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Aeromonas hydrophila

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https://www.readbyqxmd.com/read/28535971/comparative-analysis-of-two-ferritin-subunits-from-blunt-snout-bream-megalobrama-amblycephala-characterization-expression-iron-depriving-and-bacteriostatic-activity
#1
Zhujin Ding, Xiaoheng Zhao, Qifeng Zhan, Lei Cui, Qianhui Sun, Weimin Wang, Hong Liu
Iron is an essential microelement for almost all living organisms, while an excess of iron is toxic, thus maintenance of iron homeostasis is vital. As iron storage protein, ferritin plays an important role in iron metabolism. In the present study, we cloned and characterized the ferritin H subunit from Megalobrama amblycephala, termed as MamFerH. An iron-responsive element (IRE) was predicted in the 5' untranslated region (UTR) of MamFerH, while its bulge structural was different from that of the reported ferritin M subunit (MamFerM)...
May 20, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28532667/evaluation-of-three-recombinant-outer-membrane-proteins-ompa1-tdr-and-tbpa-as-potential-vaccine-antigens-against-virulent-aeromonas-hydrophila-infection-in-channel-catfish-ictalurus-punctatus
#2
Hossam Abdelhamed, Iman Ibrahim, Seong Won Nho, Michelle M Banes, Robert W Wills, Attila Karsi, Mark L Lawrence
A virulent clonal population of Aeromonas hydrophila (VAh) is recognized as the etiological agent in outbreaks of motile aeromonas septicemia (MAS) in catfish aquaculture in the southeastern United States since 2009. Genomic subtraction revealed three outer membrane proteins present in VAh strain ML09-119 but not in low virulence reference A. hydrophila strains: major outer membrane protein OmpA1, TonB-dependent receptor (Tdr), and transferrin-binding protein A (TbpA). Here, the genes encoding ompA1, tdr, and tbpA were cloned from A...
May 19, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28526442/comparative-study-of-interleukin-17c-il-17c-and-il-17d-in-large-yellow-croaker-larimichthys-crocea-reveals-their-similar-but-differential-functional-activity
#3
Yang Ding, Jingqun Ao, Xinhua Chen
Interleukin 17 (IL-17) family members are key players in regulating the immune response in mammals. Here, we identified the IL-17C and IL-17D homologs from large yellow croaker (Larimichthys crocea), named LcIL-17C and LcIL-17D, respectively. The deduced LcIL-17C and LcIL-17D proteins possessed the typical IL-17 domain and shared a conserved arrangement of eight cysteine residues. Both LcIL-17C and LcIL-17Dc genes were constitutively expressed in all tissues examined, although at different levels. After challenge with Aeromonas hydrophila, the expression of LcIL-17C and LcIL-17D was significantly increased in gills, head kidney, and spleen...
May 16, 2017: Developmental and Comparative Immunology
https://www.readbyqxmd.com/read/28499967/molecular-cloning-expression-and-antioxidative-activity-of-2-cys-peroxiredoxin-from-freshwater-mussel-cristaria-plicata
#4
Xiaobo Wang, Baoqing Hu, Chungen Wen, Ming Zhang, Shaoqing Jian, Gang Yang
Peroxiredoxins (Prxs) play an important role against various oxidative stresses by catalyzing the reduction of hydrogen peroxide (H2O2) and organic hydroperoxides to less harmful form. A 2-cys peroxiredoxin, designated as CpPrx, was cloned from hemocytes of freshwater mussel Cristaria plicata. The full length cDNA of CpPrx is 1247 bp, which includes an open reading frame (ORF) of 591bp, encoding 196 amino acids. CpPrx possesses two conserved cysteine residues (Cys49, Cys170). The deduced amino acid sequence of CpPrx showed a high level (67-74%) of sequence similarity to 2-Cys Prxs from other species...
May 9, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28490945/sanitary-impact-evaluation-of-drinking-water-in-storage-reservoirs-in-moroccan-rural-area
#5
Faissal Aziz, Juan Parrado Rubio, Naaila Ouazzani, Mohammed Dary, Hamid Manyani, Bruno Rodríguez Morgado, Laila Mandi
In Morocco, storage reservoirs are particular systems of water supply in rural areas. These reservoirs are fed with rainwater and/or directly from the river, which are very contaminated by several pathogenic bacteria. They are used without any treatment as a drinking water by the surrounding population. In this context, the aim of this study is to evaluate the impact of consuming contaminated water stored in reservoirs on health status for six rural communities located in Assif El Mal, Southern East of Marrakech...
