An Acute Viral Disease of Channel Catfish PDF Download

Author: Nilola N. Fijan
Publisher:
ISBN:
Category : Channel catfish virus disease
Languages : en
Pages : 16

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Book Description
In epizootics of channel catfish virus diseasse (CCVD) at four widely separated fish farms in 1968, affected fry and fingerlings spiraled, hung in a vertical position with head at the surface, or were distressed. In various combinations were edema, hemorrages, and anemia. The disease had a peracute to acute course, and stress to the fish preceded most epizootics. The virus induced formation of syncytial cells in affected cultures, which is considered at present to be of diagnostic significance. Secondary bacterial infections were found in fish with CCVD. Columnaris infection masked the symptoms of the virus disease.

Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Author: John A. Plumb
Publisher:
ISBN:
Category : Channel catfish
Languages : en
Pages : 12

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Author: Melody Janet Jensen
Publisher:
ISBN:
Category :
Languages : en
Pages : 210

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Author: Patrick T K Woo
Publisher: CABI
ISBN: 1780647786
Category : Technology & Engineering
Languages : en
Pages : 378

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Book Description
Taking a disease-based approach, Fish Viruses and Bacteria: Pathobiology and Protection focuses on the pathobiology of and protective strategies against the most common, major microbial pathogens of economically important marine and freshwater fish. The book covers well-studied, notifiable piscine viruses and bacteria, including new and emerging diseases which can become huge threats to local fish populations in new geographical regions if transported there via infected fish or eggs. An invaluable bench book for fish health consultants, veterinarians and all those wanting instant access to information, this book is also a useful textbook for students specializing in fish health and research scientists initiating fish disease research programmes.

Author: Charles M. Heartwell
Publisher:
ISBN:
Category : Channel catfish
Languages : en
Pages : 44

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Book Description
Partial antibody characterization indicates that specific channel catfish immunoglobulins are macroglobulins with characteristics like those of most fish immunoglobulins and similar to those of human immunoglobulin-M.

Author: Sunil K. Lal
Publisher: Karger Medical and Scientific Publishers
ISBN: 3805581750
Category : Medical
Languages : en
Pages : 322

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Experts discuss the threat posed by emerging viruses and describe ongoing efforts to face future outbreaks by searching for new antivirals, developing new vaccines, and improving methods of diagnosis and surveillance. Australian contributor.

Author: Ken Wolf
Publisher: Cornell University Press
ISBN: 1501746383
Category : Science
Languages : en
Pages : 491

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Book Description
This book is a comprehensive, generously illustrated, and up-to-date reference on the virology of fishes—predomiantly species of the class Osteichthyes, but including representative members of the classes Chrondrichthyes and Myxini. It covers some thirty years since the first virus was isolated from a fish and describes 63 diseases and agents of viral, viruslike, or mistaken viral nature.

Author: Joseph P. McCraren
Publisher:
ISBN:
Category : Channel catfish virus disease
Languages : en
Pages : 6

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Author: Arun Venugopalan
Publisher:
ISBN:
Category :
Languages : en
Pages : 0

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Book Description
Channel catfish virus disease (CCVD) is the principal viral disease in the United States catfish industry. The CCVD is caused by channel catfish virus (CCV), with mortality reaching up to 100% in fingerlings. CCV is assigned taxonomically to the family Alloherpesviridae, genus Ictalurivirus, species Ictalurid herpesvirus 1 (IcHV-1). To date, virulence, immunogenicity, and genome plasticity of the CCV field isolates have not been investigated. Three genotypes of CCV (IcHV-1A, IcHV-1B, and BCAHV) were identified using restriction fragment length polymorphism (RFLP) analysis. Virulence assessment of three representative isolates of RFLP groups suggests that IcHV-1B (pooled survival [mean ℗ł SE]: 58.3% ℗ł 2.6) showed significantly lower survival than IcHV-1A (68.6% ℗ł 2.4). Re-exposure of the survivors with a representative of IcHV-1A and IcHV-1B isolates indicates a robust cross-protective effect (relative percent survival [RPS]: 80-100%). Antigenic determinants against anti-CCV monoclonal antibody Mab-95 were conserved among IcHV-1A, and IcHV-1B; however, BCAHV possesses antigenically distinct epitopes (Neutralization index [NI] = 0). Although BCAHV and CCV have nearly colinear genomes (except for the absence of ORF16A in CCV), they represent distinct species, given that nucleotide identity is 93.9%. Moreover, infectivity trials indicated that channel and hybrid catfish fingerlings might be refractive to LD50 (1.3©7105 TCID50/L) dosage of BCAHV. However, previous exposure to BCAHV has protected the channel and hybrid catfish against the subsequent infection with the ATCC strain of CCV (RPS:100%). Next, two discriminatory duplex probe-based qPCR assays were designed and validated to diagnose latent IcHV-1A and IcHV-1B. Spatio-temporal survey of six Mississippi catfish hatcheries indicated that the prevalence of latent CCV genotypes varied between 25-100%. Lastly, twenty one reference quality genomes of CCV field isolates were assembled, and phylogenomic analyses supported the monophyly of the CCV field isolates with BCAHV as their closest relative. The phylogenomic analyses confirmed the two distinct genotypes (IcHV-1A and IcHV-1B) identified in RFLP analysis and further allowed the segregation of the IcHV-1A genotype into two subgroups, IcHV-1A1 and IcHV-1A2. Results from the current studies lay the foundation for future research and will help formulate efficient management strategies to reduce the economic impact of CCV in the catfish industry.