Journal of aquatic animal health最新文献

{"title":"First isolation of Carnobacterium maltaromaticum from farmed Rainbow Trout in Virginia","authors":"Stephen A. Smith,&nbsp;Shelley J. Newman,&nbsp;Courtney E. Harrison,&nbsp;Thomas P. Loch","doi":"10.1002/aah.10176","DOIUrl":"10.1002/aah.10176","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Objective</h3>\u0000 \u0000 <p><i>Carnobacterium maltaromaticum</i> is considered an emerging pathogen of salmonids in the United States and around the world.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>Bacterial cultures obtained from the posterior kidney and skin of moribund Rainbow Trout <i>Oncorhynchus mykiss</i> from a commercial aquaculture facility in Virginia, USA, grew <i>C. maltaromaticum</i>, which was confirmed by additional phenotypic and molecular characterization.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Result</h3>\u0000 \u0000 <p>A presumptive diagnosis based on the clinical signs, necropsy observations, histopathology, and bacterial cultures was bacterial septicemia due to <i>C. maltaromaticum</i>.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusion</h3>\u0000 \u0000 <p>This represents the first documentation of <i>C. maltaromaticum</i> in Rainbow Trout from Virginia.</p>\u0000 </section>\u0000 </div>","PeriodicalId":15235,"journal":{"name":"Journal of aquatic animal health","volume":"35 1","pages":"3-10"},"PeriodicalIF":1.2,"publicationDate":"2022-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/aah.10176","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9236905","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparison of injection and immersion challenges of Renibacterium salmoninarum strains in Rainbow Trout","authors":"Tifani R. Watson,&nbsp;Timothy J. Bruce,&nbsp;Jie Ma,&nbsp;Kenneth D. Cain","doi":"10.1002/aah.10175","DOIUrl":"10.1002/aah.10175","url":null,"abstract":"<p>\u0000 \u0000 </p>","PeriodicalId":15235,"journal":{"name":"Journal of aquatic animal health","volume":"35 1","pages":"34-40"},"PeriodicalIF":1.2,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9236595","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Candida Manassasensis Infection in Mass Mortality Case of Siberian Sturgeon Acipenser Baerii Fingerlings in the Republic of Korea: A Case Report","authors":"Sang Wha Kim,&nbsp;Se Jin Han,&nbsp;Sib Sankar Giri,&nbsp;Sang Guen Kim,&nbsp;Jun Kwon,&nbsp;Sung Bin Lee,&nbsp;Se Chang Park","doi":"10.1002/aah.10167","DOIUrl":"10.1002/aah.10167","url":null,"abstract":"<p>With the growing demand for caviar products, sturgeon (family Acipenseridae) have become some of the most popular species in the aquaculture industry. Since sturgeon need more than 10 years to become sexually mature, protection against fatal diseases becomes particularly important in the industry. In March 2018, approximately 10% of Siberian Sturgeon <i>Acipenser baerii</i> fingerlings in a sturgeon hatchery in Jeolla Province, Republic of Korea, exhibited anorexia, abdominal distension, buoyancy loss, and abnormal behavior and eventually showed a 90% fatality rate. Twenty moribund fish were necropsied, and a distended stomach filled with gas was found in every case. A single colony dominated the intestinal lumen smear and was identified as <i>Candida manassasensis</i> by polymerase chain reaction targeting 18S ribosomal RNA. The same microorganism was also detected in the sturgeons' feed. Antifungal resistance was examined using the VITEK 2 system, and the isolate was susceptible to voriconazole, caspofungin, micafungin, and flucytosine. The environmental stress factor for this case was speculated as decreased water temperature. Since similar cases have been observed for many years, further research to optimize precise treatment and prevention methods is required.</p>","PeriodicalId":15235,"journal":{"name":"Journal of aquatic animal health","volume":"34 4","pages":"167-173"},"PeriodicalIF":1.2,"publicationDate":"2022-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10836984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Molecular isolation and expression analysis of hemocyanin isoform 2 of Macrobrachium rosenbergii","authors":"Chutima Srisuk,&nbsp;Chanitcha Choolert,&nbsp;William G. Bendena,&nbsp;Siwaporn Longyant,&nbsp;Paisarn Sithigorngul,&nbsp;Parin Chaivisuthangkura","doi":"10.1002/aah.10173","DOIUrl":"10.1002/aah.10173","url":null,"abstract":"<p>\u0000 \u0000 </p>","PeriodicalId":15235,"journal":{"name":"Journal of aquatic animal health","volume":"34 4","pages":"208-220"},"PeriodicalIF":1.2,"publicationDate":"2022-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10853414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Isolation and Characterization of Aeromonas jandaei from Nile Tilapia in Lake Volta, Ghana, and Its Response to Antibiotics and Herbal