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Journal of Aquatic Animal Health

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https://www.readbyqxmd.com/read/28524816/phylogenetic-variation-of-chelonid-alphaherpesvirus-5-in-green-turtle-chelonia-mydas-populations-along-the-queensland-coast-australia
#1
E Ariel, F Nainu, K Jones, K Juntunen, I Bell, J Gaston, J Scott, S Trocini, G W Burgess
Sea turtle fibropapillomatosis (FP) is a disease marked by proliferation of benign but debilitating cutaneous and occasional visceral tumours, likely to be caused by chelonid alphaherpesvirus 5 (ChHV5). This study presents a phylogeny of ChHV5 strains on the east coast of Queensland, Australia and a validation for previously unused primers. Two different primer sets (gB-1534 and gB-813) were designed to target a region including part of the UL27 glycoprotein B (gB) gene and part of UL28 of ChHV5. Sequences obtained from FP tumours on juvenile green turtles (<65 cm CCL) had substantial homology with published ChHV5 sequences while a skin biopsy from a turtle without FP failed to react in the PCRs used in this study...
May 19, 2017: Journal of Aquatic Animal Health
https://www.readbyqxmd.com/read/28438079/potential-non-cutaneous-sites-of-chelonid-herpesvirus-5-persistence-and-shedding-in-green-sea-turtles-chelonia-mydas
#2
Annie Page-Karjian, Nicole L Gottdenker, Jordyn Whitfield, Lawrence Herbst, Terry M Norton, Branson Ritchie
Chelonid herpesvirus 5 (ChHV5), the likely etiologic agent of sea turtle fibropapillomatosis (FP), is predicted to be unevenly distributed within an infected turtle, with productive virus replication and virion shedding occurring in cutaneous tumor keratinocytes. In this study, we measured and compared ChHV5 DNA quantities in tumors, skin, urine, major organs, and nervous tissue samples. These samples were taken from the carcasses of 10 juvenile green turtles (Chelonia mydas) with and without clinical signs of FP that stranded in Florida, USA during 2014...
April 24, 2017: Journal of Aquatic Animal Health
https://www.readbyqxmd.com/read/28467192/antioxidant-responses-neurotoxicity-and-metallothionein-gene-expression-in-juvenile-korean-rockfish-sebastes-schlegelii-under-dietary-lead-exposure
#3
Jun-Hwan Kim, Chul Woong Oh, Ju-Chan Kang
This study was conducted to assess toxic effects of dietary lead (Pb) exposure on Korean Rockfish Sebastes schlegelii. Juvenile rockfish were used to evaluate the oxidative stress, neurotoxicity, and metallothionein (MT) gene expression after dietary exposure to lead (as Pb(2+); 0, 30, 60, 120 and 240 mg/kg). Superoxide dismutase (SOD) activity, a measure of oxidative stress, was substantially elevated in the livers and gills of fish given dietary Pb greater than 60 mg/kg. Glutathione S-transferase (GST) activity in the liver and gill was significantly increased by dietary Pb > 60 mg/kg...
June 2017: Journal of Aquatic Animal Health
https://www.readbyqxmd.com/read/28467176/a-recombinant-viral-hemorrhagic-septicemia-virus-genotype-ivb-glycoprotein-produced-in-cabbage-looper-larvae-trichoplusia-ni-elicits-antibody-response-and-protection-in-muskellunge
#4
Isaac Standish, Mohamed Faisal
The Novirhabdovirus viral hemorrhagic septicemia virus (VHSV) genotype IVb has caused serious fish kills and become endemic throughout the Great Lakes basin of North America. This is troublesome since there are no protective vaccines currently approved against this deadly disease even though recombinant technology has become increasingly common. Herein, we explored the production of a recombinant VHSV-IVb glycoprotein, believed to be important for virus infectivity, and determined its ability to elicit protection against challenge with the wild virus strain...