May 2017: Saudi Journal of Biological Sciences
https://www.readbyqxmd.com/read/28484444/leaf-extracts-of-mangifera-indica-l-inhibit-quorum-sensing-regulated-production-of-virulence-factors-and-biofilm-in-test-bacteria
#6
Fohad M Husain, Iqbal Ahmad, Abdullah S Al-Thubiani, Hussein H Abulreesh, Ibrahim M AlHazza, Farrukh Aqil
Quorum sensing (QS) is a global gene regulatory mechanism in bacteria for various traits including virulence factors. Disabling QS system with anti-infective agent is considered as a potential strategy to prevent bacterial infection. Mangifera indica L. (mango) has been shown to possess various biological activities including anti-QS. This study investigates the efficacy of leaf extracts on QS-regulated virulence factors and biofilm formation in Gram negative pathogens. Mango leaf (ML) extract was tested for QS inhibition and QS-regulated virulence factors using various indicator strains...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28484272/effect-of-bacillus-subtilis-on-aeromonas-hydrophila-induced-intestinal-mucosal-barrier-function-damage-and-inflammation-in-grass-carp-ctenopharyngodon-idella
#7
Weiguang Kong, Can Huang, Ying Tang, Ding Zhang, Zhixin Wu, Xiaoxuan Chen
Our study explored the effect of oral intubation of Bacillus subtilis on Aeromonas hydrophila-induced intestinal mucosal barrier function damage and inflammation in grass carp. The mid-intestine mucosal tissue was collected for ATPase activity measurement. Intestinal mucosa was also ultrastructurally examined with transmission electron microscope (TEM), and its permeability was determined using Evans blue (EB) and D-lactic acid. The mid-intestine pro-inflammation cytokine, MyD88 and tight junction (TJ) protein mRNA expression levels were measured using real-time quantitative PCR...
May 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28484157/hematopoietic-neoplasms-accompanied-by-severe-enterocolitis-due-to-aeromonas-species
#8
Yuka Miyamoto, Kengo Udaka, Etsuko Sekimoto, Hironobu Shibata, Kanako Otsuka, Keiko Mori, Toshio Shigekiyo, Shuji Ozaki
Aeromonas species are known to be a cause of diarrhea and acute enterocolitis. However, only a few cases have been reported and the pathophysiology of Aeromonas infection has not as yet been clarified. We experienced 2 cases developing severe enterocolitis during the course of hematological malignancies, specifically multiple myeloma and diffuse large B-cell lymphoma. Both patients presented with watery diarrhea that persisted for more than a week, followed by bloody diarrhea. Total colon endoscopy showed multiple ulcers on the mucosa from the sigmoid colon to the rectum, and biopsies from the ulcer revealed infiltration of neutrophils and eosinophils in the mucosa and submucosa...
2017: [Rinshō Ketsueki] the Japanese Journal of Clinical Hematology
https://www.readbyqxmd.com/read/28482758/lesions-caused-by-virulent-aeromonas-hydrophila-in-farmed-catfish-ictalurus-punctatus-and-i-punctatus-%C3%A3-i-furcatus-in-mississippi
#9
Wes A Baumgartner, Lorelei Ford, Larry Hanson
In 2009, a virulent strain of Aeromonas hydrophila caused severe disease and high mortalities (motile aeromonad septicemia variant [MASv]) in farmed channel catfish ( Ictalurus punctatus) and hybrid catfish ( I. punctatus × I. furcatus) in eastern Mississippi and Alabama. As is common in MAS, there is severe hemorrhagic dermatitis with ulceration, as well as abdominal hyperemia, petechiation, and mild ascites. Additional findings in MASv cases include panophthalmitis and orbital cellulitis, leading to ocular rupture, and brains are often hyperemic with mild random acute hemorrhage...
May 1, 2017: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/28479400/mannan-binding-lectin-associated-serine-protease-1-masp-1-mediates-immune-responses-against-aeromonas-hydrophila-in%C3%A2-vitro-and-in%C3%A2-vivo-in-grass-carp
#10
Yun-Fei Dang, Yu-Bang Shen, Xiao-Yan Xu, Shen-Tong Wang, Xin-Zhan Meng, Li-Sen Li, Meng Zhang, Mo-Yan Hu, Li-Qun Lv, Rong-Quan Wang, Jia-Le Li
The mannan-binding lectin-associated serine protease-1 (MASP-1) gene is a crucial component of the lectin pathway in the complement and coagulation cascade. Although MASP-1 has been found in the immune system of teleosts, its immune functions in response to bacterial infection are unclear. In this study, we identified a MASP-1 homolog (gcMASP-1) in the grass carp (Ctenopharyngodon idella). The full-length 3308-bp gcMASP-1 cDNA includes a 2160-bp open reading frame encoding a protein composed of 719 amino acids with epidermal growth factor-like, complement control protein, and trypsin-like domains...