Extracts","authors":"E. D. Abarike,&nbsp;R. A. Atuna,&nbsp;S. Agyekum,&nbsp;D. N. Akongyuure,&nbsp;E. H. Alhassan","doi":"10.1002/aah.10165","DOIUrl":"10.1002/aah.10165","url":null,"abstract":"<p>Production of Nile Tilapia <i>Oreochromis niloticus</i> contributes to economic growth in many countries. However, there has been a decline in its production over the years due to the influx of bacterial infections, with <i>Aeromonas jandaei</i> as an emerging threat. In this study, we identified and characterized <i>A. jandaei</i> from cage-cultured Nile Tilapia in Akosombo Stratum II of Lake Volta in Ghana and evaluated its response to commonly used antibiotics using the disc diffusion and agar well diffusion methods for herbal extracts at various concentrations (10, 30, 50, 70, and 100 mg/mL). The herbs considered included guava <i>Psidium guajava</i> leaf, bitter leaf <i>Vernonia amygdalina</i>, neem <i>Azadirachta indica</i> leaf, and their cocktail (GBNL in the ratio of 1:1:1). The bacterium was isolated from swab samples from the head kidneys of 27 moribund Nile Tilapia collected from nine fish farms. Samples were screened for <i>A. jandaei</i> by culturing and identification using morphological and molecular techniques. The bacterium isolate from fish in the study, identified as <i>A. jandaei</i> GH-AS II, had 92–93% identity to <i>A. jandaei</i> reference strains. Infection of healthy Nile Tilapia (<i>n</i> = 210) with the bacterium isolate showed that 1.0 × 10⁵ CFU/mL was the lethal dose causing 50% mortality. Antibiotic susceptibility testing showed that <i>A. jandaei</i> GH-AS II was resistant to tetracycline and ampicillin. Herbal extracts at the various concentrations inhibited the growth of the bacterium isolate, with a significant increment in the zones of inhibition with increasing concentrations of leaf extracts. However, GBNL showed prominence compared to the other extracts only at 100 mg/mL. Management of <i>A. jandaei</i> GH-AS II by using herbal extracts at Nile Tilapia farms in Lake Volta may be recommended since the use of antibiotics, such as tetracycline and ampicillin, may not yield the needed result.</p>","PeriodicalId":15235,"journal":{"name":"Journal of aquatic animal health","volume":"34 3","pages":"140-148"},"PeriodicalIF":1.2,"publicationDate":"2022-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10415855","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Review of Salinity's Impact on Relevant Aquatic Drug Approval Technical Sections","authors":"Shane Ramee","doi":"10.1002/aah.10168","DOIUrl":"10.1002/aah.10168","url":null,"abstract":"Currently, in the USA, there are no aquatic animal drugs approved for use in saltwater-reared finfish. As U.S. aquaculture expands into the marine environment, it is imperative to maximize the current knowledge base to make new approvals for saltwater use as efficient as possible. This article reviews literature relevant to how the saltwater environment may affect the Effectiveness, Target Animal Safety, and Human Food Safety major technical sections of a new animal drug approval. Though research on this subject is limited, there are pharmacokinetic and toxicological studies that have utilized euryhaline species to isolate salinity as the independent variable. I summarize these studies to demonstrate patterns that could facilitate more effective and efficient transfer of data previously used for freshwater drug approvals to be used for potential saltwater approvals. Research suggests that drug residue clearance rates are generally faster or at least similar in salt water if other factors are held constant, suggesting that consistent or shorter withdrawal times may be appropriate for saltwater application. However, faster clearance rates may cause a reduction in efficacy in some cases. The effects of salt water on drug toxicity are much less clear, are possibly highly compound dependent, and deserve further research. This suggests that any future drug approvals for saltwater use should begin by identifying the appropriate effective dose in salt water before addressing the other technical sections.","PeriodicalId":15235,"journal":{"name":"Journal of aquatic animal health","volume":"34 3","pages":"149-155"},"PeriodicalIF":1.2,"publicationDate":"2022-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40377520","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Expression profiling and inflammatory activation analysis of high-mobility group box 1 in Schizothorax prenanti","authors":"Defang Chen,&nbsp;Lu Lu,&nbsp;Hong Wang,&nbsp;Shuang Peng,&nbsp;Jiaxi Liu,&nbsp;Xin Zhang,&nbsp;Zhiqiong Li,&nbsp;Xiaoli Huang,&nbsp;Ping Ouyang,&nbsp;Lianshi Qu,&nbsp;Yi Geng","doi":"10.1002/aah.10172","DOIUrl":"10.1002/aah.10172","url":null,"abstract":"<p>\u0000 \u0000 </p>","PeriodicalId":15235,"journal":{"name":"Journal of aquatic animal health","volume":"34 4","pages":"174-183"},"PeriodicalIF":1.2,"publicationDate":"2022-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10484569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Use