growth, poor survival rates and increased skin lesion morbidity in grass carp...
November 22, 2016: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/27885558/aeromonas-and-plesiomonas-species-from-scarlet-ibis-eudocimus-ruber-and-their-environment-monitoring-antimicrobial-susceptibility-and-virulence
#6
Débora Souza Collares Maia Castelo-Branco, Aline Lobão da Silva, Frederico Ozanan Barros Monteiro, Glaucia Morgana de Melo Guedes, Jamille Alencar Sales, Jonathas Sales de Oliveira, José Erisvaldo Maia Junior, Stefânia Araújo Miranda, José Júlio Costa Sidrim, Lucas Pereira de Alencar, Raimunda Sâmia Nogueira Brilhante, Rossana de Aguiar Cordeiro, Tereza de Jesus Pinheiro Gomes Bandeira, Waldemiro de Aquino Pereira Neto, Marcos Fábio Gadelha Rocha
The present study aimed at evaluating the role of captive scarlet ibises (Eudocimus ruber) and their environment as reservoirs of Aeromonas spp. and Plesiomonas spp., and analyzing the in vitro antimicrobial susceptibility and virulence of the recovered bacterial isolates. Thus, non-lactose and weak-lactose fermenting, oxidase positive Gram-negative bacilli were recovered from cloacal samples (n = 30) of scarlet ibises kept in a conservational facility and from water samples (n = 30) from their environment...
November 24, 2016: Antonie Van Leeuwenhoek
https://www.readbyqxmd.com/read/27881349/-diagnosis-of-drowning-by-detecting-gyrb-and-16s-rrna-genes-of-aeromonas-hydrophila-using-pcr-capillary-electrophoresis
#7
Bai-Sheng Mai, Qu-Yi Xu, Chao Liu, Jian Zhao, Ya-Li Han
OBJECTIVE: To establish a method for diagnosis of freshwater drowning by amplifying gyrB and 16S rRNA genes of Aeromonas hydrophila using PCR coupled with capillary electrophoresis (CE). METHODS: DNA samples were extracted from human, 18 planktons (including Candida albicans, Aeromonas hydrophila, and 16 species of algae), and 30 cases of tissue samples (including the lung, liver, and kidney, all examined with microwave digestion-vacuum filtration-automated scanning electron microscopy) from human cadavers, including 28 freshwater drowning victims and 2 with natural death...
November 20, 2016: Nan Fang Yi Ke da Xue Xue Bao, Journal of Southern Medical University
https://www.readbyqxmd.com/read/27876624/differences-in-structure-and-changes-in-gene-regulation-of-murrel-molecular-chaperone-hsp-family-during-epizootic-ulcerative-syndrome-eus-infection
#8
Akila Sathyamoorthy, Mukesh Kumar Chaurasia, Mariadhas Valan Arasu, Naif Abdullah Al-Dhabi, Ramasamy Harikrishnan, Jesu Arockiaraj
Heat shock proteins (HSPs) are immunogenic, ubiquitous class of molecular chaperones, which are induced in response to various environmental and microbial stressful conditions. It plays a vital role in maintaining cellular protein homeostasis in eukaryotic cells. In this study, we described a comprehensive comparative data by bioinformatics approach on three different full length cDNA sequences of HSP family at molecular level. The cDNA sequences of three HSPs were identified from constructed cDNA library of Channa striatus and named as CsCPN60, CsHSP60 and CsHSP70...
November 20, 2016: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/27867114/serine-protease-inhibitor-kazal-type-2-is-expressed-in-the-male-reproductive-tract-of-carp-with-a-possible-role-in-antimicrobial-protection
#9
Mariola A Dietrich, Mariola Słowińska, Halina Karol, Mikołaj Adamek, Dieter Steinhagen, Anna Hejmej, Barbara Bilińska, Andrzej Ciereszko
The presence of the low-molecular-mass serine protease inhibitor Kazal-type (Spink) is a characteristic feature of vertebrate semen. Its main function is control of the serine protease in the acrosome, acrosin. Here we showed for the first time that Spink is present in the seminal plasma of carp, which have anacrosomal spermatozoa. Using a three-step isolation procedure that consisted in gel filtration and RP-HPLC and re-RP-HPLC, we isolated this inhibitor and identified it as serine protease inhibitor Kazal-type 2 (Spink2), a reproductive-derived member of the Spink family...
November 17, 2016: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/27858184/pathogenic-mechanisms-of-actin-cross-linking-toxins-peeling-away-the-layers
#10
Elena Kudryashova, David B Heisler, Dmitri S Kudryashov
Actin cross-linking toxins are produced by Gram-negative bacteria from Vibrio and Aeromonas genera. The toxins were named actin cross-linking domains (ACD), since the first and most of the subsequently discovered ACDs were found as effector domains in larger MARTX and VgrG toxins. Among recognized human pathogens, ACD is produced by Vibrio cholerae, Vibrio vulnificus, and Aeromonas hydrophila. Upon delivery to the cytoplasm of a host cell, ACD covalently cross-links actin monomers into non-polymerizable actin oligomers of various lengths...