June 2017: Journal of Aquatic Animal Health
https://www.readbyqxmd.com/read/28406736/biofilm-formation-on-aquaculture-substrates-by-selected-bacterial-fish-pathogens
#5
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/28379065/inhibition-of-grass-carp-reovirus-infection-by-dna-aptamers-against-s10-protein
#6
Hongru Liang, Xiaozhe Fu, Lihui Liu, Qiang Lin, Huizhi Guo, Yonggang Li, JiaXu Liu, Zhibin Huang, Ningqiu Li
Grass Carp reovirus (GCRV) is one of the most pathogenic agents among aquareovirus isolates and has the ability to cause a severe epidemic outbreak of hemorrhagic disease, thus resulting in both a high mortality rate during the culture of Grass Carp Ctenopharyngodon idella and an enormous economic loss. Aptamers have been demonstrated to have strong promising applications in antiviral drug development. In the present study, a complementary DNA fragment encoding the S10 gene of GCRV was cloned. The S10 protein was expressed and purified...
June 2017: Journal of Aquatic Animal Health
https://www.readbyqxmd.com/read/28376313/validation-of-fermentation-and-processing-procedures-for-the-commercial-scale-production-of-a-live-attenuated-edwardsiella-ictaluri-vaccine-for-use-in-channel-catfish-aquaculture
#7
Terrence E Greenway, Todd S Byars, Robert B Elliot, Xixuan Jin, Matt J Griffin, David J Wise
Mortality associated with Edwardsiella ictaluri infection is a serious impediment to the commercial production of fingerling Channel Catfish Ictalurus punctatus. A patented, live, attenuated, orally delivered vaccine has been developed that offers exceptional protection against E. ictaluri infection in both laboratory and small-scale pond trials. Further vaccine development is contingent on the successful completion of large-scale field trials that accurately reflect industry conditions. This current work focuses on the validation of fermentation protocols and the optimization of downstream processing procedures to produce sufficient quantities of vaccine to conduct commercial-scale field trials...
June 2017: Journal of Aquatic Animal Health
https://www.readbyqxmd.com/read/28375717/optimization-of-a-plaque-neutralization-test-pnt-to-identify-the-exposure-history-of-pacific-herring-to-viral-hemorrhagic-septicemia-virus-vhsv
#8
Lucas M Hart, Ashley MacKenzie, Maureen K Purcell, Rachel L Powers, Paul K Hershberger
Methods for a plaque neutralization test (PNT) were optimized for the detection and quantification of viral hemorrhagic septicemia virus (VHSV) neutralizing activity in the plasma of Pacific Herring Clupea pallasii. The PNT was complement dependent, as neutralizing activity was attenuated by heat inactivation; further, neutralizing activity was mostly restored by the addition of exogenous complement from specific-pathogen-free Pacific Herring. Optimal methods included the overnight incubation of VHSV aliquots in serial dilutions (starting at 1:16) of whole test plasma containing endogenous complement...
June 2017: Journal of Aquatic Animal Health
https://www.readbyqxmd.com/read/28324676/comparison-of-selected-nonlethal-samples-from-adult-steelhead-for-detection-of-infectious-hematopoietic-necrosis-virus-using-cell-culture
#9
David R Burbank, Tyson R Fehringer, Luciano V Chiaramonte
Nonlethal sampling techniques have previously been evaluated for detection of a variety of viral salmonid pathogens. However, many of these studies have used molecular assays in lieu of widely accepted cell culture techniques to evaluate the sampled tissues. Samples were collected from female steelhead Oncorhynchus mykiss broodstock using three potential nonlethal sampling methods (mucus/skin scrape, pectoral fin clip, and gill tissue biopsy) and evaluated for the presence of infectious hematopoietic necrosis virus (IHNV) via cell culture techniques...
June 2017: Journal of Aquatic Animal Health
https://www.readbyqxmd.com/read/28248610/journal-of-aquatic-animal-health
#10
(no author information available yet)
No abstract text is available yet for this article.