of computed tomography and magnetic resonance imaging to assess a case of spinal injury in a Showa koi Cyprinus carpio","authors":"Fred J. Torpy,&nbsp;Jessica R. Comolli,&nbsp;Karine P. Gendron,&nbsp;Abigail R. Armwood,&nbsp;Alvin C. Camus,&nbsp;Spencer P. Kehoe,&nbsp;Stephen J. Divers","doi":"10.1002/aah.10171","DOIUrl":"10.1002/aah.10171","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Objective</h3>\u0000 \u0000 <p>A privately owned, 4-year-old female Showa koi (ornamental variant of Common Carp <i>Cyprinus carpio</i>) was presented for erratic swimming, air gasping, water spitting, and abnormal orientation in the water column. Initial physical examination revealed an obese patient with no external abnormalities except a small plaque localized to filaments on a right gill hemibranch.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>The fish was anesthetized using AQUI-S 20E (10% eugenol solution) at 50 mg/L to facilitate diagnostic evaluation. Biopsy of the gill lesion yielded no significant findings. Whole-body computed tomography confirmed an excess of adipose tissue and mild scoliosis, with narrowing of the 10th–11th intervertebral space. A weight loss plan and need for repeat assessment were recommended.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Result</h3>\u0000 \u0000 <p>The patient's original abnormal behaviors resolved over the following weeks, but it subsequently became hyporexic and depressed. Full-body magnetic resonance imaging (MRI) showed extensive alteration of vertebral centra, with multifocal compression of the spinal cord. Due to the patient's declining clinical condition and the grave prognosis based on MRI findings, the patient was humanely euthanized.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusion</h3>\u0000 \u0000 <p>Postmortem examination showed severe transmural myelomalacia associated with a vertebral subluxation. This case demonstrates the practical application of advanced cross-sectional imaging that has not been commonly afforded to fish or other lower vertebrates.</p>\u0000 </section>\u0000 </div>","PeriodicalId":15235,"journal":{"name":"Journal of aquatic animal health","volume":"35 1","pages":"11-19"},"PeriodicalIF":1.2,"publicationDate":"2022-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/aah.10171","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9237183","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of Francisella orientalis ΔpdpA as a Live Attenuated Vaccine against Piscine Francisellosis in Nile Tilapia","authors":"Fernanda de Alexandre Sebastião,&nbsp;John D. Hansen,&nbsp;Esteban Soto","doi":"10.1002/aah.10166","DOIUrl":"10.1002/aah.10166","url":null,"abstract":"<p><i>Francisella orientalis</i> is an important bacterial pathogen of marine and freshwater fish with worldwide distribution. Fish francisellosis is a severe subacute to chronic granulomatous disease, with high mortalities and high infectivity rates in cultured and wild fish. To date, there is no approved vaccine for this disease. In this study, we evaluated the efficacy of a defined <i>F. orientalis</i> pathogenicity determinant protein A (<i>pdpA</i>) mutant (Δ<i>pdpA</i>) as a live attenuated immersion vaccine against subsequent immersion challenge with the wild-type organism. Immunized Nile tilapia <i>Oreochromis niloticus</i> were protected (45% relative percent survival) from the lethal challenges and presented significantly lower mortality than nonvaccinated and challenged treatments. Although serum IgM was significantly higher in immunized fish, similar bacterial loads were detected in vaccinated and nonvaccinated survivors. In conclusion, although the <i>F. orientalis</i> Δ<i>pdpA</i> is attenuated and effectively stimulated an adaptive immune response, the low relative percent survival and high bacterial persistence in survivors of immunized and challenged treatments indicates low suitability of Δ<i>pdpA</i> as a mucosal vaccine for tilapia under conditions used in this study.</p>","PeriodicalId":15235,"journal":{"name":"Journal of aquatic animal health","volume":"34 3","pages":"134-139"},"PeriodicalIF":1.2,"publicationDate":"2022-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40631728","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Phenotypic differences between Edwardsiella piscicida and Edwardsiella anguillarum isolates in Japan","authors":"Hidehiro Sugiura,&nbsp;Kosuke Fukunishi,&nbsp;Hidemasa Kawakami,&nbsp;Masayuki Imajoh","doi":"10.1002/aah.10169","DOIUrl":"10.1002/aah.10169","url":null,"abstract":"<p>\u0000 \u0000 </p>","PeriodicalId":15235,"journal":{"name":"Journal of aquatic animal health","volume":"34 4","pages":"197-207"},"PeriodicalIF":1.2,"publicationDate":"2022-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10490221","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}