Hydrogen peroxide is widely used as a treatment of ectoparasite (e.g. salmon lice, amoebic gill disease) affected Atlantic salmon (Salmo salar) in aquaculture but has frequently caused unacceptable levels of mortality.

07/01/2021

Branchial surfaces of finfish species contain a microbial layer rich in commensal bacteria which can provide protection through competitive colonization and production of antimicrobial products. Upon disturbance or compromise, pathogenic microbiota may opportunistically infiltrate this protective barrier and initiate disease.

10/01/2021

Reiterative freshwater bathing is the main treatment to control amoebic gill disease (AGD) of farmed Atlantic salmon in Tasmania, Australia. Regular freshwater exposure appears to control ectoparasitic cymothoid isopods, which were only seen at high prevalence and intensity in summer when fish had not been treated for over 100 days.

05/01/2019

Amoebic gill disease (AGD) is one of the main health issues impacting farmed Atlantic salmon. Neoparamoeba perurans causes AGD; however, a diversity of other amoeba species colonizes the gills and there is little understanding of whether they are commensal or potentially involved in different stages of gill disease development.

12/01/2020

The marine protozoan parasite Neoparamoeba perurans has been established as the causative agent for amoebic gill disease (AGD) in Atlantic salmon (Salmo salar). Freshwater bathing is the only routinely used treatment for AGD in Australia while hydrogen peroxide (H2O2) is used in countries with cooler water temperatures.

12/01/2020

Marine farmed Atlantic salmon (Salmo salar) are susceptible to recurrent amoebic gill disease (AGD) caused by the ectoparasite Neoparamoeba perurans over the growout production cycle. The parasite elicits a highly localized response within the gill epithelium resulting in multifocal mucoid patches at the site of parasite attachment.

05/01/2021

Branchial surfaces of finfish species contain a microbial layer rich in commensal bacteria which can provide protection through competitive colonization and production of antimicrobial products. Upon disturbance or compromise, pathogenic microbiota may opportunistically infiltrate this protective barrier and initiate disease.

05/01/2021

Amoebic gill disease (AGD) is the primary health concern for Atlantic salmon Salmo salar farmed in Tasmania, Australia. Neoparamoeba perurans is the aetiological agent of AGD; however, a diversity of other amoebae colonise the gills, and their role in AGD is unknown.

08/01/2019

Amoebic Gill Disease remains the most important health issue for the Atlantic salmon industry in Tasmania. Significant progress was made during project 2008/218, including proving Koch’s postulates and development of a PCR based detection method.

04/01/2014

Scientists at the Institute for Marine and Antarctic Studies have completed a two year experimental project on a globally emerging fish disease. Dr Mark Adams and co-investigators Dr Andrew Bridle and Professor Barbara Nowak investigated the comparative susceptibility and host responses of various endemic and salmonid fishes to amoebic gill disease (AGD).

02/01/2016

Scientists at the Institute for Marine and Antarctic Studies have completed a two year experimental project on a globally emerging fish disease. Dr Mark Adams and co-investigators Dr Andrew Bridle and Professor Barbara Nowak investigated the comparative susceptibility and host responses of various endemic and salmonid fishes to amoebic gill disease (AGD).

02/02/2016

Commercial in confidence. To know more about this project please contact FRDC.

06/01/2016

The present project relates principally to Programs 1 (Environment) & 2 (Industry) of the FRDC’s Strategic priority areas. Specifically the project will increase the gross value of production, profit margins, productivity and opportunity (Theme 7) for Huon, through providing the company with a means to expand operations into offshore and more exposed fish farming areas.

09/01/2016

This project has successfully adapted an isolated perfused gill model specifically to Atlantic salmon and has provided in vitro results of gill function and branchial vascular resistance in AGD-affected animals. This model represents a novel in vitro method for AGD research.

09/01/2013

Prior to this project, our knowledge of Amoebic Gill Disease (AGD) was fundamentally limited. An improved understanding of host-pathogen interactions was required to provide a basis from which to develop effective strategies for future control and treatment of the disease.

