Featured Research

from universities, journals, and other organizations

Secretive Immune System Of Salmon

Date:
February 2, 2009
Source:
Norwegian School of Veterinary Science
Summary:
Researchers have discovered new aspects of the salmon immune system. His research looked at the immune cells in the gills of salmon and at immune responses to vaccination. A special type of tissue, rich in immune cells, was found in the gills, and new properties of immune cells that produce brown pigment were discovered.

A pigment area in a salmon fillet.
Credit: Trygve Poppe

During his doctoral thesis, Erlend Haugarvoll discovered new aspects of the salmon immune system. His research looked at the immune cells in the gills of salmon and at immune responses to vaccination. A special type of tissue, rich in immune cells, was found in the gills, and new properties of immune cells that produce brown pigment were discovered.

Successful salmon farming in Norway and other countries depends on the use of vaccination. Vaccination gives salmon good protection against several diseases, but has serious side-effects. Inflammatory reactions at the injection site can lead to reduced growth rate, reduced meat quality and deformities, raising both economical and ethical around current vaccination regimes. In order to improve resistance to disease in salmon, it is important to find alternative vaccination methods and to acquire more knowledge of how salmon react to vaccination.

Haugarvoll and his colleagues discovered in salmon gill a tissue extremely rich in immune cells. Salmon gills have extremely thin mucous membranes, and they absorb oxygen from the water while keeping out potentially damaging microbes. The fish are therefore dependent on good disease resistance in this organ. The discoveries made by Haugarvoll may prove extremely useful when new vaccines, free from damaging side effects, are developed.

Some fish immune cells contain the pigment melanin, which is the same substance that darkens the skin of people and animals. These cells have been called melanomacrophages and it has been assumed they play a central role in the defence of fish against microbes. The work of Haugarvoll and his associates showed that melanomacrophages in salmon produce their own melanin. There is also reason to believe that this pigment has an important role in the salmon defence system.

Vaccination is a very effective way of protecting animals against infectious disease and has nearly removed the need for antibiotics in Norwegian salmon farming. In his doctorate, Haugarvoll investigated currently unknown sides of fish immune defence, and his work gives hope that vaccines may be developed that can be applied externally.

Cand. med. vet. Erlend Haugarvoll defended his thesis for the degree of Doctor of Philosophy, entitled " Novel leukocyte localisations and characteristics in the Atlantic salmon", on December 16, 2008, at the Norwegian School of Veterinary Science.


Story Source:

The above story is based on materials provided by Norwegian School of Veterinary Science. Note: Materials may be edited for content and length.


Cite This Page:

Norwegian School of Veterinary Science. "Secretive Immune System Of Salmon." ScienceDaily. ScienceDaily, 2 February 2009. <www.sciencedaily.com/releases/2009/01/090127123117.htm>.
Norwegian School of Veterinary Science. (2009, February 2). Secretive Immune System Of Salmon. ScienceDaily. Retrieved August 30, 2014 from www.sciencedaily.com/releases/2009/01/090127123117.htm
Norwegian School of Veterinary Science. "Secretive Immune System Of Salmon." ScienceDaily. www.sciencedaily.com/releases/2009/01/090127123117.htm (accessed August 30, 2014).

Share This




More Plants & Animals News

Saturday, August 30, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Killer Amoeba Found in Louisiana Water System

Killer Amoeba Found in Louisiana Water System

AP (Aug. 28, 2014) State health officials say testing has confirmed the presence of a killer amoeba in a water system serving three St. John the Baptist Parish towns. (Aug. 28) Video provided by AP
Powered by NewsLook.com
Raw: Australian Sheep Gets Long Overdue Haircut

Raw: Australian Sheep Gets Long Overdue Haircut

AP (Aug. 28, 2014) Hoping to break the record for world's wooliest, Shaun the sheep came up 10 pounds shy with his fleece weighing over 50 pounds after being shorn for the first time in years. (Aug. 28) Video provided by AP
Powered by NewsLook.com
Minds Blown: Scientists Develop Fish That Walk On Land

Minds Blown: Scientists Develop Fish That Walk On Land

Newsy (Aug. 28, 2014) Canadian scientists looking into the very first land animals took a fish out of water and forced it to walk. Video provided by Newsy
Powered by NewsLook.com
Huge Ancient Wine Cellar Found In Israel

Huge Ancient Wine Cellar Found In Israel

Newsy (Aug. 28, 2014) An international team uncovered a large ancient wine celler that likely belonged to a Cannonite ruler. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins