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Journal of Fish Diseases

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https://www.readbyqxmd.com/read/28429861/extreme-ocean-acidification-reduces-the-susceptibility-of-eastern-oyster-shells-to-a-polydorid-parasite
#1
J C Clements, D Bourque, J McLaughlin, M Stephenson, L A Comeau
Ocean acidification poses a threat to marine organisms. While the physiological and behavioural effects of ocean acidification have received much attention, the effects of acidification on the susceptibility of farmed shellfish to parasitic infections are poorly understood. Here we describe the effects of moderate (pH 7.5) and extreme (pH 7.0) ocean acidification on the susceptibility of Crassostrea virginica shells to infection by a parasitic polydorid, Polydora websteri. Under laboratory conditions, shells were exposed to three pH treatments (7...
April 21, 2017: Journal of Fish Diseases
https://www.readbyqxmd.com/read/28429853/molecular-cloning-of-mda5-phylogenetic-analysis-of-rig-i-like-receptors-rlrs-and-differential-gene-expression-of-rlrs-interferons-and-proinflammatory-cytokines-after-in%C3%A2-vitro-challenge-with-ipnv-isav-and-sav-in-the-salmonid-cell-line-to
#2
I-K G Nerbøvik, M A Solheim, H Ø Eggestøl, A Rønneseth, R A Jakobsen, H I Wergeland, G T Haugland
The RIG-I receptors RIG-I, MDA5 and LGP2 are involved in viral recognition, and they have different ligand specificity and recognize different viruses. Activation of RIG-I-like receptors (RLRs) leads to production of cytokines essential for antiviral immunity. In fish, most research has focused on interferons, and less is known about the production of proinflammatory cytokines during viral infections. In this study, we have cloned the full-length MDA5 sequence in Atlantic salmon, and compared it with RIG-I and LGP2...
April 21, 2017: Journal of Fish Diseases
https://www.readbyqxmd.com/read/28429823/changes-in-the-gut-microbiome-of-the-chinese-mitten-crab-eriocheir-sinensis-in-response-to-white-spot-syndrome-virus-wssv-infection
#3
Z F Ding, M J Cao, X S Zhu, G H Xu, R L Wang
Intestinal microorganisms play important roles in maintaining host health, but their functions in aquatic animal hosts have yet to be fully elucidated. The Chinese mitten crab, Eriocheir sinensis, is one such example. We attempted to identify the shift of gut microbiota that occurred in response to infection of white spot syndrome virus (WSSV), an emerging viral pathogen in the crab aquaculture industry. The microbiota may exert some control over aspects of the viral pathogenesis. We investigated the changes in composition and structure of the crab gut microbiome during various WSSV infection stages of 6 h post-infection (hpi) and 48 hpi, using a 16S rRNA approach on the MiSeq Illumina sequencing platform...
April 21, 2017: Journal of Fish Diseases
https://www.readbyqxmd.com/read/28429822/what-goes-around-comes-around-an-investigation-of-resistance-to-proliferative-kidney-disease-in-rainbow-trout-oncorhynchus-mykiss-walbaum-following-experimental-re-exposure
#4
C Bailey, H Segner, T Wahli
Rainbow trout Oncorhynchus mykiss surviving proliferative kidney disease (PKD) are reported not to develop the disease upon re-exposure. However, the mechanisms involved in the immune response to re-exposure are unknown. We examined disease susceptibility and the immune response of naive 1+ rainbow trout when first exposed to Tetracapsuloides bryosalmonae in comparison with that of 1+ rainbow trout re-exposed to T. bryosalmonae. PKD pathogenesis, parasite burden and transcriptional signatures of the host immune response were assessed at 10, 25 and 40 d...
April 21, 2017: Journal of Fish Diseases
https://www.readbyqxmd.com/read/28429818/piscirickettsia-salmonis-infection-in-cultured-lumpfish-cyclopterus-lumpus-l
#5
M Marcos-López, N M Ruane, F Scholz, M Bolton-Warberg, S O Mitchell, S Murphy O'Sullivan, A Irwin Moore, H D Rodger
A Piscirickettsia salmonis infection was diagnosed in lumpfish (Cyclopterus lumpus L.) juveniles held in a marine research facility on the west coast of Ireland. The main clinical signs and pathology included marked ascites, severe multifocal liver necrosis and severe diffuse inflammation and necrosis of the exocrine pancreas and peri-pancreatic adipose tissue. Numerous Piscirickettsia-like organisms were observed by histopathology in the affected organs, and the bacterial species was characterized by molecular analysis...
April 21, 2017: Journal of Fish Diseases
https://www.readbyqxmd.com/read/28422305/new-host-record-and-molecular-characterization-of%C3%A2-dicauda-atherinoidi-hoffman-walker-bivalvulida-myxobolidae-a-parasite-of-the-emerald-shiner-notropis-atherinoides-rafinesque-1818-and-mimic%C3%A2-shiner-notropis-vollucellus-cope-1865
#6
T P Loch, T G Rosser, W A Baumgartner, T Boontai, M Faisal, M J Griffin
Updated morphological and histopathological descriptions for Dicauda atherinoidi (Bivalvulida:Myxobolidae) and an expanded host range are supplemented with the first molecular data and phylogenetic analyses of the genus. Plasmodia were located on the head, ventrum/body and fins of infected emerald shiner Notropis atherinoides Rafinesque, 1818 and mimic shiner Notropis vollucellus Cope, 1865, a new host species. Myxospores were spherical, ranging 9.3-11.4 μm (10.5 ± 0.4) in length, 9.0-11.0 μm (9.7 ± 0...
April 19, 2017: Journal of Fish Diseases
https://www.readbyqxmd.com/read/28422304/antibiotic-treatment-of-zebrafish-mycobacteriosis-tolerance-and-efficacy-of-treatments-with-tigecycline-and-clarithromycin
#7
C T Chang, K M Doerr, C M Whipps
Zebrafish (Danio rerio) are a popular model organism used in a growing number of research fields. Maintaining healthy, disease-free laboratory fish is important for the integrity of many of these studies. Mycobacteriosis is a chronic bacterial infection caused by several Mycobacterium spp. and is the second most common disease found in laboratory zebrafish. Current mycobacteriosis control measures recommend the removal of infected fish and in severe outbreaks, depopulation. These measures can be effective, but less disruptive measures should be assessed for controlling mycobacteriosis, particularly when valuable and rare lines of fish are affected...
April 19, 2017: Journal of Fish Diseases
https://www.readbyqxmd.com/read/28422302/recombinant-pira-like-toxin-protects-shrimp-against-challenge-with-vibrio-parahaemolyticus-the-aetiological-agent-of-acute-hepatopancreatic-necrosis-disease
#8
A I Campa-Córdova, A F León-Gallo, A Romero-Maldonado, A C Ibarra-Serrano, S Rosales-Mendoza, I Hirono, C Angulo
No abstract text is available yet for this article.
April 19, 2017: Journal of Fish Diseases
https://www.readbyqxmd.com/read/28422295/in-vivo-and-in%C3%A2-vitro-studies-using-larval-and-adult-antigens-from-neobenedenia-melleni-on-immune-response-in-yellowtail-seriola-lalandi
#9
M Reyes-Becerril, E Alamillo, A Trasviña, I Hirono, H Kondo, W Jirapongpairoj, F Ascencio-Valle, C Angulo
Neobenedenia melleni is a monogenean parasite that causes significant mortality and economic losses in fish aquaculture. Changes in the antigenic composition of this parasite occur during its developmental stages. In this study, we evaluated humoral parameters in serum and transcriptional immune responses of yellowtail naturally infected with N. melleni. In addition, in vitro assays were performed to study the stimulatory effects of antigens from larvae and adults on spleen leucocytes from non-infected fish at 6 and 24 h post-stimulation...
April 19, 2017: Journal of Fish Diseases
https://www.readbyqxmd.com/read/28422294/antiviral-activity-of-exopolysaccharides-from-arthrospira-platensis-against-koi-herpesvirus
#10
M Reichert, S M Bergmann, J Hwang, R Buchholz, C Lindenberger
Although koi herpesvirus (KHV) has a history of causing severe economic losses in common carp and koi farms, there are still no treatments available on the market. Thus, the aim of this study was to test exopolysaccharides (EPS) for its antiviral activity against KHV, by monitoring inhibition and cytotoxic effects in common carp brain cells. These substances can be easily extracted from extracellular algae supernatant and were identified as groups of sulphated polysaccharides. In order to reach this aim, Arthrospira platensis, which is well known for its antiviral activity of intra- and extracellular compounds towards mammalian herpesviruses, was investigated as standard organism and compared to commercial antiviral drug, ganciclovir, which inhibits the viral DNA polymerization...
