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Aeromonas hydrophila

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https://www.readbyqxmd.com/read/28098047/vitamin-a-deficiency-suppresses-fish-immune-function-with-differences-in-different-intestinal-segments-the-role-of-transcriptional-factor-nf-%C3%AE%C2%BAb-and-p38-mitogen-activated-protein-kinase-signalling-pathways
#1
Li Zhang, Lin Feng, Wei-Dan Jiang, Yang Liu, Pei Wu, Sheng-Yao Kuang, Ling Tang, Wu-Neng Tang, Yong-An Zhang, Xiao-Qiu Zhou
The present study investigated the effects of dietary vitamin A on immune function in the proximal intestine (PI), mid intestine (MI) and distal intestine (DI) of young grass carp (Ctenopharyngodon idella). Fish were fed graded levels of dietary vitamin A for 10 weeks, and then a challenge test using an injection of Aeromonas hydrophila was conducted for 14 d. The results showed that, compared with the optimum vitamin A level, vitamin A deficiency significantly decreased fish growth performance, increased enteritis morbidity, decreased intestinal innate humoral immune response and aggravated intestinal inflammation...
January 18, 2017: British Journal of Nutrition
https://www.readbyqxmd.com/read/28094307/a-transcriptome-analysis-focusing-on-inflammation-related-genes-of-grass-carp-intestines-following-infection-with-aeromonas-hydrophila
#2
Xuehong Song, Xiaolong Hu, Bingyao Sun, Yunxuan Bo, Kang Wu, Lanying Xiao, Chengliang Gong
Inflammation is a protective response that is implicated in bacterial enteritis and other fish diseases. The inflammatory mechanisms behind Aeromonas hydrophila infections in fish remain poorly understood. In this study, we performed a de novo grass carp transcriptome assembly using Illumina's Solexa sequencing technique. On this basis we carried out a comparative analysis of intestinal transcriptomes from A. hydrophila-challenged and physiological saline solution (PSS/mock) -challenged fish, and 315 genes were up-regulated and 234 were down-regulated in the intestines infected with A...
January 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28088128/structure-of-the-o-specific-polysaccharide-from-the-lipopolysaccharide-of-aeromonas-hydrophila-strain-k691-containing-4-acetamido-4-6-dideoxy-d-glucose
#3
Katarzyna Pakiet, Anna Turska-Szewczuk, Magdalena A Karas, Agnieszka Pekala, Hubert Pietras
The O-specific polysaccharide (OPS) was isolated from the lipopolysaccharide of Aeromonas hydrophila strain K691 and studied by chemical methods and (1)H and (13)C NMR spectroscopy, including 2D (1)H,(1)H COSY, TOCSY, NOESY, (1)H-detected heteronuclear (1)H,(13)C HSQC, and HMBC experiments. It was found that the O-specific polysaccharide was built up of pentasaccharide repeating units composed of β-GlcpNAc, 2-O-acetylated α-Rhap, and β-Quip4NAc residues. The following structure of the OPS was established: →3)-α-l-Rha2OAc-(1→3)-β-d-GlcNAc-(1→3)-α-l-Rha2OAc-(1→3)-β-d-GlcNAc-(1→2)-β-d-Qui4NAc-(1→...
December 23, 2016: Carbohydrate Research
https://www.readbyqxmd.com/read/28070529/low-prevalence-of-aeromonas-hydrophilain-infectious-diarrhea-samples-of-pediatric-patients-in-arak-iran
#4
Abbasi Elnaz, Khansari-Nejad Behzad, Abtahi Hamid, Akbari Majid, Ghaznavi-Rad Ehsanollah
BACKGROUND: Aeromonashydrophila (A. hydrophila) is an aquatic bacterium that can cause a spectrum of infectious diseases, including both gastrointestinal and extraintestinal infections. Due to the high rate of diarrheal infections in pediatric patients in central Iran, this study was designed to determine the frequency of A. hydrophila in diarrhea samples from children in this region. METHODS: In this descriptive cross-sectional study, diarrheal stool specimens were collected from 200 children admitted between February and October of 2015 to educational and medical centers affiliated with the Arak University of Medical Sciences...
October 2016: Reports of Biochemistry & Molecular Biology
https://www.readbyqxmd.com/read/28065604/characterization-of-galectin-1-from-chinese-giant-salamanders-andrias-davidianus-and-its-involvements-during-immune-response
#5
Hui Yang, Qingjing Lan, Ranran Liu, Dan Cui, Haixia Liu, Dongmei Xiong, Fenggang Li, Xiaolin Liu, Lixin Wang
Galectins are considered as a multifunctional protein which play essential roles in cell adhesion and apoptosis, inflammation, tumor progression and immune response. In spite of extensive studies of galectin importance in immune system among different animals, few studies have been devoted to their functions in amphibian. In the present study, we characterized one proto type of galectin (named AdGal1) from Chinese giant salamander Andrias davidianus and studied its function in immune response. AdGal1 cDNA possesses an open reading frame of 598 bp, which encodes a putative galectin of 134 amino acids containing one carbohydrate recognition domains (CRDs)...