08/01/2004

Amoebic Gill Disease (AGD) is the main health problem affecting salmon industry in Southern Tasmania. To improve management of fish with AGD on the farms, the industry needs better understanding of AGD epidemiology.

08/01/2004

Commercial in confidence. To know more about this project please contact FRDC.

12/01/2005

There is an urgent need to develop novel treatments which would reduce the impact of AGD on salmon industry. A detailed benefit – cost analysis for the AQUAFIN CRC AGD project was undertaken which gave a Net Present Value of the economic benefit of $21.6M, Benefit/Cost Ratio of 5.3.

01/01/2005

There is an urgent need to develop and commercialise treatments for the control of amoebic gill disease in the Atlantic salmon aquaculture industry in Tasmania. The cost-benefit analysis undertaken by the Aquafin CRC suggested a net present value of economic benefit of $21.6M AUD and a benefit/cost ratio of 5.3.

09/01/2007

Before this project our knowledge of immune response in Amoebic Gill Disease (AGD) was fundamentally limited and more information was required to assess the potential for immunomodulators in the management of AGD.

10/01/2007

This proposal is fulfilling objectives of Aquafin CRC Centre Agreement and it is within the key research areas for Aquatic Animal Health Subprogram Strategic R&D Plan

11/01/2007

Commercial salmonid culture in Australia is among the country's top three aquaculture sectors. The salmonid aquaculture industry is an important player in the Tasmanian economy.

06/01/2008

The most significant outcome of this project is the commencement in July 2007 of sea trials for the experimental DNA vaccine made up of six antigens shown to provide a relative increase in protection of approximately 40 percent in laboratory based amoebic gill disease (AGD) trials.

06/01/2008

Commercial in confidence. To know more about this project please contact FRDC.

06/01/2009

Commercial in confidence. To know more about this project please contact FRDC.

12/01/2009

Cumulative data from other parasites suggests that blocking of Aquaporin channels (AQPs) may provide a suitable target for the use of pharmaceuticals to control these diseases. Neoparamoeba share many similarities with other pathogens.

11/01/2010

Amoebic gill disease (AGD) remains the major disease associated with sea-cage culture of Atlantic salmon in Tasmania. AGD is associated with a Paramoeba species infecting the gills.

08/01/2001

Amoebic gill disease (AGD) is associated with extensive mortality and reduced production of Atlantic salmon in Tasmania. It is caused by the amoeba Neoparamoeba pemaquidensis that infects the gills of cultured salmon.

04/01/2002

An outcome to date is the use of molecular markers by a member of the Atlantic salmon industry to pedigree and estimate relatedness of broodstock for the commencement of a selective breeding program.

08/01/2004

Amoebic Gill Disease (AGD) is one of the most serious health issues for the Tasmanian salmonid farming industry and significantly increases production costs of Atlantic salmon in Tasmania (Nowak et al 2002).

01/01/2011

Not supplied

01/01/2012

This project has provided evidence of specific alleles/genotypes of EST03G12 that are associated with AGD resistance. Furthermore, differences in EST03G12 genotypes may be functional as the EST potentially encodes for a novel g-type lysozyme, an innate immune molecule, in Atlantic salmon.

01/01/2012

Amoebic gill disease (AGD), caused by the pathogenic free living protozoan Neoparamoeba perurans is the most significant health issue currently affecting the production of Tasmanian Atlantic salmon Salmo salar.

01/01/2013

One of the primary breeding goals of the Saltas selective breeding program is resistance to amoebic gill disease (AGD), which is the main health issue affecting production of Atlantic salmon (Salmo salar) in Tasmania.

01/01/2014

The main health issue affecting Atlantic salmon marine aquaculture in Tasmania is amoebic gill disease (AGD), a parasitic disease which causes extensive gill pathology. AGD is treated by proactively bathing fish in freshwater, based upon regular assessment of the intensity and frequency of gross gill signs (“gill score”) in each caged population.

01/01/2015

The causative agent of amoebic gill disease, Neoparamoeba perurans is reported to lose virulence during prolonged in vitro maintenance. In this study, the impact of prolonged culture on N. perurans virulence and its proteome was investigated.

01/01/2021