April 19, 2017: Journal of Fish Diseases
https://www.readbyqxmd.com/read/28383126/aeromonas-jandaei-and-aeromonas-veronii-caused-disease-and-mortality-in-nile-tilapia-oreochromis-niloticus-l
#11
H T Dong, C Techatanakitarnan, P Jindakittikul, A Thaiprayoon, S Taengphu, W Charoensapsri, P Khunrae, T Rattanarojpong, S Senapin
Diseases caused by motile aeromonads in freshwater fish have been generally assumed to be linked with mainly Aeromonas hydrophila while other species were probably overlooked. Here, we identified two isolates of non-A. hydrophila recovered from Nile tilapia exhibiting disease and mortality after exposed to transport-induced stress and subsequently confirmed their virulence in artificial infection. The bacterial isolates were identified as Aeromonas jandaei and Aeromonas veronii based on phenotypic features and homology of 16S rDNA...
April 6, 2017: Journal of Fish Diseases
https://www.readbyqxmd.com/read/28300290/isolation-of-infectious-microalga-prototheca-wickerhamii-from-a-carp-cyprinus-carpio-a-first-confirmed-case-report-of-protothecosis-in-a-fish
#12
T Jagielski, M Dyląg, U Roesler, J Murugaiyan
Protothecosis is a rare infection caused by environmentally ubiquitous achlorophyllic microalgae of the genus Prototheca. Here, we describe a first case of protothecosis in a carp (Cyprinus carpio), which is at the same time the first case of protothecosis in a fish, confirmed by phenotype- and molecular-based methods, including PCR sequencing of the rDNA cluster and protein profiling using matrix-assisted laser desorption ionization time-of-flight mass spectrometry.
March 16, 2017: Journal of Fish Diseases
https://www.readbyqxmd.com/read/28261806/development-and-use-of-an-arctic-charr-cell-line-to-study-antiviral-responses-at-extremely-low-temperatures
#13
S L Semple, N T K Vo, A R Li, P H Pham, N C Bols, B Dixon
Arctic charr (Salvelinus alpinus) are the northernmost distributed freshwater fish and can grow at water temperatures as low as 0.2 °C. Other teleost species have impaired immune function at temperatures that Arctic charr thrive in, and thus, charr may maintain immune function at these temperatures. In this study, a fibroblastic cell line, named ACBA, derived from the bulbus arteriosus (BA) of Arctic charr was developed for use in immune studies at various temperatures. ACBA has undergone more than forty passages at 18 °C over 3 years, while showing no signs of senescence-associated β-galactosidase activity and producing nitric oxide...
March 6, 2017: Journal of Fish Diseases
https://www.readbyqxmd.com/read/28261804/ca-branchiomonas-cysticola-ca-piscichlamydia-salmonis-and-salmon-gill-pox-virus-transmit-horizontally-in-atlantic-salmon-held-in-fresh-water
#14
J Wiik-Nielsen, M Gjessing, H T Solheim, A Litlabø, A-G Gjevre, A B Kristoffersen, M D Powell, D J Colquhoun
Elucidation of the role of infectious agents putatively involved in gill disease is commonly hampered by the lack of culture systems for these organisms. In this study, a farmed population of Atlantic salmon pre-smolts, displaying proliferative gill disease with associated Candidatus Branchiomonas cysticola, Ca. Piscichlamydia salmonis and Atlantic salmon gill pox virus (SGPV) infections, was identified. A subpopulation of the diseased fish was used as a source of waterborne infection towards a population of naïve Atlantic salmon pre-smolts...
March 6, 2017: Journal of Fish Diseases
https://www.readbyqxmd.com/read/28252208/a-fluorescence-based-assay-for-in%C3%A2-vitro-screening-of-saprolegnia-inhibitors
#15
S E Ali, I Skaar
The incidence of fish pathogenic oomycetes, Saprolegnia, has increased significantly in aquaculture since the ban of malachite green. For the efficient characterization of anti-Saprolegnia therapeutics, simple accurate methods are required. However, the current screening methods are limited by time, and none of them are confirming the viability of treated spores or hyphae. In this study, a modified fluorescence-based assay for the in vitro screening of Saprolegnia inhibitors has been developed. This method involves the use of FUN-1 viability dye combined with calcofluor white M2R, and is based on the formation of orange-red cylindrical intravacuolar structures (CIVS) in metabolically active spores, hyphae and biofilms...