January 5, 2017: Developmental and Comparative Immunology
https://www.readbyqxmd.com/read/28057113/-monitoring-and-research-on-pathogen-spectrum-in-patients-with-acute-diarrhea-from-sentinel-hospital-of-zhejiang-province-during-2009-to-2014
#6
S F Zheng, F Yu, X Chen, D W Cui, X Z Yang, G L Xie, Y Y Wang, J X Yu, Z J Li, Y Chen
Objective: To explore pathogen spectrum constitution of acute diarrhea in outpatient and emergency of Zhejiang Province, and provide basis for treatment, prevention and control of the disease. Methods: During January 2009 to December 2014, we selected seven sentinel hospitals in different regions of Zhejiang, monitored and researched on pathogen spectrum in patients with acute diarrhea from outpatient and emergency. We recorded patients' personal basic information, the main symptoms and signs, and collected stool samples (5 g)...
December 6, 2016: Zhonghua Yu Fang Yi Xue za Zhi [Chinese Journal of Preventive Medicine]
https://www.readbyqxmd.com/read/28032485/clinical-and-therapeutic-implications-of-aeromonas-bacteremia-14-years-nation-wide-experiences-in-korea
#7
Ji Young Rhee, Dong Sik Jung, Kyong Ran Peck
BACKGROUND: To elucidate the clinical presentation, antimicrobial susceptibility, and prognostic factors of monomicrobial Aeromonas bacteremia in order to determine the most effective optimal therapy. MATERIALS AND METHODS: We reviewed the medical records of Aeromonas bacteremia patients for the period January 2000 to December 2013 in a retrospective multi-center study. RESULTS: A total of 336 patient records were reviewed, with 242 having community-acquired bacteremia...
December 2016: Infection & Chemotherapy
https://www.readbyqxmd.com/read/28032191/chitin-degradation-and-utilization-by-virulent-aeromonas-hydrophila-strain-ml10-51k
#8
Dunhua Zhang, De-Hai Xu, Junqiang Qiu, Cody R Rasmussen-Ivey, Mark R Liles, Benjamin H Beck
Virulent Aeromonas hydrophila (vAh) is one of the most important bacterial pathogens that causes persistent outbreaks of motile Aeromonas septicemia in warm-water fishes. The survivability of this pathogen in aquatic environments is of great concern. The aim of this study was to determine the capability of the vAh strain ML10-51K to degrade and utilize chitin. Genome-wide analysis revealed that ML10-51K encodes a suite of proteins for chitin metabolism. Assays in vitro showed that four chitinases, one chitobiase and one chitin-binding protein were secreted extracellularly and participated in chitin degradation...
December 28, 2016: Archives of Microbiology
https://www.readbyqxmd.com/read/28027983/effect-of-ammonia-n-and-pathogen-challenge-on-complement-component-8%C3%AE-and-8%C3%AE-expression-in-the-darkbarbel-catfish-pelteobagrus-vachellii
#9
Chuanjie Qin, Ting Shao, Daxian Zhao, Huiguo Duan, Zhengyong Wen, Dengyue Yuan, Huatao Li, Zemin Qi
The complement components C8α and C8β mediate the formation of the membrane attack complex (MAC) to resist pathogenic bacteria and play important roles in innate immunity. Full-length complement C8α (Pv-C8α) and C8β (Pv-C8β) cDNA were identified in the darkbarbel catfish Pelteobagrus vachellii, and their mRNA expression levels were analyzed after ammonia-N and pathogen treatment. The Pv-C8α gene contained 1983 bp, including a 1794-bp open reading frame (ORF) encoding 598 amino acids. The Pv-C8β gene contained 1952 bp, including a 1761-bp ORF encoding 587 amino acids...
December 24, 2016: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28018866/bacillus-sp-qsi-1-modulate-quorum-sensing-signals-reduce-aeromonas-hydrophila-level-and-alter-gut-microbial-community-structure-in-fish
#10
Shuxin Zhou, An Zhang, Hongping Yin, Weihua Chu
Quorum sensing (QS) is a cell density dependent process that enables bacteria to communicate with each other based on the production, secretion and sensing of the auto-inducer molecules and then subsequently regulate virulence associated gene expression. Interrupting quorum sensing may represent a novel alternative approach to combat bacterial pathogen. Several bacteria can produce quorum quenching (QQ) enzymes. However, the role of QQ bacteria in shaping the microbiota and the level of N-acyl-homoserine lactones (AHLs, a prevalent type of QS molecules) producing bacteria remains largely unknown...