March 2017: Journal of Aquatic Animal Health
https://www.readbyqxmd.com/read/28225652/dna-vaccination-partially-protects-muskellunge-against-viral-hemorrhagic-septicemia-virus-vhsv-ivb
#11
Elena V Millard, Ashley M Bourke, Scott E LaPatra, Travis O Brenden, Scott D Fitzgerald, Mohamed Faisal
A DNA vaccine containing the glycoprotein (G) gene of the North American viral hemorrhagic septicemia virus (VHSV) genotype IVb was developed to evaluate the immune response of fish following vaccination and evaluate its efficacy in protecting a susceptible species, the Muskellunge Esox masquinongy, against VHSV-IVb challenge. Seven weeks (539 degree-days) following vaccination with 10 μg of either pVHSivb-G or a control plasmid, Muskellunge were challenged by immersion with 10(5) plaque-forming units (pfu)/mL of VHSV-IVb...
March 2017: Journal of Aquatic Animal Health
https://www.readbyqxmd.com/read/28225636/in-memoriam-william-toshio-yasutake-1922-2016
#12
Diane Elliott, Jim Winton
No abstract text is available yet for this article.
March 2017: Journal of Aquatic Animal Health
https://www.readbyqxmd.com/read/28166479/effects-of-t-2-toxin-on-pacific-white-shrimp-litopenaeus-vannamei-growth-and-antioxidant-defenses-and-capacity-and-histopathology-in-the-hepatopancreas
#13
Yijia Deng, Yaling Wang, Xiaodi Zhang, Lijun Sun, Chaojin Wu, Qi Shi, Rundong Wang, Xiaodong Sun, Siyuan Bi, Ravi Gooneratne
Modified-masked T-2 toxin (mT-2) formed during metabolism in edible aquatic animals may go undetected by traditional analytical methods, thereby underestimating T-2 toxicity. The effects of T-2 on growth and antioxidant capacity and histopathological changes in the hepatopancreas were studied in Pacific white shrimp Litopenaeus vannamei exposed for 20 d to 0, 0.5, 1.2, 2.4, 4.8, and 12.2 mg/kg of T-2 in their feed. The concentration of mT-2 in the hepatopancreas was detected by liquid chromatography-tandem mass spectrophotometry before and after trifluoroacetic acid (TFA) treatment that converted mT-2 to free T-2...
March 2017: Journal of Aquatic Animal Health
https://www.readbyqxmd.com/read/28166465/isolation-and-characterization-of-large-marine-bacteriophage-myoviridae-vhkm4-infecting-vibrio-harveyi
#14
Tamrin M Lal, Motohiko Sano, Julian Ransangan
The causative agent responsible for vibriosis in tropical fish aquaculture, Vibrio harveyi, has become a major bacterial pathogen. Studies suggest that this bacterium has developed resistance to antibiotics commonly used in aquaculture. In view of this situation and the requirement for the proposed postantibiotic era, bacteriophage therapy seems to be a promising control strategy for fish vibriosis. In this study, a lytic Vibrio phage VhKM4 belonging to a member of large, marine Myoviridae was successfully isolated...
March 2017: Journal of Aquatic Animal Health
https://www.readbyqxmd.com/read/28166463/saprolegniosis-in-nile-tilapia-identification-molecular-characterization-and-phylogenetic-analysis-of-two-novel-pathogenic-saprolegnia-strains
#15
Eman Zahran, Elsayed E Hafez, Ferdaus Mohd Altaf Hossain, Mohamed Elhadidy, Adel A Shaheen
Saprolegniosis is a fungal infection that leads to huge economic losses in tilapia aquaculture. Saprolegnia spp. are usually implicated as the etiological agents, but their identification is sometimes troublesome and confusing. In this study, two Saprolegnia strains (ManS22 and ManS33) were isolated from Nile Tilapia Oreochromis niloticus suffering from saprolegniosis. Both isolates were characterized morphologically and from internal transcribed spacer (ITS) sequence data. Additionally, both strains were tested for pathogenicity, and they were highly pathogenic and caused cumulative mortalities of 88...
