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 July 25, 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 July 25, 2014).

Share This




More Plants & Animals News

Friday, July 25, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Boy Attacked by Shark in Florida

Boy Attacked by Shark in Florida

Reuters - US Online Video (July 24, 2014) An 8-year-old boy is bitten in the leg by a shark while vacationing at a Florida beach. Linda So reports. Video provided by Reuters
Powered by NewsLook.com
Goma Cheese Brings Whiff of New Hope to DRC

Goma Cheese Brings Whiff of New Hope to DRC

Reuters - Business Video Online (July 24, 2014) The eastern region of the Democratic Republic of Congo, mainly known for conflict and instability, is an unlikely place for the production of fine cheese. But a farm in the village of Masisi, in North Kivu is slowly transforming perceptions of the area. Known simply as Goma cheese, the Congolese version of Dutch gouda has gained popularity through out the region. Ciara Sutton reports. Video provided by Reuters
Powered by NewsLook.com
Dogs Appear To Become Jealous Of Owners' Attention

Dogs Appear To Become Jealous Of Owners' Attention

Newsy (July 23, 2014) A U.C. San Diego researcher says jealousy isn't just a human trait, and dogs aren't the best at sharing the attention of humans with other dogs. Video provided by Newsy
Powered by NewsLook.com
Professor Creates Site Revealing Where People's Cats Live

Professor Creates Site Revealing Where People's Cats Live

Newsy (July 23, 2014) ​It's called I Know Where Your Cat Lives, and you can keep hitting the "Random Cat" button to find more real cats all over the world. 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