2016: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28018865/catecholamine-stimulated-growth-of-aeromonas-hydrophila-requires-the-tonb2-energy-transduction-system-but-is-independent-of-the-amonabactin-siderophore
#11
Yuhao Dong, Jin Liu, Maoda Pang, Hechao Du, Nannan Wang, Furqan Awan, Chengping Lu, Yongjie Liu
The growth-stimulating effects of catecholamine stress hormones have been demonstrated in many pathogens. However, catecholamine-induced growth and its underlying mechanisms remain poorly understood in Aeromonas hydrophila. The present study sought to demonstrate that norepinephrine (NE), epinephrine (Epi), dopamine (Dopa), and L-dopa stimulate the growth of A. hydrophila in iron-restricted media containing serum. NE exhibited the strongest growth stimulation, which could be blocked by adrenergic antagonists...
2016: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28018316/leveraging-the-attributes-of-mucor-hiemalis-derived-silver-nanoparticles-for-a-synergistic-broad-spectrum-antimicrobial-platform
#12
Nafe Aziz, Rishikesh Pandey, Ishan Barman, Ram Prasad
Driven by the need to engineer robust surface coatings for medical devices to prevent infection and sepsis, incorporation of nanoparticles has surfaced as a promising avenue to enhance non-fouling efficacy. Microbial synthesis of such nanoscale metallic structures is of substantive interest as this can offer an eco-friendly, cost-effective, and sustainable route for further development. Here we present a Mucor hiemalis-derived fungal route for synthesis of silver nanoparticles, which display significant antimicrobial properties when tested against six pathological bacterial strains (Klebsiella pneumoniae, Pseudomonas brassicacearum, Aeromonas hydrophila, Escherichia coli, Bacillus cereus, and Staphylococcus aureus) and three pathological fungal strains (Candida albicans, Fusarium oxysporum, and Aspergillus flavus)...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28017903/characterization-and-expression-analysis-of-an-intelectin-gene-from-megalobrama-amblycephala-with-excellent-bacterial-binding-and-agglutination-activity
#13
Zhujin Ding, Xiaoheng Zhao, Qifeng Zhan, Lei Cui, Qianhui Sun, Li Lin, Weimin Wang, Hong Liu
Intelectin is a recently discovered lectin that plays vital roles in the innate immune response, iron metabolism and early embryogenesis. The structure, expression pattern and function of intelectin in mammals and amphibians have been well studied, while not well known in fish. In this study, we cloned a intelectin (MamINTL) gene from blunt snout bream (Megalobrama amblycephala), examined its expression patterns and explored its roles in innate immune response. The MamINTL cDNA encoded 312 amino acids, with a pro-protein of 34 kDa...
December 22, 2016: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28009010/structural-insights-on-pha-binding-protein-phap-from-aeromonas-hydrophila
#14
Hongyu Zhao, Hui Wei, Xi Liu, Zhenyu Yao, Manyu Xu, Daixu Wei, Jiawei Wang, Xinquan Wang, Guo-Qiang Chen
Phasins or PhaPs are a group of amphiphilic proteins that are found attached to the surface of microbial polyhydroxyalkanoate (PHA) granules. They have both structural and regulatory functions and can affect intracellular PHA accumulation and mediate protein folding. The molecular basis for the diverse functions of the PhaPs has not been fully understood due to the lack of the structural knowledge. Here we report the structural and biochemical studies of the PhaP cloned from Aeromonas hydrophila (PhaPAh), which is utilized in protein and tissue engineering...
December 23, 2016: Scientific Reports
https://www.readbyqxmd.com/read/28001222/secondary-bacterial-isolates-from-previously-untreated-buruli-ulcer-lesions-and-their-antibiotic-susceptibility-patterns-in-southern-nigeria
#15
Moses Chibueze Anyim, Anthony Obiamaka Meka, Joseph Ngozi Chukwu, Charles Chukwunalu Nwafor, Daniel Chukwunweolu Oshi, Nelson Okechukwu Madichie, Ngozi Ekeke, Chukwuka Alphonsus, Obinna Mbah, Chinenye Nwaekpe, Martin Njoku, Dare Fakiyesi, Vitalis Ulodiaku, Ignatius Ejiofor, Adeniyi Hakeem Bisiriyu, Kingsley Nnanna Ukwaja
INTRODUCTION: Mycolactones, secreted by Mycobacterium ulcerans, were previously believed to prevent super infection in Buruli ulcer lesions. However, little is known about secondary bacterial infections in these lesions. This study evaluated contaminating bacterial flora and their antibiotic susceptibility patterns in cases of previously untreated Buruli ulcer disease from three states in Southern Nigeria. METHODS: A prospective analysis was conducted between January and June of 2015 using wound swabs from eligible patients with Buruli ulcer disease, confirmed by quantitative-polymerase chain reaction, with active ulcers...
