Advances in vaccines developed for bacterial fish diseases, performance and limits

2021 ◽  
Author(s):  
Said Ben Hamed ◽  
Silvana Teresa Tapia‐Paniagua ◽  
Miguel Ángel Moriñigo ◽  
Maria José Tavares Ranzani‐Paiva
Keyword(s):  
Fish Diseases

Studies on Prevailing Parasitic Fish Diseases in Pre-mature Cultured Sea bass, Dicentrarchus labrax, Sea bream and Mugil cephalus at Ismailia, Province with Special References to Control

2020 ◽  
Keyword(s):  
Parasitic Infection ◽  
Dicentrarchus Labrax ◽  
Sea Bass ◽  
Mugil Cephalus ◽  
Sea Bream ◽  
Fish Diseases ◽  
Total Prevalence ◽  
Dark Colour ◽  
Gill Filaments ◽  
Mature Fish

This study concentrated on the assessment of the prevailing parasitic fish diseases in some marine fishes at Ismailia province and how to control the infestation using microalgae. This study was carried out on 1080 pre-mature fish (360 D. labrax (225±25 g) and 360 S aurata (150±25 g) and 360 M. cephalus (125±25 g) collected from similar ponds of studies to be examined at the end of treatment. In addition to that we followed non-treated fish (1080 premature). The infested fish showed dark colour and respiratory signs. Post mortem lesions were a presence of congestion or paleness and destruction of gill filaments. The total prevalence of infestation was the total prevalence of parasitic infection of non-treated fishes was 45.83 %. The highest percentage was in D. labrax 56.94 % followed by S. aurata 47.22%, the lowest percentage in M. cephalus 33.33. The total prevalence of parasitic infection in premature treated with 2 g algae was 28.79%, followed by 3 g algae was 23.60 %, while the lowest percentage with 5 g algae was 20.37 % respectively. The detected species of parasites were protozoal parasites, Amyloodinium ocellatum and Riboscyphidia in additions of marine monogenea, Lamellodiscus diplodicus isolated from D Labrex, Mugil Cephalus and S aurata. The present study concluded that, the use of microalgae instead of fish meal decreased parasitic infestation in marine fish. The histopathological alteration of natural infested examined fishes was also recorded.

scholarly journals Shared jurisdiction between veterinarians and aqua medicine biologists in fish health—a Norwegian model for inter-professional and cross-sectoral collaboration

2020 ◽  
Author(s):  
Wenche M. Kjæmpenes
Keyword(s):  
Scientific Knowledge ◽  
Disease Outbreaks ◽  
Early Response ◽  
Marine Science ◽  
Fish Health ◽  
Fish Diseases ◽  
Aquaculture Industry ◽  
The Right ◽  
The University ◽  
Key Events

Abstract This article investigates, using a sociology of profession approach, why veterinarians and aqua medicine biologists share jurisdiction in fish health in Norway. I use a five-actor framework to highlight key events in the development of the Norwegian model for inter-professional and cross-sectoral collaboration in fish health. Veterinarians were initially the only profession involved in fish health. However, in the late 1980s, the Norwegian aquaculture industry suffered great losses due to significant disease outbreaks. Lack of scientific knowledge about the disease causing the outbreaks, Hitra disease, and lack of veterinary capacity to cope with the problem resulted in a situation in which veterinarians continued, as an early response to the disease, to use antibiotic-based therapies. The marine science milieu, with support from the aquaculture industry, instituted a vaccine solution to the endemic Hitra disease in 1987. This scientific breakthrough had major impacts on combatting fish diseases and on the further development of vaccines. New vaccine solutions for other diseases, such as furunculosis, were developed by international and multidisciplinary collaboration. Over a 7-year period, the use of antibiotic-based therapy was dramatically reduced. The control of fish diseases is aquaculture’s X factor, and without these vaccine solutions and regulation regimes, the story of Norwegian aquaculture could have been different. The successful development of the Hitra disease vaccine enabled the marine science milieu at the University of Bergen and the University of Tromsø to establish a new programme of education for aqua medicine biologists based on their own scientific knowledge base. However, their struggle for shared jurisdiction, including the right to prescribe veterinary medicine, lasted nearly 20 years. In 2005, veterinary legislation was amended, and in addition to medical doctors, dentists and veterinarians, aqua medicine biologists, as the fourth profession in Norway, gained the right to prescribe medical products. I argue that the experience in Norway, where professionals from two different sectors share jurisdiction and work side by side in fish health, is worth examining as a model for organizing inter-professional and cross-sectoral collaboration.