May 4, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28476666/label-free-proteomic-analysis-of-intestinal-mucosa-proteins-in-common-carp-cyprinus-carpio-infected-with-aeromonas-hydrophila
#11
Guilan Di, Hui Li, Chao Zhang, Yanjing Zhao, Chuanjiang Zhou, Sajid Naeem, Li Li, Xianghui Kong
Outbreaks of infectious diseases in common carp Cyprinus carpio, a major cultured fish in northern regions of China, constantly result in significant economic losses. Until now, information proteomic on immune defence remains limited. In the present study, a profile of intestinal mucosa immune response in Cyprinus carpio was investigated after 0, 12, 36 and 84 h after challenging tissues with Aeromonas hydrophila at a concentration of 1.4 × 10(8) CFU/mL. Proteomic profiles in different samples were compared using label-free quantitative proteomic approach...
May 3, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28458058/sanitary-evaluation-of-domestic-water-supply-facilities-with-storage-tanks-and-detection-of-aeromonas-enteric-and-related-bacteria-in-domestic-water-facilities-in-okinawa-prefecture-of-japan
#12
Kazufumi Miyagi, Kouichi Sano, Itaru Hirai
To provide for temporary restrictions of the public water supply system, storage tanks are commonly installed in the domestic water systems of houses and apartment buildings in Okinawa Prefecture of Japan. To learn more about the sanitary condition and management of these water supply facilities with storage tanks (hereafter called "storage tank water systems") and the extent of bacterial contamination of water from these facilities, we investigated their usage and the existence of Aeromonas, enteric and related bacteria...
April 5, 2017: Water Research
https://www.readbyqxmd.com/read/28442417/cloning-expression-analysis-and-antibacterial-propertiesof-three-serum-amyloid-a-in-common-carp-cyprinus-carpio
#13
Juhua Yu, Yongkai Tang, Jianlin Li, Hongxia Li, Fan Yu, Wenjuan Yu, Feng He, Chunjie Fu, Shuntao Mao
Three serum amyloid A (SAA) genes were identified from the common carp (Cyprinus carpio) by PCR and RT-PCR. Considering both direction and sequence similarity with mammal's orthologs, they were named CcSAA3a, CcSAA3b and CcSAA1. CcSAA3b and CcSAA1 are adjacent on contig LHQP01017858, suggesting that the prototype of or the simplest SAA multigene family have occurred in common carp. A phylogenetic analysis of the SAAs indicated that the fish SAAs were closer to those of invertebrates and Ornithorhynchus anatinus, a primitive mammal, than to mammalian SAAs...
April 23, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28436829/modelling-the-effect-of-combined-antimicrobials-a-base-model-for-multiple-hurdles
#14
M Anastasiadi, R J W Lambert
Combining antimicrobials to reduce microbial growth and to combat the potential impact of antimicrobial resistance is an important subject both in foods and in pharmaceutics. Modelling of combined treatments designed to reduce or eliminate microbial contamination in foods (microbiological predictive modelling) has become commonplace. Two main reference models are used to analyse mixtures: the Bliss Independence and the Loewe reference models (LRM). By using optical density to analyse the growth of Aeromonas hydrophila, Cronobacter sakazakii and Escherichia coli in combined NaCl/NaCl (a mock combination experiment) and combined NaCl/KCl experiments, previous models for combined antimicrobials in foods, based on the Bliss approach, were shown to be inconsistent and that models based on the LRM more applicable...
April 14, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/28433715/aloe-vera-enhances-the-innate-immune-response-of-pacu-piaractus-mesopotamicus-after-transport-stress-and-combined-heat-killed-aeromonas-hydrophila-infection
#15
Fábio S Zanuzzo, Rafael E Sabioni, Luz Natalia F Montoya, Gisele Favero, Elisabeth C Urbinati
In this study, pacu (Piaractus mesopotamicus) were fed with diets containing Aloe vera for 10 days prior to transport stress and infection with heat killed Aeromonas hydrophila. A. vera is popular around the world due to its medicinal properties, including immunostimulatory effects which was observed in this study. The results show that transport causes immunosuppression, an effect that was prevented by A. vera. Specifically, A. vera prevented reductions of both leukocyte respiratory burst and hemolytic activity of complement system caused by transport...
