Featured Research

from universities, journals, and other organizations

New microorganisms linked to gill disease in salmon

Date:
November 15, 2010
Source:
Norwegian School of Veterinary Science
Summary:
Gill disease may have several different causes, such as adverse environmental impacts or a variety of microorganisms. Researchers have identified microorganisms that may lead to gill disease, thereby making a significant contribution to our understanding of such diseases in farmed salmon.

Collection of bacteria (arrow) in the gill.
Credit: Agnar Kvellestad/Ole Bendik Dale

Gill disease may have several different causes, such as adverse environmental impacts or a variety of microorganisms. Terje M. Steinum's doctoral research has identified microorganisms that may lead to gill disease, thereby making a significant contribution to our understanding of such diseases in farmed salmon.

Gill disease poses a considerable problem to salmon farming. Disease-induced changes usually consist of massive lesions, which greatly reduce the surface area of the gills, thereby causing breathing problems which can lead to the death of the fish. These changes can have several different causes and cannot therefore be linked to one particular agent.

The main aim of the research was to identify microorganisms that are involved in gill disease by means of modern, molecular methods, combined with traditional, histopathological studies.

The results of Steinum's work indicate that two bacteria, Ca. Pisciclamydia salmonis and another species, not yet named, plus a recently discovered unicellular parasite, Desmozoon lepeophtherii, play a role in the development of the gill disease called proliferative gill inflammation.

In addition, the thesis shows that an amoeba called Neoparamoeba perurans, only recently discovered, is linked to the amoeba gill disease that was diagnosed for the first time in Norway four years ago.

Furthermore, Steinum's thesis has increased our basic knowledge through its description of other bacteria that normally occur in the gills of diseased and apparently healthy fish respectively.

This doctoral research led to the publishing of four scientific articles and was carried out at The National Veterinary Institute (VI) in collaboration with The Norwegian School of Veterinary Science (NVH) in Oslo.

Terje M. Steinum, Cand.scient, presented his doctoral thesis on 20th October 2010 at The Norwegian School of Veterinary Science. The thesis is entitled: "Microbial studies related to proliferative gill diseases in Atlantic salmon."


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. "New microorganisms linked to gill disease in salmon." ScienceDaily. ScienceDaily, 15 November 2010. <www.sciencedaily.com/releases/2010/11/101115074038.htm>.
Norwegian School of Veterinary Science. (2010, November 15). New microorganisms linked to gill disease in salmon. ScienceDaily. Retrieved October 2, 2014 from www.sciencedaily.com/releases/2010/11/101115074038.htm
Norwegian School of Veterinary Science. "New microorganisms linked to gill disease in salmon." ScienceDaily. www.sciencedaily.com/releases/2010/11/101115074038.htm (accessed October 2, 2014).

Share This



More Plants & Animals News

Thursday, October 2, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Dolphins and Turtles Under Threat in Pakistan

Dolphins and Turtles Under Threat in Pakistan

AFP (Oct. 2, 2014) — The turtles and Dolphins of Pakistan's Indus river - both protected by law - are in a fight for their survival as man's activities threatens their futures. Duration: 02:29 Video provided by AFP
Powered by NewsLook.com
'Harvest Break' Endures in Maine Potato Fields

'Harvest Break' Endures in Maine Potato Fields

AP (Oct. 2, 2014) — Educators and farmers are clinging to a tradition aimed at giving farmers much-needed help in getting potatoes out of the fields and into storage before the ground freezes in the nation's northeast corner. (Oct. 2) Video provided by AP
Powered by NewsLook.com
Attacking Superbugs

Attacking Superbugs

Ivanhoe (Oct. 1, 2014) — Two weapons hospitals can use to attack superbugs. Scientists in Ireland created a new gel resistant to superbugs, and a robot that can disinfect a room in minutes. Video provided by Ivanhoe
Powered by NewsLook.com
Cultural Learning In Wild Chimps Observed For The First Time

Cultural Learning In Wild Chimps Observed For The First Time

Newsy (Oct. 1, 2014) — Cultural transmission — the passing of knowledge from one animal to another — has been caught on camera with chimps teaching other chimps. 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:

Strange & Offbeat Stories

 

Plants & Animals

Earth & Climate

Fossils & Ruins

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