Selected Bacterial Fish Diseases

1976 ◽  
pp. 143-151 ◽  
Author(s):  
E. B. Shotts ◽  
S. F. Snieszko
Keyword(s):  
Fish Diseases

scholarly journals Improving disease prevention and treatment in controlled fish culture

2016 ◽  
Vol 24 (3) ◽  
pp. 115-165 ◽  
Author(s):  
Elżbieta Terech-Majewska
Keyword(s):  
Disease Prevention ◽  
Resistance Mechanisms ◽  
Fish Culture ◽  
Long Term Results ◽  
Simultaneous Action ◽  
Primary Methods ◽  
Environmental Threats ◽  
Fish Diseases ◽  
Prevention And Treatment ◽  
Other Substances

Abstract The aim of the work was to evaluate long-term results of studies focusing on improving methods for preventing and treating fish diseases using selected natural and syntetic immunomodulators and vaccines in fish culture. Simultaneously, attention is drawn to infectious or environmental threats against which appropriately composed immunoprophylaxis can be used in production cycles. Fish culture is intensifying in Poland and globally, which means that the role of prevention and well-designed prophylaxis is of increasing significance to the prevention and treatment of fish diseases. Currently, 33 fish species are cultured in Poland as stocking material or for production. The primary methods for preventing diseases in controlled fish culture are ensuring the welfare of fish and other prophylactic methods, including immunoprophylaxis. Many infectious and non-infectious threats that can cause direct losses and limit fish culture are present in the aquatic environment. Fish diseases generally stem from the simultaneous action of many factors that coincide and are difficult to distinguish. Pesticides (organochlorine insecticides, organophosphorus herbicides), aromatic hydrocarbons, pentachlorophenol, heavy metals, and chemotherapeutics are particularly toxic to fish. Biodegradation, which is continual in aquatic environments, is a process by which toxic and other substances that negatively affect fish become bioavailable and impact the immune system, the functioning of which is a specific bioindicator of environmental quality. Innate immunity plays a key role in the defense against disadvantageous factors, which also include pathogens. Immunomodulation methods can protect resistance mechanisms, thereby increasing disease prevention and treatment in controlled fish culture.

Microorganisms From Some Tropical Fish Diseases

1968 ◽  
Vol 25 (1) ◽  
pp. 197-201 ◽  
Author(s):  
L. J. Almeida ◽  
E. J. Da Silva ◽  
Yvonne M. Freitas
Keyword(s):  
Tropical Fish ◽  
Fish Diseases

not available

scholarly journals Conditioning of Praziquantel and Florfenicol for some Heterologous Coinfections of Farmed Carp

2019 ◽  
Vol 70 (7) ◽  
pp. 2404-2409
Author(s):  
Andrei Cristian Lupu ◽  
Mihaela Bombos ◽  
Cristian Alin Barbacariu ◽  
Constantin Roman ◽  
Raluca Mindru ◽  
...  
Keyword(s):  
Controlled Release ◽  
Sunflower Oil ◽  
Castor Oil ◽  
Water Diffusion ◽  
Route Of Administration ◽  
Effective Alternative ◽  
Sorbitan Monooleate ◽  
Fish Diseases ◽  
The Stability

Coinfections can alter the course and severity of different fish diseases. Suspensions of praziquantel (PZQ) and florfenicol (FFC ) based on sunflower oil can be an effective alternative for treating fish coinfections. The use of polyoxyethylene (20) sorbitan monooleate in the presence of ethoxylated castor oil in the preparation of PZQ and FFC suspensions has improved the stability of these suspensions. This PZQ and FFC preparation can be used in the treatment of parasitic/bacterial heterologous coinfections. The suspension of the PZQ and FFC preparation can be administered by water-diffusion, having a controlled release. The compounds are biodegradable and the route of administration remains safe for the environment.

scholarly journals Monitoring of fish diseases in the Magadan region

2021 ◽  
Vol 36 ◽  
pp. 07008
Author(s):  
E.A. Vitomskova
Keyword(s):  
Pacific Salmon ◽  
Animal Health ◽  
Natural Populations ◽  
Clinical Signs ◽  
Commercial Fish ◽  
Fish Diseases ◽  
North East ◽  
Comparative Aspect ◽  
Different Seasons

In such a large region as the Far North-East of Russia, there is still no purposeful ichthyopathological study of fish diseases, which has epizootic and epidemiological significance. The material for the study was commercial fish caught in different seasons of 1995-2021. As a result of the research, individuals of natural populations and in aquaculture with clinical signs of infectious and parasitic diseases were found, and cultures of virulent strains of microorganisms were isolated. According to the results of the parasitological study, larvae of nematodes of the family Anisakidae and plerocercoids of cestodes Diphyllobothriidae, which have important epidemiological and epizootic significance, were registered. Based on long-term ichthyopathological studies, a retrospective review of own data was carried out. The analysis of infectious diseases of mature individuals of anadromous Pacific salmon of the genus Oncorhynchus, as well as long-term parasitological monitoring in a comparative aspect of the invasion of commercial fish by helminths dangerous to human and animal health, is presented.

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