March 2, 2017: Journal of Fish Diseases
https://www.readbyqxmd.com/read/28252178/isolation-identification-and-pathogenicity-of-vibrio-harveyi-the-causal-agent-of-skin-ulcer-disease-in-juvenile-hybrid-groupers-epinephelus-fuscoguttatus%C3%A2-%C3%A3-%C3%A2-epinephelus-lanceolatus
#16
G M Shen, C Y Shi, C Fan, D Jia, S Q Wang, G S Xie, G Y Li, Z L Mo, J Huang
The hybrid grouper, Epinephelus fuscoguttatus (♀) × Epinephelus lanceolatus (♂), is a newly bred cultivated marine fish species of high economic value. However, a skin ulcer disease with high mortality has occurred, and the responsible pathogen remains unknown. In this study, we summarized the epidemic status and external signs of this disease. We screened potential pathogens and finally isolated one bacterial strain ML01 from affected fish. We subjected healthy juvenile hybrid groupers to bacterial challenge tests with the isolate by immersion, immersion after dermal abrasion and intraperitoneal injection, respectively...
March 2, 2017: Journal of Fish Diseases
https://www.readbyqxmd.com/read/28252175/current-knowledge-of-metabolomic-approach-in-infectious-fish-disease-studies
#17
REVIEW
C-F Low, M Z H Rozaini, N Musa, B Syarul Nataqain
The approaches of transcriptomic and proteomic have been widely used to study host-pathogen interactions in fish diseases, and this is comparable to the recently emerging application of metabolomic in elucidating disease-resistant mechanisms in fish that gives new insight into potential therapeutic strategies to improve fish health. Metabolomic is defined as the large-scale study of all metabolites within an organism and represents the frontline in the 'omics' approaches, providing direct information on the metabolic responses and perturbations in metabolic pathways...
March 2, 2017: Journal of Fish Diseases
https://www.readbyqxmd.com/read/28239935/isolation-and-characterization-of-an-atypical-siberian-sturgeon-herpesvirus-strain-in-russia-novel-north-american-acipenserid-herpesvirus-2-strain-in-europe
#18
A Doszpoly, I M Kalabekov, R Breyta, I S Shchelkunov
Siberian sturgeon herpesvirus (SbSHV) was isolated in Russia for the first time in 2006. Nine SbSHV isolates were recovered from different fish hatcheries producing the same cytopathic effect in cell cultures, the same clinical signs and mortality kinetics in virus-infected fish and the same virus neutralization pattern and shared identical nucleotide sequences. In 2011, a new isolate was recovered from juvenile sturgeon, which caused completely different cytopathic effect. That isolate was not readily neutralized by Siberian sturgeon hyperimmune antisera, and its DNA was not recognized by the routine PCR developed for SbSHV detection...
February 27, 2017: Journal of Fish Diseases
https://www.readbyqxmd.com/read/28188658/in-vivo-adherence-of-flavobacterium-psychrophilum-to-mucosal-external-surfaces-of-rainbow-trout-oncorhynchus-mykiss-fry
#19
A Papadopoulou, I Dalsgaard, A Lindén, T Wiklund
The adherence of Flavobacterium psychrophilum to surfaces of epithelial tissues has been inconclusively suggested as a mechanism, which enables the bacterium to invade the host. Hence, the present study aimed to examine the adherence of the cells of two colony phenotypes, smooth and rough, of F. psychrophilum to mucosal tissues of rainbow trout fry and to test the skin mucus as a nutrient for the growth of F. psychrophilum. Fish were immersed in water containing 10(6 ) CFU( ) mL(-1) F. psychrophilum for each colony phenotype...
February 11, 2017: Journal of Fish Diseases
https://www.readbyqxmd.com/read/28188652/water-temperature-and-dietary-histidine-affect-cataract-formation-in-atlantic-salmon-salmo-salar-l-diploid-and-triploid-yearling-smolt
#20
F Sambraus, P G Fjelldal, S C Remø, E M Hevrøy, T O Nilsen, A Thorsen, T J Hansen, R Waagbø
The aim of the present study was to investigate cataract development in diploid (2N) and triploid (3N) Atlantic salmon smolts and post-smolts at two water temperatures (10 and 16 °C) given diets with different histidine supplementation (LH, 10.4 and HH, 13.1 g kg(-1) ) before and after seawater transfer. In freshwater, a severe cataract outbreak was recorded in both ploidies reared at 16 °C. The cataract score was significantly higher in triploids compared to diploids, and the severity was lower in both ploidies fed the HH diet...
February 11, 2017: Journal of Fish Diseases
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