November 2016: Revista da Sociedade Brasileira de Medicina Tropical
https://www.readbyqxmd.com/read/27992801/development-of-a-colloidal-gold-immunochromatographic-strip-for-rapid-detection-of-streptococcus-agalactiae-in-tilapia
#16
Wu Wen-de, Li Min, Chen Ming, Li Li-Ping, Wang Rui, Chen Hai-Lan, Chen Fu-Yan, Mi Qiang, Liang Wan-Wen, Chen Han-Zhong
A colloidal gold immunochromatographic strip was developed for rapid detection of Streptococcus agalactiae (S. agalactiae) infection in tilapia. The monoclonal antibodies (mAb) 4C12 and 3A9 were used to target S. agalactiae as colloidal gold-mAb conjugate and captured antibody, respectively. The colloidal gold immunochromatographic strip was assembled via routine procedures. Optimal pH and minimum antibody levels in the reaction system for gold colloidal-mAb 4C12 conjugation were pH 7.4 and 18μg/mL, respectively...
December 14, 2016: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/27991550/proteomic-analysis-reveals-that-metabolic-flows-affect-the-susceptibility-of-aeromonas-hydrophila-to-antibiotics
#17
Zujie Yao, Wanxin Li, Yi Lin, Qian Wu, Feifei Yu, Wenxiong Lin, Xiangmin Lin
The overuse of antibiotics results in the development of antibiotic resistance and limits the useful life of these drugs in fighting bacteria, including Aeromonas hydrophila, a well-known opportunistic pathogen that causes serious infections in fish and other animals. In this study, we investigated the adaptive resistance mechanism in A. hydrophila by multiple proteomic methods. Dimethyl labeling and label-free methods were performed to compare the differential expression of proteins in response to various doses of oxytetracycline (OXY)...
December 19, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27989861/identification-and-activity-of-a-paralog-of-cathepsin-s-from-yellow-catfish-pelteobagrus-fulvidraco-involved-in-immune-response
#18
Yun Wang, Xin Liu, Shuai Lv, Jinnan Ren, Fei Ke
Cathepsin S, a papain-like cysteine peptidase, is an important regulator and signaling molecule with diverse biological actions in addition to immune presentation. However, our understanding of its structure and properties remains limited. Herein, a full-length cathepsin Sa from yellow catfish was cloned and named PfCTSSa. It contained 1366 bp, including a 981 bp ORF flanked by a 123 bp 5'-untranslated region (UTR) and a 262 bp 3'-UTR. This ORF encoded a 36.5 kD cysteine protease with the deduced amino acid sequence having a 76% sequence identity with Ictalurus punctatus ctssa...
December 15, 2016: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/27988310/melaleuca-alternifolia-essential-oil-enhances-the-non-specific-immune-system-and-prevents-oxidative-damage-in-rhamdia-quelen-experimentally-infected-by-aeromonas-hydrophila-effects-on-cholinergic-and-purinergic-systems-in-liver-tissue
#19
Matheus D Baldissera, Carine F Souza, Guerino B Júnior, Agueda C de Vargas, Aline A Boligon, Marli M A de Campos, Lenita M Stefani, Bernardo Baldisserotto
The aim of this study was to evaluate the effects of M. alternifolia essential oil used to treat silver catfish (Rhamdia quelen) experimentally infected by Aeromonas hydrophila on oxidative stress variables, and for the first time, on hepatic enzymes of the cholinergic and adenosinergic systems. For that, fish were divided into six groups (A-F), each containing seven animals. Groups A, B and C were composed of uninfected animals, while animals in groups D, E and F were intramuscularly inoculated with A. hydrophila...
December 14, 2016: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/27986601/identification-and-characterization-of-c1-inhibitor-in-nile-tilapia-oreochromis-niloticus-in-response-to-pathogenic-bacteria
#20
Mingmei Ding, Meng Chen, Xiaofang Zhong, Yuhong Wang, Shengli Fu, Xiaoxue Yin, Zheng Guo, Jianmin Ye
C1 inhibitor (C1INH) is a multi-functional serine protease inhibitor in plasmatic cascades, not only inactivating various proteases, but also regulating both complement and contact system activation. In this study, we described the identification and characterization of a C1INH ortholog from Nile tilapia (Oreochromis niloticus) at molecular, protein and cellular levels. The full-length cDNA of Oreochromis niloticus C1INH (OnC1INH) consisted of 1791 bp of nucleotide sequence encoding polypeptides of 596 amino acids...
December 13, 2016: Fish & Shellfish Immunology
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