April 19, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28428059/the-decreased-growth-performance-and-impaired-immune-function-and-structural-integrity-by-dietary-iron-deficiency-or-excess-are-associated-with-tor-nf-%C3%AE%C2%BAb-p38mapk-nrf2-and-mlck-signaling-in-head-kidney-spleen-and-skin-of-grass-carp-ctenopharyngodon-idella
#16
Yan-Lin Guo, Wei-Dan Jiang, Pei Wu, Yang Liu, Xiao-Qiu Zhou, Sheng-Yao Kuang, Ling Tang, Wu-Neng Tang, Yong-An Zhang, Lin Feng
This study was conducted to investigate the effects of dietary iron on the growth, and immune function and structural integrity in head kidney, spleen and skin as well as the underlying signaling of young grass carp (Ctenopharyngodon idella). Total 630 grass carp (242.32 ± 0.58 g) were fed diets containing graded levels of iron at 12.15 (basal diet), 35.38, 63.47, 86.43, 111.09, 136.37 mg/kg (diets 2-6 were added with ferrous fumarate) and 73.50 mg/kg (diet 7 was added with ferrous sulfate) diet for 60 days...
April 18, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28425012/a-study-of-the-damage-of-the-intestinal-mucosa-barrier-structure-and-function-of-ctenopharyngodon-idella-with-aeromonas-hydrophila
#17
Wei-Guang Kong, Si-Si Li, Xiao-Xuan Chen, Yu-Qing Huang, Ying Tang, Zhi-Xin Wu
The aim of this study is to explore the effect of Aeromonas hydrophila on the intestinal mucosal barrier structure and intestinal permeability in grass carp (Ctenopharyngodon idella). Histopathological examinations showed that A. hydrophila induced severe intestinal lesions, including inflammatory cell infiltration and intestinal villus fusion and swelling. Messenger RNA (mRNA) expression of the inflammatory cytokines TNF-α, IL-1β, IL-8, IL-10 and MyD88 was significantly increased after infection with A. hydrophila...
April 19, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/28423080/s-and-r-linalool-a-comparison-of-the-in-vitro-anti-aeromonas-hydrophila-activity-and-anesthetic-properties-in-fish
#18
Lenise L Silva, Luana S Balconi, Letícia T Gressler, Quelen I Garlet, Fernando J Sutili, Agueda P C Vargas, Bernardo Baldisserotto, Ademir F Morel, Berta M Heinzmann
Linalool is the main compound of many essential oils and occurs in two isomeric forms: S-(+)- and R-(-)-linalool. This study aimed to determine if linalool isomers have different antimicrobial and anesthetic properties in fish. For this purpose, these compounds were previously isolated from Lippia alba (Mill.)N. E. Brown and Ocimum americanum L. essential oils. Antimicrobial effects were evaluated through the microdilution test against Aeromonas hydrophila, an important fish disease etiologic agent. Induction time until sedation, anesthesia and recovery time were determined in silver catfish (Rhamdia quelen) through bath exposure (60, 180, 300 or 500 μL L-1)...
January 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/28406736/biofilm-formation-on-aquaculture-substrates-by-selected-bacterial-fish-pathogens
#19
Wenlong Cai, Covadonga R Arias
The objective of this study was to determine whether common bacterial catfish pathogens could attach and colonize surfaces commonly found in aquaculture facilities. In addition, we evaluated the role of calcium in biofilm formation. Attachment to polystyrene plates was used to quantify biofilm formation by five bacterial pathogens (i.e., Flavobacterium columnare, Aeromonas hydrophila, Edwardsiella ictaluri, E. tarda, and E. piscicida). Flavobacterium columnare and A. hydrophila formed thick biofilms that were enhanced by calcium supplementation...
June 2017: Journal of Aquatic Animal Health
https://www.readbyqxmd.com/read/28400765/role-of-bacillus-licheniformis-vs16-derived-biosurfactant-in-mediating-immune-responses-in-carp-rohu-and-its-application-to-the-food-industry
#20
Sib Sankar Giri, Shib Sankar Sen, Jin Woo Jun, V Sukumaran, Se Chang Park
Multifarious applications of Bacillus licheniformis VS16-derived biosurfactant were explored. Labeo rohita fingerlings were injected intraperitoneally with 0.1 mL of phosphate-buffered saline (PBS) containing purified biosurfactant at 0 (control), 55 (S55), 110 (S110), 220 (S220), or 330 (S330) μg mL(-1) concentrations. Various immunological parameters and the expression of immune-related genes were measured at 7, 14, and 21 days post-administration (dpa). At 21 dpa, fish were challenged with Aeromonas hydrophila and mortality was recorded for 14 days...
2017: Frontiers in Microbiology
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