November 18, 2016: Current Topics in Microbiology and Immunology
https://www.readbyqxmd.com/read/27856595/draft-genome-sequence-of-pseudomonas-mosselii-gil3-isolated-from-catfish-and-antagonistic-against-hypervirulent-aeromonas-hydrophila
#11
Dunhua Zhang, De-Hai Xu, Junqiang Qiu, Cody R Rasmussen-Ivey, Mark R Liles, Benjamin H Beck
Pseudomonas mosselii Gil3 was isolated from a catfish that survived from lethal challenge with hypervirulent Aeromonas hydrophila (vAh). When assayed in vitro, the bacterium showed antagonism against vAh. Sequence analysis revealed that the genome of P. mosselii Gil3 encodes numerous aromatic metabolism pathways and proteins for biosynthesis of antimicrobial compounds.
November 17, 2016: Genome Announcements
https://www.readbyqxmd.com/read/27853553/the-role-of-three-heat-shock-protein-genes-in-the-immune-response-to-aeromonas-hydrophila-challenge-in-marbled-eel-anguilla-marmorata
#12
Fenfei Liang, Guosong Zhang, Shaowu Yin, Li Wang
Heat shock proteins (HSPs) are highly conserved molecular chaperones that play critical roles in both innate and adaptive immunity. However, little information about HSPs from marbled eel Anguilla marmorata is known. In this study, the full-length Amhsp90 (2527 bp), Amhsp70 (2443 bp) and Amhsc70 (2247 bp) were first cloned from A. marmorata, using rapid amplification of cDNA ends, containing open reading frames of 2181, 1932 and 1950 bp in length, and encoding proteins with 726, 643 and 649 amino acids, respectively...
October 2016: Royal Society Open Science
https://www.readbyqxmd.com/read/27832917/immune-response-characterization-and-vaccine-potential-of-a-recombinant-chimera-comprising-b-cell-epitope-of-aeromonas-hydrophila-outer-membrane-protein-c-and-ltb
#13
Mahima Sharma, Aparna Dixit
Aeromonas hydrophila is one of the most virulent fish pathogens, causing colossal economic losses to the aquaculture industry annually. The absence of a safe and effective vaccine makes it very difficult to control this infection. Outer membrane proteins have been widely illustrated to confer protective immunity against a broad spectrum of gram negative bacteria. In the current study, we have analyzed the ability of B-cell epitopes of A. hydrophila's outer membrane protein C (OmpC) to confer protection against bacterial virulence...
December 7, 2016: Vaccine
https://www.readbyqxmd.com/read/27830678/-cloning-and-expression-analysis-of-two-pro-inflammatory-cytokines-il-1%C3%AE-and-its-receptor-il-1r2-in-the-asian-swamp-eel-monopterus-albus
#14
Q Q Xu, P Xu, J W Zhou, T S Pan, R Tuo, K Ai, D Q Yang
Interleukin-1β (IL-1β) is the prototypic pro-inflammatory cytokine, whose functions are mediated through interaction with its receptors (IL-1R1 and IL-1R2). Herein, we cloned the full-length cDNA and genomic DNA of IL-1β and IL-1R2 in the Asian swamp eel (Monopterus albus). The eel IL-1β cDNA encodes a putative polypeptide of 246 amino acids. The protein sequence includes a typical IL-1 family signature, but lacked an interleukin-converting enzyme cleavage site. The genomic DNA of eel IL-1β was 2520 bp and comprised five exons and four introns...
September 2016: Molekuliarnaia Biologiia
https://www.readbyqxmd.com/read/27818993/molecular-cloning-characterization-and-mrna-expression-of-hemocyanin-subunit-in-oriental-river-prawn-macrobrachium-nipponense
#15
Youqin Kong, Liqiao Chen, Zhili Ding, Jianguang Qin, Shengming Sun, Ligai Wang, Jinyun Ye
Hemocyanin is a copper-containing protein with immune function against disease. In this study, a hemocyanin subunit named MnHc-1 was cloned from Macrobrachium nipponense. The full-length cDNA of MnHc-1 was 2,163 bp with a 2,028-bp open reading frame (ORF) encoding a polypeptide of 675 amino acids. The MnHc-1 mRNA was expressed in the hepatopancreas, gill, hemocytes, intestine, ovary, and stomach, with the highest level in the hepatopancreas. In the infection trial, the MnHc-1 mRNA transcripts in the hemocytes were significantly downregulated at 3 h after injection of Aeromonas hydrophila and then upregulated at 6 h and 12 h, followed by a gradual recovery from 24 to 48 h...