March 2017: Journal of Aquatic Animal Health
https://www.readbyqxmd.com/read/28166454/potential-reservoirs-and-risk-factors-for-vhsv-ivb-in-an-enzootic-system-budd-lake-michigan
#16
Elizabeth Throckmorton, Travis Brenden, Amber K Peters, Tammy J Newcomb, Gary E Whelan, Mohamed Faisal
Viral hemorrhagic septicemia virus genotype IVb (VHSV IVb) has caused major, sporadic fish die-offs in the Laurentian Great Lakes region of North America since 2005. Presently, factors affecting VHSV IVb persistence in enzootic systems are not well understood. Even with annual surveillance, the virus can go undetected for several years after an outbreak before again re-emerging, which suggests that the virus is maintained in the system either below detectable levels or in untested reservoirs. The aim of this study was to identify potential reservoirs of VHSV IVb in Budd Lake, Michigan; VHSV IVb was first detected in Budd Lake in 2007 but remained undetected until 2011...
March 2017: Journal of Aquatic Animal Health
https://www.readbyqxmd.com/read/28166451/serology-in-finfish-for-diagnosis-surveillance-and-research-a-systematic-review
#17
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/28005490/survival-rates-of-out-migrating-yearling-chinook-salmon-in-the-lower-columbia-river-and-plume-after-exposure-to-gas-supersaturated-water
#18
Ian G Brosnan, David W Welch, Melinda Jacobs Scott
In 2011, unusually high flows caused total dissolved gas (TDG) levels in the Columbia River, USA, to escalate well above the 120% regulatory limit that was imposed to prevent harmful impacts to aquatic organisms. After observing gas bubble trauma (GBT) in dead yearling Chinook Salmon Oncorhynchus tshawytscha (smolts) held in tanks, we compared estimated survival rates of acoustic-tagged in-river-migrating (IR) and transported (TR) smolts that were released below Bonneville Dam prior to and during the period of elevated TDG (>120%)...
December 2016: Journal of Aquatic Animal Health
https://www.readbyqxmd.com/read/27791693/assessment-of-detoxifying-markers-for-florfenicol-in-rainbow-trout-liver
#19
Antonia Concetta Elia, Nicole Pacini, Maria Letizia Fioravanti, Ambrosius Josef Martin Dörr, Annalisa Zaccaroni, Alba Maria Parmeggiani, Andrea Gustinelli, Oliviero Mordenti, Maria Cesarina Abete, Marino Prearo
Florfenicol (FF) is employed in fish farms to contest or prevent bacterial infections. However, this pharmaceutical may produce reactive oxygen species that may cause biochemical changes in antibiotic-treated fish. The aim of this study was to evaluate the effect of FF on Rainbow Trout Oncorhynchus mykiss treated for 10 d with 7.5 and 15 mg/kg FF followed by a withdrawal period of 5 d. Superoxide dismutase, catalase, glutathione peroxidase, glutathione reductase, glutathione S-transferase, glyoxalase I and glyoxalase II, total glutathione, lactic dehydrogenase, and alkaline phosphatase were investigated in the livers of treated and untreated fish...
December 2016: Journal of Aquatic Animal Health
https://www.readbyqxmd.com/read/27786797/first-record-of-fibropapillomatosis-in-a-green-turtle-chelonia-mydas-from-the-baja-california-peninsula
#20
Eduardo Reséndiz, Sergio Flores-Ramírez, Volker Koch, Amaury Cordero-Tapia
Fibropapillomatosis (FP) is characterized by multiple fibroepithelial tumors in all parts of the skin and has been reported in sea turtles worldwide. Clinically infected individuals are often emaciated and anemic. In Mexico, however, there are few records of this disease. In this study of green turtles Chelonia mydas in Laguna San Ignacio in Baja California Sur (BCS), we noted one juvenile with multifocal fibropapilloma lesions on the external upper surface of its eyes and hind flippers. Light microscopy revealed hyperkeratosis, epidermal hyperplasia, dermal papillary projections, and fibroblast proliferation...
December 2016: Journal of Aquatic Animal Health
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