Featured Research

from universities, journals, and other organizations

Threat To Cod Fisheries: Pathogenic Bacterium Identified In Cod

Date:
February 17, 2009
Source:
Norwegian School of Veterinary Science
Summary:
Farmed cod have recently been hit by a serious disease caused by an unknown bacterium. The bacterium has now been identified, and called Francisella philomiragia noatunensis. The disease caused by the bacterium is now called francisellosis and is listed in the national disease register and regulated under the terms of the Norwegian Food Act.

Colonies of Francisella in growth medium.
Credit: Duncan Colquhoun, VI

Farmed cod have recently been hit by a serious disease caused by an unknown bacterium. In his doctorate, Jarle Mikalsen contributed to the identification of this bacterium, now called Francisella philomiragia noatunensis. The disease caused by the bacterium is now called francisellosis and is listed in the national disease register and regulated under the terms of the Norwegian Food Act.

Mikalsen's work with intracellular bacteria (bacteria living in body cells) of farmed cod and salmon has increased knowledge and improved the diagnostics of these bacteria. It has been an important contribution to the understanding of bacterial infections in the fish farming industry.

This thesis is the result of a collaboration by several Norwegian research environments. Its central goal was to increase our knowledge of bacterial infections of significance for health or economy in the farming industry. Mikalsen contributed to the development of new diagnostic methods for demonstrating pathogenic bacteria in Norwegian fish farming, and an important part of this work was the identification and characterisation of the bacterium Francisella philomiragia noatunensis.

This new bacterium has caused significant loss in the cod farming industry in recent years. However, it may also pose a threat to farmed salmon since it occurs naturally in coastal waters and is liable to cause disease in a range of marine species. The bacterium is not harmful to warm-blooded animals.

In addition to identifying Francisella, a breakthrough was achieved in the demonstration of the bacterium, Piscirickettsia salmonis. This is another intracellular bacterium that has caused significant loss in the fish farming industry both nationally and internationally, especially in Chile.

This doctorate produced six scientific articles and was carried out at the Norwegian Veterinary Institute in close collaboration with the research environment at the Norwegian School of Veterinary Science.

Cand. scient. Jarle Mikalsen defended his Ph. D. thesis, entitled "Diagnosis and characterisation of intracellular Gram-negative pathogens of marine and salmonid fish", at the Norwegian School of Veterinary Science, on November 21, 2008.


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. "Threat To Cod Fisheries: Pathogenic Bacterium Identified In Cod." ScienceDaily. ScienceDaily, 17 February 2009. <www.sciencedaily.com/releases/2009/02/090212093856.htm>.
Norwegian School of Veterinary Science. (2009, February 17). Threat To Cod Fisheries: Pathogenic Bacterium Identified In Cod. ScienceDaily. Retrieved September 19, 2014 from www.sciencedaily.com/releases/2009/02/090212093856.htm
Norwegian School of Veterinary Science. "Threat To Cod Fisheries: Pathogenic Bacterium Identified In Cod." ScienceDaily. www.sciencedaily.com/releases/2009/02/090212093856.htm (accessed September 19, 2014).

Share This



More Plants & Animals News

Friday, September 19, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Chocolate Museum Opens in Brussels

Chocolate Museum Opens in Brussels

AFP (Sep. 19, 2014) Considered a "national heritage" in Belgium, chocolate now has a new museum in Brussels. In a former chocolate factory, visitors to the permanent exhibition spaces, workshops and tastings can discover derivatives of the cocoa bean. Duration: 01:00 Video provided by AFP
Powered by NewsLook.com
Could Grief Affect The Immune Systems Of Senior Citizens?

Could Grief Affect The Immune Systems Of Senior Citizens?

Newsy (Sep. 19, 2014) The study found elderly people are much more likely to become susceptible to infection than younger adults going though a similar situation. Video provided by Newsy
Powered by NewsLook.com
Jury Delivers Verdict in Salmonella Trial

Jury Delivers Verdict in Salmonella Trial

AP (Sep. 19, 2014) A federal jury has convicted three people in connection with an outbreak of salmonella poisoning five years ago that sickened hundreds of people and was linked to a number of deaths. (Sept. 19) Video provided by AP
Powered by NewsLook.com
Raw: Elephant Undergoes Surgery in Tbilisi Zoo

Raw: Elephant Undergoes Surgery in Tbilisi Zoo

AP (Sep. 18, 2014) Grand the elephant has successfully undergone surgery to remove a portion of infected tusk at Tbilisi Zoo in Georgia. British veterinary surgeons used an electric drill to extract the infected piece. (Sept. 18) Video provided by AP
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