2016: International Journal of Genomics
https://www.readbyqxmd.com/read/27815199/dietary-protein-enhances-non-specific-immunity-anti-oxidative-capability-and-resistance-to-aeromonas-hydrophila-in-labeo-rohita-fingerlings-pre-exposed-to-short-feed-deprivation-stress
#16
Sona Yengkokpam, Dipesh Debnath, N P Sahu, A K Pal, K K Jain, Kartik Baruah
Present experiment was conducted to study the effect of dietary protein levels on growth, immunity and anti-oxidative status of Labeo rohita fingerlings during feed deprivation followed by refeeding. Fish (5.44 ± 0.10 g) were deprived of feed for 3 weeks and then re-fed to satiation for 5 weeks with one of the diets containing 25 (25P), 30 (30P), 35 (35P) or 40 (40P) percent crude protein (CP) level. In addition to these groups, a control group (C) was also maintained by feeding to satiation level twice daily with a diet containing 30% CP throughout the experimental period...
December 2016: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/27810527/chitin-degradation-and-electricity-generation-by-aeromonas-hydrophila-in-microbial-fuel-cells
#17
Shan-Wei Li, Hui He, Raymond J Zeng, Guo-Ping Sheng
Chitin is one of the most abundant biopolymers in nature and the main composition of shrimp and crab shells (usually as food wastes). Thus it is essential to investigate the potential of degrading chitin for energy recovery. This study investigated the anaerobic degradation of chitin by Aeromonas hydrophila, a chitinolytic and popular electroactive bacterium, in both fermentation and microbial fuel cell (MFC) systems. The primary chitin metabolites produced in MFC were succinate, lactate, acetate, formate, and ethanol...
October 27, 2016: Chemosphere
https://www.readbyqxmd.com/read/27803692/classification-of-a-hypervirulent-aeromonas-hydrophila-pathotype-responsible-for-epidemic-outbreaks-in-warm-water-fishes
#18
Cody R Rasmussen-Ivey, Mohammad J Hossain, Sara E Odom, Jeffery S Terhune, William G Hemstreet, Craig A Shoemaker, Dunhua Zhang, De-Hai Xu, Matt J Griffin, Yong-Jie Liu, Maria J Figueras, Scott R Santos, Joseph C Newton, Mark R Liles
Lineages of hypervirulent Aeromonas hydrophila (vAh) are the cause of persistent outbreaks of motile Aeromonas septicemia in warm-water fishes worldwide. Over the last decade, this virulent lineage of A. hydrophila has resulted in annual losses of millions of tons of farmed carp and catfish in the People's Republic of China and the United States (US). Multiple lines of evidence indicate US catfish and Asian carp isolates of A. hydrophila affiliated with sequence type 251 (ST251) share a recent common ancestor...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27794459/plant-polysaccharides-used-as-immunostimulants-enhance-innate-immune-response-and-disease-resistance-against-aeromonas-hydrophila-infection-in-fish
#19
Erlong Wang, Xia Chen, Kaiyu Wang, Jun Wang, Defang Chen, Yi Geng, Weimin Lai, Xianchao Wei
Plant polysaccharides (PPS) are an important medicinal plant product, and play a major role in preventing and controlling infectious microbes in aquaculture. The present study investigated the effect of three PPS; Ficus carica polysaccharides (FCPS), Radix isatidis polysaccharides (RIPS), and Schisandra chinensis polysaccharides (SCPS), used as feed additives, on innate immune responses and disease resistance against Aeromonas hydrophila in crucian carp. Results show that crucian carp fed with these PPS showed significant (p < 0...
December 2016: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/27782086/laurus-nobilis-zingiber-officinale-and-anethum-graveolens-essential-oils-composition-antioxidant-and-antibacterial-activities-against-bacteria-isolated-from-fish-and-shellfish
#20
Mejdi Snuossi, Najla Trabelsi, Sabrine Ben Taleb, Ameni Dehmeni, Guido Flamini, Vincenzo De Feo
Several bacterial strains were isolated from wild and reared fish and shellfish. The identification of these strains showed the dominance of the Aeromonas hydrophila species in all seafood samples, followed by Staphylococcus spp., Vibrio alginolyticus, Enterobacter cloacae, Klebsiella ornithinolytica, Klebsiella oxytoca and Serratia odorifera. The isolates were studied for their ability to produce exoenzymes and biofilms. The chemical composition of the essential oils from Laurus nobilis leaves, Zingiber officinale rhizomes and Anethum graveolens aerial parts was studied by GC and GC/MS...
October 22, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
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